I want to test out QT WebAssembly for my scientific program. Therefore, I installed emscripten.
$em++ --version
returns
Have you try in the kits tab to set your compiler with this values?
Compiler: C compiler x86 64 e1.38.27_bit C++ compiler x86 64 e1.38.27_bit
Qt version: path to you qmake built with webassembly, for example webassembly binaries or your custom binaries.
Qt mkspec: wasm-emscripten
Hope this information helps, if you face any other problem let me know.