don't include system headers in dependency files

System library headers are not strictly part of our build. If they are
changing beneath our feet, then we probably have bigger problems.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Suggested-by: Mike Frysinger <vapier@gentoo.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

diff --git a/common.mk b/common.mk
index 7c09ab0a46d0ed91f6d85ac8da5b69cec686e66f..6bfe8de859537a7a3ee8841259afe94c4cbe06de 100644 (file)
--- a/common.mk
+++ b/common.mk
@@ -80,7 +80,7 @@ ifneq ($(BUILDDIR),$(CURDIR))
        $(Q)mkdir -p $(dir $@)
 endif
        $(call BECHO,CC)
-       $(Q)$(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $< -g -MD -MF $(BUILDDIR)/.$(<F).dep
+       $(Q)$(CC) $(CPPFLAGS) $(CFLAGS) -c -o $@ $< -g -MMD -MF $(BUILDDIR)/.$(<F).dep
 
 .SUFFIXES: