Re: [GHC] #16063: ghc-8.6.3 + Mac OSX + FFI dependency causes 'impossible happened' compiler failure

#16063: ghc-8.6.3 + Mac OSX + FFI dependency causes 'impossible happened' compiler failure -------------------------------------+------------------------------------- Reporter: benselfridge | Owner: (none) Type: bug | Status: patch Priority: normal | Milestone: Component: Compiler | Version: 8.6.3 Resolution: | Keywords: Operating System: MacOS X | Architecture: x86_64 Type of failure: Compile-time | (amd64) crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D5462 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Alec Theriault ): In [changeset:"6b5ec08a4a64525bae87a8c2202688ffc6f86aa8/ghc" 6b5ec08a/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="6b5ec08a4a64525bae87a8c2202688ffc6f86aa8" Check that libs found by GCC aren't folders Summary: We use 'gcc -B<base-location> --print-file-name mylib.a' as a way of checking if 'gcc' can discover 'mylib.a' at the given location. However, this can break down if there is a folder caller 'mylib.a' that 'gcc' can discover. We can guard against this by explicitly checking that the path returned by 'gcc' is a file. This may seem like a far-fetched scenario, but since 3d17f1f10fc00540ac052f2fd03182906aa47e35, we look for libraries without any prefix or suffix (ie. 'extra-libraries: softfloat', we look for just 'softfloat' as well as 'softloat.a', 'softfloat.dll.a', etc.) which means that there might actusally be a folder of that name in one of the base locations. Reviewers: Phyx, bgamari, hvr, angerman Reviewed By: Phyx, angerman Subscribers: angerman, rwbarton, carter GHC Trac Issues: #16063 Differential Revision: https://phabricator.haskell.org/D5462 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16063#comment:8 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler