GCC for Windows 64 & 32 bits


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 8 has been released

v8.0.0: 2020-09-18

Notable changes:

  • New Hyper-V headers and libraries by Biswapriyo Nath
  • Many headers updated from Wine by Jacek Caban.
  • ARM math improvements by Martin Storsjö
  • floating point fixes by Liu Hao
  • many *printf compatibility fixes by Liu Hao and Martin Storsjö
  • massive Windows App Store API updates by Steve Lhomme
  • winstorecompat library updates by Martin Storsjö
  • __USE_MINGW_ANSI_STDIO now automatically enabled in C99 and C11 mode when not using UCRT by Pali Rohár
  • wdm and ddk updates by Zebediah Figura
  • UCRT for Windows Store Apps (-lucrtapp) by Martin Storsjö
  • Audioclient and ActivateAudioInterfaceAsync API updates by Liu Hao
  • DirectX SDKs are now always installed
And many other additions thanks to, but not limited to (in Alphabetical order)

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

Wang Xi'ao posted a comment on discussion Open Discussion

the 'latest' gcc version of MinGW-w64 - for 32 and 64 bit Windows is 8.1.0, which was released in 2018. And where is the next gcc release?

Long Nguyen created ticket #866

winpthreads: WINPTHREAD_API after type name causes errors in MSVC

Jonathan Wakely posted a comment on ticket #643

This seems to have been fixed for _stat and _wstat but not for _wstat64. Is that intentional?

LH_Mouse committed [b3c33c]

headers: Add missing APIs in realtimeapiset.h.

LH_Mouse committed [f5d774]

headers: Add missing APIs in winnls.h.

Crazy Gamer posted a comment on discussion Help

I moved the -windows and -console arguments from the compiler options to the linker options and everything was resolved. And under Windows like and so worked :)

Martin Storsjö committed [096cd1]

crt: Simplify msvcrt.dll arm workarounds for __initenv

Martin Storsjö committed [64cb5e]

headers: Add a declaration of ___lc_codepage_func

Martin Storsjö committed [6576aa]

crt: Regenerate Makefile.in

Fabian Keßler created ticket #865

The returnvalue of std::filesystem::path::string::c_str() is incompatible to std::f_open