[Bug bootstrap/54304] linking stage picks up system mpfr instead of in-tree version

[tobi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54304

--- Comment #14 from Tobias Schlüter <tobi at gcc dot gnu.org> 2012-08-17 
22:25:15 UTC ---
Ah, true, further down in the ld manpage this is stated clearly.  Thanks!