[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 #10 from Michael Meissner <meissner at gcc dot gnu.org> ---
Created attachment 41642
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41642&action=edit
Patch to add ppc_cpu_supports_hw target support for tests

BTW, the patch attached allows us to check whether __builtin_cpu_supports works
on power7 and newer systems.