We force the GIT-BUILD-OPTIONS recipe to run every time "make" is invoked. We must do this to catch new options which may have come from the command-line or environment.
However, we actually update the file's timestamp each time the recipe is run, whether anything changed or not. As a result, any files which depend on it (for example, all of the perl scripts, which need to know whether NO_PERL was set) will be re-built every time. Let's do our usual trick of writing to a tempfile, then doing a "cmp || mv" to update the file only when something changed. Signed-off-by: Jeff King <[email protected]> --- Makefile | 45 +++++++++++++++++++++++---------------------- 1 file changed, 23 insertions(+), 22 deletions(-) diff --git a/Makefile b/Makefile index 6283353..6b4fbeb 100644 --- a/Makefile +++ b/Makefile @@ -2103,46 +2103,47 @@ GIT-LDFLAGS: FORCE # that runs GIT-BUILD-OPTIONS, and then again to protect it # and the first level quoting from the shell that runs "echo". GIT-BUILD-OPTIONS: FORCE - @echo SHELL_PATH=\''$(subst ','\'',$(SHELL_PATH_SQ))'\' >$@ - @echo PERL_PATH=\''$(subst ','\'',$(PERL_PATH_SQ))'\' >>$@ - @echo DIFF=\''$(subst ','\'',$(subst ','\'',$(DIFF)))'\' >>$@ - @echo PYTHON_PATH=\''$(subst ','\'',$(PYTHON_PATH_SQ))'\' >>$@ - @echo TAR=\''$(subst ','\'',$(subst ','\'',$(TAR)))'\' >>$@ - @echo NO_CURL=\''$(subst ','\'',$(subst ','\'',$(NO_CURL)))'\' >>$@ - @echo NO_EXPAT=\''$(subst ','\'',$(subst ','\'',$(NO_EXPAT)))'\' >>$@ - @echo USE_LIBPCRE=\''$(subst ','\'',$(subst ','\'',$(USE_LIBPCRE)))'\' >>$@ - @echo NO_PERL=\''$(subst ','\'',$(subst ','\'',$(NO_PERL)))'\' >>$@ - @echo NO_PYTHON=\''$(subst ','\'',$(subst ','\'',$(NO_PYTHON)))'\' >>$@ - @echo NO_UNIX_SOCKETS=\''$(subst ','\'',$(subst ','\'',$(NO_UNIX_SOCKETS)))'\' >>$@ + @echo SHELL_PATH=\''$(subst ','\'',$(SHELL_PATH_SQ))'\' >$@+ + @echo PERL_PATH=\''$(subst ','\'',$(PERL_PATH_SQ))'\' >>$@+ + @echo DIFF=\''$(subst ','\'',$(subst ','\'',$(DIFF)))'\' >>$@+ + @echo PYTHON_PATH=\''$(subst ','\'',$(PYTHON_PATH_SQ))'\' >>$@+ + @echo TAR=\''$(subst ','\'',$(subst ','\'',$(TAR)))'\' >>$@+ + @echo NO_CURL=\''$(subst ','\'',$(subst ','\'',$(NO_CURL)))'\' >>$@+ + @echo NO_EXPAT=\''$(subst ','\'',$(subst ','\'',$(NO_EXPAT)))'\' >>$@+ + @echo USE_LIBPCRE=\''$(subst ','\'',$(subst ','\'',$(USE_LIBPCRE)))'\' >>$@+ + @echo NO_PERL=\''$(subst ','\'',$(subst ','\'',$(NO_PERL)))'\' >>$@+ + @echo NO_PYTHON=\''$(subst ','\'',$(subst ','\'',$(NO_PYTHON)))'\' >>$@+ + @echo