libsupc++.so.1 problem after launching opera

[xripro]

Hi to all,

I am on current r278361 and I have installed www/opera.

When I am launching opera I get this error message:

 

Error locating 'readfile' - Shared object "libsupc++.so.1" not found,
required by "libstdc++.so.6"

 

The browser seems to start up normally but it display some of the web pages
that I am trying to browse.

 

How can I resolve this error?