You need to make one string of this:

'^(?:(?:(?:(?:\w+|\*) )+\*?)?((?:svn|apr)_[a-z_0-9]+)\s*\(|'
'extern\s+(?:(?:(?:\w+ |\* ?))+\*?)?((?:svn|apr)_[a-z_0-9]+)\s*;)'