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>
Lars Hjemli hjemli@gmail.com
Mon, 24 Mar 2008 23:01:44 +0100
2 files changed,
11 insertions(+),
1 deletions(-)
M
Makefile
→
Makefile
@@ -13,6 +13,13 @@ #
-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 @@ $(CC) $(CFLAGS) -o cgit $(OBJECTS) $(EXTLIBS)
$(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 @@ rm -f $(CGIT_SCRIPT_PATH)/cgit.css
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