Finally i have success :) This .sh file compiles w/o problems ------------------------------------------------------------ export GAMBCDIR_INCLUDE=/usr/local/Gambit-C/include/ export GAMBCDIR_LIB=/usr/local/Gambit-C/lib gsc -link t.scm export BUILD_EXE_OUTPUT_FILENAME=t.exe export BUILD_EXE_INPUT_FILENAMES="t.c t_.c" sh gambc-cc.bat exe ------------------------------------------------------------ Important: BUILD_EXE_INPUT_FILENAMES should be between quotes. The 'sh' required before gambc-cc.bat Anyway using gambc-cc.bat directly is not the right way i believe.