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| author |  Junio C Hamano <gitster@pobox.com> | 2011-10-05 12:36:16 -0700 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2011-10-05 12:36:16 -0700 |
| commit | 7af4d3468f79c39a75e59aa9699d43d1bbbfd1af (patch) | |
| tree | 7f3c8ce64ad79f38ed0f54a0bfedd3519d5e3c82 | |
| parent | Merge branch 'ms/patch-id-with-overlong-line' (diff) | |
| parent | Makefile: Use computed header dependencies if the compiler supports it (diff) | |
| download | tgif-7af4d3468f79c39a75e59aa9699d43d1bbbfd1af.tar.xz | |
Merge branch 'fk/make-auto-header-dependencies'
* fk/make-auto-header-dependencies:
Makefile: Use computed header dependencies if the compiler supports it
| -rw-r--r-- | Makefile | 13 |
1 files changed, 9 insertions, 4 deletions
@@ -250,10 +250,6 @@ all:: # DEFAULT_EDITOR='$GIT_FALLBACK_EDITOR', # DEFAULT_EDITOR='"C:\Program Files\Vim\gvim.exe" --nofork' # -# Define COMPUTE_HEADER_DEPENDENCIES if your compiler supports the -MMD option -# and you want to avoid rebuilding objects when an unrelated header file -# changes. -# # Define CHECK_HEADER_DEPENDENCIES to check for problems in the hard-coded # dependency rules. # @@ -1242,6 +1238,15 @@ endif ifdef CHECK_HEADER_DEPENDENCIES COMPUTE_HEADER_DEPENDENCIES = USE_COMPUTED_HEADER_DEPENDENCIES = +else +ifndef COMPUTE_HEADER_DEPENDENCIES +dep_check = $(shell sh -c \ + '$(CC) -c -MF /dev/null -MMD -MP -x c /dev/null -o /dev/null 2>&1; \ + echo $$?') +ifeq ($(dep_check),0) +COMPUTE_HEADER_DEPENDENCIES=YesPlease +endif +endif endif ifdef COMPUTE_HEADER_DEPENDENCIES |