AUtomatic dependency generation. Runs on Linux (at least). Probably should

update .cvsignore (somehere) to exclude .d files

Originally committed as revision 1459 to svn://svn.ffmpeg.org/ffmpeg/trunk

Makefile

@@ -54,9 +54,12 @@ endif
 
 OBJS = ffmpeg.o ffserver.o
 SRCS = $(OBJS:.o=.c) $(ASM_OBJS:.o=.s)
+DEPS = $(OBJS:.o=.d)
 
 all: lib $(PROG) $(VHOOK)
 
+-include $(DEPS)
+
 lib:
 	$(MAKE) -C libavcodec all
 	$(MAKE) -C libavformat all
@@ -80,6 +83,10 @@ ffplay: ffmpeg$(EXE)
 %.o: %.c
 	$(CC) $(CFLAGS) -c -o $@ $< 
 
+%.d: %.c
+	@echo $@ \\ > $@
+	$(CC) $(CFLAGS) -MM $< >> $@
+
 videohook:
 	$(MAKE) -C vhook all
 
@@ -108,7 +115,7 @@ clean: $(CLEANVHOOK)
 	$(MAKE) -C libavcodec clean
 	$(MAKE) -C libavformat clean
 	$(MAKE) -C tests clean
-	rm -f *.o *~ .depend gmon.out TAGS ffmpeg_g$(EXE) $(PROG) 
+	rm -f *.o *.d *~ .depend gmon.out TAGS ffmpeg_g$(EXE) $(PROG) 
 
 clean-vhook:
 	$(MAKE) -C vhook clean