sim erc32: Add include path for readline.

Add a READLINE_CFLAGS variable which adds the include path to the
in-tree readline when using the in-tree readline library.

sim/erc32/ChangeLog:

	* Makefile.in (READLINE_SRC, READLINE_CFLAGS): Add.
	(SIM_EXTRA_CFLAGS): Add READLINE_CFLAGS.
	* configure: Rebuild.
	* configure.ac (READLINE_CFLAGS): Add.

4 files changed, 21 insertions, 3 deletions

diff --git a/sim/erc32/ChangeLog b/sim/erc32/ChangeLog
index 3b85c66..389884b 100644
--- a/sim/erc32/ChangeLog
+++ b/sim/erc32/ChangeLog
@@ -1,3 +1,10 @@
+2021-04-15  John Baldwin  <jhb@FreeBSD.org>
+
+	* Makefile.in (READLINE_SRC, READLINE_CFLAGS): Add.
+	(SIM_EXTRA_CFLAGS): Add READLINE_CFLAGS.
+	* configure: Rebuild.
+	* configure.ac (READLINE_CFLAGS): Add.
+
 2021-04-08  Tom Tromey  <tom@tromey.com>
 
 	* func.c: Include sys/time.h.
diff --git a/sim/erc32/Makefile.in b/sim/erc32/Makefile.in
index 0006922..f52daf7 100644
--- a/sim/erc32/Makefile.in
+++ b/sim/erc32/Makefile.in
@@ -19,10 +19,14 @@
 ## COMMON_PRE_CONFIG_FRAG
 
 TERMCAP_LIB = @TERMCAP@
+
+READLINE_SRC = $(srcroot)/readline/readline
 READLINE_LIB = @READLINE@
+READLINE_CFLAGS = @READLINE_CFLAGS@
 
 SIM_OBJS = exec.o erc32.o func.o help.o float.o interf.o
 SIM_RUN_OBJS = sis.o
+SIM_EXTRA_CFLAGS = $(READLINE_CFLAGS)
 SIM_EXTRA_LIBS = $(READLINE_LIB) $(TERMCAP_LIB) -lm
 SIM_EXTRA_INSTALL = install-sis
 SIM_EXTRA_CLEAN = clean-sis
@@ -30,7 +34,7 @@ SIM_EXTRA_CLEAN = clean-sis
 # UARTS run at about 115200 baud (simulator time). Add -DFAST_UART to
 # CFLAGS if faster (infinite) UART speed is desired. Might affect the
 # behaviour of UART interrupt routines ...
-SIM_EXTRA_CFLAGS = -DFAST_UART -I$(srcroot)
+SIM_EXTRA_CFLAGS += -DFAST_UART -I$(srcroot)
 
 ## COMMON_POST_CONFIG_FRAG
 
diff --git a/sim/erc32/configure b/sim/erc32/configure
index 3f7227b..548b11c 100755
--- a/sim/erc32/configure
+++ b/sim/erc32/configure
@@ -642,6 +642,7 @@ sim_endian
 sim_bitsize
 sim_alignment
 cgen_breaks
+READLINE_CFLAGS
 READLINE
 TERMCAP
 REPORT_BUGS_TEXI
@@ -11227,7 +11228,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11230 "configure"
+#line 11231 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11333,7 +11334,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11336 "configure"
+#line 11337 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12071,6 +12072,7 @@ fi
 # src/readline (if it's there) is configured before src/sim.
 if test -r ../../readline/Makefile; then
   READLINE=../../readline/readline/libreadline.a
+  READLINE_CFLAGS='-I$(READLINE_SRC)/..'
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for readline in -lreadline" >&5
 $as_echo_n "checking for readline in -lreadline... " >&6; }
@@ -12114,9 +12116,11 @@ else
   as_fn_error $? "the required \"readline\" library is missing" "$LINENO" 5
 fi
 
+  READLINE_CFLAGS=
 fi
 
 
+
 cgen_breaks=""
 if grep CGEN_MAINT $srcdir/Makefile.in >/dev/null; then
 cgen_breaks="break cgen_rtx_error";
diff --git a/sim/erc32/configure.ac b/sim/erc32/configure.ac
index 8b7b688..cf7ec5f 100644
--- a/sim/erc32/configure.ac
+++ b/sim/erc32/configure.ac
@@ -39,9 +39,12 @@ AC_SUBST(TERMCAP)
 # src/readline (if it's there) is configured before src/sim.
 if test -r ../../readline/Makefile; then
   READLINE=../../readline/readline/libreadline.a
+  READLINE_CFLAGS='-I$(READLINE_SRC)/..'
 else
   AC_CHECK_LIB(readline, readline, READLINE=-lreadline,
 	       AC_ERROR([the required "readline" library is missing]), $TERMCAP)
+  READLINE_CFLAGS=
 fi
 AC_SUBST(READLINE)
+AC_SUBST(READLINE_CFLAGS)
 SIM_AC_OUTPUT