sim: overhaul & unify endian settings management

The m4 macro has 2 args: the "wire" settings (which represents the
hardwired port behavior), and the default settings (which are used
if nothing else is specified).  If none are specified, the arch is
expected to support both, and the value will be probed based on the
user runtime options or the input program.

Only two arches today set the default value (bpf & mips).  We can
probably let this go as it only shows up in one scenario: the sim
is invoked, but with no inputs, and no user endian selection.  This
means bpf will not behave like the other arches: an error is shown
and forces the user to make a choice.  If an input program is used
though, we'll still switch the default to that.  This allows us to
remove the WITH_DEFAULT_TARGET_BYTE_ORDER setting.

For the ports that set a "wire" endian, move it to the runtime init
of the respective sim_open calls.  This allows us to change the
WITH_TARGET_BYTE_ORDER to purely a user-selected configure setting
if they want to force a specific endianness.

With all the endian logic moved to runtime selection, we can move
the configure call up to the common dir so we only process it once
across all ports.

The ppc arch was picking the wire endian based on the target used,
but since we weren't doing that for other biendian arches, we can
let this go too.  We'll rely on the input selecting the endian, or
make the user decide.

151 files changed, 348 insertions, 1721 deletions

diff --git a/sim/ChangeLog b/sim/ChangeLog
index 109d5d8..9740e13 100644
--- a/sim/ChangeLog
+++ b/sim/ChangeLog
@@ -1,3 +1,10 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Call SIM_AC_OPTION_ENDIAN.
+	* m4/sim_ac_option_endian.m4: Delete wire & default arguments.
+	* m4/sim_ac_output.m4: Delete sim_alignment & sim_endian.
+	* aclocal.m4, Makefile.in, config.h.in, configure: Regenerate.
+
 2021-06-16  Simon Marchi  <simon.marchi@polymtl.ca>
 
 	* common/Make-common.in (COMPILE, libsim.a, run$(EXEEXT),
diff --git a/sim/Makefile.in b/sim/Makefile.in
index 3ba80a4..f77abe3 100644
--- a/sim/Makefile.in
+++ b/sim/Makefile.in
@@ -201,6 +201,7 @@ am__aclocal_m4_deps = $(top_srcdir)/../config/acx.m4 \
 	$(top_srcdir)/m4/sim_ac_option_alignment.m4 \
 	$(top_srcdir)/m4/sim_ac_option_assert.m4 \
 	$(top_srcdir)/m4/sim_ac_option_debug.m4 \
+	$(top_srcdir)/m4/sim_ac_option_endian.m4 \
 	$(top_srcdir)/m4/sim_ac_option_environment.m4 \
 	$(top_srcdir)/m4/sim_ac_option_profile.m4 \
 	$(top_srcdir)/m4/sim_ac_option_stdio.m4 \
diff --git a/sim/aarch64/ChangeLog b/sim/aarch64/ChangeLog
index ea1611d..a522fcf 100644
--- a/sim/aarch64/ChangeLog
+++ b/sim/aarch64/ChangeLog
@@ -1,3 +1,8 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/aarch64/aclocal.m4 b/sim/aarch64/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/aarch64/aclocal.m4
+++ b/sim/aarch64/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/aarch64/configure b/sim/aarch64/configure
index 3a18f37..2c8a6e0 100755
--- a/sim/aarch64/configure
+++ b/sim/aarch64/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,8 +752,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
@@ -1411,8 +1408,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
   --enable-sim-build-warnings
@@ -10742,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11144,52 +11139,6 @@ fi
 
 
 
-wire_endian=""
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
-
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
   enableval=$enable_werror; case "${enableval}" in
@@ -11412,8 +11361,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/aarch64/configure.ac b/sim/aarch64/configure.ac
index 7ac149a..849e957 100644
--- a/sim/aarch64/configure.ac
+++ b/sim/aarch64/configure.ac
@@ -24,6 +24,4 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN
-
 SIM_AC_OUTPUT
diff --git a/sim/aclocal.m4 b/sim/aclocal.m4
index f21cf08..773ba0f 100644
--- a/sim/aclocal.m4
+++ b/sim/aclocal.m4
@@ -1174,6 +1174,7 @@ m4_include([../config/override.m4])
 m4_include([m4/sim_ac_option_alignment.m4])
 m4_include([m4/sim_ac_option_assert.m4])
 m4_include([m4/sim_ac_option_debug.m4])
+m4_include([m4/sim_ac_option_endian.m4])
 m4_include([m4/sim_ac_option_environment.m4])
 m4_include([m4/sim_ac_option_profile.m4])
 m4_include([m4/sim_ac_option_stdio.m4])
diff --git a/sim/arm/ChangeLog b/sim/arm/ChangeLog
index b4a42be..8bb9bff 100644
--- a/sim/arm/ChangeLog
+++ b/sim/arm/ChangeLog
@@ -1,3 +1,8 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/arm/aclocal.m4 b/sim/arm/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/arm/aclocal.m4
+++ b/sim/arm/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/arm/configure b/sim/arm/configure
index 3a18f37..2c8a6e0 100755
--- a/sim/arm/configure
+++ b/sim/arm/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,8 +752,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
@@ -1411,8 +1408,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
   --enable-sim-build-warnings
@@ -10742,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11144,52 +11139,6 @@ fi
 
 
 
-wire_endian=""
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
-
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
   enableval=$enable_werror; case "${enableval}" in
@@ -11412,8 +11361,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/arm/configure.ac b/sim/arm/configure.ac
index ec8a87e..08bf6ff 100644
--- a/sim/arm/configure.ac
+++ b/sim/arm/configure.ac
@@ -4,6 +4,4 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN
-
 SIM_AC_OUTPUT
diff --git a/sim/avr/ChangeLog b/sim/avr/ChangeLog
index 08f0558..156e7f2 100644
--- a/sim/avr/ChangeLog
+++ b/sim/avr/ChangeLog
@@ -1,3 +1,9 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* interp.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/avr/aclocal.m4 b/sim/avr/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/avr/aclocal.m4
+++ b/sim/avr/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/avr/configure b/sim/avr/configure
index 9999079..2c8a6e0 100755
--- a/sim/avr/configure
+++ b/sim/avr/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,8 +752,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
@@ -1411,8 +1408,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
   --enable-sim-build-warnings
@@ -10742,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11144,52 +11139,6 @@ fi
 
 
 
-wire_endian="LITTLE"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
-
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
   enableval=$enable_werror; case "${enableval}" in
@@ -11412,8 +11361,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/avr/configure.ac b/sim/avr/configure.ac
index 8cd4d23..08bf6ff 100644
--- a/sim/avr/configure.ac
+++ b/sim/avr/configure.ac
@@ -4,6 +4,4 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(LITTLE)
-
 SIM_AC_OUTPUT
diff --git a/sim/avr/interp.c b/sim/avr/interp.c
index 1626fad..2bd7273 100644
--- a/sim/avr/interp.c
+++ b/sim/avr/interp.c
@@ -1686,6 +1686,7 @@ sim_open (SIM_OPEN_KIND kind, host_callback *cb,
 
   /* Set default options before parsing user options.  */
   current_alignment = STRICT_ALIGNMENT;
+  current_target_byte_order = BFD_ENDIAN_LITTLE;
 
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
diff --git a/sim/bfin/ChangeLog b/sim/bfin/ChangeLog
index da2ef6e..fa97d8e 100644
--- a/sim/bfin/ChangeLog
+++ b/sim/bfin/ChangeLog
@@ -1,3 +1,9 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* interp.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/bfin/aclocal.m4 b/sim/bfin/aclocal.m4
index 529d860..4957db8 100644
--- a/sim/bfin/aclocal.m4
+++ b/sim/bfin/aclocal.m4
@@ -112,7 +112,6 @@ m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_default_model.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/bfin/configure b/sim/bfin/configure
index b19f154..d4aa3a2 100755
--- a/sim/bfin/configure
+++ b/sim/bfin/configure
@@ -635,7 +635,6 @@ sim_reserved_bits
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 SDL_LIBS
 SDL_CFLAGS
@@ -758,7 +757,6 @@ sim_inline
 sim_hw
 sim_hw_objs
 sim_hw_cflags
-sim_endian
 sim_default_model'
 ac_subst_files=''
 ac_user_opts='
@@ -773,7 +771,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_sim_default_model
 enable_sim_hardware
 enable_werror
@@ -1422,8 +1419,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-sim-default-model=model
                           Specify default model to simulate
   --enable-sim-hardware=LIST
@@ -10762,7 +10757,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10765 "configure"
+#line 10760 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10868,7 +10863,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10871 "configure"
+#line 10866 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11164,51 +11159,6 @@ fi
 
 
 
-wire_endian="LITTLE"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
 default_sim_default_model="bf537"
 # Check whether --enable-sim-default-model was given.
 if test "${enable_sim_default_model+set}" = set; then :
@@ -11744,8 +11694,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/bfin/configure.ac b/sim/bfin/configure.ac
index ddc7bc6..9b17dc4 100644
--- a/sim/bfin/configure.ac
+++ b/sim/bfin/configure.ac
@@ -4,7 +4,6 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(LITTLE)
 SIM_AC_OPTION_DEFAULT_MODEL(bf537)
 SIM_AC_OPTION_HARDWARE(\
 	bfin_cec \
diff --git a/sim/bfin/interp.c b/sim/bfin/interp.c
index 10de001..216cefe 100644
--- a/sim/bfin/interp.c
+++ b/sim/bfin/interp.c
@@ -704,6 +704,7 @@ sim_open (SIM_OPEN_KIND kind, host_callback *callback,
 
   /* Set default options before parsing user options.  */
   current_alignment = STRICT_ALIGNMENT;
+  current_target_byte_order = BFD_ENDIAN_LITTLE;
 
