Makefile: fix the "built from commit" code

diff --git a/Makefile b/Makefile
index 2ce70d205d9284ee2f0454ad66dcca73f90e1dc8..afed47f68d1fc31dccc5d56de164aa5d4f29426a 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -1903,8 +1903,9 @@ version.sp version.s version.o: GIT-VERSION-FILE GIT-USER-AGENT
 version.sp version.s version.o: EXTRA_CPPFLAGS = \
        '-DGIT_VERSION="$(GIT_VERSION)"' \
        '-DGIT_USER_AGENT=$(GIT_USER_AGENT_CQ_SQ)' \
-       '-DGIT_BUILT_FROM_COMMIT="$(shell GIT_CEILING_DIRECTORIES=\"$(CURDIR)/..\" \
-               git rev-parse -q --verify HEAD || :)"'
+       '-DGIT_BUILT_FROM_COMMIT="$(shell \
+               GIT_CEILING_DIRECTORIES="$(CURDIR)/.." \
+               git rev-parse -q --verify HEAD 2>/dev/null)"'
 
 $(BUILT_INS): git$X
        $(QUIET_BUILT_IN)$(RM) $@ && \