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authorLars Hjemli <hjemli@gmail.com>2008-03-25 01:01:44 +0300
committerLars Hjemli <hjemli@gmail.com>2008-03-25 01:27:12 +0300
commitdf90b51bafec24336cf30339b2978ff6df22b075 (patch)
tree699d232ce635dbac9222e4b9dfc22f60b1aaa788
parent271818693d6803b5df25ee87570808c2a9dbd7e7 (diff)
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--.gitignore1
-rw-r--r--Makefile11
2 files changed, 11 insertions, 1 deletions
diff --git a/.gitignore b/.gitignore
index aa36ff7..1e016e5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,4 @@ cgit
cgit.conf
VERSION
*.o
+*.d
diff --git a/Makefile b/Makefile
index d1950cb..faf7b98 100644
--- a/Makefile
+++ b/Makefile
@@ -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