René Bertin authored Apr 24, 2024 and Brad King committed Apr 24, 2024

Fat LTO objects contain both traditional object code and the LTO bitcode
IR, but the GNU compiler does not support them on Apple platforms.
A compile error is raised when `-f[no-]fat-lto-objects` flags are used,
so avoid them.

This also implies that static Fortran libraries cannot be built with IPO.

Fixes: #25931