sim: enable hardware support by default

Force this on for all ports.  We have a few common models that can
be used, so make them generally available.  If the port doesn't use
any hardware (the default), then behavior is unchanged.

96 files changed, 2659 insertions, 120 deletions

diff --git a/sim/ChangeLog b/sim/ChangeLog
index fdeed7d..51ca492 100644
--- a/sim/ChangeLog
+++ b/sim/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* m4/sim_ac_output.m4 (SIM_AC_OUTPUT): Require SIM_AC_OPTION_HARDWARE.
+
 2021-04-23  Mike Frysinger  <vapier@gentoo.org>
 
 	* README-HACKING (SIM_AC_OPTION_HARDWARE): Delete first two args.
diff --git a/sim/aarch64/ChangeLog b/sim/aarch64/ChangeLog
index 30257c2..23736d6 100644
--- a/sim/aarch64/ChangeLog
+++ b/sim/aarch64/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/aarch64/aclocal.m4 b/sim/aarch64/aclocal.m4
index ddeb1f5..4300d0e 100644
--- a/sim/aarch64/aclocal.m4
+++ b/sim/aarch64/aclocal.m4
@@ -115,6 +115,7 @@ m4_include([../m4/sim_ac_option_alignment.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/aarch64/config.in b/sim/aarch64/config.in
index 2416b7f..8d37b72 100644
--- a/sim/aarch64/config.in
+++ b/sim/aarch64/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/aarch64/configure b/sim/aarch64/configure
index 22d4678..1d6a498 100755
--- a/sim/aarch64/configure
+++ b/sim/aarch64/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -757,6 +754,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_alignment'
 ac_subst_files=''
@@ -785,6 +785,7 @@ enable_sim_alignment
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1444,6 +1445,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11183,7 +11186,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11186 "configure"
+#line 11189 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11289,7 +11292,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11292 "configure"
+#line 11295 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12034,6 +12037,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/arm/ChangeLog b/sim/arm/ChangeLog
index fbd977c..c466deb 100644
--- a/sim/arm/ChangeLog
+++ b/sim/arm/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-26  Nick Clifton  <nickc@redhat.com>
 
