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 5 has been released

v5.0.4: 2018-06-04

  • Fix gcc-8.1.0 compatibility regarding _xgetbv
  • %e printf specifier will now produce at least 2 digits for the exponent.

initial v5 Release: 2016-10-19

  • Fixes to the __mingw_printf family of functions.
  • DirectX updates from Wine.
  • Various updates to support Windows 7 and 10.
  • Various header typo fixes.

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

Daniel Starke created ticket #751

Missing and wrong types in ws2tcpip.h

Jacek Caban committed [49ca7c]

stddef.h: Avoid max_align_t declaration conflict with clang stddef.h.

Martin Storsjö committed [710b8e]

winstorecompat: Don't build RtlAddFunctionTable on IA-32

Martin Storsjö posted a comment on ticket #747

This seems to have been a known issue in 2.30, which should be fixed in 2.31 which should be out pretty soon, see the binutils mailing list link in the previous post.

Martin Storsjö committed [d0607a]

winstorecompat: Fix EnumProcessModule

Martin Storsjö committed [0e1f41]

winstorecompat: Add an implementation of EnumProcessModules

Martin Storsjö committed [868fe2]

crt: Split wassert.c into a separate assert.c

Martin Storsjö committed [17e239]

crt: Regenerate Makefile.in

Martin Storsjö committed [787a53]

crt: Share libwindowsapp.a, libruntimeobject.a and libsynchronization.a between lib64, libarm32 and libarm64

Martin Storsjö committed [f3a6db]

crt: Avoid using _mbslen in misc/wcsto{f,ld}.c