You likely need to remove all mentions of MingW and other GCC based compilers from your system path variable. I would remove the MINGW variable also just to be sure.
It sounds like BlitzMax is using the wrong toolchain so removing all mentions in your system path and environment variables will hopefully allow it to default to the necesary tools (linker and libs) included in it's own install.
It sounds like BlitzMax is using the wrong toolchain so removing all mentions in your system path and environment variables will hopefully allow it to default to the necesary tools (linker and libs) included in it's own install.