[gentoo-user] upgrading to gcc-5 (on x86_64-pc-linux-gnu)

[allan gottlieb]

gcc-config -l reports
 [1] x86_64-pc-linux-gnu-4.9.3
 [2] x86_64-pc-linux-gnu-4.9.4 *
 [3] x86_64-pc-linux-gnu-5.4.0

The news item from 2015-10-22 suggests (I have gentoolkit-0.3.3)
  # revdep-rebuild --library 'libstdc++.so.6' -- --exclude gcc

Is that the entire procedure needed?  In particular, ignoring
performance, can I avoid emerge --emptytree and just execute?

  # gcc-config x86_64-pc-linux-gnu-5.4.0
  # revdep-rebuild --library 'libstdc++.so.6' -- --exclude gcc

thanks,
allan