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 6 has been released

v6.0.0: 2018-09-17

Notable changes:

  • C++ __cxa_atexit thanks to Martin Storsjö and Liu Hao
  • Massive additions to support UCRT thanks to Martin Storsjö
  • Sync COM interface headers with Wine development thanks to Jacek Caban
  • WinRT additions thanks to Hugo Beauzée-Luyssen
  • ARM32 and ARM64 additions thanks to Martin Storsjö
  • CRT library api-ms-win-core additions thanks to Martin Storsjö
  • CRT library def file reorganization thanks to Martin Storsjö
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

Martin Storsjö committed [dc348c]

crt: Correct the availability for __C_specific_handler

Scott Willis posted a comment on ticket #89

Would you be willing to point to one or more of those?

Scott Willis posted a comment on discussion Help

Hi, sorry if this is documented somewhere. We need to build the same code for ARM via GCC (embedded target system) and for Windows via MinGW-w64 (unit tests). We would like to update our GCC version, however we need a corresponding MinGS-w64 version. How can I determine what GCC version any particular MinGW-w64 release corresponds to? Thanks in advance!

Scott Willis posted a comment on discussion Help

You are on Windows? Probably involves modifying your Path, either global system configuration (a dubious approach) or in Eclipse: in the project properties, C/C++ Build > Environment modify the PATH environment variable, selecting either Append or Replace using the radio buttons at bottom.

Jean-Baptiste Kempf committed [d67540]

winstorecompat: Add RtlRestoreContext stub

Jean-Baptiste Kempf committed [f7b2fe]

winstorecompat: Regenerate Makefile.in

Jonathon Reinhart created ticket #777

ddk/ntifs.h error: flexible array member in union

Jonathon Reinhart created ticket #776

redefinition of ‘_InterlockedAdd64’ in wdm.h

Rokas Kupstys created ticket #775

Linking dbghelp imports all unused API

LH_Mouse committed [5a88de]

include/evntrace.h: Add new datatypes and definitions