Only interpolate constant regexps once
Add some comments to the cc wrapper
ola: add Python support and change homepage.

Closes #27977.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
Fix typo
Use File::PATH_SEPARATOR since we use it everywhere else
Print the attempted command when xcrun wrapper fails
jenkins 1.560
jenkins: add 1.560 bottle.