[Bug target/81193] PowerPC GCC __builtin_cpu_is and __builtin_cpu_supports should warn about old libraries

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81193

--- Comment #12 from Michael Meissner <meissner at gcc dot gnu.org> ---
Created attachment 41721
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41721&action=edit
Proposed patch to fix the problem