From 7c235fe23831802b60ec9d200d0811750e946f76 Mon Sep 17 00:00:00 2001
From: Fabrice Bellard <fabrice@bellard.org>
Date: Wed, 22 Jan 2003 09:53:25 +0000
Subject: [PATCH] dependency handling is consistant with libavcodec

Originally committed as revision 1490 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/Makefile | 22 +++++++++++++---------
 vhook/Makefile       | 15 ++++++++-------
 2 files changed, 21 insertions(+), 16 deletions(-)

diff --git a/libavformat/Makefile b/libavformat/Makefile
index 0ecdcc2cc7..897c4014dd 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -50,17 +50,20 @@ endif
 
 LIB= $(LIBPREF)avformat$(LIBSUF)
 
-DEPS= $(OBJS:.o=.d)
+SRCS := $(OBJS:.o=.c)
 
 all: $(LIB)
 
-$(LIB): $(OBJS)
+$(LIB): .depend $(OBJS)
 	rm -f $@
 	$(AR) rc $@ $(OBJS)
 ifneq ($(CONFIG_OS2),yes)
 	$(RANLIB) $@
 endif
 
+.depend: $(SRCS)
+	$(CC) -MM $(CFLAGS) $^ 1>.depend
+
 installlib: all
 	install -m 644 $(LIB) $(prefix)/lib
 	mkdir -p $(prefix)/include/ffmpeg
@@ -72,15 +75,16 @@ installlib: all
 %.o: %.c
 	$(CC) $(CFLAGS) -c -o $@ $< 
 
-%.d: %.c
-	@echo $@ \\ > $@
-	$(CC) $(CFLAGS) -MM $< >> $@
-
--include $(DEPS)        
-
 # BeOS: remove -Wall to get rid of all the "multibyte constant" warnings
 %.o: %.cpp
 	g++ $(subst -Wall,,$(CFLAGS)) -c -o $@ $< 
 
 clean: 
-	rm -f *.o *.d *~ *.a $(LIB)
+	rm -f *.o *.d .depend *~ *.a $(LIB)
+
+#
+# include dependency files if they exist
+#
+ifneq ($(wildcard .depend),)
+include .depend
+endif
diff --git a/vhook/Makefile b/vhook/Makefile
index 5e9023a6ef..17f8411d7c 100644
--- a/vhook/Makefile
+++ b/vhook/Makefile
@@ -15,7 +15,10 @@ endif
 
 all: $(HOOKS) 
 
-DEPS= $(HOOKS:.so=.d)
+SRCS := $(OBJS:.o=.c)
+
+.depend: $(SRCS)
+	$(CC) -MM $(CFLAGS) $^ 1>.depend
 
 install:
 	install -s -m 755 $(HOOKS) $(INSTDIR)
@@ -26,14 +29,12 @@ imlib2.so: imlib2.o
 %.so: %.o
 	$(CC) -g -o $@ $(SHFLAGS) $<
 
-%.d: %.c
-	@echo $@ \\ > $@
-	$(CC) $(CFLAGS) -MM $< >> $@
-
--include $(DEPS)        
-
 %.html: %.texi
 	texi2html -monolithic -number $<
 
 clean:
 	rm -f *.o *.d *.so *~
+
+ifneq ($(wildcard .depend),)
+include .depend
+endif