| author | Lars Hjemli <hjemli@gmail.com> | 2008-03-24 22:01:44 (UTC) |
|---|---|---|
| committer | Lars Hjemli <hjemli@gmail.com> | 2008-03-24 22:27:12 (UTC) |
| commit | df90b51bafec24336cf30339b2978ff6df22b075 (patch) (side-by-side diff) | |
| tree | 699d232ce635dbac9222e4b9dfc22f60b1aaa788 | |
| parent | 271818693d6803b5df25ee87570808c2a9dbd7e7 (diff) | |
| download | cgit-df90b51bafec24336cf30339b2978ff6df22b075.zip cgit-df90b51bafec24336cf30339b2978ff6df22b075.tar.gz cgit-df90b51bafec24336cf30339b2978ff6df22b075.tar.bz2 | |
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
@@ -5 +5,2 @@ VERSION *.o +*.d @@ -15,2 +15,9 @@ GIT_URL = http://www.kernel.org/pub/software/scm/git/git-$(GIT_VER).tar.bz2 +# +# 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 @@ -63,2 +70,4 @@ $(OBJECTS): git/xdiff/lib.a git/libgit.a VERSION +-include $(OBJECTS:.o=.d) + git/xdiff/lib.a: | git @@ -86,3 +95,3 @@ uninstall: clean: - rm -f cgit VERSION *.o + rm -f cgit VERSION *.o *.d cd git && $(MAKE) clean |