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

qcfium posted a comment on discussion Open Discussion

The image says it all. Expected output is 1. This doesn't happen on the normal MinGW gcc. Also, if I remove the linebreak at the start of t.txt or change the two 4097 to 4096 or less, it will be solved.

WolfG posted a comment on discussion Help

Greetings, I need to link with windows 64 bit .lib libraries, howener I get unresolved symbols. The library file is: D:\OpenCV\install\x64\vc15\lib\opencv_world400.lib How can I do this?

Jacek Caban committed [ec4dc4]

Update imported headers to Wine 4.2.

Jacek Caban committed [0e1da6]

Update widl to Wine 4.2.

Full name created ticket #789

Installer sucks

LH_Mouse committed [6cf35b]

Add missed OLE DB identifiers (addition)

Maarten created ticket #788

_O_RDONLY, _S_IWRITE, ... are undeclared (when compiling binutils)

Martin Storsjö committed [92ad48]

crt: add def for dcomp.dll and update dcomp.h

LH_Mouse modified ticket #786

Overwhelming number of "optimization attribute" warnings

LH_Mouse posted a comment on ticket #786

Nice. Looks like someone has been working on it. Closing this for now.