I just wanted to share, based on TheGag96's work porting D to devkitarm 3DS, I have successfully ported D to GBA along with D headers for the entirety of libtonc. https://github.com/redthing1/gba_dlang https://beanmachine.alt.icu/post/d_on_gba/ This pretty much gives you drop in, full support for D on GBA (in betterC mode of course).