#13373: Handle long file paths on Windows -------------------------------------+------------------------------------- Reporter: ezyang | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: Component: libraries/base | Version: 8.1 Resolution: | Keywords: Operating System: Windows | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by joeyhess): Due to https://ghc.haskell.org/trac/ghc/ticket/13796 it's hard to make ghc embed a custom manifest file to enable long filename support. However, use -fno-embed-manifest and when running foo.exe, windows will read a side-by- side foo.exe.manifest file. I tested this with a foo.hs containing main = writeFile (take 300 (cycle "a")) "hello" Despite the manifest enabling long file support, on Windows 10 that fails with "openFile: does not exist". Seems that long file support includes CreateFileW, but ghc's openFile uses _wsopen, which is not included in the long file support. This makes the manifest approach only useful for some subset of programs. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13373#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler