Qt的pro文件里如何判断系统是32位或64位

转载自：http://shitou7630.blog.163.com/blog/static/3269953620161126105156562/

1、解决方案1

QT_ARCH326432-biti386
contains(QT_ARCH, i386) {

2、解决方案2

貌似也有人用QMAKE_TARGET.arch进行判断，但是可能只适用windows,不适合跨平台。

win32 {
## Windows common build here
QMAKE_HOST.arch, x86_64) {

## Windows x86 (32bit) specific build here


## Windows x64 (64bit) specific build here

}
3、解决方案3

利用自定义的字符变量进行判断。

Qt allows you to pass arbitrary config parameters which you can use to separate the targets.

By having a conditional config in your project file:
CONFIG(myX64, myX64|myX32) {

} else {

}

qmake CONFIG+=myX64
you get the wanted result.

4、解决方案4

#Firstly,Set TARGET_ARCH variable.
greaterThan(QT_MAJOR_VERSION, 4) {     TARGET_ARCH=$${QT_ARCH} } else {     TARGET_ARCH=$${QMAKE_HOST.arch} } #Secondly, use TARGET_ARCH to check. contains(TARGET_ARCH, x86_64) {     ARCHITECTURE = x64 } else {     ARCHITECTURE = x86 }

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