SCons

scons是一个Python写的自动化构建工具。每次构建时，会自动执行必要的命令以及重建必要的组件（即整个项目如果只修改了一份源代码文件，将仅重新构建跟这份源代码相关的组件）。

默认构建时，将自动查找当前目录是否存在SConstruct、Sconstruct、sconstruct的文件（依次查找、找到就停），然后执行该文件，也可以使用“-f”选项指定构建文件。

示例

假设当前项目需要用到动态库以及C/C++混编，目录结构如下：

src/a.cpp  src/a.h  src/main.cpp

src/mod0:
b.cpp  b.h

src/mod1:
c.c  c.h

main.cpp

 1 #include "a.h"
 2 #include "b.h"
 3 extern "C"
 4 {
 5 #include "c.h"
 6 }
 7 #include <stdio.h>
 8 
 9 int main()
10 {
11     puts("Hello");
12     A();
13     B();
14     C();
15     return 0;
16 }
View Code

a.h

1 #ifndef _a_H_
2 #define _a_H_
3 void A();
4 #endif
View Code

a.cpp

1 #include "a.h"
2 #include <stdio.h>
3 void A()
4 {
5     puts("A");
6 }
View Code

mod0/b.h

1 #ifndef _b_H_
2 #define _b_H_
3 void B();
4 #endif
View Code

mod0/b.cpp

1 #include "b.h"
2 #include <math.h>
3 #include <stdio.h>
4 void B()
5 {
6     printf("%f\n", log2(1024));
7 }
View Code

mod1/c.h

1 #ifndef _c_H_
2 #define _c_H_
3 void C();
4 #endif
View Code

mod1/c.c

1 #include "c.h"
2 #include <stdio.h>
3 void C()
4 {
5     puts("C");
6 }
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只需要将SConstruct如下编写即可

 1 #! /usr/bin/env python
 2 debug = ARGUMENTS.get('debug', '0')
 3 
 4 cc = 'gcc'
 5 ccflags = ['-D_REENTRANT', '-Wall', '-W', '-mavx2', '-O3']
 6 cpppath = ['src/mod1']
 7 CEnv = Environment(CC=cc, CCFLAGS=ccflags, CPPPATH=cpppath)
 8 csrc = []
 9 for dirs in cpppath:
10     if int(debug) == 1:
11         obj_path = 'obj_debug/'+dirs
12     else:
13         obj_path = 'obj_release/'+dirs
14     VariantDir(obj_path, dirs, duplicate = 0)
15     now_obj = CEnv.Object(Glob(obj_path+'/*.c'))
16     csrc = csrc + now_obj
17 
18 cc = 'g++'
19 ccflags = ['-D_REENTRANT', '-W', '-Werror', '-mavx2', '-std=c++11', '-O3']
20 cpppath = ['src', 'src/mod0', 'src/mod1']
21 libs = ['pthread', 'm']
22 libpath = []
23 ldflags = []
24 
25 target_name = 'outa-r'
26 if int(debug) == 1:
27     ccflags.append('-g')
28     target_name = 'outa-g'
29 
30 env = Environment(CXX=cc, CCFLAGS=ccflags, CPPPATH=cpppath, LIBS=libs, LIBPATH=libpath, LINKFLAGS=ldflags)
31 cppsrc = []
32 for dirs in cpppath:
33     if int(debug) == 1:
34         obj_path = 'obj_debug/'+dirs
35     else:
36         obj_path = 'obj_release/'+dirs
37     VariantDir(obj_path, dirs, duplicate = 0)
38     now_obj = env.Object(Glob(obj_path+'/*.cpp'))
39     cppsrc = cppsrc + now_obj
40 
41 env.Program(target = target_name, source = cppsrc + csrc)
View Code

当需要将静态库加入时，只需要修改“Program”函数的‘source“参数即可