sdl 1/2 + wasm

[humbertodias]

Changes

• Added support for SDL2 while retaining SDL1 compatibility.
• Added macOS compilation script
• Rockbot_Editor.pro adapted for QT5 on macOS
• Added CONFIG += debug in RockDroid.pro
• Added build-wasm.sh on https://humbertodias.github.io/rockbot/
• Creating sdl_layer to abstract SDL1 and SDL2
• All compilation warnings removed

Tested on Ubuntu 25.04

sdl2-ubuntu.mp4

Tested on macOS Sequoia

sdl2-macos.mp4

Browser - 60fps

[protoman]

Can you make the change optional through a defined macro/flag?
Like #ifdef SDL2 #include <sdl2/sdl.h> #else #incvlude <SDL/sdl.h> #endif
There is a reason I did not port to SDL2 yeat, that are most platforms like PS2, Dingoo, PocketGo and others do not have support for it. I do not want to simply kill those ports yet.
I was working in a kind of abstraction layer to make switching SDL/SDL2/whatever easy like that, but never got much further with the idea.