Install MSYS2 on Windows

MinGW brings GNU compiler tools to Windows since the late 1990s. MSYS2 provides numerous developer tools including MinGW on Windows using pacman package manager.

Install

Download msys2-x86_64-*.exe and run the installer, installing to C:/msys64. MSYS2 needs to be on a non-FAT / non-ExFAT drive capable of symbolic links, such as C:.

Start the MSYS2 console in the Windows Start menu, which sets up all the needed paths, just for that terminal session. Update MSYS2 to get the latest packages in the MSYS2 terminal. Run this command multiple times until it says “nothing to do”.

pacman -Syuu

Console

To use MSYS2 / MinGW64 programs from PowerShell without disrupting other compiler use, we create ~/gcc.ps1 containing:

$Env:CC="gcc"
$Env:FC="gfortran"
$Env:CXX="g++"
$Env:path += ";c:/msys64/mingw64/bin/"

When it’s desired to use MSYS from a Powershell prompt run ~/gcc.ps1.

If you add MSYS to the Windows system path or user path for all sessions, this can disrupt other compilers including Intel compilers. Thus as usual we only temporarily use MSYS upon request via the ~/gcc.ps1 script.

Usage

From MSYS2 command prompt, tasks include:

Search for packages:

pacman -Ss gcc

Install MinGW packages

  • gcc: pacman -S mingw64/mingw-w64-x86_64-gcc
  • gfortran: pacman -S mingw64/mingw-w64-x86_64-gcc-fortran
  • HDF5: pacman -S mingw64/mingw-w64-x86_64-hdf5
  • ninja: pacman -S mingw64/mingw-w64-x86_64-ninja
  • make: pacman -S mingw64/mingw-w64-x86_64-make
  • pkg-config: pacman -S mingw64/mingw-w64-x86_64-pkg-config
  • aspell: pacman -S mingw64/mingw-w64-x86_64-aspell mingw64/mingw-w64-x86_64-aspell-en

If you have confusion about why another version of a program is being used, check executable location like:

where gcc

You may need to reorder directories in your Windows Path variable, for example GNU Octave may need to be moved lower in the Path list or removed from Path.

Notes