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cgit.mk: don't rebuild everything if CGIT_VERSION changes

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If CGIT_VERSION is in CGIT_CFLAGS then a change in version (for example
because you have committed your changes) causes all of the CGit objects
to be rebuilt.  Avoid this by using EXTRA_CPPFLAGS to add the version
for only those files that are affected and make them depend on VERSION.

Signed-off-by: John Keeping <john@keeping.me.uk>
This commit is contained in:
John Keeping 2013-03-06 21:22:08 +00:00 committed by Jason A. Donenfeld
parent 1a6feaf5fa
commit d6768a6709
1 changed files with 8 additions and 1 deletions
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9
cgit.mk
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@ -15,7 +15,6 @@ $(CGIT_PREFIX)VERSION: force-version
# CGIT_CFLAGS is a separate variable so that we can track it separately
# and avoid rebuilding all of Git when these variables change.
CGIT_CFLAGS += -DCGIT_VERSION='"$(CGIT_VERSION)"'
CGIT_CFLAGS += -DCGIT_CONFIG='"$(CGIT_CONFIG)"'
CGIT_CFLAGS += -DCGIT_SCRIPT_NAME='"$(CGIT_SCRIPT_NAME)"'
CGIT_CFLAGS += -DCGIT_CACHE_ROOT='"$(CACHE_ROOT)"'
@ -53,6 +52,14 @@ CGIT_OBJ_NAMES += vector.o
CGIT_OBJS := $(addprefix $(CGIT_PREFIX),$(CGIT_OBJ_NAMES))
# Only cgit.c reference CGIT_VERSION so we only rebuild its objects when the
# version changes.
CGIT_VERSION_OBJS := $(addprefix $(CGIT_PREFIX),cgit.o)
$(CGIT_VERSION_OBJS): $(CGIT_PREFIX)VERSION
$(CGIT_VERSION_OBJS): EXTRA_CPPFLAGS = \
-DCGIT_VERSION='"$(CGIT_VERSION)"'
ifeq ($(wildcard $(CGIT_PREFIX).depend),)
missing_dep_dirs += $(CGIT_PREFIX).depend
endif