[GHC] #12169: libraries/base/dist-install/build/HSbase-4.9.0.0.o: unknown symbol `stat'

[GHC]

#12169: libraries/base/dist-install/build/HSbase-4.9.0.0.o: unknown symbol `stat'
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        Reporter:  thomie            |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Runtime System    |              Version:  8.0.1
  (Linker)                           |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         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 thomie):

 According to
 https://github.com/snowleopard/hadrian/commit/116e64d5596233dcacff48ce7e5e0531f730e6bd,
 compiling the C files in base with `-O2` (or `-O`?) should fix the
 problem. I don't understand why.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12169#comment:1>
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