[Bug other/89999] build failed with libmpfr.so.1: open failed: No such file or directory

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89999

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Please read https://gcc.gnu.org/wiki/InstallingGCC