[GHC] #13373: Handle long file paths on Windows
GHC
ghc-devs at haskell.org
Wed Jun 7 15:36:36 UTC 2017
#13373: Handle long file paths on Windows
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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: |
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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>
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