Dear All, I wanted to enquire about the prospects for updating the version of MinGW which ships with the Windows binary distribution of GHC. The version included as of 7.8.2 is now several years old and in some cases I've found that it's incompatible with the libraries produced by newer versions of MinGW (as to be expected, per my understanding). Specifically, my HsQML binding for Qt can't be used with the libraries from the official Windows binary distribution of Qt 5 because the resulting executables crash on start-up with runtime incompatibilities. I'm in the process of trying to build out-of-the-box compatible Qt binaries against GHC's MinGW, but Qt's stated minimum requirements on the tool-chain version aren't encouraging. The only way I currently have of making this work is for users to edit their GHC settings file to point GHC at a version of gcc.exe from a newer MinGW (such as the one which ships with Qt). The fact that this seems to work is encouraging, but it's still a bit of a difficult process to put people through. I know that Windows developers are in short supply, so I would like to offer what assistance I can in making this happen. There appear to be copies of MinGW stored in the GHC repository at http://git.haskell.org/ghc-tarballs.git/tree . Does the build system use these automatically or are they just there for reference? Thanks, -- Robin KAY