Use of #if defined in C++ to select a Qt Kit

alsa

Similarly to the directive:

#if defined(linux)
....
#else
...
#endif

used to switch from something for Linux to something for other O.S., how can I set in C++ to switch from a Kit for Embedded System (based on OMAP Embedded to a Kit for Desktop?
#if defined(...what instruction...) ?
OR Can I add a Build Environment variable for my own use and how to use it?

SGaist

Hi,

You can't switch kits from code. It's you that defines which kit to use when you configure Qt Creator.

yuvaram

Hi,
In .pro file you can specify DEFINES as per compilers used.
linux-g++{
DEFINES+= LINUX_DESKTOP
}
win32{
DEFINES += WIN_DESKTOP
}

In .cpp files you can use
#ifdef LINUX_DESKTOP
qDebug()<<"Running in Linux Desktop"<<endl;
#endif
#ifdef WIN_DESKTOP
qDebug()<<"Running in Windows Desktop"<<endl;
#endif
This should help you.

alsa

@yuvaram
Thank you yuvaram, based on your indication I defined my own variable in one of two .pro files for my project that can be compiled using two different kits (for Dektop OR Embedded); thus, checking if it is defined or not, now I'm able to compile the version I'd like.

SGaist

Ok, so it was the other way around, enabling code depending on which platform ?

In that case you don't have to create any defines. You have the Q_OS_XXX defines that you can easily use in your application code.