Define full platform.

Hello, I need remote binairy plugin binary download. The I need know at the compilation the platform of my application to download the right plugin architecture.
What's will work:
Windows 32Bits application (.exe) with 32Bits plugin (.dll)
Linux 64Bits elf with plugin elf linux 64Bits (.so)
What's will not work:
Windows 32Bits application (.exe) with 64Bits plugin (.dll)
Windows 64Bits application (.exe) with 32Bits plugin (.dll)
Windows 32Bits application (.exe) with plugin elf linux 64Bits (.so)
Then I need more precise Q_OS_* to download the rights version of my plugin/update/application to load correctly with QPluginLoader.
Exemple what I wish:
Q_OS_LINUX_I586
Q_OS_LINUX_X86_64
Q_OS_WIN32 /Unable to render embedded object: File (\ AND /) not found.\ Q_OS_WIN64
...

Thanks, that's is requirement to all software what have update online and plugin binary online download.