NO_UNIX_SOCKETS=\''$(subst ','\'',$(subst ','\'',$(NO_UNIX_SOCKETS)))'\' >>$@+ ifdef TEST_OUTPUT_DIRECTORY - @echo TEST_OUTPUT_DIRECTORY=\''$(subst ','\'',$(subst ','\'',$(TEST_OUTPUT_DIRECTORY)))'\' >>$@ + @echo TEST_OUTPUT_DIRECTORY=\''$(subst ','\'',$(subst ','\'',$(TEST_OUTPUT_DIRECTORY)))'\' >>$@+ endif ifdef GIT_TEST_OPTS - @echo GIT_TEST_OPTS=\''$(subst ','\'',$(subst ','\'',$(GIT_TEST_OPTS)))'\' >>$@ + @echo GIT_TEST_OPTS=\''$(subst ','\'',$(subst ','\'',$(GIT_TEST_OPTS)))'\' >>$@+ endif ifdef GIT_TEST_CMP - @echo GIT_TEST_CMP=\''$(subst ','\'',$(subst ','\'',$(GIT_TEST_CMP)))'\' >>$@ + @echo GIT_TEST_CMP=\''$(subst ','\'',$(subst ','\'',$(GIT_TEST_CMP)))'\' >>$@+ endif ifdef GIT_TEST_CMP_USE_COPIED_CONTEXT - @echo GIT_TEST_CMP_USE_COPIED_CONTEXT=YesPlease >>$@ + @echo GIT_TEST_CMP_USE_COPIED_CONTEXT=YesPlease >>$@+ endif - @echo NO_GETTEXT=\''$(subst ','\'',$(subst ','\'',$(NO_GETTEXT)))'\' >>$@ - @echo GETTEXT_POISON=\''$(subst ','\'',$(subst ','\'',$(GETTEXT_POISON)))'\' >>$@ + @echo NO_GETTEXT=\''$(subst ','\'',$(subst ','\'',$(NO_GETTEXT)))'\' >>$@+ + @echo GETTEXT_POISON=\''$(subst ','\'',$(subst ','\'',$(GETTEXT_POISON)))'\' >>$@+ ifdef GIT_PERF_REPEAT_COUNT - @echo GIT_PERF_REPEAT_COUNT=\''$(subst ','\'',$(subst ','\'',$(GIT_PERF_REPEAT_COUNT)))'\' >>$@ + @echo GIT_PERF_REPEAT_COUNT=\''$(subst ','\'',$(subst ','\'',$(GIT_PERF_REPEAT_COUNT)))'\' >>$@+ endif ifdef GIT_PERF_REPO - @echo GIT_PERF_REPO=\''$(subst ','\'',$(subst ','\'',$(GIT_PERF_REPO)))'\' >>$@ + @echo GIT_PERF_REPO=\''$(subst ','\'',$(subst ','\'',$(GIT_PERF_REPO)))'\' >>$@+ endif ifdef GIT_PERF_LARGE_REPO - @echo GIT_PERF_LARGE_REPO=\''$(subst ','\'',$(subst ','\'',$(GIT_PERF_LARGE_REPO)))'\' >>$@ + @echo GIT_PERF_LARGE_REPO=\''$(subst ','\'',$(subst ','\'',$(GIT_PERF_LARGE_REPO)))'\' >>$@+ endif ifdef GIT_PERF_MAKE_OPTS - @echo GIT_PERF_MAKE_OPTS=\''$(subst ','\'',$(subst ','\'',$(GIT_PERF_MAKE_OPTS)))'\' >>$@ + @echo GIT_PERF_MAKE_OPTS=\''$(subst ','\'',$(subst ','\'',$(GIT_PERF_MAKE_OPTS)))'\' >>$@+ endif ifdef TEST_GIT_INDEX_VERSION - @echo TEST_GIT_INDEX_VERSION=\''$(subst ','\'',$(subst ','\'',$(TEST_GIT_INDEX_VERSION)))'\' >>$@ + @echo TEST_GIT_INDEX_VERSION=\''$(subst ','\'',$(subst ','\'',$(TEST_GIT_INDEX_VERSION)))'\' >>$@+ endif + @if cmp $@+ $@ >/dev/null 2>&1; then $(RM) $@+; else mv $@+ $@; fi ### Detect Python interpreter path changes ifndef NO_PYTHON -- 2.4.2.668.gc3b1ade.dirty -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