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
diff --git a/sim/bpf/ChangeLog b/sim/bpf/ChangeLog
index 2b76835..5e2b222 100644
--- a/sim/bpf/ChangeLog
+++ b/sim/bpf/ChangeLog
@@ -1,3 +1,8 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/bpf/aclocal.m4 b/sim/bpf/aclocal.m4
index 8298e1f..d3a5693 100644
--- a/sim/bpf/aclocal.m4
+++ b/sim/bpf/aclocal.m4
@@ -113,7 +113,6 @@ m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_bitsize.m4])
 m4_include([../m4/sim_ac_option_cgen_maint.m4])
 m4_include([../m4/sim_ac_option_default_model.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_scache.m4])
diff --git a/sim/bpf/configure b/sim/bpf/configure
index 102f1b8..a0ed8ab 100755
--- a/sim/bpf/configure
+++ b/sim/bpf/configure
@@ -633,7 +633,6 @@ ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
 sim_float
-sim_alignment
 cgen_breaks
 cgen
 cgendir
@@ -755,7 +754,6 @@ sim_inline
 sim_hw
 sim_hw_objs
 sim_hw_cflags
-sim_endian
 sim_default_model
 sim_bitsize'
 ac_subst_files=''
@@ -772,7 +770,6 @@ enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
 enable_sim_bitsize
-enable_sim_endian
 enable_sim_scache
 enable_sim_default_model
 enable_werror
@@ -1419,8 +1416,6 @@ Optional Features:
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
   --enable-sim-bitsize=N  Specify target bitsize (32 or 64)
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-sim-scache=size
                           Specify simulator execution cache size
   --enable-sim-default-model=model
@@ -10755,7 +10750,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10758 "configure"
+#line 10753 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10861,7 +10856,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10864 "configure"
+#line 10859 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11216,51 +11211,6 @@ fi
 fi
 
 
-wire_endian=""
-default_endian="LITTLE"
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
 default_sim_scache="16384"
 # Check whether --enable-sim-scache was given.
 if test "${enable_sim_scache+set}" = set; then :
@@ -11549,8 +11499,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/bpf/configure.ac b/sim/bpf/configure.ac
index 4e00c13..d2ec00c 100644
--- a/sim/bpf/configure.ac
+++ b/sim/bpf/configure.ac
@@ -5,7 +5,6 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 SIM_AC_COMMON
 
 SIM_AC_OPTION_BITSIZE([64])
-SIM_AC_OPTION_ENDIAN([], [LITTLE])
 SIM_AC_OPTION_SCACHE(16384)
 SIM_AC_OPTION_DEFAULT_MODEL([bpf-def])
 SIM_AC_OPTION_WARNINGS(no)
diff --git a/sim/common/ChangeLog b/sim/common/ChangeLog
index abb2ec6..0d260eb 100644
--- a/sim/common/ChangeLog
+++ b/sim/common/ChangeLog
@@ -1,5 +1,13 @@
 2021-06-17  Mike Frysinger  <vapier@gentoo.org>
 
+	* Make-common.in (SIM_ENDIAN): Delete.
+	* sim-config.c (sim_config): Delete WITH_DEFAULT_TARGET_BYTE_ORDER.
+	(sim_config_print): Likewise.
+	* sim-config.h (WITH_TARGET_BYTE_ORDER): Delete.
+	(WITH_DEFAULT_TARGET_BYTE_ORDER): Likewise.
+
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
 	* cgen-trace.c: Include sim/callback.h.
 	* nrun.c, sim-hw.c, sim-io.c, sim-syscall.c, sim-trace.c: Likewise.
 	* sim-basics.h: Delete sim/callback.h include.
diff --git a/sim/common/Make-common.in b/sim/common/Make-common.in
index 0ab9e79..7a6a203 100644
--- a/sim/common/Make-common.in
+++ b/sim/common/Make-common.in
@@ -86,7 +86,6 @@ LDFLAGS = @LDFLAGS@
 
 SIM_BITSIZE = @sim_bitsize@
 SIM_DEFAULT_MODEL = @sim_default_model@
-SIM_ENDIAN = @sim_endian@
 SIM_FLOAT = @sim_float@
 SIM_HW_CFLAGS = @sim_hw_cflags@
 SIM_HW_OBJS = @sim_hw_objs@
@@ -223,7 +222,6 @@ CONFIG_CFLAGS = \
 	-DHAVE_CONFIG_H \
 	$(SIM_DEFAULT_MODEL) \
 	$(SIM_BITSIZE) \
-	$(SIM_ENDIAN) \
 	$(SIM_FLOAT) \
 	$(SIM_HW_CFLAGS) \
 	$(SIM_INLINE) \
diff --git a/sim/common/sim-config.c b/sim/common/sim-config.c
index c9005f4..fc6b09a 100644
--- a/sim/common/sim-config.c
+++ b/sim/common/sim-config.c
@@ -169,8 +169,6 @@ sim_config (SIM_DESC sd)
     current_target_byte_order = prefered_target_byte_order;
   if (current_target_byte_order == BFD_ENDIAN_UNKNOWN)
     current_target_byte_order = WITH_TARGET_BYTE_ORDER;
-  if (current_target_byte_order == BFD_ENDIAN_UNKNOWN)
-    current_target_byte_order = WITH_DEFAULT_TARGET_BYTE_ORDER;
 
   /* verify the target byte order */
   if (CURRENT_TARGET_BYTE_ORDER == BFD_ENDIAN_UNKNOWN)
@@ -302,9 +300,6 @@ sim_config_print (SIM_DESC sd)
   sim_io_printf (sd, "WITH_TARGET_BYTE_ORDER = %s\n",
 		 config_byte_order_to_a (WITH_TARGET_BYTE_ORDER));
 
-  sim_io_printf (sd, "WITH_DEFAULT_TARGET_BYTE_ORDER = %s\n",
-		 config_byte_order_to_a (WITH_DEFAULT_TARGET_BYTE_ORDER));
-
   sim_io_printf (sd, "HOST_BYTE_ORDER = %s\n",
 		 config_byte_order_to_a (HOST_BYTE_ORDER));
 
diff --git a/sim/common/sim-config.h b/sim/common/sim-config.h
index 2b6ed3d..5b1713c 100644
--- a/sim/common/sim-config.h
+++ b/sim/common/sim-config.h
@@ -50,14 +50,6 @@
 
    Possible values are BFD_ENDIAN_UNKNOWN, BFD_ENDIAN_LITTLE, or BFD_ENDIAN_BIG.  */
 
-#ifndef WITH_TARGET_BYTE_ORDER
-#define WITH_TARGET_BYTE_ORDER		BFD_ENDIAN_UNKNOWN
-#endif
-
-#ifndef WITH_DEFAULT_TARGET_BYTE_ORDER
-#define WITH_DEFAULT_TARGET_BYTE_ORDER	BFD_ENDIAN_UNKNOWN
-#endif
-
 extern enum bfd_endian current_target_byte_order;
 #define CURRENT_TARGET_BYTE_ORDER \
   (WITH_TARGET_BYTE_ORDER != BFD_ENDIAN_UNKNOWN \
diff --git a/sim/config.h.in b/sim/config.h.in
index 6e87686..af6b591 100644
--- a/sim/config.h.in
+++ b/sim/config.h.in
@@ -452,6 +452,9 @@
 /* How to route I/O */
 #undef WITH_STDIO
 
+/* Sim endian settings */
+#undef WITH_TARGET_BYTE_ORDER
+
 /* Sim trace settings */
 #undef WITH_TRACE
 
diff --git a/sim/configure b/sim/configure
index 5bfbd60..959fa90 100755
--- a/sim/configure
+++ b/sim/configure
@@ -758,6 +758,7 @@ enable_targets
 enable_sim_alignment
 enable_sim_assert
 enable_sim_debug
+enable_sim_endian
 enable_sim_environment
 enable_sim_profile
 enable_sim_stdio
@@ -1440,6 +1441,8 @@ Optional Features:
   --enable-sim-assert     Specify whether to perform random assertions
   --enable-sim-debug=opts Enable debugging flags (for developers of the sim
                           itself)
+  --enable-sim-endian=endian
+                          Specify target byte endian orientation
   --enable-sim-environment=environment
                           Specify mixed, user, virtual or operating
                           environment
@@ -6751,6 +6754,26 @@ _ACEOF
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $sim_debug" >&5
 $as_echo "$sim_debug" >&6; }
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to force sim endianness" >&5
+$as_echo_n "checking whether to force sim endianness... " >&6; }
+sim_endian=
+# Check whether --enable-sim-endian was given.
+if test "${enable_sim_endian+set}" = set; then :
+  enableval=$enable_sim_endian; case "${enableval}" in
+  b*|B*) sim_endian="BFD_ENDIAN_BIG";;
+  l*|L*) sim_endian="BFD_ENDIAN_LITTLE";;
+  yes | no) ;;
+  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5;;
+esac
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define WITH_TARGET_BYTE_ORDER ${sim_endian:-BFD_ENDIAN_UNKNOWN}
+_ACEOF
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: ${sim_alignment:-no}" >&5
+$as_echo "${sim_alignment:-no}" >&6; }
+
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking default sim environment setting" >&5
 $as_echo_n "checking default sim environment setting... " >&6; }
diff --git a/sim/configure.ac b/sim/configure.ac
index 129e942..4ba2921 100644
--- a/sim/configure.ac
+++ b/sim/configure.ac
@@ -112,6 +112,7 @@ dnl Eventually all simulators will support these.
 SIM_AC_OPTION_ALIGNMENT
 SIM_AC_OPTION_ASSERT
 SIM_AC_OPTION_DEBUG
+SIM_AC_OPTION_ENDIAN
 SIM_AC_OPTION_ENVIRONMENT
 SIM_AC_OPTION_PROFILE
 SIM_AC_OPTION_STDIO
diff --git a/sim/cr16/ChangeLog b/sim/cr16/ChangeLog
index 231b535..dc4c1e8 100644
--- a/sim/cr16/ChangeLog
+++ b/sim/cr16/ChangeLog
@@ -1,3 +1,9 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* interp.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/cr16/aclocal.m4 b/sim/cr16/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/cr16/aclocal.m4
+++ b/sim/cr16/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/cr16/configure b/sim/cr16/configure
index 9999079..2c8a6e0 100755
--- a/sim/cr16/configure
+++ b/sim/cr16/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,8 +752,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
@@ -1411,8 +1408,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
   --enable-sim-build-warnings
@@ -10742,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11144,52 +11139,6 @@ fi
 
