cmake增加编译宏

通过增加编译宏实现条件编译

ADD_DEFINITIONS(-D宏名称 -D宏名称......)

camke文件如下:

1.  
   cmake_minimum_required(VERSION 2.8)
2.  
   PROJECT (hello)
3.  
   SET(SRC_LIST main.c)
4.  
   MESSAGE(STATUS "This is BINARY dir " ${HELLO_BINARY_DIR})
5.  
   MESSAGE(STATUS "This is SOURCE dir " ${HELLO_SOURCE_DIR})
6.  
   add_definitions(-Dhha -Dbbb)
7.  
   ADD_EXECUTABLE(hello ${SRC_LIST})

源代码如下:

1.  
   #include<stdio.h>
2.  
   int main()
3.  
   {
4.  
   #ifdef hha
5.  
   printf("include hhahah. ");
6.  
   #endif
7.  
   #ifdef bbb
8.  
   printf("include bbbbbb. ");
9.  
   #endif
10.  
    printf("hello,word. ");
11.  
    return 0;
12.  
    }

输出结果: