mingw.org’s MinGW and MSYS

https://osdn.net/projects/mingw/

MinGW from mingw.org is another set of development tools that produce native Windows executables, not dependent on Cygwin’s POSIX emulation DLLs. This is the original MinGW project, nowadays no longer actively developed. Its files can currently be found only via the WWW archive site known as the Wayback Machine. The latest MinGW release files can be found here: https://web.archive.org/web/20210410172202/https://osdn.net/projects/mingw/releases/.

MSYS, which is part of mingw.orgs MinGW, is a POSIX shell and minimal set of tools that are commonly used in configure scripts. Like Cygwin, this environment uses a non-native filesystem mapping to appear more POSIX like to the scripts that it runs. This is intended to complement the MinGW tools to make it easier to port software to Windows.