 
 
-wire_endian="LITTLE"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
-
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
   enableval=$enable_werror; case "${enableval}" in
@@ -11412,8 +11361,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/cr16/configure.ac b/sim/cr16/configure.ac
index 8cd4d23..08bf6ff 100644
--- a/sim/cr16/configure.ac
+++ b/sim/cr16/configure.ac
@@ -4,6 +4,4 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(LITTLE)
-
 SIM_AC_OUTPUT
diff --git a/sim/cr16/interp.c b/sim/cr16/interp.c
index 7f6b07f..6e3438c 100644
--- a/sim/cr16/interp.c
+++ b/sim/cr16/interp.c
@@ -398,6 +398,9 @@ sim_open (SIM_OPEN_KIND kind, struct host_callback_struct *cb,
   SIM_DESC sd = sim_state_alloc (kind, cb);
   SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
 
+  /* Set default options before parsing user options.  */
+  current_target_byte_order = BFD_ENDIAN_LITTLE;
+
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
     {
diff --git a/sim/cris/ChangeLog b/sim/cris/ChangeLog
index 2408419..61d064c 100644
--- a/sim/cris/ChangeLog
+++ b/sim/cris/ChangeLog
@@ -1,5 +1,11 @@
 2021-06-17  Mike Frysinger  <vapier@gentoo.org>
 
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* sim-if.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
 	* traps.c: Include sim/callback.h.
 
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
diff --git a/sim/cris/aclocal.m4 b/sim/cris/aclocal.m4
index 4fb0bd7..6129398 100644
--- a/sim/cris/aclocal.m4
+++ b/sim/cris/aclocal.m4
@@ -112,7 +112,6 @@ m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_cgen_maint.m4])
 m4_include([../m4/sim_ac_option_default_model.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_scache.m4])
diff --git a/sim/cris/configure b/sim/cris/configure
index 21171f0..cd6fe78 100755
--- a/sim/cris/configure
+++ b/sim/cris/configure
@@ -634,7 +634,6 @@ LIBOBJS
 sim_reserved_bits
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 cgen
 cgendir
@@ -756,7 +755,6 @@ sim_inline
 sim_hw
 sim_hw_objs
 sim_hw_cflags
-sim_endian
 sim_default_model'
 ac_subst_files=''
 ac_user_opts='
@@ -771,7 +769,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_sim_scache
 enable_werror
 enable_build_warnings
@@ -1417,8 +1414,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-sim-scache=size
                           Specify simulator execution cache size
   --enable-werror         treat compile warnings as errors
@@ -10753,7 +10748,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10756 "configure"
+#line 10751 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10859,7 +10854,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10862 "configure"
+#line 10857 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11155,51 +11150,6 @@ fi
 
 
 
-wire_endian="LITTLE"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
 default_sim_scache="16384"
 # Check whether --enable-sim-scache was given.
 if test "${enable_sim_scache+set}" = set; then :
@@ -11490,8 +11440,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/cris/configure.ac b/sim/cris/configure.ac
index cc5bb49..48c4bbe 100644
--- a/sim/cris/configure.ac
+++ b/sim/cris/configure.ac
@@ -4,7 +4,6 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(LITTLE)
 SIM_AC_OPTION_SCACHE(16384)
 SIM_AC_OPTION_WARNINGS(no)
 SIM_AC_OPTION_HARDWARE(rv cris cris_900000xx)
diff --git a/sim/cris/sim-if.c b/sim/cris/sim-if.c
index c6dcc23..c183856 100644
--- a/sim/cris/sim-if.c
+++ b/sim/cris/sim-if.c
@@ -654,6 +654,9 @@ sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd,
      standard ;-) that the rest of the elements won't be initialized.  */
   bfd_byte sp_init[4] = {0, 0, 0, 0};
 
+  /* Set default options before parsing user options.  */
+  current_target_byte_order = BFD_ENDIAN_LITTLE;
+
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
     {
diff --git a/sim/d10v/ChangeLog b/sim/d10v/ChangeLog
index 1154ab7..d588176 100644
--- a/sim/d10v/ChangeLog
+++ b/sim/d10v/ChangeLog
@@ -1,3 +1,8 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/d10v/aclocal.m4 b/sim/d10v/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/d10v/aclocal.m4
+++ b/sim/d10v/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/d10v/configure b/sim/d10v/configure
index 3a18f37..2c8a6e0 100755
--- a/sim/d10v/configure
+++ b/sim/d10v/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,8 +752,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
@@ -1411,8 +1408,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
   --enable-sim-build-warnings
@@ -10742,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11144,52 +11139,6 @@ fi
 
 
 
-wire_endian=""
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
-
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
   enableval=$enable_werror; case "${enableval}" in
@@ -11412,8 +11361,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/d10v/configure.ac b/sim/d10v/configure.ac
index ec8a87e..08bf6ff 100644
--- a/sim/d10v/configure.ac
+++ b/sim/d10v/configure.ac
@@ -4,6 +4,4 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN
-
 SIM_AC_OUTPUT
diff --git a/sim/erc32/ChangeLog b/sim/erc32/ChangeLog
index 72e69c3..24d1aac 100644
--- a/sim/erc32/ChangeLog
+++ b/sim/erc32/ChangeLog
@@ -1,3 +1,7 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/erc32/configure b/sim/erc32/configure
index 2493f96..2b10dc4 100755
--- a/sim/erc32/configure
+++ b/sim/erc32/configure
@@ -635,9 +635,7 @@ sim_reserved_bits
 sim_default_model
 sim_scache
 sim_float
-sim_endian
 sim_bitsize
-sim_alignment
 cgen_breaks
 READLINE_CFLAGS
 READLINE
@@ -10742,7 +10740,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10743 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10846,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10849 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11504,8 +11502,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/example-synacor/ChangeLog b/sim/example-synacor/ChangeLog
index 7737e9c..4f2c8c5 100644
--- a/sim/example-synacor/ChangeLog
+++ b/sim/example-synacor/ChangeLog
@@ -1,3 +1,9 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* interp.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/example-synacor/aclocal.m4 b/sim/example-synacor/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/example-synacor/aclocal.m4
+++ b/sim/example-synacor/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/example-synacor/configure b/sim/example-synacor/configure
index 9999079..2c8a6e0 100755
--- a/sim/example-synacor/configure
+++ b/sim/example-synacor/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,8 +752,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
@@ -1411,8 +1408,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
   --enable-sim-build-warnings
@@ -10742,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11144,52 +11139,6 @@ fi
 
 
 
-wire_endian="LITTLE"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
-
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
   enableval=$enable_werror; case "${enableval}" in
@@ -11412,8 +11361,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/example-synacor/configure.ac b/sim/example-synacor/configure.ac
index 8cd4d23..08bf6ff 100644
--- a/sim/example-synacor/configure.ac
+++ b/sim/example-synacor/configure.ac
@@ -4,6 +4,4 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(LITTLE)
-
 SIM_AC_OUTPUT
diff --git a/sim/example-synacor/interp.c b/sim/example-synacor/interp.c
index 784c9cb..57b1bee 100644
--- a/sim/example-synacor/interp.c
+++ b/sim/example-synacor/interp.c
@@ -84,6 +84,7 @@ sim_open (SIM_OPEN_KIND kind, host_callback *callback,
 
   /* Set default options before parsing user options.  */
   current_alignment = STRICT_ALIGNMENT;
+  current_target_byte_order = BFD_ENDIAN_LITTLE;
 
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
diff --git a/sim/frv/ChangeLog b/sim/frv/ChangeLog
index 80b33cd..264d33e 100644
--- a/sim/frv/ChangeLog
+++ b/sim/frv/ChangeLog
@@ -1,5 +1,11 @@
 2021-06-17  Mike Frysinger  <vapier@gentoo.org>
 
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* sim-if.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
 	* traps.c: Include sim/callback.h.
 
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
diff --git a/sim/frv/aclocal.m4 b/sim/frv/aclocal.m4
index 4fb0bd7..6129398 100644
--- a/sim/frv/aclocal.m4
+++ b/sim/frv/aclocal.m4
@@ -112,7 +112,6 @@ m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_cgen_maint.m4])
 m4_include([../m4/sim_ac_option_default_model.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_scache.m4])
diff --git a/sim/frv/configure b/sim/frv/configure
index cf39e6e..a578200 100755
--- a/sim/frv/configure
+++ b/sim/frv/configure
@@ -634,7 +634,6 @@ LIBOBJS
 sim_reserved_bits
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 sim_trapdump
 cgen
@@ -757,7 +756,6 @@ sim_inline
 sim_hw
 sim_hw_objs
 sim_hw_cflags
-sim_endian
 sim_default_model'
 ac_subst_files=''
 ac_user_opts='
@@ -772,7 +770,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_sim_scache
 enable_sim_default_model
 enable_werror
@@ -1419,8 +1416,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-sim-scache=size
                           Specify simulator execution cache size
   --enable-sim-default-model=model
@@ -10756,7 +10751,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10759 "configure"
+#line 10754 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10862,7 +10857,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10865 "configure"
+#line 10860 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11158,51 +11153,6 @@ fi
 
 
 
-wire_endian="BIG"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
 default_sim_scache="16384"
 # Check whether --enable-sim-scache was given.
 if test "${enable_sim_scache+set}" = set; then :
@@ -11509,8 +11459,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/frv/configure.ac b/sim/frv/configure.ac
index fcc2e88..39d8de4 100644
--- a/sim/frv/configure.ac
+++ b/sim/frv/configure.ac
@@ -4,7 +4,6 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(BIG)
 SIM_AC_OPTION_SCACHE(16384)
 SIM_AC_OPTION_DEFAULT_MODEL(fr500)
 SIM_AC_OPTION_WARNINGS(no)
diff --git a/sim/frv/sim-if.c b/sim/frv/sim-if.c
index 0ad5f62..758e17a 100644
--- a/sim/frv/sim-if.c
+++ b/sim/frv/sim-if.c
@@ -56,6 +56,7 @@ sim_open (SIM_OPEN_KIND kind, host_callback *callback, bfd *abfd,
 
