http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48378
--- Comment #14 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-04-02 23:39:58 UTC --- what my makefile does is put the gmp sources in the gcc tree as gcc-4.6.0/gmp (not as gcc-4.6.0/gmp-5.0.1 as you seem to have it) and similarly for mpfr and mpc. Then just configure gcc, it will detect and build the prerequisite libs, and link to them statically. You seem to have put the source under the gcc tree, then built them there yourself? I don't think that will work.
