MinGW

MinGW, a contraction of "Minimalist GNU for Windows", formerly mingw32, is a minimalist development environment for native Microsoft Windows applications.

It provides a complete Open Source programming toolset which is suitable for the development of native MS-Windows applications, and which do not depend on any 3rd-party C-Runtime DLLs. (It does depend on a number of DLLs provided by Microsoft themselves, as components of the operating system; most notable among these is MSVCRT.DLL, the Microsoft C runtime library. Additionally, threaded applications must ship with a freely distributable thread support DLL, provided as part of MinGW itself).

Its compilers provide access to the functionality of the Microsoft C runtime and some language-specific runtimes. MinGW, being Minimalist, does not, and never will, attempt to provide a POSIX runtime environment for POSIX application deployment on MS-Windows. If you want POSIX application deployment on this platform, please consider Cygwin instead.

Primarily intended for use by developers working on the native MS-Windows platform, but also available for cross-hosted use, the app includes:

• A port of the GNU Compiler Collection (GCC), including C, C++, ADA and Fortran compilers;
• GNU Binutils for Windows (assembler, linker, archive manager)
• A command-line installer, with optional GUI front-end, (mingw-get) for MinGW and MSYS deployment on MS-Windows
• A GUI first-time setup tool (mingw-get-setup), to get you up and running with mingw-get.

MSYS, a contraction of "Minimal SYStem", is a Bourne Shell command line interpreter system. Offered as an alternative to Microsoft's cmd.exe, this provides a general-purpose command-line environment, which is particularly suited to use with Min GW, for porting of many Open Source applications to the MS-Windows platform; a light-weight fork of Cygwin-1.3, it includes a small selection of Unix tools, chosen to facilitate that objective.