   /* Set default options before parsing user options.  */
   current_alignment = STRICT_ALIGNMENT;
+  current_target_byte_order = BFD_ENDIAN_BIG;
 
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
diff --git a/sim/ft32/ChangeLog b/sim/ft32/ChangeLog
index db9ea4f..bb7ea80 100644
--- a/sim/ft32/ChangeLog
+++ b/sim/ft32/ChangeLog
@@ -1,3 +1,9 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* interp.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/ft32/aclocal.m4 b/sim/ft32/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/ft32/aclocal.m4
+++ b/sim/ft32/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/ft32/configure b/sim/ft32/configure
index 9999079..2c8a6e0 100755
--- a/sim/ft32/configure
+++ b/sim/ft32/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,8 +752,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
@@ -1411,8 +1408,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
   --enable-sim-build-warnings
@@ -10742,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11144,52 +11139,6 @@ fi
 
 
 
-wire_endian="LITTLE"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
-
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
   enableval=$enable_werror; case "${enableval}" in
@@ -11412,8 +11361,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/ft32/configure.ac b/sim/ft32/configure.ac
index 8cd4d23..08bf6ff 100644
--- a/sim/ft32/configure.ac
+++ b/sim/ft32/configure.ac
@@ -4,6 +4,4 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(LITTLE)
-
 SIM_AC_OUTPUT
diff --git a/sim/ft32/interp.c b/sim/ft32/interp.c
index 8a44a47..77ed8f8 100644
--- a/sim/ft32/interp.c
+++ b/sim/ft32/interp.c
@@ -810,6 +810,7 @@ sim_open (SIM_OPEN_KIND kind,
 
   /* Set default options before parsing user options.  */
   current_alignment = STRICT_ALIGNMENT;
+  current_target_byte_order = BFD_ENDIAN_LITTLE;
 
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
diff --git a/sim/h8300/ChangeLog b/sim/h8300/ChangeLog
index e12242c..57ada18 100644
--- a/sim/h8300/ChangeLog
+++ b/sim/h8300/ChangeLog
@@ -1,5 +1,11 @@
 2021-06-17  Mike Frysinger  <vapier@gentoo.org>
 
+	* compile.c (sim_open): Set current_target_byte_order.
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* aclocal.m4, configure: Regenerate.
+
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
 	* compile.c: Include sim/callback.h.
 
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
diff --git a/sim/h8300/aclocal.m4 b/sim/h8300/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/h8300/aclocal.m4
+++ b/sim/h8300/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/h8300/compile.c b/sim/h8300/compile.c
index 8b13326a..565eadf 100644
--- a/sim/h8300/compile.c
+++ b/sim/h8300/compile.c
@@ -4716,6 +4716,9 @@ sim_open (SIM_OPEN_KIND kind,
 
   sd = sim_state_alloc_extra (kind, callback, sizeof (struct h8300_sim_state));
 
+  /* Set default options before parsing user options.  */
+  current_target_byte_order = BFD_ENDIAN_BIG;
+
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
     {
diff --git a/sim/h8300/configure b/sim/h8300/configure
index c7b857c..2c8a6e0 100755
--- a/sim/h8300/configure
+++ b/sim/h8300/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,8 +752,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
@@ -1411,8 +1408,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
   --enable-sim-build-warnings
@@ -10742,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11144,52 +11139,6 @@ fi
 
 
 
-wire_endian="BIG"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
-
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
   enableval=$enable_werror; case "${enableval}" in
@@ -11412,8 +11361,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/h8300/configure.ac b/sim/h8300/configure.ac
index 7e2a166..08bf6ff 100644
--- a/sim/h8300/configure.ac
+++ b/sim/h8300/configure.ac
@@ -4,6 +4,4 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(BIG)
-
 SIM_AC_OUTPUT
diff --git a/sim/iq2000/ChangeLog b/sim/iq2000/ChangeLog
index d9b2883..63797de 100644
--- a/sim/iq2000/ChangeLog
+++ b/sim/iq2000/ChangeLog
@@ -1,3 +1,9 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* sim-if.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/iq2000/aclocal.m4 b/sim/iq2000/aclocal.m4
index 4fb0bd7..6129398 100644
--- a/sim/iq2000/aclocal.m4
+++ b/sim/iq2000/aclocal.m4
@@ -112,7 +112,6 @@ m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_cgen_maint.m4])
 m4_include([../m4/sim_ac_option_default_model.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_scache.m4])
diff --git a/sim/iq2000/configure b/sim/iq2000/configure
index 0c73323..a646739 100755
--- a/sim/iq2000/configure
+++ b/sim/iq2000/configure
@@ -634,7 +634,6 @@ LIBOBJS
 sim_reserved_bits
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 cgen
 cgendir
@@ -756,7 +755,6 @@ sim_inline
 sim_hw
 sim_hw_objs
 sim_hw_cflags
-sim_endian
 sim_default_model'
 ac_subst_files=''
 ac_user_opts='
@@ -771,7 +769,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_sim_scache
 enable_sim_default_model
 enable_werror
@@ -1417,8 +1414,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-sim-scache=size
                           Specify simulator execution cache size
   --enable-sim-default-model=model
@@ -10753,7 +10748,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10756 "configure"
+#line 10751 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10859,7 +10854,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10862 "configure"
+#line 10857 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11155,51 +11150,6 @@ fi
 
 
 
-wire_endian="BIG"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
 default_sim_scache="16384"
 # Check whether --enable-sim-scache was given.
 if test "${enable_sim_scache+set}" = set; then :
@@ -11488,8 +11438,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/iq2000/configure.ac b/sim/iq2000/configure.ac
index c61c948..4afa1b3 100644
--- a/sim/iq2000/configure.ac
+++ b/sim/iq2000/configure.ac
@@ -4,7 +4,6 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(BIG)
 SIM_AC_OPTION_SCACHE(16384)
 SIM_AC_OPTION_DEFAULT_MODEL(iq2000)
 SIM_AC_OPTION_WARNINGS(no)
diff --git a/sim/iq2000/sim-if.c b/sim/iq2000/sim-if.c
index 82ac53f..1129cee 100644
--- a/sim/iq2000/sim-if.c
+++ b/sim/iq2000/sim-if.c
@@ -62,6 +62,7 @@ sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd,
 
   /* Set default options before parsing user options.  */
   current_alignment = STRICT_ALIGNMENT;
+  current_target_byte_order = BFD_ENDIAN_BIG;
 
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
diff --git a/sim/lm32/ChangeLog b/sim/lm32/ChangeLog
index c239faf..57cbf65 100644
--- a/sim/lm32/ChangeLog
+++ b/sim/lm32/ChangeLog
@@ -1,3 +1,9 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* sim-if.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/lm32/aclocal.m4 b/sim/lm32/aclocal.m4
index 4fb0bd7..6129398 100644
--- a/sim/lm32/aclocal.m4
+++ b/sim/lm32/aclocal.m4
@@ -112,7 +112,6 @@ m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_cgen_maint.m4])
 m4_include([../m4/sim_ac_option_default_model.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_scache.m4])
diff --git a/sim/lm32/configure b/sim/lm32/configure
index 5a80fc3..6c1d03d 100755
--- a/sim/lm32/configure
+++ b/sim/lm32/configure
@@ -634,7 +634,6 @@ LIBOBJS
 sim_reserved_bits
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 cgen
 cgendir
@@ -756,7 +755,6 @@ sim_inline
 sim_hw
 sim_hw_objs
 sim_hw_cflags
-sim_endian
 sim_default_model'
 ac_subst_files=''
 ac_user_opts='
@@ -771,7 +769,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_sim_scache
 enable_sim_default_model
 enable_werror
@@ -1417,8 +1414,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-sim-scache=size
                           Specify simulator execution cache size
   --enable-sim-default-model=model
@@ -10753,7 +10748,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10756 "configure"
+#line 10751 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10859,7 +10854,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10862 "configure"
+#line 10857 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11155,51 +11150,6 @@ fi
 
 
 
-wire_endian="BIG"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
 default_sim_scache="16384"
 # Check whether --enable-sim-scache was given.
 if test "${enable_sim_scache+set}" = set; then :
@@ -11488,8 +11438,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/lm32/configure.ac b/sim/lm32/configure.ac
index 4a20374..06c6556 100644
--- a/sim/lm32/configure.ac
+++ b/sim/lm32/configure.ac
@@ -4,7 +4,6 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(BIG)
 SIM_AC_OPTION_SCACHE(16384)
 SIM_AC_OPTION_DEFAULT_MODEL(lm32)
 SIM_AC_OPTION_WARNINGS(no)
diff --git a/sim/lm32/sim-if.c b/sim/lm32/sim-if.c
index fba2d63..0142868 100644
--- a/sim/lm32/sim-if.c
+++ b/sim/lm32/sim-if.c
@@ -93,6 +93,7 @@ sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd,
 
   /* Set default options before parsing user options.  */
   current_alignment = STRICT_ALIGNMENT;
+  current_target_byte_order = BFD_ENDIAN_BIG;
 
