6 - set "PATH=C:\msys64\usr\bin;%PATH%"
7 - bash -lc "pacman --noconfirm --needed -Sy bash pacman pacman-mirrors msys2-runtime msys2-runtime-devel"
11 pacman --noconfirm -Su
12 pacman --noconfirm --needed -S base-devel mingw-w64-x86_64-{toolchain,clang,cmake,gtk2,gtkglext}
25 cmake -H. -Bbuild -G 'MSYS Makefiles' -DGTK2_GLIBCONFIG_INCLUDE_DIR=/mingw64/lib/glib-2.0/include -DGTK2_GDKCONFIG_INCLUDE_DIR=/mingw64/lib/gtk-2.0/include