cmake增加編譯宏

通過增加編譯宏實現條件編譯

ADD_DEFINITIONS(-D宏名稱 -D宏名稱......)

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})

源代碼如下:

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

輸出結果: