add proper dependancies on the xdiff source

We are not rebuilding the xdiff library when its header files change.
Add dependancies for those to the main Makefile.

Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Acked-by: Ryan Anderson <ryan@google.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/Makefile b/Makefile
index 2c7c33855e34a214d63a2745c3861c1e31743fbf..66c8b4b127cc5c0380ab7d8cb5f4d1dcb89b18a7 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -760,6 +760,8 @@ $(LIB_FILE): $(LIB_OBJS)
        rm -f $@ && $(AR) rcs $@ $(LIB_OBJS)
 
 XDIFF_OBJS=xdiff/xdiffi.o xdiff/xprepare.o xdiff/xutils.o xdiff/xemit.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
 
 $(XDIFF_LIB): $(XDIFF_OBJS)
        rm -f $@ && $(AR) rcs $@ $(XDIFF_OBJS)