forcing gcc Og optimization via pragma triggers a compiler bug

In my project, I have to set compiler options differently for fmt because just using "g++ -g" triggers a compiler bug:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118315

I have tested for GCC 12.2.0, 13.3.0 and 14.2.

It is related to issue and commit:
https://github.com/fmtlib/fmt/issues/2193

https://github.com/fmtlib/fmt/commit/35c71ff536321475f688fe50424e3eb070868a94