 	PR 22790
diff --git a/sim/arm/aclocal.m4 b/sim/arm/aclocal.m4
index ddeb1f5..4300d0e 100644
--- a/sim/arm/aclocal.m4
+++ b/sim/arm/aclocal.m4
@@ -115,6 +115,7 @@ m4_include([../m4/sim_ac_option_alignment.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/arm/config.in b/sim/arm/config.in
index 2416b7f..8d37b72 100644
--- a/sim/arm/config.in
+++ b/sim/arm/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/arm/configure b/sim/arm/configure
index 2a74bb7..8cabf92 100755
--- a/sim/arm/configure
+++ b/sim/arm/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -757,6 +754,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_alignment'
 ac_subst_files=''
@@ -785,6 +785,7 @@ enable_sim_alignment
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1444,6 +1445,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11183,7 +11186,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11186 "configure"
+#line 11189 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11289,7 +11292,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11292 "configure"
+#line 11295 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12030,6 +12033,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/avr/ChangeLog b/sim/avr/ChangeLog
index c8f51eb..9c53284 100644
--- a/sim/avr/ChangeLog
+++ b/sim/avr/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/avr/aclocal.m4 b/sim/avr/aclocal.m4
index ddeb1f5..4300d0e 100644
--- a/sim/avr/aclocal.m4
+++ b/sim/avr/aclocal.m4
@@ -115,6 +115,7 @@ m4_include([../m4/sim_ac_option_alignment.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/avr/config.in b/sim/avr/config.in
index 2416b7f..8d37b72 100644
--- a/sim/avr/config.in
+++ b/sim/avr/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/avr/configure b/sim/avr/configure
index ae50e46..5c43b29 100755
--- a/sim/avr/configure
+++ b/sim/avr/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -757,6 +754,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_alignment'
 ac_subst_files=''
@@ -785,6 +785,7 @@ enable_sim_alignment
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1444,6 +1445,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11183,7 +11186,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11186 "configure"
+#line 11189 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11289,7 +11292,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11292 "configure"
+#line 11295 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12030,6 +12033,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/bpf/ChangeLog b/sim/bpf/ChangeLog
index 9021585..e5e2231 100644
--- a/sim/bpf/ChangeLog
+++ b/sim/bpf/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/bpf/aclocal.m4 b/sim/bpf/aclocal.m4
index 73a795c..e1659b4 100644
--- a/sim/bpf/aclocal.m4
+++ b/sim/bpf/aclocal.m4
@@ -118,6 +118,7 @@ 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_environment.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])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/bpf/config.in b/sim/bpf/config.in
index 2416b7f..8d37b72 100644
--- a/sim/bpf/config.in
+++ b/sim/bpf/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/bpf/configure b/sim/bpf/configure
index 31e7c82..32b4a77 100755
--- a/sim/bpf/configure
+++ b/sim/bpf/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_float
 cgen_breaks
 cgen
@@ -758,6 +755,9 @@ WERROR_CFLAGS
 WARN_CFLAGS
 sim_scache
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_default_model
 sim_bitsize
@@ -792,6 +792,7 @@ enable_werror
 enable_build_warnings
 enable_sim_build_warnings
 enable_cgen_maint
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1457,6 +1458,8 @@ Optional Features:
                           enable SIM specific build-time compiler warnings if
                           gcc is used
   --enable-cgen-maint=DIR build cgen generated files
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11196,7 +11199,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11199 "configure"
+#line 11202 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11302,7 +11305,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11305 "configure"
+#line 11308 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12167,6 +12170,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/cr16/ChangeLog b/sim/cr16/ChangeLog
index 4be46d6..2540c37 100644
--- a/sim/cr16/ChangeLog
+++ b/sim/cr16/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* simops.c: Update includes.
diff --git a/sim/cr16/aclocal.m4 b/sim/cr16/aclocal.m4
index ddeb1f5..4300d0e 100644
--- a/sim/cr16/aclocal.m4
+++ b/sim/cr16/aclocal.m4
@@ -115,6 +115,7 @@ m4_include([../m4/sim_ac_option_alignment.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/cr16/config.in b/sim/cr16/config.in
index 2416b7f..8d37b72 100644
--- a/sim/cr16/config.in
+++ b/sim/cr16/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/cr16/configure b/sim/cr16/configure
index f0cfde9..b0d92ce 100755
--- a/sim/cr16/configure
+++ b/sim/cr16/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -757,6 +754,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_alignment'
 ac_subst_files=''
@@ -785,6 +785,7 @@ enable_sim_alignment
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1444,6 +1445,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11183,7 +11186,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11186 "configure"
