Merge branch '676-clang-12-compiler-warnings-on-macos' into 'OPAL-2021.1'
Resolve "Clang 12 compiler warnings on macOS"
See merge request !530 (merged)
(cherry picked from commit 9eb107d8)
e924817e Fixes for several Clang warnings 9e9f02a4 Merge branch... fadcf4b0 Merge branch '677-linking-issues-on-macos' into 676-clang-12-compiler-warnings-on-macos 60176049 Improve fixes for Clang warnings