[Bug bootstrap/53798] [4.7] Bootstrap fails on Linux x86_64 with pre-built libmpc/mpfr/gmp due to multilib path problem

[windward at gmx dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53798

--- Comment #2 from Martin <windward at gmx dot com> 2012-07-17 10:10:01 UTC ---
Created attachment 27809
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27809
Diffs of a crude workaround