The main file of metcc is "tcc.c". It certainly can be compiled by MinGW Studio.
In order to compile MenuetOS program you must have start.o, metcc.exe in the same
directory. The command line should be of type "metcc.exe program.c melibc.a -oprogram".
In order to compile "melibc.a" you should configure paths is compile.js and run it.
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─ы ъюьяшы Ўшш melibc эхюсїюфшью чряєёЄшЄ№ ёъЁшяЄ libc/make.cmd
яю єьюыўрэш■ ёўшЄрхЄё ўЄю т яхЁхьхээющ юъЁєцхэш PATH є трё єърчрэ яєЄ№ ъ яръхЄє mingw32
ш ъ рёёхьсыхЁє fasm.
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─ы сюыхх яюфЁюсэ√ї шэёЄЁєъЎшщ юсЁр∙рЄхё№ эр ЇюЁєь т Єхьє
http://meos.sysbin.com/viewtopic.php?t=565&highlight=metcc
For more help go to link above