Re: [GHC] #5709: ghc-7.2 cannot find libraries in non-standard locations

[GHC]

#5709: ghc-7.2 cannot find libraries in non-standard locations
---+
  Reporter:  kosmikus  |  Owner:  
  Type:  bug   | Status:  closed  
  Priority:  normal|  Milestone:  7.4.1   
 Component:  Package system|Version:  7.2.1   
Resolution:  fixed |   Keywords:  
Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
   Failure:  Other | Difficulty:  Unknown 
  Testcase:|  Blockedby:  
  Blocking:|Related:  
---+
Changes (by simonmar):

  * status:  new => closed
  * difficulty:  => Unknown
  * resolution:  => fixed
  * milestone:  => 7.4.1


Comment:

 I'm not quite sure how this broke in 7.2, but it is fixed in 7.4 and we
 have a test for it (`ghcilink005`).

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[GHC] #5709: ghc-7.2 cannot find libraries in non-standard locations

[GHC]

#5709: ghc-7.2 cannot find libraries in non-standard locations
--+-
 Reporter:  kosmikus  |  Owner:  
 Type:  bug   | Status:  new 
 Priority:  normal|  Component:  Package system  
  Version:  7.2.1 |   Keywords:  
   Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
  Failure:  Other |   Testcase:  
Blockedby:|   Blocking:  
  Related:|  
--+-
 The following is what I perceive to be a regression from ghc-7.0.4 to
 ghc-7.2.1 and ghc-7.2.2.

 On NixOS, all packages are installed into separate directories in the Nix
 store. With ghc-7.0.4, the following works:
 {{{
 $ ghc -package zlib -e "print ()"
 ()
 $ ghc-pkg describe zlib | grep library-dirs -A 1
 library-dirs: /nix/store/vnflri0w0fadiqwv1j6w6gxw00paav6a-haskell-zlib-
 ghc7.0.4-0.5.3.1-profiling/lib/zlib-0.5.3.1/ghc-7.0.4
   /nix/store/0jmzlnayh2p06vlgmiiyaj3xppc6l9lr-zlib-1.2.5/lib
 $ strace ghc -package zlib -e "print ()" 2>&1 | grep libz.so
 stat64("/nix/store/vnflri0w0fadiqwv1j6w6gxw00paav6a-haskell-zlib-
 ghc7.0.4-0.5.3.1-profiling/lib/zlib-0.5.3.1/ghc-7.0.4/libz.so",
 0xb5e94490) = -1 ENOENT (No such file or directory)
 stat64("/nix/store/0jmzlnayh2p06vlgmiiyaj3xppc6l9lr-
 zlib-1.2.5/lib/libz.so", {st_mode=S_IFREG|0555, st_size=91092, ...}) = 0
 open("/nix/store/0jmzlnayh2p06vlgmiiyaj3xppc6l9lr-zlib-1.2.5/lib/libz.so",
 O_RDONLY) = 7
 }}}

 However, if I try exactly the same with ghc-7.2.1, I get:
 {{{
 $ ghc -package zlib -e "print ()"
 : can't load .so/.DLL for: libz.so (libz.so: cannot open
 shared object file: No such file or directory)
 $ ghc-pkg describe zlib | grep library-dirs -A 1
 library-dirs: /nix/store/6zjd86g35dpxl5r6zrr67nnmf00qalkr-haskell-zlib-
 ghc7.2.1-0.5.3.1-profiling/lib/zlib-0.5.3.1/ghc-7.2.1
   /nix/store/0jmzlnayh2p06vlgmiiyaj3xppc6l9lr-zlib-1.2.5/lib
 $ strace ghc -package zlib -e "print ()" 2>&1 | grep libz.so
 open("/nix/store/ri2nlzb1lsi0d1y7nb8dkhzhsnyd08k4-gmp-4.3.2/lib/libz.so",
 O_RDONLY) = -1 ENOENT (No such file or directory)
 open("/nix/store/nmliqd429c0s4sdlbk0394zdfx86gvf9-ncurses-5.7/lib/libz.so",
 O_RDONLY) = -1 ENOENT (No such file or directory)
 open("/nix/store/m9p1r0p6qlaw5wy5hnwpii323la3s8j3-glibc-2.12.2/lib/libz.so",
 O_RDONLY) = -1 ENOENT (No such file or directory)
 open("/nix/store/m9p1r0p6qlaw5wy5hnwpii323la3s8j3-glibc-2.12.2/lib/libz.so",
 O_RDONLY) = -1 ENOENT (No such file or directory)
 }}}
 The directories listed by strace seem to be the ones used for building GHC
 itself. The directories in the package configuration file seem to be
 ignored.

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