QMAKE. How to figure out host platform and target platform when cross compiling QT projects

Question

I compiling for QNX, ARM, My Host platform can be Win32/64 , Linux or Mac I want to find a way to see wheat is my host platform in my PRO file (on computer I building my project)

Apparently using:

win32 {}
unix {}
macx {}

does not work because on different OSes it will always report unix, so I assume this is target platform So what is the way to obtain current host platform to make PRO file flexible because on different platform I would like to do different things.

Thank you

Answer 1

Could not get anything better then:

QMAKE_SPEC_T = $$[QMAKE_SPEC]

contains(QMAKE_SPEC_T,.*win32.*){
    HOST_PLATFORM=WIN
    IS_WIN = 1
}

contains(QMAKE_SPEC_T,.*macx.*){
    HOST_PLATFORM=MAC
    IS_MAC = 1
}

contains(QMAKE_SPEC_T,.*linux.*){
    HOST_PLATFORM=LINUX
    IS_LINUX = 1
}

and then anywhere to check:

!isEmpty(IS_WIN):message($${HOST_PLATFORM})
!isEmpty(IS_MAC):message($${HOST_PLATFORM})
!isEmpty(IS_LINUX):message($${HOST_PLATFORM})