about summary refs log tree commit diff stats
diff options
context:
space:
mode:
authorLars Hjemli2008-03-24 23:01:44 +0100
committerLars Hjemli2008-03-24 23:27:12 +0100
commitdf90b51bafec24336cf30339b2978ff6df22b075 (patch)
tree699d232ce635dbac9222e4b9dfc22f60b1aaa788
parentInitial Makefile cleanup (diff)
downloadcgit-df90b51bafec24336cf30339b2978ff6df22b075.tar.gz
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--.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
3cgit.conf 3cgit.conf
4VERSION 4VERSION
5*.o 5*.o
6*.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
13-include cgit.conf 13-include cgit.conf
14 14
15 15
16#
17# Define a pattern rule for automatic dependency building
18#
19%.d: %.c
20 $(CC) $(CFLAGS) -MM $< | sed -e 's/\($*\)\.o:/\1.o $@:/g' >$@
21
22
16EXTLIBS = git/libgit.a git/xdiff/lib.a -lz -lcrypto 23EXTLIBS = git/libgit.a git/xdiff/lib.a -lz -lcrypto
17OBJECTS = 24OBJECTS =
18OBJECTS += cache.o 25OBJECTS += cache.o
@@ -61,6 +68,8 @@ cgit: $(OBJECTS)
61 68
62$(OBJECTS): git/xdiff/lib.a git/libgit.a VERSION 69$(OBJECTS): git/xdiff/lib.a git/libgit.a VERSION
63 70
71-include $(OBJECTS:.o=.d)
72
64git/xdiff/lib.a: | git 73git/xdiff/lib.a: | git
65 74
66git/libgit.a: | git 75git/libgit.a: | git
@@ -84,7 +93,7 @@ uninstall:
84 rm -f $(CGIT_SCRIPT_PATH)/cgit.png 93 rm -f $(CGIT_SCRIPT_PATH)/cgit.png
85 94
86clean: 95clean:
87 rm -f cgit VERSION *.o 96 rm -f cgit VERSION *.o *.d
88 cd git && $(MAKE) clean 97 cd git && $(MAKE) clean
89 98
90distclean: clean 99distclean: clean