ok, I downloaded MinGW, set it up, now I get
E:\blitzmax>bmk makemods Compiling:blitz_app.c e:\blitzmax\mod\brl.mod\blitz.mod\blitz_app.c: In function `bbReadStdin': e:\blitzmax\mod\brl.mod\blitz.mod\blitz_app.c:31: error: assignment of read-only location Build Error: failed to compile e:/blitzmax/mod/brl.mod/blitz.mod/blitz_app.c E:\blitzmax>