https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84148
--- Comment #16 from itsimbal at gcc dot gnu.org --- Author: itsimbal Date: Mon Feb 19 16:25:49 2018 New Revision: 257809 URL: https://gcc.gnu.org/viewcvs?rev=257809&root=gcc&view=rev Log: CET shouldn't be enabled in 32-bit run-time libraries by defualt ENDBR32 and RDSSPD are multi-byte NOPs on x86-64 processors and newer x86 processors, starting Pentium Pro. They are UD on older 32-bit processors. Detect this at configure time and adjust the default value for enable_cet. GCC will enable CET in 32-bit run-time libraries in any case if --enable-cet is used to configure GCC. PR target/84148 * config/cet.m4: Check if target support multi-byte NOPS (SSE). * libatomic/configure: Regenerate. * libbacktrace/configure: Likewise. * libgcc/configure: Likewise. * libgfortran/configure: Likewise. * libgomp/configure: Likewise. * libitm/configure: Likewise. * libmpx/configure: Likewise. * libobjc/configure: Likewise. * libquadmath/configure: Likewise. * libsanitizer/configure: Likewise. * libssp/configure: Likewise. * libstdc++-v3/configure: Likewise. * libvtv/configure: Likewise. Modified: trunk/config/ChangeLog trunk/config/cet.m4 trunk/libatomic/ChangeLog trunk/libatomic/configure trunk/libbacktrace/ChangeLog trunk/libbacktrace/configure trunk/libgcc/ChangeLog trunk/libgcc/configure trunk/libgfortran/ChangeLog trunk/libgfortran/configure trunk/libgomp/ChangeLog trunk/libgomp/configure trunk/libitm/ChangeLog trunk/libitm/configure trunk/libmpx/ChangeLog trunk/libmpx/configure trunk/libobjc/ChangeLog trunk/libobjc/configure trunk/libquadmath/ChangeLog trunk/libquadmath/configure trunk/libsanitizer/ChangeLog trunk/libsanitizer/configure trunk/libssp/ChangeLog trunk/libssp/configure trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/configure trunk/libvtv/ChangeLog trunk/libvtv/configure
