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

[glisse at gcc dot gnu.org]

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

--- Comment #13 from Marc Glisse <glisse at gcc dot gnu.org> 2012-08-17 
22:06:07 UTC ---
(In reply to comment #12)
> Well, directories given by -I are searched before system directories,

Yes (system directories are those given by -isystem or hardcoded in the
compiler).

> -L adds directories to the end of the library search list,

No, there are also system directories afterwards.

Not that system directories are relevant here...