The prerequisites page https://gcc.gnu.org/install/prerequisites.html lists (for MPC):
It can be downloaded from http://www.multiprecision.org/mpc/. The website actually supports https now: https://www.multiprecision.org/mpc/ -- Jonathan Leffler <jonathan.leff...@gmail.com> #include <disclaimer.h> Guardian of DBD::Informix - v2018.1031 - http://dbi.perl.org "Blessed are we who can laugh at ourselves, for we shall never cease to be amused."
