[flang-commits] [flang] [flang] Implement IERRNO intrinsic (PR #124281)

[Tom Eccles via flang-commits]

https://github.com/tblah approved this pull request.

LGTM with the nit on the test. Thanks for the patch.

Please wait at least a day before merging so the other reviewers have chance to take a look if they would like to.

https://github.com/llvm/llvm-project/pull/124281