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Re: [I don't think it's off-topic at all] Linking speed for C++
- To: Joe Buck <jbuck at synopsys dot COM>
- Subject: Re: [I don't think it's off-topic at all] Linking speed for C++
- From: Richard Henderson <rth at redhat dot com>
- Date: Thu, 10 May 2001 10:14:46 -0700
- Cc: Andreas Jaeger <aj at suse dot de>, biswapesh dot chattopadhyay at bt dot com, gcc at gcc dot gnu dot org, bastian at suse dot com
- References: <20010509154946.A26740@redhat.com> <200105100001.RAA29888@toledo.synopsys.com>
On Wed, May 09, 2001 at 05:01:18PM -0700, Joe Buck wrote:
> Or, of course, just break the ability to overload symbols for virtual
> functions. :-) The user waiting for his desktop to start up may not
> care.
Recently some symbol visibility flags were added to ELF. It
would be possible to change the compiler such that
class __attribute__((visibility(protected))) Foo
{
...
};
marked each member symbol of Foo with STV_PROTECTED, which
prevents this symbol from being overridden by another DSO.
Judicious use of this feature might reduce the number of
symbol relocations (vs relative relocations) substantially.
r~