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How can I detect in the .pro file if I am compiling on a 32 bit or a 64 bit platform?
You can use QMAKE_HOST.arch for this. The QMAKE_HOST variable expresses host information about the machine running qmake and QMAKE_HOST.arch allows you to determine the target architecture. You can use it as follows:
- win32-g++:contains(QMAKE_HOST.arch, x86_64):{
- do something
- }
2 comments
May 3, 2011
Robot Herder
If I understand things correctly, QMAKE_HOST.arch will tell you if you are compiling on a 32 or 64 bit platform, which is not necessarily the same as the platform you are compiling for, right?
May 4, 2011
Hobby Entomologist
That’s correct. You can use QMAKE_TARGET.arch to decide the platform you are building for. We have added the following FAQ [developer.qt.nokia.com] for this now: