[Bug target/81842] -fcf-protection -mcet is incompatible with makecontext family functions

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81842

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 42823
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42823&action=edit
The first patch