Use a stamp file for version.c

This introduces a stamp file for version.c, preventing unnecessary
version.o rebuilds.

gdb/ChangeLog
2018-07-09  Tom Tromey  <tom@tromey.com>

	* Makefile.in (clean mostlyclean): Remove stamp-version.
	(version.c): Depend on stamp-version.
	(stamp-version): New rule, from version.c rule.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 7e39800cfd4e8bc493a7b823a22391c27438d2d3..75a8f67f13f51fee080666b0a5153b09ee03092a 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2018-07-09  Tom Tromey  <tom@tromey.com>
+
+       * Makefile.in (clean mostlyclean): Remove stamp-version.
+       (version.c): Depend on stamp-version.
+       (stamp-version): New rule, from version.c rule.
+
 2018-07-09  Tom Tromey  <tom@tromey.com>
 
        * Makefile.in (init.c): Depend on stamp-init.

diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index d14e86727b8a937c1779ab9b807c40bb796b9651..fa93ac36c8f626b26fb9675785fe601563efff9e 100644 (file)
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -1948,7 +1948,7 @@ tags: TAGS
 clean mostlyclean: $(CONFIG_CLEAN)
        @$(MAKE) $(FLAGS_TO_PASS) DO=clean "DODIRS=$(CLEANDIRS)" subdir_do
        rm -f *.o *.a $(ADD_FILES) *~ init.c-tmp init.l-tmp version.c-tmp
-       rm -f init.c stamp-init version.c
+       rm -f init.c stamp-init version.c stamp-version
        rm -f gdb$(EXEEXT) core make.log
        rm -f gdb[0-9]$(EXEEXT)
        rm -f test-cp-name-parser$(EXEEXT)
@@ -2138,9 +2138,15 @@ $(srcdir)/copying.c: @MAINTAINER_MODE_TRUE@ $(srcdir)/../COPYING3 $(srcdir)/copy
                < $(srcdir)/../COPYING3 > $(srcdir)/copying.tmp
        mv $(srcdir)/copying.tmp $(srcdir)/copying.c
 
-version.c: Makefile version.in $(srcdir)/../bfd/version.h $(srcdir)/common/create-version.sh
+version.c: stamp-version; @true
+# Note that the obvious names for the temp file are taken by
+# create-version.sh.
+stamp-version: Makefile version.in $(srcdir)/../bfd/version.h $(srcdir)/common/create-version.sh
        $(ECHO_GEN) $(SHELL) $(srcdir)/common/create-version.sh $(srcdir) \
-           $(host_alias) $(target_alias) version.c
+           $(host_alias) $(target_alias) version-t.t
+       @$(SHELL) $(srcdir)/../move-if-change version-t.t version.c
+       @echo stamp > stamp-version
+
 
 lint: $(LINTFILES)
        $(LINT) $(INCLUDE_CFLAGS) $(LINTFLAGS) $(LINTFILES) \