On 08/08/17 18:13, allan gottlieb wrote:
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

That usually works. If you want to be 100% sure, you still need a full @system followed by a @world rebuild. But usually just rebuilding C++-linked packages will give you a stable system.

I still recommend a @system rebuild at least though, since it's fast.

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