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Makefile: disable default implicit rules

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The git makefile never uses any default implicit rules.
Unfortunately, if a prerequisite for one of the intended rules is
missing, a default rule can be used in its place:

	$ make var.s
	    CC var.s
	$ rm var.c
	$ make var.o
	    as   -o var.o var.s

Avoiding the default rules avoids this hard-to-debug behavior.
It also should speed things up a little in the normal case.

Future patches may restrict the scope of the %.o: %.c pattern.
This patch would then ensure that for targets not listed, we do
not fall back to the default rule.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
This commit is contained in:
Jonathan Nieder 2010-01-26 09:51:24 -06:00
parent beeb4564bb
commit 30248886ce
1 changed files with 2 additions and 0 deletions
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Makefile
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@ -1672,6 +1672,8 @@ GIT_OBJS := $(LIB_OBJS) $(BUILTIN_OBJS) $(TEST_OBJS) \
XDIFF_OBJS = xdiff/xdiffi.o xdiff/xprepare.o xdiff/xutils.o xdiff/xemit.o \
xdiff/xmerge.o xdiff/xpatience.o
.SUFFIXES:
%.o: %.c GIT-CFLAGS
$(QUIET_CC)$(CC) -o $*.o -c $(ALL_CFLAGS) $<
%.s: %.c GIT-CFLAGS FORCE