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 4.0 has been released

  • 32bit ARM thumb software math (Thanks to André Hentschel!).
  • New ftw() support for gcc-5.x support.
  • Experimental printf changes - Ability to print 128bit integers (%I128*) and Decimal Floats (%H, %D), disabled by default. Build the CRT with —-enable-experimental to use.
  • Updated OpenGL 4.5 headers.
  • Better DirectX 11 support.
  • Better Windows 7, 8/8.1 API support.

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

Jonathan Yong committed [83bf4d]

virtdisk.h: Update in accordance to Win10 API

Jonathan Yong committed [e0dc38]

Add Win10 _WIN32_WINNT values

stephane posted a comment on ticket #116

HI jonathan, the last virtdisk.h and the last virtdisk.def,that I have uploaded here...

Jonathan Yong posted a comment on ticket #116

Let me know when you've found something (or a finalized patch to send to the mailing...

stephane posted a comment on ticket #116

libvirtdisk is perfect to backup hyper-v virtual disks under windows 8,10 (or 2012).vss...

stephane posted a comment on ticket #116

Hi , I will add the test of the windows version in my app and it 's better not to...

lolwat modified a comment on ticket #481

Can corfirm it’s working with GCC 6.1.0 from msys2. This bug can be closed.

lolwat posted a comment on ticket #481

Can corfirm it’s working with GCC 6.1.0 from msys2.

Martchus created ticket #548

Use of stringstream in DLL causes page fault

niXman modified ticket #543

error: ‘to_string’ is not a member of ‘std’