gmp 5.1.1 tests failures on 64 bin windows with AMD processors

[Torbjorn Granlund]

Darin Ohashi <dohashi at maplesoft.com> writes:

  >   Building gmp 5.1.1 using
  >   
  >   ./configure --host=x86_64-w64-mingw32
  >   
  > That's a quite bogus configuration, basically disabling CPU
  > optimisation.  This sent me chasing the bug in the wrong direction,
  > since I assumed you where using a bulldozer config here.
  
  Is there a better way to tell configure to look for the
  x86_64-w64-mingw32 tools?

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Torbjörn