+#line 11189 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11289,7 +11292,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11292 "configure"
+#line 11295 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12030,6 +12033,107 @@ $as_echo "${WARN_CFLAGS} ${WERROR_CFLAGS}" >&6; }
 fi
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/d10v/ChangeLog b/sim/d10v/ChangeLog
index 22d1e8f..9945be4 100644
--- a/sim/d10v/ChangeLog
+++ b/sim/d10v/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/d10v/aclocal.m4 b/sim/d10v/aclocal.m4
index ddeb1f5..4300d0e 100644
--- a/sim/d10v/aclocal.m4
+++ b/sim/d10v/aclocal.m4
@@ -115,6 +115,7 @@ m4_include([../m4/sim_ac_option_alignment.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/d10v/config.in b/sim/d10v/config.in
index 2416b7f..8d37b72 100644
--- a/sim/d10v/config.in
+++ b/sim/d10v/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/d10v/configure b/sim/d10v/configure
index c02a02b..3daef52 100755
--- a/sim/d10v/configure
+++ b/sim/d10v/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -757,6 +754,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_alignment'
 ac_subst_files=''
@@ -785,6 +785,7 @@ enable_sim_alignment
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1444,6 +1445,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11183,7 +11186,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11186 "configure"
+#line 11189 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11289,7 +11292,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11292 "configure"
+#line 11295 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12030,6 +12033,107 @@ $as_echo "${WARN_CFLAGS} ${WERROR_CFLAGS}" >&6; }
 fi
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/erc32/ChangeLog b/sim/erc32/ChangeLog
index 0a7d033..a6d1cad 100644
--- a/sim/erc32/ChangeLog
+++ b/sim/erc32/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/erc32/aclocal.m4 b/sim/erc32/aclocal.m4
index db8c5cd..ed05269 100644
--- a/sim/erc32/aclocal.m4
+++ b/sim/erc32/aclocal.m4
@@ -113,6 +113,7 @@ m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/erc32/config.in b/sim/erc32/config.in
index 2416b7f..8d37b72 100644
--- a/sim/erc32/config.in
+++ b/sim/erc32/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/erc32/configure b/sim/erc32/configure
index eab6d86..a884ee7 100755
--- a/sim/erc32/configure
+++ b/sim/erc32/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -761,7 +758,10 @@ PATH_SEPARATOR
 SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
-sim_inline'
+sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -786,6 +786,7 @@ with_bugurl
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1440,6 +1441,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11179,7 +11182,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11182 "configure"
+#line 11185 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11285,7 +11288,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11288 "configure"
+#line 11291 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12072,6 +12075,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/example-synacor/ChangeLog b/sim/example-synacor/ChangeLog
index a5c868b..8865093 100644
--- a/sim/example-synacor/ChangeLog
+++ b/sim/example-synacor/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/example-synacor/aclocal.m4 b/sim/example-synacor/aclocal.m4
index ddeb1f5..4300d0e 100644
--- a/sim/example-synacor/aclocal.m4
+++ b/sim/example-synacor/aclocal.m4
@@ -115,6 +115,7 @@ m4_include([../m4/sim_ac_option_alignment.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/example-synacor/config.in b/sim/example-synacor/config.in
index 2416b7f..8d37b72 100644
--- a/sim/example-synacor/config.in
+++ b/sim/example-synacor/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/example-synacor/configure b/sim/example-synacor/configure
index 7fab5fa..a5938be 100755
--- a/sim/example-synacor/configure
+++ b/sim/example-synacor/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -757,6 +754,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_alignment'
 ac_subst_files=''
@@ -785,6 +785,7 @@ enable_sim_alignment
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1444,6 +1445,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11183,7 +11186,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11186 "configure"
+#line 11189 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11289,7 +11292,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11292 "configure"
+#line 11295 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12030,6 +12033,107 @@ $as_echo "${WARN_CFLAGS} ${WERROR_CFLAGS}" >&6; }
 fi
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/frv/ChangeLog b/sim/frv/ChangeLog
index bc981ac..6452399 100644
--- a/sim/frv/ChangeLog
+++ b/sim/frv/ChangeLog
@@ -1,3 +1,8 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac (SIM_AC_OPTION_HARDWARE): Delete call.
+	* configure: Regenerate.
+
 2021-04-23  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure.ac (SIM_AC_OPTION_HARDWARE): Delete arguments.
diff --git a/sim/frv/configure b/sim/frv/configure
index 30c7c81..921f622 100755
--- a/sim/frv/configure
+++ b/sim/frv/configure
@@ -12231,7 +12231,6 @@ fi
 fi
 
