Scratch that, McPixel 3 crashes on Haiku. If y'all need any help or support, reach out. alex :at: terarocket.io
It looks like you're statically linking libSDL2 into mcpixel. We have some patches for our official port of 2.0.x fixing various upstream bugs you might need...
https://github.com/haikuports/haikuports/blob/master/media-libs/libsdl2/patches/