[llvm] [openmp] Fix GCC 15.1 Fortran Runtime libstdc++ Undefined Symbols (PR #157385)

[Patrick Simmons via llvm-commits]

linuxrocks123 wrote:

@Meinersbur if it's only GCC 15.1 we might be able to get away with not fixing this, because I don't think any big distro has done a release with GCC 15.1 as the compiler.  If it's GCC 14.2 then Debian Trixie released with 14.2, so we can't ignore it.

And if it's GCC 15.2 for me but not for you then we have to figure out why it doesn't reproduce for you.

https://github.com/llvm/llvm-project/pull/157385