https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61577
--- Comment #87 from The Written Word <bugzilla-gcc at thewrittenword dot com> --- (In reply to EML from comment #80) > During stage0 - MPFR will ICE in GCC4.9.3 due to TLS. You need to go into > the MPFR directory and re-run the same configure line from config.log, but > add --disable-thread-safe. We haven't had any issues with MPFR. We're using 3.1.6 built with the HP C compiler.