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| author |   Lars Hjemli <hjemli@gmail.com> | 2008-03-24 23:01:44 +0100 |
|---|---|---|
| committer | Lars Hjemli <hjemli@gmail.com> | 2008-03-24 23:27:12 +0100 |
| commit | df90b51bafec24336cf30339b2978ff6df22b075 (patch) | |
| tree | 699d232ce635dbac9222e4b9dfc22f60b1aaa788 | |
| parent | Initial Makefile cleanup (diff) | |
| download | cgit-df90b51bafec24336cf30339b2978ff6df22b075.tar.xz cgit-df90b51bafec24336cf30339b2978ff6df22b075.zip | |
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>
| -rw-r--r-- | .gitignore | 1 | ||||
| -rw-r--r-- | Makefile | 11 |
2 files changed, 11 insertions, 1 deletions
@@ -3,3 +3,4 @@ cgit cgit.conf VERSION *.o +*.d @@ -13,6 +13,13 @@ GIT_URL = http://www.kernel.org/pub/software/scm/git/git-$(GIT_VER).tar.bz2 -include cgit.conf +# +# Define a pattern rule for automatic dependency building +# +%.d: %.c + $(CC) $(CFLAGS) -MM $< | sed -e 's/\($*\)\.o:/\1.o $@:/g' >$@ + + EXTLIBS = git/libgit.a git/xdiff/lib.a -lz -lcrypto OBJECTS = OBJECTS += cache.o @@ -61,6 +68,8 @@ cgit: $(OBJECTS) $(OBJECTS): git/xdiff/lib.a git/libgit.a VERSION +-include $(OBJECTS:.o=.d) + git/xdiff/lib.a: | git git/libgit.a: | git @@ -84,7 +93,7 @@ uninstall: rm -f $(CGIT_SCRIPT_PATH)/cgit.png clean: - rm -f cgit VERSION *.o + rm -f cgit VERSION *.o *.d cd git && $(MAKE) clean distclean: clean |