Makefile: list standalone program object files in PROGRAM_OBJS

[thirdparty/git.git] / Makefile

diff --git a/Makefile b/Makefile
index 1811a9e74eaec83a83f2803f70a41e03e4d95786..630687f26e6453d2d0c2744f02b92e4a43ec22eb 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -217,6 +217,10 @@ all::
 #   DEFAULT_EDITOR='~/bin/vi',
 #   DEFAULT_EDITOR='$GIT_FALLBACK_EDITOR',
 #   DEFAULT_EDITOR='"C:\Program Files\Vim\gvim.exe" --nofork'
+#
+# Define COMPUTE_HEADER_DEPENDENCIES if your compiler supports the -MMD option
+# and you want to avoid rebuilding objects when an unrelated header file
+# changes.
 
 GIT-VERSION-FILE: FORCE
        @$(SHELL_PATH) ./GIT-VERSION-GEN
@@ -337,6 +341,7 @@ COMPAT_CFLAGS =
 COMPAT_OBJS =
 LIB_H =
 LIB_OBJS =
+PROGRAM_OBJS =
 PROGRAMS =
 SCRIPT_PERL =
 SCRIPT_PYTHON =
@@ -386,12 +391,15 @@ EXTRA_PROGRAMS =
 
 # ... and all the rest that could be moved out of bindir to gitexecdir
 PROGRAMS += $(EXTRA_PROGRAMS)
-PROGRAMS += git-fast-import$X
-PROGRAMS += git-imap-send$X
-PROGRAMS += git-shell$X
-PROGRAMS += git-show-index$X
-PROGRAMS += git-upload-pack$X
-PROGRAMS += git-http-backend$X
+
+PROGRAM_OBJS += fast-import.o
+PROGRAM_OBJS += imap-send.o
+PROGRAM_OBJS += shell.o
+PROGRAM_OBJS += show-index.o
+PROGRAM_OBJS += upload-pack.o
+PROGRAM_OBJS += http-backend.o
+
+PROGRAMS += $(patsubst %.o,git-%$X,$(PROGRAM_OBJS))
 
 TEST_PROGRAMS_NEED_X += test-chmtime
 TEST_PROGRAMS_NEED_X += test-ctype
@@ -1135,11 +1143,12 @@ else
        REMOTE_CURL_PRIMARY = git-remote-http$X
        REMOTE_CURL_ALIASES = git-remote-https$X git-remote-ftp$X git-remote-ftps$X
        REMOTE_CURL_NAMES = $(REMOTE_CURL_PRIMARY) $(REMOTE_CURL_ALIASES)
-       PROGRAMS += $(REMOTE_CURL_NAMES) git-http-fetch$X
+       PROGRAM_OBJS += http-fetch.o
+       PROGRAMS += $(REMOTE_CURL_NAMES)
        curl_check := $(shell (echo 070908; curl-config --vernum) | sort -r | sed -ne 2p)
        ifeq "$(curl_check)" "070908"
                ifndef NO_EXPAT
-                       PROGRAMS += git-http-push$X
+                       PROGRAM_OBJS += http-push.o
                endif
        endif
        ifndef NO_EXPAT
@@ -1159,7 +1168,7 @@ endif
 EXTLIBS += -lz
 
 ifndef NO_POSIX_ONLY_PROGRAMS
-       PROGRAMS += git-daemon$X
+       PROGRAM_OBJS += daemon.o
 endif
 ifndef NO_OPENSSL
        OPENSSL_LIBSSL = -lssl
@@ -1666,18 +1675,58 @@ git.o git.spec \
        $(patsubst %.perl,%,$(SCRIPT_PERL)) \
        : GIT-VERSION-FILE
 
