https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92757
--- Comment #14 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-9 branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:337111a23499e597707f220662b2567e3f3bd6ea commit r9-8402-g337111a23499e597707f220662b2567e3f3bd6ea Author: Jonathan Wakely <jwak...@redhat.com> Date: Thu Mar 19 15:33:02 2020 +0000 doc: Note that some warnings depend on optimizations (PR 92757) Backport from mainline 2020-01-13 Jonathan Wakely <jwak...@redhat.com> PR driver/92757 * doc/invoke.texi (Warning Options): Add caveat about some warnings depending on optimization settings.