Re: PIC is wasteful

[Marc Glisse <marc dot glisse at inria dot fr>]

On Fri, 24 Jun 2011, Agner Fog wrote:

> On 23-06-2011 22:02, Marc Glisse wrote:
> > On Thu, 23 Jun 2011, Ian Lance Taylor wrote:
> >
> > > Agner Fog <agner@agner.org> writes:
> > >
> > > > I wonder why position-independent code (PIC) and global offset tables
> > > > (GOT) are used in shared objects (.so) when these features are wasting
> > > > resources and apparently unnecessary. The wasteful use of PIC and GOT
> > > > in Linux is apparent in the following questions:
> >
> > Do you mean you would like -Bsymbolic to be the default ? (or maybe 
> > Solaris' -Bdirect)
>
> Thanks for the tip about -Bsymbolic, that's what I want, but it doesn't seem 
> to do the job.
> When I compile with -Bsymbolic -fpic I still get a GOT entry in 64 bit mode.

I just tried (linux amd64) on a trivial lib with 2 functions where the 
second calls the first. And -Bsymbolic made the entry for the first 
function disappear from the .rela.plt section. So it makes some difference 
at least.

--
Marc Glisse