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
diff --git a/sim/m32c/ChangeLog b/sim/m32c/ChangeLog
index add2dae..18a2882 100644
--- a/sim/m32c/ChangeLog
+++ b/sim/m32c/ChangeLog
@@ -1,3 +1,7 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/m32c/configure b/sim/m32c/configure
index 571fdbc..2c8a6e0 100755
--- a/sim/m32c/configure
+++ b/sim/m32c/configure
@@ -635,9 +635,7 @@ sim_reserved_bits
 sim_default_model
 sim_scache
 sim_float
-sim_endian
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -10739,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10742 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10845,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10848 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11363,8 +11361,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/m32r/ChangeLog b/sim/m32r/ChangeLog
index 48b8f1e..9ff4abc 100644
--- a/sim/m32r/ChangeLog
+++ b/sim/m32r/ChangeLog
@@ -1,3 +1,9 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* sim-if.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/m32r/aclocal.m4 b/sim/m32r/aclocal.m4
index 4fb0bd7..6129398 100644
--- a/sim/m32r/aclocal.m4
+++ b/sim/m32r/aclocal.m4
@@ -112,7 +112,6 @@ m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_cgen_maint.m4])
 m4_include([../m4/sim_ac_option_default_model.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_scache.m4])
diff --git a/sim/m32r/configure b/sim/m32r/configure
index 33f8f39..1f12c92 100755
--- a/sim/m32r/configure
+++ b/sim/m32r/configure
@@ -634,7 +634,6 @@ LIBOBJS
 sim_reserved_bits
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 sim_extra_cflags
 traps_obj
@@ -758,7 +757,6 @@ sim_inline
 sim_hw
 sim_hw_objs
 sim_hw_cflags
-sim_endian
 sim_default_model'
 ac_subst_files=''
 ac_user_opts='
@@ -773,7 +771,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_sim_scache
 enable_sim_default_model
 enable_werror
@@ -1419,8 +1416,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-sim-scache=size
                           Specify simulator execution cache size
   --enable-sim-default-model=model
@@ -10755,7 +10750,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10758 "configure"
+#line 10753 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10861,7 +10856,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10864 "configure"
+#line 10859 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11157,51 +11152,6 @@ fi
 
 
 
-wire_endian="BIG"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
 default_sim_scache="16384"
 # Check whether --enable-sim-scache was given.
 if test "${enable_sim_scache+set}" = set; then :
@@ -11504,8 +11454,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/m32r/configure.ac b/sim/m32r/configure.ac
index a5cea83..9377081 100644
--- a/sim/m32r/configure.ac
+++ b/sim/m32r/configure.ac
@@ -4,7 +4,6 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(BIG)
 SIM_AC_OPTION_SCACHE(16384)
 SIM_AC_OPTION_DEFAULT_MODEL(m32r/d)
 SIM_AC_OPTION_WARNINGS(no)
diff --git a/sim/m32r/sim-if.c b/sim/m32r/sim-if.c
index bea6505..3d8db03 100644
--- a/sim/m32r/sim-if.c
+++ b/sim/m32r/sim-if.c
@@ -56,6 +56,7 @@ sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd,
 
   /* Set default options before parsing user options.  */
   current_alignment = STRICT_ALIGNMENT;
+  current_target_byte_order = BFD_ENDIAN_BIG;
 
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
diff --git a/sim/m4/sim_ac_option_endian.m4 b/sim/m4/sim_ac_option_endian.m4
index e5a5b61..01467a0 100644
--- a/sim/m4/sim_ac_option_endian.m4
+++ b/sim/m4/sim_ac_option_endian.m4
@@ -15,51 +15,20 @@ dnl along with this program.  If not, see <http://www.gnu.org/licenses/>.
 dnl
 dnl --enable-sim-endian={yes,no,big,little} is for simulators
 dnl that support both big and little endian targets.
-dnl arg[1] is hardwired target endianness.
-dnl arg[2] is default target endianness.
 AC_DEFUN([SIM_AC_OPTION_ENDIAN],
-[
-wire_endian="[$1]"
-default_endian="[$2]"
+[dnl
+AC_MSG_CHECKING([whether to force sim endianness])
+sim_endian=
 AC_ARG_ENABLE(sim-endian,
 [AS_HELP_STRING([--enable-sim-endian=endian],
 		[Specify target byte endian orientation])],
 [case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 AC_MSG_ERROR("Unknown value $enableval for --enable-sim-endian"); sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi],
-[if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi])dnl
-])
-AC_SUBST(sim_endian)
+  b*|B*) sim_endian="BFD_ENDIAN_BIG";;
+  l*|L*) sim_endian="BFD_ENDIAN_LITTLE";;
+  yes | no) ;;
+  *)	 AC_MSG_ERROR("Unknown value $enableval for --enable-sim-endian");;
+esac])dnl
+AC_DEFINE_UNQUOTED([WITH_TARGET_BYTE_ORDER],
+		   [${sim_endian:-BFD_ENDIAN_UNKNOWN}], [Sim endian settings])
+AC_MSG_RESULT([${sim_alignment:-no}])
+])dnl
diff --git a/sim/m4/sim_ac_output.m4 b/sim/m4/sim_ac_output.m4
index b18f254..db6c3ff 100644
--- a/sim/m4/sim_ac_output.m4
+++ b/sim/m4/sim_ac_output.m4
@@ -48,9 +48,7 @@ AC_CONFIG_COMMANDS([stamp-h], [echo > stamp-h])
 dnl These are unfortunate.  They are conditionally called by other sim macros
 dnl but always used by common/Make-common.in.  So we have to subst here even
 dnl when the rest of the code is in the respective macros.
-AC_SUBST(sim_alignment)
 AC_SUBST(sim_bitsize)
-AC_SUBST(sim_endian)
 AC_SUBST(sim_float)
 AC_SUBST(sim_scache)
 AC_SUBST(sim_default_model)
diff --git a/sim/m68hc11/ChangeLog b/sim/m68hc11/ChangeLog
index 0c1aa11..3b87798 100644
--- a/sim/m68hc11/ChangeLog
+++ b/sim/m68hc11/ChangeLog
@@ -1,5 +1,11 @@
 2021-06-17  Mike Frysinger  <vapier@gentoo.org>
 
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* interp.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
 	* sim-main.h: Delete sim/callback.h include.
 
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
diff --git a/sim/m68hc11/aclocal.m4 b/sim/m68hc11/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/m68hc11/aclocal.m4
+++ b/sim/m68hc11/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/m68hc11/configure b/sim/m68hc11/configure
index fb51974..1ed8c04 100755
--- a/sim/m68hc11/configure
+++ b/sim/m68hc11/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,8 +752,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_sim_hardware
 enable_werror
 enable_build_warnings
@@ -1411,8 +1408,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-sim-hardware=LIST
                           Specify the hardware to be included in the build.
   --enable-werror         treat compile warnings as errors
@@ -10742,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11144,51 +11139,6 @@ fi
 
 
 
-wire_endian="BIG"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
 hardware="cfi core pal glue \
   m68hc11 m68hc11sio m68hc11eepr m68hc11tim m68hc11spi nvram"
 sim_hw_cflags="-DWITH_HW=1"
@@ -11413,8 +11363,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/m68hc11/configure.ac b/sim/m68hc11/configure.ac
index b268504..986d8ad 100644
--- a/sim/m68hc11/configure.ac
+++ b/sim/m68hc11/configure.ac
@@ -5,7 +5,6 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 SIM_AC_COMMON
 
 dnl Options available in this module
-SIM_AC_OPTION_ENDIAN(BIG)
 SIM_AC_OPTION_HARDWARE(\
   m68hc11 m68hc11sio m68hc11eepr m68hc11tim m68hc11spi nvram)
 
diff --git a/sim/m68hc11/interp.c b/sim/m68hc11/interp.c
index d4b2531..7d28f40 100644
--- a/sim/m68hc11/interp.c
+++ b/sim/m68hc11/interp.c
@@ -406,6 +406,9 @@ sim_open (SIM_OPEN_KIND kind, host_callback *callback,
 
   SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
 
+  /* Set default options before parsing user options.  */
+  current_target_byte_order = BFD_ENDIAN_BIG;
+
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
     {
diff --git a/sim/mcore/ChangeLog b/sim/mcore/ChangeLog
index f7abd65..cf7d270 100644
--- a/sim/mcore/ChangeLog
+++ b/sim/mcore/ChangeLog
@@ -1,3 +1,8 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/mcore/aclocal.m4 b/sim/mcore/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/mcore/aclocal.m4
+++ b/sim/mcore/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/mcore/configure b/sim/mcore/configure
index 3a18f37..2c8a6e0 100755
--- a/sim/mcore/configure
+++ b/sim/mcore/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,8 +752,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
@@ -1411,8 +1408,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
   --enable-sim-build-warnings
@@ -10742,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11144,52 +11139,6 @@ fi
 
 
 
-wire_endian=""
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
-
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
   enableval=$enable_werror; case "${enableval}" in
@@ -11412,8 +11361,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/mcore/configure.ac b/sim/mcore/configure.ac
index ec8a87e..08bf6ff 100644
--- a/sim/mcore/configure.ac
+++ b/sim/mcore/configure.ac
@@ -4,6 +4,4 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN
-
 SIM_AC_OUTPUT
diff --git a/sim/microblaze/ChangeLog b/sim/microblaze/ChangeLog
index c253658..5d0224b 100644
--- a/sim/microblaze/ChangeLog
+++ b/sim/microblaze/ChangeLog
@@ -1,3 +1,8 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/microblaze/aclocal.m4 b/sim/microblaze/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/microblaze/aclocal.m4
+++ b/sim/microblaze/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/microblaze/configure b/sim/microblaze/configure
index 3a18f37..2c8a6e0 100755
--- a/sim/microblaze/configure
+++ b/sim/microblaze/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,8 +752,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
@@ -1411,8 +1408,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
   --enable-sim-build-warnings
@@ -10742,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11144,52 +11139,6 @@ fi
 
 
 
-wire_endian=""
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
-
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
   enableval=$enable_werror; case "${enableval}" in
@@ -11412,8 +11361,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/microblaze/configure.ac b/sim/microblaze/configure.ac
index ec8a87e..08bf6ff 100644
--- a/sim/microblaze/configure.ac
+++ b/sim/microblaze/configure.ac
@@ -4,6 +4,4 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN
-
 SIM_AC_OUTPUT
diff --git a/sim/mips/ChangeLog b/sim/mips/ChangeLog
index c582abc..05d6461 100644
--- a/sim/mips/ChangeLog
+++ b/sim/mips/ChangeLog
@@ -1,3 +1,8 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* interp.c (dotrace): Make comment const.
diff --git a/sim/mips/aclocal.m4 b/sim/mips/aclocal.m4
index b61eb2e..cd86d4d 100644
--- a/sim/mips/aclocal.m4
+++ b/sim/mips/aclocal.m4
@@ -111,7 +111,6 @@ m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_bitsize.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_float.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
diff --git a/sim/mips/configure b/sim/mips/configure
index d7fdbf3..55041fd 100755
--- a/sim/mips/configure
+++ b/sim/mips/configure
@@ -633,7 +633,6 @@ ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_default_model
 sim_scache
-sim_alignment
 cgen_breaks
 XMKMF
 sim_multi_obj
@@ -764,7 +763,6 @@ sim_hw
 sim_hw_objs
 sim_hw_cflags
 sim_float
-sim_endian
 sim_bitsize'
 ac_subst_files=''
 ac_user_opts='
@@ -783,7 +781,6 @@ enable_werror
 enable_build_warnings
 enable_sim_build_warnings
 enable_sim_reserved_bits
-enable_sim_endian
 enable_sim_bitsize
 enable_sim_float
 enable_sim_hardware
@@ -1439,8 +1436,6 @@ Optional Features:
   --enable-sim-reserved-bits
                           Specify whether to check reserved bits in
                           instruction
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-sim-bitsize=N  Specify target bitsize (32 or 64)
   --enable-sim-float      Specify that the target processor has floating point
                           hardware
@@ -10770,7 +10765,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10773 "configure"
+#line 10768 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10876,7 +10871,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10879 "configure"
+#line 10874 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11305,69 +11300,6 @@ esac
 
 
 #
-# Select the byte order of the target
-#
-mips_endian=
-default_endian=
-case "${target}" in
-  mips64el*-*-*)        mips_endian=LITTLE ;;
-  mips64vr*el-*-*)      default_endian=LITTLE ;;
-  mips64*-*-*)          default_endian=BIG ;;
-  mips16*-*-*)          default_endian=BIG ;;
-  mipsisa32*-*-*)       default_endian=BIG ;;
-  mipsisa64*-*-*)       default_endian=BIG ;;
-  mips*-*-*)            default_endian=BIG ;;
-  *)                    default_endian=BIG ;;
-esac
-
-wire_endian="$mips_endian"
-default_endian="$default_endian"
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
-
-
-#
 # Select the bitsize of the target
 #
 mips_addr_bitsize=
@@ -12195,8 +12127,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/mips/configure.ac b/sim/mips/configure.ac
index f0b26b4..03d8f51 100644
--- a/sim/mips/configure.ac
+++ b/sim/mips/configure.ac
@@ -28,25 +28,6 @@ AC_SUBST(SIM_SUBTARGET)
 
 
 #
-# Select the byte order of the target
-#
-mips_endian=
-default_endian=
-case "${target}" in
-  mips64el*-*-*)        mips_endian=LITTLE ;;
-  mips64vr*el-*-*)      default_endian=LITTLE ;;
-  mips64*-*-*)          default_endian=BIG ;;
-  mips16*-*-*)          default_endian=BIG ;;
-  mipsisa32*-*-*)       default_endian=BIG ;;
-  mipsisa64*-*-*)       default_endian=BIG ;;
-  mips*-*-*)            default_endian=BIG ;;
-  *)                    default_endian=BIG ;;
-esac
-SIM_AC_OPTION_ENDIAN($mips_endian,$default_endian)
-
-
-
-#
 # Select the bitsize of the target
 #
 mips_addr_bitsize=
diff --git a/sim/mn10300/ChangeLog b/sim/mn10300/ChangeLog
index 0e2c36f..6f6dced 100644
--- a/sim/mn10300/ChangeLog
+++ b/sim/mn10300/ChangeLog
@@ -1,5 +1,11 @@
 2021-06-17  Mike Frysinger  <vapier@gentoo.org>
 
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* interp.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
 	* mn10300_sim.h (u642dw, dw2u64): Change INLINE to INLINE2.
 
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
diff --git a/sim/mn10300/aclocal.m4 b/sim/mn10300/aclocal.m4
index 8121fe6..61a92c9 100644
--- a/sim/mn10300/aclocal.m4
+++ b/sim/mn10300/aclocal.m4
@@ -111,7 +111,6 @@ m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_bitsize.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_reserved_bits.m4])
diff --git a/sim/mn10300/configure b/sim/mn10300/configure
index 4dee9eb..d24ac1d 100755
--- a/sim/mn10300/configure
+++ b/sim/mn10300/configure
@@ -634,7 +634,6 @@ LIBOBJS
 sim_default_model
 sim_scache
 sim_float
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,7 +752,6 @@ sim_inline
 sim_hw
 sim_hw_objs
 sim_hw_cflags
-sim_endian
 sim_bitsize'
 ac_subst_files=''
 ac_user_opts='
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_sim_reserved_bits
 enable_sim_bitsize
 enable_sim_hardware
@@ -1413,8 +1410,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-sim-reserved-bits
                           Specify whether to check reserved bits in
                           instruction
@@ -10748,7 +10743,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10751 "configure"
+#line 10746 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10854,7 +10849,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10857 "configure"
+#line 10852 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11150,51 +11145,6 @@ fi
 
 
 
-wire_endian="LITTLE"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
 default_sim_reserved_bits="1"
 # Check whether --enable-sim-reserved-bits was given.
 if test "${enable_sim_reserved_bits+set}" = set; then :
@@ -11493,8 +11443,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/mn10300/configure.ac b/sim/mn10300/configure.ac
index 6754136..1083c06 100644
--- a/sim/mn10300/configure.ac
+++ b/sim/mn10300/configure.ac
@@ -4,7 +4,6 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(LITTLE)
 SIM_AC_OPTION_RESERVED_BITS
 SIM_AC_OPTION_BITSIZE(32,31)
 SIM_AC_OPTION_HARDWARE(mn103cpu mn103int mn103tim mn103ser mn103iop)
diff --git a/sim/mn10300/interp.c b/sim/mn10300/interp.c
index 541d4b1..b793d3c 100644
--- a/sim/mn10300/interp.c
+++ b/sim/mn10300/interp.c
@@ -94,6 +94,9 @@ sim_open (SIM_OPEN_KIND kind,
 
   SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
 
+  /* Set default options before parsing user options.  */
+  current_target_byte_order = BFD_ENDIAN_LITTLE;
+
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
     return 0;
diff --git a/sim/moxie/ChangeLog b/sim/moxie/ChangeLog
index bc15793..a0f5ccc 100644
--- a/sim/moxie/ChangeLog
+++ b/sim/moxie/ChangeLog
@@ -1,3 +1,9 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* interp.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/moxie/aclocal.m4 b/sim/moxie/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/moxie/aclocal.m4
+++ b/sim/moxie/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/moxie/configure b/sim/moxie/configure
index 6fa5b49..26ccbb3 100755
--- a/sim/moxie/configure
+++ b/sim/moxie/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 DTC
 MAINT
@@ -754,8 +753,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -769,7 +767,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
@@ -1412,8 +1409,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
   --enable-sim-build-warnings
@@ -10743,7 +10738,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10746 "configure"
+#line 10741 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10849,7 +10844,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10852 "configure"
+#line 10847 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11238,52 +11233,6 @@ fi
 
 
 
-wire_endian="BIG"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
-
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
   enableval=$enable_werror; case "${enableval}" in
@@ -11506,8 +11455,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/moxie/configure.ac b/sim/moxie/configure.ac
index 75a6f37..c7475b7 100644
--- a/sim/moxie/configure.ac
+++ b/sim/moxie/configure.ac
@@ -6,6 +6,4 @@ SIM_AC_COMMON
 
 AC_CHECK_TOOL(DTC, dtc)
 
-SIM_AC_OPTION_ENDIAN(BIG)
-
 SIM_AC_OUTPUT
diff --git a/sim/moxie/interp.c b/sim/moxie/interp.c
index caf9e43..c70215f 100644
--- a/sim/moxie/interp.c
+++ b/sim/moxie/interp.c
@@ -1198,6 +1198,9 @@ sim_open (SIM_OPEN_KIND kind, host_callback *cb,
   SIM_DESC sd = sim_state_alloc (kind, cb);
   SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
 
+  /* Set default options before parsing user options.  */
+  current_target_byte_order = BFD_ENDIAN_BIG;
+
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
     {
diff --git a/sim/msp430/ChangeLog b/sim/msp430/ChangeLog
index 092a4f7..a78d476 100644
--- a/sim/msp430/ChangeLog
+++ b/sim/msp430/ChangeLog
@@ -1,3 +1,9 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* msp430-sim.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/msp430/aclocal.m4 b/sim/msp430/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/msp430/aclocal.m4
+++ b/sim/msp430/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/msp430/configure b/sim/msp430/configure
index 9999079..2c8a6e0 100755
--- a/sim/msp430/configure
+++ b/sim/msp430/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,8 +752,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
@@ -1411,8 +1408,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
   --enable-sim-build-warnings
@@ -10742,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11144,52 +11139,6 @@ fi
 
 
 
-wire_endian="LITTLE"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
-
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
   enableval=$enable_werror; case "${enableval}" in
@@ -11412,8 +11361,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/msp430/configure.ac b/sim/msp430/configure.ac
index 9cab542..4f2c0ac 100644
--- a/sim/msp430/configure.ac
+++ b/sim/msp430/configure.ac
@@ -23,6 +23,4 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(LITTLE)
-
 SIM_AC_OUTPUT
diff --git a/sim/msp430/msp430-sim.c b/sim/msp430/msp430-sim.c
index 58a5469..ed03933 100644
--- a/sim/msp430/msp430-sim.c
+++ b/sim/msp430/msp430-sim.c
@@ -112,6 +112,9 @@ sim_open (SIM_OPEN_KIND kind,
 
   /* Initialise the simulator.  */
 
+  /* Set default options before parsing user options.  */
+  current_target_byte_order = BFD_ENDIAN_LITTLE;
+
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
     {
       sim_state_free (sd);
diff --git a/sim/or1k/ChangeLog b/sim/or1k/ChangeLog
index b163a58..4140fd6 100644
--- a/sim/or1k/ChangeLog
+++ b/sim/or1k/ChangeLog
@@ -1,3 +1,9 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* sim-if.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/or1k/aclocal.m4 b/sim/or1k/aclocal.m4
index 8298e1f..d3a5693 100644
--- a/sim/or1k/aclocal.m4
+++ b/sim/or1k/aclocal.m4
@@ -113,7 +113,6 @@ m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_bitsize.m4])
 m4_include([../m4/sim_ac_option_cgen_maint.m4])
 m4_include([../m4/sim_ac_option_default_model.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_scache.m4])
diff --git a/sim/or1k/configure b/sim/or1k/configure
index 1d772d6..d736624 100755
--- a/sim/or1k/configure
+++ b/sim/or1k/configure
@@ -633,7 +633,6 @@ ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
 sim_float
-sim_alignment
 cgen_breaks
 cgen
 cgendir
@@ -755,7 +754,6 @@ sim_inline
 sim_hw
 sim_hw_objs
 sim_hw_cflags
-sim_endian
 sim_default_model
 sim_bitsize'
 ac_subst_files=''
@@ -771,7 +769,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_sim_bitsize
 enable_sim_scache
 enable_sim_default_model
@@ -1418,8 +1415,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-sim-bitsize=N  Specify target bitsize (32 or 64)
   --enable-sim-scache=size
                           Specify simulator execution cache size
@@ -10755,7 +10750,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10758 "configure"
+#line 10753 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10861,7 +10856,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10864 "configure"
+#line 10859 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11156,51 +11151,6 @@ fi
 
 
 
-
-wire_endian="BIG"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
 wire_word_bitsize="32"
 wire_word_msb="31"
 wire_address_bitsize="32"
@@ -11549,8 +11499,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/or1k/configure.ac b/sim/or1k/configure.ac
index e09fee1..ed8538e 100644
--- a/sim/or1k/configure.ac
+++ b/sim/or1k/configure.ac
@@ -4,7 +4,6 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(BIG)
 SIM_AC_OPTION_BITSIZE([32], [31], [32])
 SIM_AC_OPTION_SCACHE(16384)
 SIM_AC_OPTION_DEFAULT_MODEL([or1200])
diff --git a/sim/or1k/sim-if.c b/sim/or1k/sim-if.c
index e6342ee..06d7dcb 100644
--- a/sim/or1k/sim-if.c
+++ b/sim/or1k/sim-if.c
@@ -160,6 +160,9 @@ sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd,
   char c;
   int i;
 
+  /* Set default options before parsing user options.  */
+  current_target_byte_order = BFD_ENDIAN_BIG;
+
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
     {
diff --git a/sim/ppc/ChangeLog b/sim/ppc/ChangeLog
index 280234a..fc3f62f 100644
--- a/sim/ppc/ChangeLog
+++ b/sim/ppc/ChangeLog
@@ -1,5 +1,11 @@
 2021-06-17  Mike Frysinger  <vapier@gentoo.org>
 
+	* Makefile.in (ENDIAN_CFLAGS): Delete.
+	* configure.ac: Delete sim-endian.
+	* configure: Regenerate.
+
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
 	* igen.c (gen_semantics_h): Rename PAGE_SIZE to MPC860C0_PAGE_SIZE.
 	* ppc-instructions: Likewise.
 
diff --git a/sim/ppc/Makefile.in b/sim/ppc/Makefile.in
index c1135a3..4446922 100644
--- a/sim/ppc/Makefile.in
+++ b/sim/ppc/Makefile.in
@@ -72,7 +72,6 @@ MAKEINFO = makeinfo
 RANLIB = @RANLIB@
 
 INLINE_CFLAGS = @sim_inline@
-ENDIAN_CFLAGS = @sim_endian@
 SMP_CFLAGS = @sim_smp@
 XOR_ENDIAN_CFLAGS = @sim_xor_endian@
 BITSIZE_CFLAGS = @sim_bitsize@
@@ -86,7 +85,6 @@ TERMIO_CFLAGS = @sim_termio@
 WARNING_CFLAGS = @sim_warnings@
 DEVZERO_CFLAGS = @sim_devzero@
 CONFIG_CFLAGS = \
-  $(ENDIAN_CFLAGS) \
   $(SMP_CFLAGS) \
   $(XOR_ENDIAN_CFLAGS) \
   $(BITSIZE_CFLAGS) \
diff --git a/sim/ppc/configure b/sim/ppc/configure
index 7927bed..930b24a 100755
--- a/sim/ppc/configure
+++ b/sim/ppc/configure
@@ -639,7 +639,6 @@ sim_bitsize
 sim_igen_smp
 sim_smp
 sim_xor_endian
-sim_endian
 sim_inline
 sim_pk_obj
 sim_pk_src
@@ -745,7 +744,6 @@ enable_sim_config
 enable_sim_decode_mechanism
 enable_sim_default_model
 enable_sim_duplicate
-enable_sim_endian
 enable_sim_filter
 enable_sim_float
 enable_sim_hardware
@@ -1400,7 +1398,6 @@ Optional Features:
   --enable-sim-decode-mechanism=which		Specify the instruction decode mechanism.
   --enable-sim-default-model=which	Specify default PowerPC to model.
   --enable-sim-duplicate		Expand (duplicate) semantic functions.
-  --enable-sim-endian=endian		Specify target byte endian orientation.
   --enable-sim-filter=rule		Specify filter rules.
   --enable-sim-float			Specify whether the target has hard, soft, altivec or e500 floating point.
   --enable-sim-hardware=list		Specify the hardware to be included in the build.
@@ -3201,27 +3198,6 @@ fi
 fi
 
 
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  yes)	case "$target" in
-	  *powerpc-*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-	  *powerpcle-*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-	  *) echo "Unknown target $target" 1>&6; sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN";;
-	esac;;
-  no)	 sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN";;
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  sim_endian=""
-fi
-
-
 # Check whether --enable-sim-filter was given.
 if test "${enable_sim_filter+set}" = set; then :
   enableval=$enable_sim_filter; case "${enableval}" in
@@ -4882,7 +4858,6 @@ fi
 
 
 
-
 ac_config_files="$ac_config_files Makefile"
 
 ac_config_commands="$ac_config_commands default"
diff --git a/sim/ppc/configure.ac b/sim/ppc/configure.ac
index 5867f60..9d294ae 100644
--- a/sim/ppc/configure.ac
+++ b/sim/ppc/configure.ac
@@ -93,24 +93,6 @@ if test x"$silent" != x"yes"; then
 fi])dnl
 
 
-AC_ARG_ENABLE(sim-endian,
-[  --enable-sim-endian=endian		Specify target byte endian orientation.],
-[case "${enableval}" in
-  yes)	case "$target" in
-	  *powerpc-*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-	  *powerpcle-*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-	  *) echo "Unknown target $target" 1>&6; sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN";;
-	esac;;
-  no)	 sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN";;
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  *)	 AC_MSG_ERROR("Unknown value $enableval for --enable-sim-endian"); sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi],[sim_endian=""])dnl
-
-
 AC_ARG_ENABLE(sim-filter,
 [  --enable-sim-filter=rule		Specify filter rules.],
 [case "${enableval}" in
@@ -758,7 +740,6 @@ AC_SUBST(sim_hw_obj)
 AC_SUBST(sim_pk_src)
 AC_SUBST(sim_pk_obj)
 AC_SUBST(sim_inline)
-AC_SUBST(sim_endian)
 AC_SUBST(sim_xor_endian)
 AC_SUBST(sim_smp)
 AC_SUBST(sim_igen_smp)
diff --git a/sim/pru/ChangeLog b/sim/pru/ChangeLog
index 4a91a33..81033cf 100644
--- a/sim/pru/ChangeLog
+++ b/sim/pru/ChangeLog
@@ -1,3 +1,9 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* interp.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/pru/aclocal.m4 b/sim/pru/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/pru/aclocal.m4
+++ b/sim/pru/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/pru/configure b/sim/pru/configure
index 9999079..2c8a6e0 100755
--- a/sim/pru/configure
+++ b/sim/pru/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,8 +752,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
@@ -1411,8 +1408,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
   --enable-sim-build-warnings
@@ -10742,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11144,52 +11139,6 @@ fi
 
 
 
-wire_endian="LITTLE"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
-
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
   enableval=$enable_werror; case "${enableval}" in
@@ -11412,8 +11361,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/pru/configure.ac b/sim/pru/configure.ac
index 1846b26..8e9577c 100644
--- a/sim/pru/configure.ac
+++ b/sim/pru/configure.ac
@@ -23,6 +23,4 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(LITTLE)
-
 SIM_AC_OUTPUT
diff --git a/sim/pru/interp.c b/sim/pru/interp.c
index 38269df..09045dc 100644
--- a/sim/pru/interp.c
+++ b/sim/pru/interp.c
@@ -747,6 +747,7 @@ sim_open (SIM_OPEN_KIND kind, host_callback *cb,
 
   /* Set default options before parsing user options.  */
   current_alignment = STRICT_ALIGNMENT;
+  current_target_byte_order = BFD_ENDIAN_LITTLE;
 
