MSYS2 is a minimalist linux/unix shell environment for Windows.
Quote: "A modern replacement for MSYS bringing recent versions of the GNU toolchains, Git and other common Unix command line tools to the Windows platform"
Do all the steps listed here: http://msys2.github.io/
(troubleshooting guide here: https://github.com/msys2/msys2/wiki/MSYS2-installation )