#13166: Warning: Can't find file "C:\...\lib/include\ghcversion.h" in directories -------------------------------------+------------------------------------- Reporter: domenkozar | Owner: Type: bug | Status: upstream Priority: normal | Milestone: Component: Compiler | Version: 8.0.2 Resolution: | Keywords: Operating System: Windows | Architecture: Type of failure: Incorrect | Unknown/Multiple error/warning at compile-time | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by Phyx-): The path isn't incorrect, It's a perfectly valid Windows path. DOS path separator character `\` isn't required by the API at all. The behavior you're alluding to is that of DOS or command.com, not NT. The page I pointed you to explicitly says: {{{ Note File I/O functions in the Windows API convert "/" to "\" as part of converting the name to an NT-style name, except when using the "\\?\" prefix as detailed in the following sections. }}} You can see an overview here https://en.wikipedia.org/wiki/Path_%28computing%29 or you can just experiment yourself: {{{ C:\Users\tamar\Desktop>mkdir foo C:\Users\tamar\Desktop>echo "hello world" > foo/test.txt C:\Users\tamar\Desktop>dir foo Volume in drive C is Windows Volume Serial Number is ... Directory of C:\Users\tamar\Desktop\foo 01/02/2017 10:17 <DIR> . 01/02/2017 10:17 <DIR> .. 01/02/2017 10:17 16 test.txt 1 File(s) 16 bytes 2 Dir(s) 45,293,834,240 bytes free }}} The error is being generated by `cpphs` and we've given it a valid path. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13166#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler