#12171: cygwin - option to accept ISO C99... unsupported -------------------------------------+------------------------------------- Reporter: wozgonon | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Build System | Version: 8.0.1 Keywords: | Operating System: Windows Architecture: x86 | Type of failure: Building GHC | failed Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- Tried to build Haskell under cygwin under Windows 10 (x86_64) but /configure failed. I had a look on google and through the bug tracker but could not find anything helpful. Note that in the output from ./configure check two versions of gcc.exe 1) ... /ghc/inplace/mingw/bin/gcc.exe 2) C:/Program Files/Haskell Platform/8.0.1/lib/../mingw/bin/gcc.exe The check for the first succeeds but that for the second fails yet they both seem to be the same version of gcc.exe: (realgcc.exe (Rev3, Built by MSYS2 project) 5.2.0) {{{ checking for C:/unix/cygwin64/home/jb/haskell/ghc/inplace/mingw/bin/gcc.exe option to accept ISO C99... none needed checking for C:/Program Files/Haskell Platform/8.0.1/lib/../mingw/bin/gcc.exe option to accept ISO C99... unsupported }}} {{{ $ C:/unix/cygwin64/home/jb/haskell/ghc/inplace/mingw/bin/gcc.exe --version realgcc.exe (Rev3, Built by MSYS2 project) 5.2.0 Copyright (C) 2015 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. jb@fabulord ~/haskell/ghc $ "C:/Program Files/Haskell Platform/8.0.1/lib/../mingw/bin/gcc.exe" --version realgcc.exe (Rev3, Built by MSYS2 project) 5.2.0 Copyright (C) 2015 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12171 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler