Just ARM for now, and support for certain memory protection restrictions that iOS imposes. Honestly, I really didn't do much other than tweak the Makefile, modifying a call to mprotect, and rearrange some deallocation code. TCC doesn't support Mach-O yet, and that's not something that I have enough expertise to support, so all execution is done by JITing an ELF binary in memory as it's done on macOS.