[Bug lto/104868] powerpc: Compiling libgfortran with -flto failing with GCC 12

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104868

--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Created attachment 52601
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52601&action=edit
proposed patch

Try the attached, instead?