emscripten: Remove linker only flag from compiler flags

[Squareys]

Hi @mosra !

This is a tiny one: Newer emscripten versions produce a loud warning when using linker-only flags during compilation:

em++: warning: linker setting ignored during compilation: 'WASM' [-Wunused-command-line-argument]

I went ahead and removed it from CMAKE_CXX_FLAGS_INIT.

Best,
Jonathan

[mosra]

Thanks! I was just wondering what's up when I upgraded Emscripten a few days ago. Is it possible that this flag was needed ages ago even for the compiler? I don't remember, honestly.

So I don't need this line either, right?

toolchains/generic/Emscripten.cmake

Line 77 in f03e62a

set(CMAKE_CXX_FLAGS_INIT "-s WASM=0")

[Squareys]

I wouldn't suspect so, since whether generating WASM is only relevant for the byteCode => output step. But I don't know for sure (I assume the CI would have cought it, though).

Yes, that shouldn't be needed either, happy to fix that :)

[mosra]

Tested with a Corrade CI build on an ancient 1.39.6 and it worked, so I guess that confirms everything we need to know :D

Merged as 8847ed0 together with the corresponding change to Emscripten.cmake, thanks! I'll update the submodule in all repos together with the iOS/ARM64 CI changes I'm doing.