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 9 has been released

v9.0.0: 2021-05-22

Notable changes:

  • UCRT updates by Biswapriyo Nath
  • Wine updates by Jacek Caban
  • Various new and updated API headers by Biswapriyo Nath and Liu Hao
  • Various UCRT and MSVCRT fixes by Martin Storsjö
  • at_quick_exit implementation by Martin Storsjö
  • dism API by Biswapriyo Nath
  • idl fixes by Steve Lhomme
  • Winpthreads fixes by Liu Hao
  • gettimeofday precision increase by Christian Franke
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

Hernan Martinez created ticket #105

libmscms.a: Add to libarm64

m42a created ticket #945

Memory corruption when detaching an exiting thread while creating a new thread

LH_Mouse posted a comment on ticket #774

If the standard threading library is essential for you, I really really suggest you have a look at https://github.com/lhmouse/mcfgthread; prebuilt binaries are available at https://gcc-mcf.lhmouse.com/.

Johannes Wilde posted a comment on ticket #774

I recently encountered the same problem - however not when using pthread explicitely but the MinGW64 std::condition_variable. A somewhat minimal example is attached. If there is anything I can do so a fix gets implemented - please let me know. Other than that I would like to emphasize the criticality once more: This breaks std-library components!

LH_Mouse committed [afef63]

headers/credentialprovider: Generate H from IDL

LH_Mouse committed [9eff30]

headers: Regenerate Makefile.in

LH_Mouse committed [118b93]

headers: Add credentialprovider.idl

Martin Storsjö committed [aacb65]

cacosh: Use approximation for large input.

Martin Storsjö committed [534480]

casinh: Use approximation for large input.

LH_Mouse committed [619e9c]

include/ws2tcpip: Rectify `addrinfoexA` and `addrinfoexW`