makefile有強大的自動推導功能,可以將用到相同.h文件的.o文件寫到一起,再優化一下makefile。
原來的makefile:
gyz@debian:~/mc$ cat Makefile
obj=test.o printarr.o
test:$(obj)
gcc -o test $(obj)
test.o:std.h
printarr.o:std.h
.PHONY:clean
clean:
rm test $(obj)
新的makefile:
gyz@debian:~/mc$ cat Makefile
obj=test.o printarr.o
test:$(obj)
gcc -o test $(obj)
$(obj):std.h
.PHONY:clean
clean:
rm test $(obj)
執行:
gyz@debian:~/mc$ make
cc -c -o test.o test.c
cc -c -o printarr.o printarr.c
gcc -o test test.o printarr.o
gyz@debian:~/mc$ ./test
1
2
3
4
5
6
7
8
9
10
gyz@debian:~/mc$ make clean
rm test test.o printarr.o
參考:http://www.cnblogs.com/liangxiaxu/archive/2012/07/31/2617384.html