Qt中实现条件编译

//test.pro
TEMPLATE = app
CONFIG += console
CONFIG -= app_bundle
CONFIG -= qt

SOURCES += main.c

DEFINES += **Home**
#DEFINES += Ultimate

include(deployment.pri)
qtcAddDeployment()

#include <stdio.h>

#ifdef Home
#define LOG(s) printf("[%s: %d] %s",__FILE__,__LINE__,s)
#else
#define LOG(s) NULL
#endif

#ifdef Ultimate
void f()
{
printf("This is Ultimate version\n");
}
#else
void f()
{

}
#endif

int main(void)
{
LOG("Enter main...\n");

f();
printf("1.Hi.\n");
printf("2.Hello.\n");

#ifdef Ultimate
printf("3.Bye.\n");
printf("4.See U.\n");
#else
printf("3.GoodBye.\n");
#endif

LOG("Exit main...\n");

return 0;
}

输出：

[..\test\main.c: 23] Enter main…

1.Hi.

2.Hello.

3.GoodBye.

[..\test\main.c: 36] Exit main…

若修改test.pro中的

//test.pro
...
#DEFINES += Home
DEFINES += Ultimate
...

则输出为：

This is Ultimate version

1.Hi.

2.Hello.

3.Bye.

4.See U.