[GHC] #5043: Compiling bytestring-mmap with -fvia-C yields broken .s file, two .size directives

[GHC]

#5043: Compiling bytestring-mmap with -fvia-C yields broken .s file, two .size
directives
-------------------------------+--------------------------------------------
    Reporter:  jeffwheeler     |       Owner:                    
        Type:  bug             |      Status:  new               
    Priority:  normal          |   Component:  Compiler          
     Version:  7.0.2           |    Keywords:                    
    Testcase:                  |   Blockedby:                    
          Os:  Linux           |    Blocking:                    
Architecture:  x86_64 (amd64)  |     Failure:  Compile-time crash
-------------------------------+--------------------------------------------

Comment(by josh):

 Downgrading to binutils 2.20 works around this issue.  binutils 2.21 added
 checking for .size directives.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5043#comment:2>
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