[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 #12 from Tobias Schlüter <tobi at gcc dot gnu.org> 2012-08-17 21:35:50 UTC ---
Well, directories given by -I are searched before system directories, -L adds
directories to the end of the library search list, so their functions are not
equivalent.  Which is the root of my problem, and which will always lead to
conflicts if a library is installed both in a system dir and under some prefix
specified via a --with-lib-prefix= option.  Ugly.