Comment # 1 on bug 922419 from Michael Matz

Indeed.  4.7 already had this problem.  This is minor, because the info
program correctly uses gcc-4.8.info.gz when invoked with 'info g++', because
the gcc{-version}.info.gz file mentions it's responsible also for g++, so
the info index (in /usr/share/info/dir) is correct.

The g++ softlink should either not exist at all, or point to
gcc-version.info.gz.