MSYS2 Environment Settings

After installation, the package's variables indicate which MSYS2 Environment is active.

• msys2:msystem (exported as MSYSTEM) is the MSYS2 Environment Name.
• msys2:carch (exported as MSYSTEM_CARCH) is the compiler's target architecture (i686, x86_64 or aarch64),
• msys2:chost (exported as MSYSTEM_CHOST and MINGW_CHOST) is the compiler's target triplet ("%{msys2:carch}%-w64-mingw32").
• msys2:root (exported as MSYSTEM_PREFIX and MINGW_PREFIX) is the Unix path to the root of the MSYS2 Environment.
• msys2:package-prefix (exported as MINGW_PACKAGE_PREFIX) is the prefix used for MSYS2 Pacman packages for this Environment.

Additionally, Path, MANPATH and INFOPATH are all updated with the appropriate directories from msys2:root. PKGCONFIG_PATH, PKG_CONFIG_SYSTEM_INCLUDE_PATH, PKG_CONFIG_SYSTEM_LIBRARY_PATH and ACLOCAL_PATH are all _set to the appropriate values for msys2:root. Finally, CONFIG_SITE is exported as /etc/config.site as per MSYS2's own configuration.

See https://www.msys2.org/docs/environments/ for further information.