GCC for Windows 64 & 32 bits

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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

D Park posted a comment on discussion Open Discussion

I was just attempting to use this project for the first time (via msys2). Great work with all you've done! I was compiling TigerVNC and discovered I could get a working winvnc4.exe for Windows 10. However, the same binary on Windows 7 would give a runtime error of "The procedure entry point CreateProcessAsUserA could not be located in the dynamic link library KERNEL32.dll" I tracked this down to the Windows KERNEL32.dll on Windows 10 exports that symbol. However, the KERNEL32.dll on Windows 7 does...

LH_Mouse committed [9c37f6]


LH_Mouse committed [60affb]


LH_Mouse committed [555bee]

sal.h: Add more SAL directives.

LH_Mouse committed [2df3cf]

wdm.h: Add some power framework definitions.

LH_Mouse committed [326560]

driverspecs.h: Add more SAL directives.

LH_Mouse committed [b1487f]

wdm.h: Add some EX_TIMER definitions.

Gianluigi Tiesi created ticket #844

multimonitor api should be enabled only if WINVER >= 0x0500

LH_Mouse committed [1499b9]

crt: update api-ms-win-core-winrt-error-l1-1-1

solemnwarning created ticket #843

Cannot build 32-bit LLVM using 8.1.0