Test if WebAssembly in C++ code

Mixlu

Hi,
I have an application on Qt 5.13.2, I use MinGW (windows) for development and then I compile it in WebAssembly.
I would like to call different C++ function depending on the compiler (mingw/webassembly), is there a way to do it in C++ files ?

I have seen this but this is for the .pro file :

contains(CONFIG, mingw) {
    
} else {
    contains(CONFIG, wasm) {
       
    }
}

jsulm

@Mixlu Such things are done via

#ifdef SOMETHING
// Do something
#endif

in C++ (https://en.cppreference.com/w/cpp/preprocessor/conditional).

Such defines can be added using https://doc.qt.io/qt-5/qmake-variable-reference.html#defines in qmake:

DEFINES += SOMETHING

Mixlu

@jsulm

Thanks, this is what I was looking for!

SGaist

Hi,

Even simpler use Qt's OS defines: Q_OS_WASM:

#ifdef Q_OS_WASM
// You WASM specific code
#endif