I noticed this and while I hoped to find time to include a patch I haven't yet and so I decided to report without.
It appears that "g++" or maybe subdirectories confuse the ports-readmes-dancer at openports.pl. For example, clicking either of the g++-11.2.0p0 or g++-8.4.0p9 links from https://openports.pl/cat/lang 404: https://openports.pl/path/lang/gcc/11,-c++ https://openports.pl/path/lang/gcc/8,-c++ I tried escaping the ++ with %2b%2b but it doesn't seem as simple as those getting interpreted as spaces. I haven't looked past that.
