http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59723
--- Comment #7 from Dominique d'Humieres <dominiq at lps dot ens.fr> --- > ... which implies that the GCC testsuite needs to be improved with regards > to LTO testing as there was no new failure with the patch. Not GCC, but gfortran. I stumbled on this pr with make -k check-gfortran RUNTESTFLAGS="--target_board=unix'{-m32/-flto,-m64/-flto}'" One may consider to add something '-Ofast -flto' to the set of options in gfortran.dg.