Semi-related, besides TCC, are there any other C-ish compilers that are easily ported to a new ISA any of you can recommend?

Been playing with FPGA softcores, and while writing a compiler can be fun it kinda detracts from the main project.

Perhaps the lightweight qbe compiler backend. [0] There's a C frontend for qbe called cproc. [1][2]

See also this talk [3] which discusses the relative ease of porting qbe, at 11:14.

[0] https://c9x.me/compile/

[1] https://sr.ht/~mcf/cproc/

[2] Official GitHub mirror: https://github.com/michaelforney/cproc

[3] https://spacepub.space/w/pjgvVL74xtFwqnaKuoCXZj?start=11m14s