[\s\\]*\s+ # possible line continuation
([A-Za-z0-9_/.-]+/)? # path to file
[A-Za-z0-9_-]+ # binary name (no dots!)
- (\.so([0-9.])*|\.la)? # library (including version)
+ (\.so[0-9.]*[a-z]?|\.la)? # library (including version)
(\s|\\|\$) # end of file name
}x
or $line =~ /^libtool: link: /