sim: create a makefile fragment to pass common settings down

As we merge settings from subdirs into the common configure, we
sometimes need to keep the settings working in both dirs.  Create
a makefile fragment to pass them down so we don't have to run the
checks twice.  For now, the file is empty, but we'll start moving
logic in shortly.

sim/ChangeLog

@@ -1,3 +1,9 @@
+2021-06-18  Mike Frysinger  <vapier@gentoo.org>
+
+	* configure.ac: Output arch-subdir.mk.
+	* Makefile.in, configure: Regenerate.
+	* arch-subdir.mk.in: New file.
+
 2021-06-17  Mike Frysinger  <vapier@gentoo.org>
 
 	* configure.ac: Call SIM_AC_OPTION_ENDIAN.

sim/Makefile.in

@@ -217,7 +217,7 @@ am__CONFIG_DISTCLEAN_FILES = config.status config.cache config.log \
  configure.lineno config.status.lineno
 mkinstalldirs = $(SHELL) $(top_srcdir)/../mkinstalldirs
 CONFIG_HEADER = config.h
-CONFIG_CLEAN_FILES =
+CONFIG_CLEAN_FILES = arch-subdir.mk
 CONFIG_CLEAN_VPATH_FILES =
 LIBRARIES = $(noinst_LIBRARIES)
 ARFLAGS = cru
@@ -866,6 +866,8 @@ $(srcdir)/config.h.in: @MAINTAINER_MODE_TRUE@ $(am__configure_deps)
 
 distclean-hdr:
 	-rm -f config.h stamp-h1
+arch-subdir.mk: $(top_builddir)/config.status $(srcdir)/arch-subdir.mk.in
+	cd $(top_builddir) && $(SHELL) ./config.status $@
 
 clean-noinstLIBRARIES:
 	-test -z "$(noinst_LIBRARIES)" || rm -f $(noinst_LIBRARIES)

sim/arch-subdir.mk.in

@@ -0,0 +1,18 @@
+## Fragment to pass common settings into arch subdir builds.
+## NB: This should eventually be merged into sim/Makefile.am once there are no
+## subdir configure scripts.
+#
+#   Copyright (C) 1993-2021 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.

sim/common/ChangeLog

@@ -1,3 +1,7 @@
+2021-06-18  Mike Frysinger  <vapier@gentoo.org>
+
+	* Make-common.in: Include ../arch-subdir.mk.
+
 2021-06-18  Mike Frysinger  <vapier@gentoo.org>
 
 	* cgen-run.c: Include sim-signal.h.

sim/common/Make-common.in

@@ -46,6 +46,9 @@ include $(srcroot)/gdb/silent-rules.mk
 GNULIB_PARENT_DIR = ../..
 include $(GNULIB_PARENT_DIR)/gnulib/Makefile.gnulib.inc
 
+# Settings from top-level configure.
+include ../arch-subdir.mk
+
 prefix = @prefix@
 exec_prefix = @exec_prefix@
 

sim/configure

@@ -6883,7 +6883,7 @@ _ACEOF
 $as_echo "$sim_trace" >&6; }
 
 
-ac_config_files="$ac_config_files Makefile"
+ac_config_files="$ac_config_files arch-subdir.mk Makefile"
 
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
@@ -7622,6 +7622,7 @@ do
   case $ac_config_target in
     "config.h") CONFIG_HEADERS="$CONFIG_HEADERS config.h" ;;
     "depfiles") CONFIG_COMMANDS="$CONFIG_COMMANDS depfiles" ;;
+    "arch-subdir.mk") CONFIG_FILES="$CONFIG_FILES arch-subdir.mk" ;;
     "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
 
   *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;

sim/configure.ac

@@ -118,5 +118,5 @@ SIM_AC_OPTION_PROFILE
 SIM_AC_OPTION_STDIO
 SIM_AC_OPTION_TRACE
 
-AC_CONFIG_FILES([Makefile])
+AC_CONFIG_FILES([arch-subdir.mk Makefile])
 AC_OUTPUT

sim/ppc/ChangeLog

@@ -1,3 +1,7 @@
+2021-06-18  Mike Frysinger  <vapier@gentoo.org>
+
+	* Makefile.in: Include ../arch-subdir.mk.
+
 2021-06-18  Mike Frysinger  <vapier@gentoo.org>
 
 	* sim-main.h: Delete sim-signal.h include.

sim/ppc/Makefile.in

@@ -25,6 +25,9 @@ srccom = $(srcdir)/../common
 srcroot = $(srcdir)/../..
 srcsim = $(srcdir)/..
 
+# Settings from top-level configure.
+include ../arch-subdir.mk
+
 prefix = @prefix@
 exec_prefix = @exec_prefix@