Hi. I'm away from my PC to help with that since my dev environment was built over MySys too.
The instructions to build wings3d here in the forum are a little old. But, you may have noticed in the source repository there are two files starting with BUILD. - one for Windows and other for Linux / OSX. They have instructions about how to build wings3d for each environment.
Something I remember is that for Windows you may not to need to build the club module. If it's not present the script to build wings3d will download a pre-built version of it.
The instructions to build wings3d here in the forum are a little old. But, you may have noticed in the source repository there are two files starting with BUILD. - one for Windows and other for Linux / OSX. They have instructions about how to build wings3d for each environment.
Something I remember is that for Windows you may not to need to build the club module. If it's not present the script to build wings3d will download a pre-built version of it.