sim: common: start dedicated local.mk

This provides a space to generate things that we only need to build
once per-arch.  Some day that will be all of common/, but for now,
we move the version.c management in.

3 files changed, 49 insertions, 9 deletions

diff --git a/sim/common/ChangeLog b/sim/common/ChangeLog
index 4ce0c4c..ac34874 100644
--- a/sim/common/ChangeLog
+++ b/sim/common/ChangeLog
@@ -1,3 +1,11 @@
+2021-06-05  Mike Frysinger  <vapier@gentoo.org>
+
+	* Make-common.in (COMMON_OBJS): Define.
+	(LIB_OBJS): Replace version.o with $(COMMON_OBJS).
+	(version.c): Delete target.
+	(generated_files): Delete version.c.
+	* local.mk: New file.
+
 2021-05-29  Mike Frysinger  <vapier@gentoo.org>
 
 	* Make-common.in (EXTRA_LIBS): Add $(LIBGNU_EXTRA_LIBS).
diff --git a/sim/common/Make-common.in b/sim/common/Make-common.in
index 160e912..b17b2e0 100644
--- a/sim/common/Make-common.in
+++ b/sim/common/Make-common.in
@@ -255,8 +255,9 @@ LIBDEPS = $(BFD_LIB) $(OPCODES_LIB) $(LIBINTL_DEP) $(LIBIBERTY_LIB)
 EXTRA_LIBS = $(BFD_LIB) $(OPCODES_LIB) $(LIBINTL) $(LIBIBERTY_LIB) \
 	$(CONFIG_LIBS) $(SIM_EXTRA_LIBS) $(LIBDL) $(LIBGNU) $(LIBGNU_EXTRA_LIBS)
 
-LIB_OBJS = callback.o modules.o syscall.o targ-map.o version.o \
-	$(SIM_OBJS)
+COMMON_OBJS = ../common/version.o
+
+LIB_OBJS = callback.o modules.o syscall.o targ-map.o $(COMMON_OBJS) $(SIM_OBJS)
 
 COMPILE_FOR_BUILD = $(CC_FOR_BUILD) $(BUILD_CFLAGS)
 LINK_FOR_BUILD = $(CC_FOR_BUILD) $(BUILD_CFLAGS) $(LDFLAGS_FOR_BUILD) -o $@
@@ -297,11 +298,6 @@ stamp-tvals: gentmap
 	$(SHELL) $(srcroot)/move-if-change tmp-tmap.c targ-map.c
 	touch stamp-tvals
 
-version.c: Makefile $(srcroot)/gdb/version.in $(srcroot)/bfd/version.h $(srcroot)/sim/common/create-version.sh
-	$(SHELL) $(srcroot)/sim/common/create-version.sh $(srcroot)/gdb $@.tmp
-	$(SHELL) $(srcroot)/move-if-change $@.tmp $@
-	touch $@
-
 #
 # Rules for building sim-* components.  Triggered by listing the corresponding
 # .o file in the list of simulator targets.
@@ -429,8 +425,7 @@ generated_files = \
 	hw-config.h \
 	modules.c \
 	targ-map.c \
-	targ-vals.h \
-	version.c
+	targ-vals.h
 
 # Ensure that generated files are created early.  Use order-only
 # dependencies if available.  They require GNU make 3.80 or newer,
diff --git a/sim/common/local.mk b/sim/common/local.mk
new file mode 100644
index 0000000..357be75
--- /dev/null
+++ b/sim/common/local.mk
@@ -0,0 +1,37 @@
+## See sim/Makefile.am.
+#
+# Copyright (C) 1997-2021 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/>.
+
+# Parts of the common/ sim code that have been unified.
+# Most still lives in common/Make-common.in.
+
+AM_CPPFLAGS += -I$(srcdir)/%D%
+
+# This makes sure common parts are available before building the arch-subdirs
+# which will refer to these.
+SIM_ALL_RECURSIVE_DEPS += \
+	%D%/libcommon.a
+
+# NB: libcommon.a isn't used directly by ports.  We need a target for common
+# objects to be a part of, and ports use the individual objects directly.
+noinst_LIBRARIES += %D%/libcommon.a
+%C%_libcommon_a_SOURCES = \
+	%D%/version.c
+
+%D%/version.c: $(srcroot)/gdb/version.in $(srcroot)/bfd/version.h $(srcdir)/%D%/create-version.sh
+	$(SHELL) $(srcdir)/%D%/create-version.sh $(srcroot)/gdb $@.tmp
+	$(SHELL) $(srcroot)/move-if-change $@.tmp $@
+	touch $@