Federico Ferri wrote:
> Hello,
> today I hit this annoyance, because my laptop hung in the middle of an
> 'emerge -e @world' (checking that my world set compiles with
> gcc-4.3... stopped at ~ 300 of 700  :S )
> 

Consider using emerge --keep-going next time.

> I was looking for an entry in /var/db/pkg/<cat/pkg>/ that could have
> told me the compiler used to build the package, but couldn't find any.
> indeed it would be a fairly useful feature to have, both for testing
> purposes, and for user's everyday maintenance.
> 

But the idea isn't that bad imfo. Maybe save the output of emerge --info
in general and it could be easily made available for bug filing. If it
was a while since you emerged the package your emerge --info could now
be different from the merge time and now for example reflect your use flags.

Regards,
Petteri