GCC, GFortran, CMake, Make on ReactOS

The GNU compilers, make and CMake are easily available for ReactOS via MinGW. If you haven’t already, disable JavaScript in Firefox browser as ReactOS might hang at 100% CPU on going to SourceForge website. Type about:config in address bar and Toggle javascript.enabled to false.

Use the MinGW install procedure for Windows.

CMake is installed just like on regular Windows. Note that CMake 3.13 or older is used as CMake ≥ 3.14 requires Windows 7 API

MSYS2 doesn’t work on ReactOS since Windows XP is not supported by MSYS2.