Backport of "macos/ios: expose objc++ compilers in env variables" into 1.16
Backport of !324 (merged) "macos/ios: expose objc++ compilers in env variables".
Needs manual intervention, cherry-picking failed!
Commits:
- c958da72 macos/ios: expose objc++ compilers in env variables
Edited by Tim-Philipp Müller