makefile for ffmpeg

  本人开发时的makefile，仅供参考（略去些许细节）

# use pkg-config for getting CFLAGS and LDLIBS
FFMPEG_LIBS=    libavdevice                        \
                libavformat                        \
                libavfilter                        \
                libavcodec                         \
                libswresample                      \
                libswscale                         \
                libavutil                          \
				sdl \

CFLAGS += -Wall -g
INCLUDES:=$(shell pkg-config --cflags libavformat libavcodec libswscale libavutil sdl)
CFLAGS := $(shell pkg-config --cflags $(FFMPEG_LIBS)) $(CFLAGS)
LDFLAGS:=$(shell pkg-config --libs libavformat libavcodec libswscale libavutil libswresample sdl) -lm 
LDLIBS := $(shell pkg-config --libs $(FFMPEG_LIBS)) $(LDLIBS)

EXE:=  muxing.out  demo.out

#OBJS=$(addsuffix .o,$(EXAMPLES))

# the following examples make explicit use of the math library
# decoding_encoding: LDLIBS += -lm
muxing:            LDLIBS += -lm

#.phony: all clean-test clean

#all: $(OBJS) $(EXAMPLES)
all: dirs $(addprefix bin/, $(EXE)) tags

dirs:
	mkdir -p obj
	mkdir -p bin

tags: *.c
	ctags *.c

bin/%.out: obj/%.o
	$(CC) $(CFLAGS) $< $(LDFLAGS) -o $@

obj/%.o : %.c
	$(CC) $(CFLAGS) $< $(INCLUDES) -c -o $@

#clean-test:
	#$(RM) test*.pgm test.h264 test.mp2 test.sw test.mpg

#clean: clean-test
	#$(RM) $(EXAMPLES) $(OBJS)
clean:
	rm -f obj/*
	rm -f bin/*
	rm -f tags