[flang-commits] [flang] [flang][runtime] Make sure to link libexecinfo if it exists (PR #125344)

[Michael Kruse via flang-commits]

Meinersbur wrote:

> If CMake knows to link to `libexecinfo`, doesn't mean that the flang driver does. This will influence how unittests are linked, but what ensures that an executable created by flang is linked correctly?

#125998 does

https://github.com/llvm/llvm-project/pull/125344