The "old" MSYS related to the "old" and unsupported MinGW (from
mingw.org) may or may not work properly, so only refer to MSYS2 which
we currently recommend and which has been tested.
The package uses a GNU style build system and requires a Unix style shell.
Windows builds can be created natively with the MinGW-w64 toolchain and
-MSYS environment, or cross-compiled using a MinGW-w64 toolchain:
+MSYS2 environment, or cross-compiled using a MinGW-w64 toolchain:
http://mingw-w64.sourceforge.net/