 
-
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/frv/configure.ac b/sim/frv/configure.ac
index 6588fe5..e5bbdbf 100644
--- a/sim/frv/configure.ac
+++ b/sim/frv/configure.ac
@@ -27,6 +27,4 @@ if test x"$silent" != x"yes" && test x"$sim_trapdump" != x""; then
 fi],[sim_trapdump=""])dnl
 AC_SUBST(sim_trapdump)
 
-SIM_AC_OPTION_HARDWARE
-
 SIM_AC_OUTPUT
diff --git a/sim/ft32/ChangeLog b/sim/ft32/ChangeLog
index 0a06ef3..6a26436 100644
--- a/sim/ft32/ChangeLog
+++ b/sim/ft32/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/ft32/aclocal.m4 b/sim/ft32/aclocal.m4
index ddeb1f5..4300d0e 100644
--- a/sim/ft32/aclocal.m4
+++ b/sim/ft32/aclocal.m4
@@ -115,6 +115,7 @@ m4_include([../m4/sim_ac_option_alignment.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/ft32/config.in b/sim/ft32/config.in
index 2416b7f..8d37b72 100644
--- a/sim/ft32/config.in
+++ b/sim/ft32/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/ft32/configure b/sim/ft32/configure
index 2f14e5a..d80f8f8 100755
--- a/sim/ft32/configure
+++ b/sim/ft32/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -757,6 +754,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_alignment'
 ac_subst_files=''
@@ -785,6 +785,7 @@ enable_sim_alignment
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1444,6 +1445,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11183,7 +11186,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11186 "configure"
+#line 11189 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11289,7 +11292,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11292 "configure"
+#line 11295 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12030,6 +12033,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/h8300/ChangeLog b/sim/h8300/ChangeLog
index 0a02c9c..c3daaf4 100644
--- a/sim/h8300/ChangeLog
+++ b/sim/h8300/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/h8300/aclocal.m4 b/sim/h8300/aclocal.m4
index ddeb1f5..4300d0e 100644
--- a/sim/h8300/aclocal.m4
+++ b/sim/h8300/aclocal.m4
@@ -115,6 +115,7 @@ m4_include([../m4/sim_ac_option_alignment.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/h8300/config.in b/sim/h8300/config.in
index fbed42a..505aa8c 100644
--- a/sim/h8300/config.in
+++ b/sim/h8300/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/h8300/configure b/sim/h8300/configure
index 682019b..fd7bc25 100755
--- a/sim/h8300/configure
+++ b/sim/h8300/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -757,6 +754,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_alignment'
 ac_subst_files=''
@@ -785,6 +785,7 @@ enable_sim_alignment
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1444,6 +1445,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11184,7 +11187,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11187 "configure"
+#line 11190 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11290,7 +11293,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11293 "configure"
+#line 11296 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12032,6 +12035,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/iq2000/ChangeLog b/sim/iq2000/ChangeLog
index addf3c6..ffb7ab9 100644
--- a/sim/iq2000/ChangeLog
+++ b/sim/iq2000/ChangeLog
@@ -1,3 +1,8 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac (SIM_AC_OPTION_HARDWARE): Delete call.
+	* configure: Regenerate.
+
 2021-04-23  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure.ac (SIM_AC_OPTION_HARDWARE): Delete arguments.
diff --git a/sim/iq2000/configure b/sim/iq2000/configure
index 21b500c..0607bc6 100755
--- a/sim/iq2000/configure
+++ b/sim/iq2000/configure
@@ -12210,7 +12210,6 @@ fi
 fi
 
 
-
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/iq2000/configure.ac b/sim/iq2000/configure.ac
index f21bc80..623fa19 100644
--- a/sim/iq2000/configure.ac
+++ b/sim/iq2000/configure.ac
@@ -11,6 +11,4 @@ SIM_AC_OPTION_DEFAULT_MODEL(iq2000)
 SIM_AC_OPTION_WARNINGS(no)
 SIM_AC_OPTION_CGEN_MAINT
 
-SIM_AC_OPTION_HARDWARE
-
 SIM_AC_OUTPUT
diff --git a/sim/m32c/ChangeLog b/sim/m32c/ChangeLog
index 2919dc4..c2991c6 100644
--- a/sim/m32c/ChangeLog
+++ b/sim/m32c/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/m32c/aclocal.m4 b/sim/m32c/aclocal.m4
index db8c5cd..ed05269 100644
--- a/sim/m32c/aclocal.m4
+++ b/sim/m32c/aclocal.m4
@@ -113,6 +113,7 @@ m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/m32c/config.in b/sim/m32c/config.in
index aaa80a5..3b33610 100644
--- a/sim/m32c/config.in
+++ b/sim/m32c/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/m32c/configure b/sim/m32c/configure
index 2e2ed73..c0fa44f 100755
--- a/sim/m32c/configure
+++ b/sim/m32c/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -758,7 +755,10 @@ PATH_SEPARATOR
 SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
-sim_inline'
+sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -783,6 +783,7 @@ with_bugurl
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1437,6 +1438,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11181,7 +11184,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11184 "configure"
+#line 11187 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11287,7 +11290,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11290 "configure"
+#line 11293 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11946,6 +11949,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/m4/sim_ac_output.m4 b/sim/m4/sim_ac_output.m4
index 9ec566d..b18f254 100644
--- a/sim/m4/sim_ac_output.m4
+++ b/sim/m4/sim_ac_output.m4
@@ -22,6 +22,7 @@ dnl the target's fragment at the appropriate points.
 AC_DEFUN([SIM_AC_OUTPUT],
 [dnl
 AC_REQUIRE([SIM_AC_OPTION_WARNINGS])dnl
+AC_REQUIRE([SIM_AC_OPTION_HARDWARE])dnl
 
