commit 660bc13d97e2929e16e40ac2975841185130e594
author Daniel Sanders <daniel_l_sanders@apple.com> Tue Feb 19 19:45:03 2019 +0000
committer Daniel Sanders <daniel_l_sanders@apple.com> Tue Feb 19 19:45:03 2019 +0000
tree 5d98ab819f6b3f109d77d666438be73c53b2dbe4
parent 20cf903d60d99af9751139c33d88547928180e4c

Fix builds for older macOS deployment targets after r354365

Surprisingly, check_symbol_exists is not sufficient. The macOS linker checks the
called functions against a compatibility list for the given deployment target
and check_symbol_exists doesn't trigger this check as it never calls the
function.

This fixes the GreenDragon bots where the deployment target is 10.9


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354374 91177308-0d34-0410-b5e6-96231b3b80d8