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
diff --git a/sim/riscv/ChangeLog b/sim/riscv/ChangeLog
index bbbd8de..5c7973f 100644
--- a/sim/riscv/ChangeLog
+++ b/sim/riscv/ChangeLog
@@ -1,3 +1,9 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* interp.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/riscv/aclocal.m4 b/sim/riscv/aclocal.m4
index 6677e0f..5aa3640 100644
--- a/sim/riscv/aclocal.m4
+++ b/sim/riscv/aclocal.m4
@@ -112,7 +112,6 @@ m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_bitsize.m4])
 m4_include([../m4/sim_ac_option_default_model.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/riscv/configure b/sim/riscv/configure
index aa123f5..cdbedcc 100755
--- a/sim/riscv/configure
+++ b/sim/riscv/configure
@@ -634,7 +634,6 @@ LIBOBJS
 sim_reserved_bits
 sim_scache
 sim_float
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -752,7 +751,6 @@ sim_inline
 sim_hw
 sim_hw_objs
 sim_hw_cflags
-sim_endian
 sim_default_model
 sim_bitsize'
 ac_subst_files=''
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_sim_default_model
 enable_sim_bitsize
 enable_werror
@@ -1413,8 +1410,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-sim-default-model=model
                           Specify default model to simulate
   --enable-sim-bitsize=N  Specify target bitsize (32 or 64)
@@ -10747,7 +10742,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10750 "configure"
+#line 10745 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10853,7 +10848,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10856 "configure"
+#line 10851 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11148,52 +11143,6 @@ fi
 
 
 
-
-wire_endian="LITTLE"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
 # Select the default model for the target.
 riscv_model=
 case "${target}" in
@@ -11506,8 +11455,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/riscv/configure.ac b/sim/riscv/configure.ac
index 421b5ba..e866c8f 100644
--- a/sim/riscv/configure.ac
+++ b/sim/riscv/configure.ac
@@ -4,8 +4,6 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(LITTLE)
-
 # Select the default model for the target.
 riscv_model=
 case "${target}" in
diff --git a/sim/riscv/interp.c b/sim/riscv/interp.c
index f3754da..8b96677 100644
--- a/sim/riscv/interp.c
+++ b/sim/riscv/interp.c
@@ -62,6 +62,9 @@ sim_open (SIM_OPEN_KIND kind, host_callback *callback,
   SIM_DESC sd = sim_state_alloc_extra (kind, callback,
 				       sizeof (struct riscv_sim_state));
 
+  /* Set default options before parsing user options.  */
+  current_target_byte_order = BFD_ENDIAN_LITTLE;
+
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
     {
diff --git a/sim/rl78/ChangeLog b/sim/rl78/ChangeLog
index 7a1976c..a2e2cfb 100644
--- a/sim/rl78/ChangeLog
+++ b/sim/rl78/ChangeLog
@@ -1,3 +1,7 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/rl78/configure b/sim/rl78/configure
index 571fdbc..2c8a6e0 100755
--- a/sim/rl78/configure
+++ b/sim/rl78/configure
@@ -635,9 +635,7 @@ sim_reserved_bits
 sim_default_model
 sim_scache
 sim_float
-sim_endian
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -10739,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10742 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10845,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10848 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11363,8 +11361,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/rx/ChangeLog b/sim/rx/ChangeLog
index 76b61b0..0b3cbc6 100644
--- a/sim/rx/ChangeLog
+++ b/sim/rx/ChangeLog
@@ -1,3 +1,7 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/rx/configure b/sim/rx/configure
index 1e9f11a..7200bcb 100755
--- a/sim/rx/configure
+++ b/sim/rx/configure
@@ -635,9 +635,7 @@ sim_reserved_bits
 sim_default_model
 sim_scache
 sim_float
-sim_endian
 sim_bitsize
-sim_alignment
 cgen_breaks
 sim_cycle_accurate_flags
 MAINT
@@ -10743,7 +10741,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10746 "configure"
+#line 10744 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10849,7 +10847,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10852 "configure"
+#line 10850 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11383,8 +11381,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/sh/ChangeLog b/sim/sh/ChangeLog
index 9bd6b85..950fe1a 100644
--- a/sim/sh/ChangeLog
+++ b/sim/sh/ChangeLog
@@ -1,3 +1,8 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/sh/aclocal.m4 b/sim/sh/aclocal.m4
index 88b04d1..f5eee94 100644
--- a/sim/sh/aclocal.m4
+++ b/sim/sh/aclocal.m4
@@ -110,7 +110,6 @@ m4_include([../../ltsugar.m4])
 m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/sh/configure b/sim/sh/configure
index 00e0b88..661ad09 100755
--- a/sim/sh/configure
+++ b/sim/sh/configure
@@ -636,7 +636,6 @@ sim_default_model
 sim_scache
 sim_float
 sim_bitsize
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,8 +752,7 @@ WARN_CFLAGS
 sim_inline
 sim_hw
 sim_hw_objs
-sim_hw_cflags
-sim_endian'
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
@@ -1411,8 +1408,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings if gcc is used
   --enable-sim-build-warnings
@@ -10742,7 +10737,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10745 "configure"
+#line 10740 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10848,7 +10843,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10851 "configure"
+#line 10846 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11144,51 +11139,6 @@ fi
 
 
 
-wire_endian=""
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
 # Check whether --enable-werror was given.
 if test "${enable_werror+set}" = set; then :
   enableval=$enable_werror; case "${enableval}" in
@@ -11409,8 +11359,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/sh/configure.ac b/sim/sh/configure.ac
index dd975d3..9bf4a40 100644
--- a/sim/sh/configure.ac
+++ b/sim/sh/configure.ac
@@ -4,7 +4,6 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN
 SIM_AC_OPTION_WARNINGS(no)
 
 SIM_AC_OUTPUT
diff --git a/sim/v850/ChangeLog b/sim/v850/ChangeLog
index 304ec61..2af2fc25 100644
--- a/sim/v850/ChangeLog
+++ b/sim/v850/ChangeLog
@@ -1,3 +1,9 @@
+2021-06-17  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Delete SIM_AC_OPTION_ENDIAN call.
+	* interp.c (sim_open): Set current_target_byte_order.
+	* aclocal.m4, configure: Regenerate.
+
 2021-06-16  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure: Regenerate.
diff --git a/sim/v850/aclocal.m4 b/sim/v850/aclocal.m4
index 8121fe6..61a92c9 100644
--- a/sim/v850/aclocal.m4
+++ b/sim/v850/aclocal.m4
@@ -111,7 +111,6 @@ m4_include([../../ltversion.m4])
 m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_bitsize.m4])
-m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_hardware.m4])
 m4_include([../m4/sim_ac_option_inline.m4])
 m4_include([../m4/sim_ac_option_reserved_bits.m4])
diff --git a/sim/v850/configure b/sim/v850/configure
index 28471bf..9f83ff1 100755
--- a/sim/v850/configure
+++ b/sim/v850/configure
@@ -634,7 +634,6 @@ LIBOBJS
 sim_default_model
 sim_scache
 sim_float
-sim_alignment
 cgen_breaks
 MAINT
 MAINTAINER_MODE_FALSE
@@ -753,7 +752,6 @@ sim_inline
 sim_hw
 sim_hw_objs
 sim_hw_cflags
-sim_endian
 sim_bitsize'
 ac_subst_files=''
 ac_user_opts='
@@ -768,7 +766,6 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_sim_inline
-enable_sim_endian
 enable_sim_reserved_bits
 enable_sim_bitsize
 enable_werror
@@ -1413,8 +1410,6 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-sim-inline=inlines
                           Specify which functions should be inlined
-  --enable-sim-endian=endian
-                          Specify target byte endian orientation
   --enable-sim-reserved-bits
                           Specify whether to check reserved bits in
                           instruction
@@ -10748,7 +10743,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10751 "configure"
+#line 10746 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10854,7 +10849,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10857 "configure"
+#line 10852 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11150,51 +11145,6 @@ fi
 
 
 
-wire_endian="LITTLE"
-default_endian=""
-# Check whether --enable-sim-endian was given.
-if test "${enable_sim_endian+set}" = set; then :
-  enableval=$enable_sim_endian; case "${enableval}" in
-  b*|B*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_BIG";;
-  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_LITTLE";;
-  yes)	 if test x"$wire_endian" != x; then
-	   sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	 else
-	  if test x"$default_endian" != x; then
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	   else
-	     echo "No hard-wired endian for target $target" 1>&6
-	     sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  no)	 if test x"$default_endian" != x; then
-	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-	 else
-	   if test x"$wire_endian" != x; then
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-	   else
-	     echo "No default endian for target $target" 1>&6
-	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_UNKNOWN"
-	   fi
-	 fi;;
-  *)	 as_fn_error $? "\"Unknown value $enableval for --enable-sim-endian\"" "$LINENO" 5; sim_endian="";;
-esac
-if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
-  echo "Setting endian flags = $sim_endian" 6>&1
-fi
-else
-  if test x"$default_endian" != x; then
-  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=BFD_ENDIAN_${default_endian}"
-else
-  if test x"$wire_endian" != x; then
-    sim_endian="-DWITH_TARGET_BYTE_ORDER=BFD_ENDIAN_${wire_endian}"
-  else
-    sim_endian=
-  fi
-fi
-fi
-
-
 default_sim_reserved_bits="1"
 # Check whether --enable-sim-reserved-bits was given.
 if test "${enable_sim_reserved_bits+set}" = set; then :
@@ -11493,8 +11443,6 @@ ac_config_commands="$ac_config_commands stamp-h"
 
 
 
-
-
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure
diff --git a/sim/v850/configure.ac b/sim/v850/configure.ac
index 6d586f1..c3cd646 100644
--- a/sim/v850/configure.ac
+++ b/sim/v850/configure.ac
@@ -4,7 +4,6 @@ AC_CONFIG_MACRO_DIRS([../m4 ../.. ../../config])
 
 SIM_AC_COMMON
 
-SIM_AC_OPTION_ENDIAN(LITTLE)
 SIM_AC_OPTION_RESERVED_BITS
 SIM_AC_OPTION_BITSIZE(32,31)
 
diff --git a/sim/v850/interp.c b/sim/v850/interp.c
index 79c6e0f..92c80a8 100644
--- a/sim/v850/interp.c
+++ b/sim/v850/interp.c
@@ -197,6 +197,9 @@ sim_open (SIM_OPEN_KIND    kind,
 
   SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
 
+  /* Set default options before parsing user options.  */
+  current_target_byte_order = BFD_ENDIAN_LITTLE;
+
   /* The cpu data is kept in a separately allocated chunk of memory.  */
   if (sim_cpu_alloc_all (sd, 1) != SIM_RC_OK)
     return 0;