https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99703
--- Comment #12 from Sergei Trofimovich <slyfox at gcc dot gnu.org> --- Downstream bug report is https://gcc.gnu.org/PR99703 (has all config.log files and build log files). Caveat: Gentoo's gcc-10.2.0 has a https://gitweb.gentoo.org/proj/gcc-patches.git/tree/10.2.0/gentoo/44_all_cet-i486.patch applied (not yet in gcc master, I might have done it incorrectly). To decrease unknowns, Worx, can you clone gcc's git tree and try to build gcc out of it? On Gentoo system it should be a: $ git clone git://gcc.gnu.org/git/gcc.git $ mkdir gcc-build $ cd gcc-build $ patch -p1 /path/to/44_all_cet-i486.patch $ ../gcc/configure $ make We'll need a build log and all `config.log` files (there will be a bunch in different build dirs, one of them will contain CET mis-detection).