https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113205
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> --- -fno-tree-slp-vectorize, either on the command line for the affected compilation unit or __attribute__((optimize ("no-tree-slp-vectorize"))) on the problematic routine. --- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Sérgio Basto from comment #6) > and any workaround to build mlt on x86_64 ,exist ? > > I tried disable lto, hardening and also disable strict symbols (-Wl,-z,defs > ) and still not build neither in koji nor in my machine `-fno-tree-slp-vectorize` should work around it ... but that only works around the issue on the trunk which will be fixed by the time release happens.