[PATCH 1/4] Move git_version_string to help.c in preparation for diff changes

["Zbigniew Jędrzejewski-Szmek" <zbyszek@in.waw.pl>]

git_version_string is declared in builtins.h, but lived in git.c.

When diff.c starts to use functions from help.c, linking against
libgit.a will fail, unless git.o containing git_version_string is
linked too. This variable is only used in a couple of places, help.c
being one of them. git.o is biggish, so it let's move
git_version_string to help.c.

Signed-off-by: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
---
 Makefile |    5 +++--
 git.c    |    2 --
 help.c   |    2 ++
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index a782409..264fe4f 100644
--- a/Makefile
+++ b/Makefile
@@ -1851,7 +1851,7 @@ strip: $(PROGRAMS) git$X
 	$(STRIP) $(STRIP_OPTS) $(PROGRAMS) git$X
 
 git.o: common-cmds.h
-git.sp git.s git.o: EXTRA_CPPFLAGS = -DGIT_VERSION='"$(GIT_VERSION)"' \
+git.sp git.s git.o: EXTRA_CPPFLAGS = \
 	'-DGIT_HTML_PATH="$(htmldir_SQ)"' \
 	'-DGIT_MAN_PATH="$(mandir_SQ)"' \
 	'-DGIT_INFO_PATH="$(infodir_SQ)"'
@@ -1860,7 +1860,8 @@ git$X: git.o GIT-LDFLAGS $(BUILTIN_OBJS) $(GITLIBS)
 	$(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ git.o \
 		$(BUILTIN_OBJS) $(ALL_LDFLAGS) $(LIBS)
 
-help.sp help.o: common-cmds.h
+help.o: common-cmds.h
+help.sp help.o: EXTRA_CPPFLAGS = -DGIT_VERSION='"$(GIT_VERSION)"'
 
 builtin/help.sp builtin/help.o: common-cmds.h
 builtin/help.sp builtin/help.s builtin/help.o: EXTRA_CPPFLAGS = \
diff --git a/git.c b/git.c
index 3805616..a24a0fd 100644
--- a/git.c
+++ b/git.c
@@ -256,8 +256,6 @@ static int handle_alias(int *argcp, const char ***argv)
 	return ret;
 }
 
-const char git_version_string[] = GIT_VERSION;
-
 #define RUN_SETUP		(1<<0)
 #define RUN_SETUP_GENTLY	(1<<1)
 #define USE_PAGER		(1<<2)
diff --git a/help.c b/help.c
index cbbe966..bc15066 100644
--- a/help.c
+++ b/help.c
@@ -409,6 +409,8 @@ const char *help_unknown_cmd(const char *cmd)
 	exit(1);
 }
 
+const char git_version_string[] = GIT_VERSION;
+
 int cmd_version(int argc, const char **argv, const char *prefix)
 {
 	printf("git version %s\n", git_version_string);
-- 
1.7.9.rc2.127.gcb239