[GHC] #10131: improve error message for build on noexec-mounted device

[GHC]

#10131: improve error message for build on noexec-mounted device
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              Reporter:  lspitzner   |             Owner:
                  Type:  feature     |            Status:  new
  request                            |         Milestone:
              Priority:  normal      |           Version:  7.8.4
             Component:  Compiler    |  Operating System:  Unknown/Multiple
              Keywords:              |   Type of failure:  Other
          Architecture:              |        Blocked By:
  Unknown/Multiple                   |   Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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 i was building (in a sandbox) on a ramdisk that was accidentally mounted
 with the noexec flag. for example during the install of `vector`, you get
 an error like

     Loading package primitive-0.5.4.0 ... <command line>: can't load
 .so/.DLL for: somepath/.cabal-sandbox/lib/x86_64-linux-
 ghc-7.8.4/primitive-0.5.4.0/libHSprimitive-0.5.4.0-ghc7.8.4.so (somepath
 /.cabal-sandbox/lib/x86_64-linux-
 ghc-7.8.4/primitive-0.5.4.0/libHSprimitive-0.5.4.0-ghc7.8.4.so: failed to
 map segment from shared object)

 relevant output of `mount`:
     none on somepath type tmpfs
 (rw,nosuid,nodev,noexec,relatime,gid=103,user=lspitzner)

 this is by far no minimal test-case, but i hope my description of the
 problem is sufficient. if not, i can provide verbose output for my or
 other test-cases.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10131>
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