 dnl Make @cgen_breaks@ non-null only if the sim uses CGEN.
 cgen_breaks=""
diff --git a/sim/mcore/ChangeLog b/sim/mcore/ChangeLog
index 9e700dc..815cd1a 100644
--- a/sim/mcore/ChangeLog
+++ b/sim/mcore/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/mcore/aclocal.m4 b/sim/mcore/aclocal.m4
index ddeb1f5..4300d0e 100644
--- a/sim/mcore/aclocal.m4
+++ b/sim/mcore/aclocal.m4
@@ -115,6 +115,7 @@ m4_include([../m4/sim_ac_option_alignment.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/mcore/config.in b/sim/mcore/config.in
index 2416b7f..8d37b72 100644
--- a/sim/mcore/config.in
+++ b/sim/mcore/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/mcore/configure b/sim/mcore/configure
index 25f04f5..afd78ba 100755
--- a/sim/mcore/configure
+++ b/sim/mcore/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -757,6 +754,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_alignment'
 ac_subst_files=''
@@ -785,6 +785,7 @@ enable_sim_alignment
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1444,6 +1445,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11183,7 +11186,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11186 "configure"
+#line 11189 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11289,7 +11292,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11292 "configure"
+#line 11295 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12027,6 +12030,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/microblaze/ChangeLog b/sim/microblaze/ChangeLog
index 089c15a..5d6957b 100644
--- a/sim/microblaze/ChangeLog
+++ b/sim/microblaze/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/microblaze/aclocal.m4 b/sim/microblaze/aclocal.m4
index ddeb1f5..4300d0e 100644
--- a/sim/microblaze/aclocal.m4
+++ b/sim/microblaze/aclocal.m4
@@ -115,6 +115,7 @@ m4_include([../m4/sim_ac_option_alignment.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/microblaze/config.in b/sim/microblaze/config.in
index 2416b7f..8d37b72 100644
--- a/sim/microblaze/config.in
+++ b/sim/microblaze/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/microblaze/configure b/sim/microblaze/configure
index 2a74bb7..8cabf92 100755
--- a/sim/microblaze/configure
+++ b/sim/microblaze/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -757,6 +754,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_alignment'
 ac_subst_files=''
@@ -785,6 +785,7 @@ enable_sim_alignment
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1444,6 +1445,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11183,7 +11186,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11186 "configure"
+#line 11189 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11289,7 +11292,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11292 "configure"
+#line 11295 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12030,6 +12033,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/moxie/ChangeLog b/sim/moxie/ChangeLog
index ff2b8eb..3e74d3f 100644
--- a/sim/moxie/ChangeLog
+++ b/sim/moxie/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/moxie/aclocal.m4 b/sim/moxie/aclocal.m4
index ddeb1f5..4300d0e 100644
--- a/sim/moxie/aclocal.m4
+++ b/sim/moxie/aclocal.m4
@@ -115,6 +115,7 @@ m4_include([../m4/sim_ac_option_alignment.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/moxie/config.in b/sim/moxie/config.in
index 2416b7f..8d37b72 100644
--- a/sim/moxie/config.in
+++ b/sim/moxie/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/moxie/configure b/sim/moxie/configure
index 23e04ba..0314c64 100755
--- a/sim/moxie/configure
+++ b/sim/moxie/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -758,6 +755,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_alignment'
 ac_subst_files=''
@@ -786,6 +786,7 @@ enable_sim_alignment
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1445,6 +1446,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11184,7 +11187,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11187 "configure"
+#line 11190 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11290,7 +11293,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11293 "configure"
+#line 11296 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12124,6 +12127,107 @@ $as_echo "${WARN_CFLAGS} ${WERROR_CFLAGS}" >&6; }
 fi
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/msp430/ChangeLog b/sim/msp430/ChangeLog
index ed87e9f..3d14ecb 100644
--- a/sim/msp430/ChangeLog
+++ b/sim/msp430/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/msp430/aclocal.m4 b/sim/msp430/aclocal.m4
index ddeb1f5..4300d0e 100644
--- a/sim/msp430/aclocal.m4
+++ b/sim/msp430/aclocal.m4
@@ -115,6 +115,7 @@ m4_include([../m4/sim_ac_option_alignment.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/msp430/config.in b/sim/msp430/config.in
index 2416b7f..8d37b72 100644
--- a/sim/msp430/config.in
+++ b/sim/msp430/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/msp430/configure b/sim/msp430/configure
index ae50e46..5c43b29 100755
--- a/sim/msp430/configure
+++ b/sim/msp430/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -757,6 +754,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_alignment'
 ac_subst_files=''
@@ -785,6 +785,7 @@ enable_sim_alignment
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1444,6 +1445,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11183,7 +11186,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11186 "configure"
+#line 11189 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11289,7 +11292,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11292 "configure"
+#line 11295 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12030,6 +12033,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/or1k/ChangeLog b/sim/or1k/ChangeLog
index b4404f0..dd34d45 100644
--- a/sim/or1k/ChangeLog
+++ b/sim/or1k/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/or1k/aclocal.m4 b/sim/or1k/aclocal.m4
index 73a795c..e1659b4 100644
--- a/sim/or1k/aclocal.m4
+++ b/sim/or1k/aclocal.m4
@@ -118,6 +118,7 @@ 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_environment.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])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/or1k/config.in b/sim/or1k/config.in
index 2416b7f..8d37b72 100644
--- a/sim/or1k/config.in
+++ b/sim/or1k/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/or1k/configure b/sim/or1k/configure
index 4a7f8be..9e2040e 100755
--- a/sim/or1k/configure
+++ b/sim/or1k/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_float
 cgen_breaks
 cgen
@@ -758,6 +755,9 @@ WERROR_CFLAGS
 WARN_CFLAGS
 sim_scache
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_default_model
 sim_bitsize
@@ -792,6 +792,7 @@ enable_werror
 enable_build_warnings
 enable_sim_build_warnings
 enable_cgen_maint
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1457,6 +1458,8 @@ Optional Features:
                           enable SIM specific build-time compiler warnings if
                           gcc is used
   --enable-cgen-maint=DIR build cgen generated files
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11196,7 +11199,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11199 "configure"
+#line 11202 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11302,7 +11305,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11305 "configure"
+#line 11308 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12189,6 +12192,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/pru/ChangeLog b/sim/pru/ChangeLog
