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分类: LINUX

2011-02-01 21:16:32

  1 CC=gcc
  2 TARGET=test
  3 SRC=$(wildcard *.c)
  4 
  5 OBJECT= ${SRC:.c=.o}
  6 INCLUDES=-I/usr/include/alsa
  7 LDFLAGS=-lasound
  8 
  9 all:$(TARGET)
 10 
 11 $(OBJECT):$(SRC)
 12         $(CC) -c $(INCLUDES) $<
 13 
 14 $(TARGET):$(OBJECT)
 15         $(CC) -o $@ $< $(LDFLAGS)
 16 
 17 .PHONY:clean
 18 
 19 clean:
 20         @rm -rf $(OBJECT) $(TARGET) *~

Makefile每个命令的第一个字符必须是制表符[tab] 
参考的文章,发表在了csdn上。

源文件保存为test1.c
这是make输出的结果:
root@ubuntu:/home/zhangbin/code/alsatest# make
gcc -c -I/usr/include/alsa test1.c
gcc -o test test1.o -lasound


运行结果:


root@ubuntu:/home/zhangbin/code/alsatest# ./test
ALSA library version: 1.0.22

PCM stream types:
 PLAYBACK
 CAPTURE

PCM access types:
 MMAP_INTERLEAVED
 MMAP_NONINTERLEAVED
 MMAP_COMPLEX
 RW_INTERLEAVED
 RW_NONINTERLEAVED

PCM formats:
 S8 (Signed 8 bit)
 U8 (Unsigned 8 bit)
 S16_LE (Signed 16 bit Little Endian)
 S16_BE (Signed 16 bit Big Endian)
 U16_LE (Unsigned 16 bit Little Endian)
 U16_BE (Unsigned 16 bit Big Endian)
 S24_LE (Signed 24 bit Little Endian)
 S24_BE (Signed 24 bit Big Endian)
 U24_LE (Unsigned 24 bit Little Endian)
 U24_BE (Unsigned 24 bit Big Endian)
 S32_LE (Signed 32 bit Little Endian)
 S32_BE (Signed 32 bit Big Endian)
 U32_LE (Unsigned 32 bit Little Endian)
 U32_BE (Unsigned 32 bit Big Endian)
 FLOAT_LE (Float 32 bit Little Endian)
 FLOAT_BE (Float 32 bit Big Endian)
 FLOAT64_LE (Float 64 bit Little Endian)
 FLOAT64_BE (Float 64 bit Big Endian)
 IEC958_SUBFRAME_LE (IEC-958 Little Endian)
 IEC958_SUBFRAME_BE (IEC-958 Big Endian)
 MU_LAW (Mu-Law)
 A_LAW (A-Law)
 IMA_ADPCM (Ima-ADPCM)
 MPEG (MPEG)
 GSM (GSM)
 SPECIAL (Special)
 S24_3LE (Signed 24 bit Little Endian in 3bytes)
 S24_3BE (Signed 24 bit Big Endian in 3bytes)
 U24_3LE (Unsigned 24 bit Little Endian in 3bytes)
 U24_3BE (Unsigned 24 bit Big Endian in 3bytes)
 S20_3LE (Signed 20 bit Little Endian in 3bytes)
 S20_3BE (Signed 20 bit Big Endian in 3bytes)
 U20_3LE (Unsigned 20 bit Little Endian in 3bytes)
 U20_3BE (Unsigned 20 bit Big Endian in 3bytes)
 S18_3LE (Signed 18 bit Little Endian in 3bytes)
 S18_3BE (Signed 18 bit Big Endian in 3bytes)
 U18_3LE (Unsigned 18 bit Little Endian in 3bytes)
 U18_3BE (Unsigned 18 bit Big Endian in 3bytes)

PCM subformats:
 STD (Standard)

PCM states:
 OPEN
 SETUP
 PREPARED
 RUNNING
 XRUN
 DRAINING
 PAUSED
 SUSPENDED
 DISCONNECTED

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