-GIT_OBJS := $(LIB_OBJS) $(BUILTIN_OBJS) $(TEST_OBJS) \
-       git.o http.o http-walker.o remote-curl.o \
-       $(patsubst git-%$X,%.o,$(PROGRAMS))
+GIT_OBJS := $(LIB_OBJS) $(BUILTIN_OBJS) $(PROGRAM_OBJS) $(TEST_OBJS) \
+       git.o http.o http-walker.o remote-curl.o
 XDIFF_OBJS = xdiff/xdiffi.o xdiff/xprepare.o xdiff/xutils.o xdiff/xemit.o \
        xdiff/xmerge.o xdiff/xpatience.o
+OBJECTS := $(GIT_OBJS) $(XDIFF_OBJS)
+
+ASM_SRC := $(wildcard $(OBJECTS:o=S))
+ASM_OBJ := $(ASM_SRC:S=o)
+C_OBJ := $(filter-out $(ASM_OBJ),$(OBJECTS))
+
+ifdef COMPUTE_HEADER_DEPENDENCIES
+dep_dirs := $(addsuffix deps,$(sort $(dir $(OBJECTS))))
+$(dep_dirs):
+       mkdir -p $@
+
+missing_dep_dirs := $(filter-out $(wildcard $(dep_dirs)),$(dep_dirs))
+else
+dep_dirs =
+missing_dep_dirs =
+endif
+
+.SUFFIXES:
 
-%.o: %.c GIT-CFLAGS
-       $(QUIET_CC)$(CC) -o $*.o -c $(ALL_CFLAGS) $<
+$(C_OBJ): %.o: %.c GIT-CFLAGS $(missing_dep_dirs)
+       $(QUIET_CC)$(CC) -o $*.o -c $(dep_args) $(ALL_CFLAGS) $<
 %.s: %.c GIT-CFLAGS FORCE
        $(QUIET_CC)$(CC) -S $(ALL_CFLAGS) $<
-%.o: %.S GIT-CFLAGS
-       $(QUIET_CC)$(CC) -o $*.o -c $(ALL_CFLAGS) $<
+$(ASM_OBJ): %.o: %.S GIT-CFLAGS $(missing_dep_dirs)
+       $(QUIET_CC)$(CC) -o $*.o -c $(dep_args) $(ALL_CFLAGS) $<
+
+ifdef COMPUTE_HEADER_DEPENDENCIES
+# Take advantage of gcc's on-the-fly dependency generation
+# See <http://gcc.gnu.org/gcc-3.0/features.html>.
+dep_files := $(wildcard $(foreach f,$(OBJECTS),$(dir f)deps/$(notdir $f).d))
+ifneq ($(dep_files),)
+include $(dep_files)
+endif
+
+dep_file = $(dir $@)deps/$(notdir $@).d
+dep_args = -MF $(dep_file) -MMD -MP
+else
+dep_args =
+
+# Dependencies on header files, for platforms that do not support
+# the gcc -MMD option.
+#
+# Dependencies on automatically generated headers such as common-cmds.h
+# should _not_ be included here, since they are necessary even when
+# building an object for the first time.
+#
+# XXX. Please check occasionally that these include all dependencies
+# gcc detects!
 
 $(GIT_OBJS): $(LIB_H)
 builtin-branch.o builtin-checkout.o builtin-clone.o builtin-reset.o branch.o transport.o: branch.h
@@ -1693,10 +1742,10 @@ builtin-pack-objects.o: thread-utils.h
 http-fetch.o http-walker.o remote-curl.o transport.o walker.o: walker.h
 http.o http-walker.o http-push.o remote-curl.o: http.h
 
-
 xdiff-interface.o $(XDIFF_OBJS): \
        xdiff/xinclude.h xdiff/xmacros.h xdiff/xdiff.h xdiff/xtypes.h \
        xdiff/xutils.h xdiff/xprepare.h xdiff/xdiffi.h xdiff/xemit.h
+endif
 
 exec_cmd.s exec_cmd.o: ALL_CFLAGS += \
        '-DGIT_EXEC_PATH="$(gitexecdir_SQ)"' \
@@ -2004,6 +2053,7 @@ clean:
        $(RM) $(ALL_PROGRAMS) $(BUILT_INS) git$X
        $(RM) $(TEST_PROGRAMS)
        $(RM) -r bin-wrappers
+       $(RM) -r $(dep_dirs)
        $(RM) *.spec *.pyc *.pyo */*.pyc */*.pyo common-cmds.h TAGS tags cscope*
        $(RM) -r autom4te.cache
        $(RM) config.log config.mak.autogen config.mak.append config.status config.cache