index 833dcc5..926fe2d 100644
--- a/sim/pru/ChangeLog
+++ b/sim/pru/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/pru/aclocal.m4 b/sim/pru/aclocal.m4
index ddeb1f5..4300d0e 100644
--- a/sim/pru/aclocal.m4
+++ b/sim/pru/aclocal.m4
@@ -115,6 +115,7 @@ m4_include([../m4/sim_ac_option_alignment.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/pru/config.in b/sim/pru/config.in
index 2416b7f..8d37b72 100644
--- a/sim/pru/config.in
+++ b/sim/pru/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/pru/configure b/sim/pru/configure
index ae50e46..5c43b29 100755
--- a/sim/pru/configure
+++ b/sim/pru/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -757,6 +754,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_alignment'
 ac_subst_files=''
@@ -785,6 +785,7 @@ enable_sim_alignment
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1444,6 +1445,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11183,7 +11186,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11186 "configure"
+#line 11189 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11289,7 +11292,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11292 "configure"
+#line 11295 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12030,6 +12033,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/riscv/ChangeLog b/sim/riscv/ChangeLog
index 90abdf9..0993913 100644
--- a/sim/riscv/ChangeLog
+++ b/sim/riscv/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/riscv/aclocal.m4 b/sim/riscv/aclocal.m4
index bc1ef46..9710f3f 100644
--- a/sim/riscv/aclocal.m4
+++ b/sim/riscv/aclocal.m4
@@ -117,6 +117,7 @@ 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_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/riscv/config.in b/sim/riscv/config.in
index 2416b7f..8d37b72 100644
--- a/sim/riscv/config.in
+++ b/sim/riscv/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/riscv/configure b/sim/riscv/configure
index 29f0c4ca..96f4fff 100755
--- a/sim/riscv/configure
+++ b/sim/riscv/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_scache
 sim_float
 cgen_breaks
@@ -755,6 +752,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_default_model
 sim_bitsize
@@ -787,6 +787,7 @@ enable_build_warnings
 enable_sim_build_warnings
 enable_sim_default_model
 enable_sim_bitsize
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1449,6 +1450,8 @@ Optional Features:
   --enable-sim-default-model=model
                           Specify default model to simulate
   --enable-sim-bitsize=N  Specify target bitsize (32 or 64)
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11188,7 +11191,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11191 "configure"
+#line 11194 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11294,7 +11297,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11297 "configure"
+#line 11300 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12146,6 +12149,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/rl78/ChangeLog b/sim/rl78/ChangeLog
index b8d10b6..4adb625 100644
--- a/sim/rl78/ChangeLog
+++ b/sim/rl78/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/rl78/aclocal.m4 b/sim/rl78/aclocal.m4
index db8c5cd..ed05269 100644
--- a/sim/rl78/aclocal.m4
+++ b/sim/rl78/aclocal.m4
@@ -113,6 +113,7 @@ m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/rl78/config.in b/sim/rl78/config.in
index 2416b7f..8d37b72 100644
--- a/sim/rl78/config.in
+++ b/sim/rl78/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/rl78/configure b/sim/rl78/configure
index a53a2b4..0a61270 100755
--- a/sim/rl78/configure
+++ b/sim/rl78/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -758,7 +755,10 @@ PATH_SEPARATOR
 SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
-sim_inline'
+sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -783,6 +783,7 @@ with_bugurl
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1437,6 +1438,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11176,7 +11179,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11179 "configure"
+#line 11182 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11282,7 +11285,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11285 "configure"
+#line 11288 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11928,6 +11931,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/rx/ChangeLog b/sim/rx/ChangeLog
index bfb417d..fbc8516 100644
--- a/sim/rx/ChangeLog
+++ b/sim/rx/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/rx/aclocal.m4 b/sim/rx/aclocal.m4
index db8c5cd..ed05269 100644
--- a/sim/rx/aclocal.m4
+++ b/sim/rx/aclocal.m4
@@ -113,6 +113,7 @@ m4_include([../../lt~obsolete.m4])
 m4_include([../m4/sim_ac_common.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/rx/config.in b/sim/rx/config.in
index 9d69487..7cb68b3 100644
--- a/sim/rx/config.in
+++ b/sim/rx/config.in
@@ -19,6 +19,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -34,6 +37,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/rx/configure b/sim/rx/configure
index 7a2f9ea..e227982 100755
--- a/sim/rx/configure
+++ b/sim/rx/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -758,7 +755,10 @@ PATH_SEPARATOR
 SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
-sim_inline'
+sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags'
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
@@ -785,6 +785,7 @@ enable_cycle_stats
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1442,6 +1443,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11181,7 +11184,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11184 "configure"
+#line 11187 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11287,7 +11290,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11290 "configure"
+#line 11293 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11973,6 +11976,107 @@ $as_echo "${WARN_CFLAGS} ${WERROR_CFLAGS}" >&6; }
 fi
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/sh/ChangeLog b/sim/sh/ChangeLog
index 98d1f35..d89fe28 100644
--- a/sim/sh/ChangeLog
+++ b/sim/sh/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* interp.c: Update includes.
diff --git a/sim/sh/aclocal.m4 b/sim/sh/aclocal.m4
index ddeb1f5..4300d0e 100644
--- a/sim/sh/aclocal.m4
+++ b/sim/sh/aclocal.m4
@@ -115,6 +115,7 @@ m4_include([../m4/sim_ac_option_alignment.m4])
 m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_output.m4])
diff --git a/sim/sh/config.in b/sim/sh/config.in
index 2416b7f..8d37b72 100644
--- a/sim/sh/config.in
+++ b/sim/sh/config.in
@@ -13,6 +13,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
@@ -28,6 +31,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/sh/configure b/sim/sh/configure
index 25f04f5..afd78ba 100755
--- a/sim/sh/configure
+++ b/sim/sh/configure
@@ -634,9 +634,6 @@ ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
 sim_reserved_bits
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -757,6 +754,9 @@ SHELL
 WERROR_CFLAGS
 WARN_CFLAGS
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_alignment'
 ac_subst_files=''
@@ -785,6 +785,7 @@ enable_sim_alignment
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1444,6 +1445,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11183,7 +11186,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11186 "configure"
+#line 11189 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11289,7 +11292,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11292 "configure"
+#line 11295 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12027,6 +12030,107 @@ fi
 
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/v850/ChangeLog b/sim/v850/ChangeLog
index 82a1d74..d46aa59 100644
--- a/sim/v850/ChangeLog
+++ b/sim/v850/ChangeLog
@@ -1,3 +1,7 @@
+2021-04-26  Mike Frysinger  <vapier@gentoo.org>
+
+	* aclocal.m4, config.in, configure: Regenerate.
+
 2021-04-22  Tom Tromey  <tom@tromey.com>
 
 	* configure, config.in: Rebuild.
diff --git a/sim/v850/aclocal.m4 b/sim/v850/aclocal.m4
index a0d32d4..02c1113 100644
--- a/sim/v850/aclocal.m4
+++ b/sim/v850/aclocal.m4
@@ -116,6 +116,7 @@ m4_include([../m4/sim_ac_option_assert.m4])
 m4_include([../m4/sim_ac_option_bitsize.m4])
 m4_include([../m4/sim_ac_option_endian.m4])
 m4_include([../m4/sim_ac_option_environment.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])
 m4_include([../m4/sim_ac_option_warnings.m4])
diff --git a/sim/v850/config.in b/sim/v850/config.in
index 1eb9e29..8249d7c 100644
--- a/sim/v850/config.in
+++ b/sim/v850/config.in
@@ -19,6 +19,9 @@
 /* Define to 1 if you have the <dlfcn.h> header file. */
 #undef HAVE_DLFCN_H
 
