Re: [PATCH] git-shell needs $(COMPAT_OBJS)

From: Junio C Hamano <gitster@pobox.com>
Date: Jul 20, 2008, 22:55 UTC
Message-ID: <7vhcak2mip.fsf@gitster.siamese.dyndns.org>
In-Reply-To: <7vzloc2odx.fsf@gitster.siamese.dyndns.org>

Junio C Hamano <gitster@pobox.com> writes:

Show 13 quoted lines

> Johannes Sixt <johannes.sixt@telecom.at> writes:
>
>> On Sonntag, 20. Juli 2008, Johannes Sixt wrote:
>>> -git-shell$X: compat/strlcpy.o abspath.o ctype.o exec_cmd.o quote.o
>>> strbuf.o usage.o wrapper.o shell.o
>>> +git-shell$X: abspath.o ctype.o 
>>> exec_cmd.o quote.o strbuf.o usage.o wrapper.o shell.o $(COMPAT_OBJS)
>>
>> Unfortunately, that's only half the deal. If we compile with NO_PREAD=1, this 
>> needs read_in_full(),...
>
> Well, if compat/* implementations use anything outside compat/ left and
> right, then all bets are off.

If compat/ layer tries to really be about "compatibility", they should not be using things like xmalloc() that call release_pack_meory() that is in sha1_file.c. From a quick glance, mingw.c, mmap.c, pread.c are major offenders, but others such as setenv.c seem to be carefully written.

Perhaps we should apply a variant of your patch to allow linking from compat/ routines to git-shell, so that people affected by the compat layer functions that call outside compat layer have incentive to fix them.

 Makefile |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 2b670d7..551bde9 100644
--- a/Makefile
+++ b/Makefile
@@ -324,6 +324,7 @@ endif
 export PERL_PATH
 
 LIB_FILE=libgit.a
+COMPAT_LIB = compat/lib.a
 XDIFF_LIB=xdiff/lib.a
 
 LIB_H += archive.h
@@ -1203,8 +1204,11 @@ git-http-push$X: revision.o http.o http-push.o $(GITLIBS)
 	$(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) \
 		$(LIBS) $(CURL_LIBCURL) $(EXPAT_LIBEXPAT)
 
-git-shell$X: compat/strlcpy.o abspath.o ctype.o exec_cmd.o quote.o strbuf.o usage.o wrapper.o shell.o
-	$(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^)
+$(COMPAT_LIB): $(COMPAT_OBJS)
+	$(QUIET_AR)$(RM) $@ && $(AR) rcs $@ $(COMPAT_OBJS)
+
+git-shell$X: abspath.o ctype.o exec_cmd.o quote.o strbuf.o usage.o wrapper.o shell.o $(COMPAT_LIB)
+	$(QUIET_LINK)$(CC) $(ALL_CFLAGS) -o $@ $(ALL_LDFLAGS) $(filter %.o,$^) $(COMPAT_LIB)
 
 $(LIB_OBJS) $(BUILTIN_OBJS): $(LIB_H)
 $(patsubst git-%$X,%.o,$(PROGRAMS)): $(LIB_H) $(wildcard */*.h)
@@ -1402,7 +1406,7 @@ distclean: clean
 
 clean:
 	$(RM) *.o mozilla-sha1/*.o arm/*.o ppc/*.o compat/*.o xdiff/*.o \
-		$(LIB_FILE) $(XDIFF_LIB)
+		$(LIB_FILE) $(XDIFF_LIB) $(COMPAT_LIB)
 	$(RM) $(ALL_PROGRAMS) $(BUILT_INS) git$X
 	$(RM) $(TEST_PROGRAMS)
 	$(RM) *.spec *.pyc *.pyo */*.pyc */*.pyo common-cmds.h TAGS tags cscope*