https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81842
--- Comment #13 from H.J. Lu <hjl.tools at gmail dot com> --- Created attachment 42895 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42895&action=edit A patch to add -mcheck-shstk-compat -mcheck-shstk-compat is on by default. We can add #if defined __SHSTK__ && defined __CHECK_SHSTK_COMPAT__ # error This source is incompatible with -mshstk #endif to <ucontext.h>.
