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Makefile: autobuild dependency rules
This uses gcc to generate dependency rules for each `.o` file, based on the corresponding `.c` file, into a new set of `.d` files (which are also defined to depend on the same set of source files as their `.o` files). Result: * all objectfile dependencies are correctly calculated * only the necessary dependencies are recalculated when a sourcefile is updated Inspiration for the build rules: * http://www.gnu.org/software/make/manual/make.html#Automatic-Prerequisites * http://make.paulandlesley.org/autodep.html Signed-off-by: Lars Hjemli <hjemli@gmail.com>
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.gitignore
vendored
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.gitignore
vendored
@ -3,3 +3,4 @@ cgit
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cgit.conf
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VERSION
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*.o
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*.d
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11
Makefile
11
Makefile
@ -13,6 +13,13 @@ GIT_URL = http://www.kernel.org/pub/software/scm/git/git-$(GIT_VER).tar.bz2
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-include cgit.conf
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#
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# Define a pattern rule for automatic dependency building
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#
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%.d: %.c
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$(CC) $(CFLAGS) -MM $< | sed -e 's/\($*\)\.o:/\1.o $@:/g' >$@
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EXTLIBS = git/libgit.a git/xdiff/lib.a -lz -lcrypto
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OBJECTS =
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OBJECTS += cache.o
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@ -61,6 +68,8 @@ cgit: $(OBJECTS)
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$(OBJECTS): git/xdiff/lib.a git/libgit.a VERSION
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-include $(OBJECTS:.o=.d)
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git/xdiff/lib.a: | git
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git/libgit.a: | git
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@ -84,7 +93,7 @@ uninstall:
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rm -f $(CGIT_SCRIPT_PATH)/cgit.png
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clean:
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rm -f cgit VERSION *.o
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rm -f cgit VERSION *.o *.d
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cd git && $(MAKE) clean
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distclean: clean
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