GCC for Windows 64 & 32 bits

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Mingw-w64 is an advancement of the original mingw.org project, created to support the GCC compiler on Windows systems. It has forked it in 2007 in order to provide support for 64 bits and new APIs. It has since then gained widespread use and distribution.

The development and community are very active and welcoming with new contributors every month and simple installers.

Version 4.0 has been released

  • 32bit ARM thumb software math (Thanks to André Hentschel!).
  • New ftw() support for gcc-5.x support.
  • Experimental printf changes - Ability to print 128bit integers (%I128*) and Decimal Floats (%H, %D), disabled by default. Build the CRT with —-enable-experimental to use.
  • Updated OpenGL 4.5 headers.
  • Better DirectX 11 support.
  • Better Windows 7, 8/8.1 API support.

You can also look at the full list of versions.

Headers, Libraries and Runtime

  • More than a million lines of headers are provided, not counting generated ones, and regularly expanded to track new Windows APIs.
  • Everything needed for linking and running your code on Windows.
  • Winpthreads, a pthreads library for C++11 threading support and simple integration with existing project.
  • Winstorecompat, a work-in-progress convenience library that eases conformance with the Windows Store.
  • Better-conforming and faster math support compared to Visual Studio's.


  • gendef: generate Visual Studio .def files from .dll files.
  • genidl: generate .idl files from .dll files.
  • widl: compile .idl files.

Friend projects

Mingw-w64 interacts a lot with other projects in order to help everyone move forward. Contributions have been going to and coming from these projects:

Most Recent Activity

Mehdi Chinoune created ticket #917

at_quick_exit is broken on UCRT subsystem

Pali posted a comment on ticket #853

Seems that this is a bug in libgomp/gcc project as it incorrectly uses printf format attribute. There is already patch for it: https://github.com/msys2/MINGW-packages-dev/blob/master/mingw-w64-gcc-git/0020-libgomp-Don-t-hard-code-MS-printf-attributes.patch

LH_Mouse committed [586baa]

Revert "dcomp.h: add some missing interfaces"

LH_Mouse committed [564d87]

headers: Add GetHostNameW in winsock2.h

LH_Mouse committed [c0433a]

dcomp.h: add some missing interfaces

Praveen created ticket #176

Latest Windows SDK headers and API support in the MinGW-W64 toolchain

Nicholas Harvey created ticket #174

most recent version of gcc

xoviat created ticket #173

updated version

Martin Storsjö committed [2938ef]

crt: Fix conversion of denormals from 64 bit doubles to 80 bit form

Martin Storsjö committed [6aa945]

Change formatting of double precision floating-points in hexadecimal to match glibc.