[GHC] #9906: Warning generated by hscpp code have unhelpful file names
#9906: Warning generated by hscpp code have unhelpful file names -------------------------------------+------------------------------------- Reporter: tibbe | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Driver | Version: 7.8.3 Keywords: | Operating System: Architecture: Unknown/Multiple | Unknown/Multiple Difficulty: Unknown | Type of failure: Blocked By: | None/Unknown Related Tickets: | Test Case: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- I've started seeing this when compiling cabal with 7.8.3: {{{ [64 of 80] Compiling Distribution.Simple.GHC ( Distribution/Simple/GHC.hs, dist/build/Distribution/Simple/GHC.o ) /var/folders/00/0__yr000h01000cxqpysvccm0019bv/T/ghc43003_0/ghc43003_30.hscpp:270:1: Warning: The import of ‘LibraryName’ from module ‘Distribution.Simple.LocalBuildInfo’ is redundant /var/folders/00/0__yr000h01000cxqpysvccm0019bv/T/ghc43003_0/ghc43003_30.hscpp:308:1: Warning: The import of ‘Language’ from module ‘Language.Haskell.Extension’ is redundant /var/folders/00/0__yr000h01000cxqpysvccm0019bv/T/ghc43003_0/ghc43003_30.hscpp:318:1: Warning: The import of ‘getTemporaryDirectory, getDirectoryContents’ from module ‘System.Directory’ is redundant /var/folders/00/0__yr000h01000cxqpysvccm0019bv/T/ghc43003_0/ghc43003_30.hscpp:325:1: Warning: The import of ‘System.IO’ is redundant except perhaps to import instances from ‘System.IO’ To import instances alone, use: import System.IO() /var/folders/00/0__yr000h01000cxqpysvccm0019bv/T/ghc43003_0/ghc43003_30.hscpp:1092:5: Warning: Pattern match(es) are non-exhaustive In an equation for ‘supportRPaths’: Patterns not matched: Ghcjs [65 of 80] Compiling Distribution.Simple.GHCJS ( Distribution/Simple/GHCJS.hs, dist/build/Distribution/Simple/GHCJS.o ) }}} The `/var/folders/00/0__yr000h01000cxqpysvccm0019bv/T/ghc43003_0/ghc43003_30.hscpp` file name isn't really helpful. I haven't seen this before so I'm guessing this is a regression. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9906 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#9906: Warning generated by hscpp code have unhelpful file names -------------------------------------+------------------------------------- Reporter: tibbe | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Driver | Version: 7.8.3 Resolution: | Keywords: Operating System: | Architecture: Unknown/Multiple Unknown/Multiple | Difficulty: Unknown Type of failure: | Blocked By: None/Unknown | Related Tickets: Test Case: | Blocking: | Differential Revisions: | -------------------------------------+------------------------------------- Comment (by rwbarton): Can you put this in a file `A.hs`: {{{ {-# LANGUAGE CPP #-} module A where #define MESSAGE "Hello, world" f :: Bool -> String f False = MESSAGE main = print (f False) }}} and run `ghc A -Wall -keep-tmp-files`? - Do you get a warning about `A.hs` or some temporary `ghcXXXX_YY.hscpp` file? (On Linux using gcc's C preprocessor, the warning is correctly about `A.hs`.) - In the latter case, could you attach that temporary file here? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9906#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#9906: Warning generated by hscpp code have unhelpful file names -------------------------------------+------------------------------------- Reporter: tibbe | Owner: Type: bug | Status: infoneeded Priority: normal | Milestone: Component: Driver | Version: 7.8.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: None/Unknown | Unknown/Multiple Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by thomie): * status: new => infoneeded -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9906#comment:2 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
#9906: Warning generated by hscpp code have unhelpful file names -------------------------------------+------------------------------------- Reporter: tibbe | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Driver | Version: 7.8.3 Resolution: worksforme | Keywords: Operating System: MacOS X | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Changes (by thomie): * status: infoneeded => closed * resolution: => worksforme * os: Unknown/Multiple => MacOS X Comment: Searching for "/var/folders" on https://github.com/haskell/cabal only shows issues dealing with ghc-7.8. I'm assuming this is fixed, whatever it was. Please reopen if this is still a problem. See also comment:1. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9906#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler
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