Re: [BC] Link libs with -Bsymbolic

[Andrew Haley <aph at redhat dot com>]

Bryce McKinlay writes:
 > Andrew Haley wrote:
 > 
 > > > I've been assuming that for 4.0 we would stick pretty closely to
 > > > what we've done all along and not make changes to how our shared
 > > > libraries are built or linked (or split into pieces).  (In other
 > > > words, not merge the library splitting patch from the GUI branch.)
 > > > It is pretty late to consider big changes here, and the indirect
 > > > dispatch code is new enough that I'd rather not enable it for the
 > > > core.
 > >
 > >If indirect dispatch is to work, all libraries except perhaps libgcj
 > >itself muct be compiled with -Bsymbolic.
 > 
 > If libgcj isn't compiled with -Bsymbolic, won't it still be possible for 
 > a libgcj symbol to resolve to another shared object, if the other shared 
 > object contains symbols that conflict?

You're right.  This is a serious problem.

If we're sure it will work, we should use -Bsymbolic with libgcj
itself.

 > My understanding of -Bsymbolic is that it will resolve symbols
 > internally where possible, but they will still be exported and thus
 > valid link targets from other .so's.

Exactly.

Andrew.