build: explicitly define dependency files

Groundwork for distcc support in Android build system,
see distcc FAQ for details on why -MF is needed:
http://distcc.googlecode.com/svn/trunk/doc/web/faq.html

diff --git a/core/definitions.mk b/core/definitions.mk
index 5410b11..16064ae 100644 (file)
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -890,7 +890,7 @@ $(hide) $(PRIVATE_CXX) \
        $(PRIVATE_CFLAGS) \
        $(PRIVATE_CPPFLAGS) \
        $(PRIVATE_DEBUG_CFLAGS) \
-       -MD -o $@ $<
+       -MD -MF $(patsubst %.o,%.d,$@) -o $@ $<
 $(transform-d-to-p)
 endef
 
@@ -917,7 +917,7 @@ $(hide) $(PRIVATE_CC) \
        $(PRIVATE_CFLAGS) \
        $(1) \
        $(PRIVATE_DEBUG_CFLAGS) \
-       -MD -o $@ $<
+       -MD -MF $(patsubst %.o,%.d,$@) -o $@ $<
 endef
 
 define transform-c-to-o-no-deps
@@ -978,7 +978,7 @@ $(hide) $(PRIVATE_CXX) \
        $(PRIVATE_CFLAGS) \
        $(PRIVATE_CPPFLAGS) \
        $(PRIVATE_DEBUG_CFLAGS) \
-       -MD -o $@ $<
+       -MD -MF $(patsubst %.o,%.d,$@) -o $@ $<
 $(transform-d-to-p)
 endef
 
@@ -1004,7 +1004,7 @@ $(hide) $(PRIVATE_CC) \
        $(PRIVATE_CFLAGS) \
        $(1) \
        $(PRIVATE_DEBUG_CFLAGS) \
-       -MD -o $@ $<
+       -MD -MF $(patsubst %.o,%.d,$@) -o $@ $<
 endef
 
 define transform-host-c-to-o-no-deps