+/* Define if dv-sockser is usable. */
+#undef HAVE_DV_SOCKSER
+
 /* Define to 1 if you have the `execv' function. */
 #undef HAVE_EXECV
 
@@ -43,6 +46,9 @@
 /* Define to 1 if you have the <inttypes.h> header file. */
 #undef HAVE_INTTYPES_H
 
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
 /* Define to 1 if you have the `nsl' library (-lnsl). */
 #undef HAVE_LIBNSL
 
diff --git a/sim/v850/configure b/sim/v850/configure
index aa74f6a..d5941de 100755
--- a/sim/v850/configure
+++ b/sim/v850/configure
@@ -633,9 +633,6 @@ ac_header_list=
 ac_func_list=
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
-sim_hw
-sim_hw_objs
-sim_hw_cflags
 sim_default_model
 sim_scache
 sim_float
@@ -756,6 +753,9 @@ WERROR_CFLAGS
 WARN_CFLAGS
 sim_reserved_bits
 sim_inline
+sim_hw
+sim_hw_objs
+sim_hw_cflags
 sim_endian
 sim_bitsize
 sim_alignment'
@@ -787,6 +787,7 @@ enable_sim_bitsize
 enable_werror
 enable_build_warnings
 enable_sim_build_warnings
+enable_sim_hardware
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1450,6 +1451,8 @@ Optional Features:
   --enable-sim-build-warnings
                           enable SIM specific build-time compiler warnings if
                           gcc is used
+  --enable-sim-hardware=LIST
+                          Specify the hardware to be included in the build.
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -11196,7 +11199,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11199 "configure"
+#line 11202 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11302,7 +11305,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11305 "configure"
+#line 11308 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12135,6 +12138,107 @@ $as_echo "${WARN_CFLAGS} ${WERROR_CFLAGS}" >&6; }
 fi
 
 
+hardware="cfi core pal glue "
+sim_hw_cflags="-DWITH_HW=1"
+sim_hw="$hardware"
+sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([^ ][^ ]*\)/dv-\1.o/g'`"
+
+# Check whether --enable-sim-hardware was given.
+if test "${enable_sim_hardware+set}" = set; then :
+  enableval=$enable_sim_hardware;
+else
+  enable_sim_hardware="yes"
+fi
+
+case ${enable_sim_hardware} in
+  yes|no) ;;
+  ,*) hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
+  *,) hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
+  *)  hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
+esac
+
+if test "$enable_sim_hardware" = no; then
+  sim_hw_objs=
+  sim_hw_cflags="-DWITH_HW=0"
+  sim_hw=
+else
+  sim_hw_cflags="-DWITH_HW=1"
+  # remove duplicates
+  sim_hw=""
+  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
+  for i in $hardware ; do
+    case " $sim_hw " in
+      *" $i "*) ;;
+      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
+    esac
+  done
+  # mingw does not support sockser
+  case ${host} in
+    *mingw*) ;;
+    *) # TODO: We don't add dv-sockser to sim_hw as it is not a "real" device
+       # that you instatiate.  Instead, other code will call into it directly.
+       # At some point, we should convert it over.
+       sim_hw_objs="$sim_hw_objs dv-sockser.o"
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DV_SOCKSER 1
+_ACEOF
+
+       ;;
+  esac
+  if test x"$silent" != x"yes"; then
+    echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
+  fi
+    case " $hardware " in
+    *" cfi "*) { $as_echo "$as_me:${as_lineno-$LINENO}: checking for log2 in -lm" >&5
+$as_echo_n "checking for log2 in -lm... " >&6; }
+if ${ac_cv_lib_m_log2+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lm  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char log2 ();
+int
+main ()
+{
+return log2 ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_lib_m_log2=yes
+else
+  ac_cv_lib_m_log2=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_m_log2" >&5
+$as_echo "$ac_cv_lib_m_log2" >&6; }
+if test "x$ac_cv_lib_m_log2" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBM 1
+_ACEOF
+
+  LIBS="-lm $LIBS"
+
+fi
+;;
+  esac
+fi
+
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";