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Re: libgcc_s.so 3.4 vs 3.0 compatibility
On Tue, Apr 19, 2005 at 02:23:26PM +0200, Peter FELECAN wrote:
> > > Currently the libgcc_s.so library has the same version in 3.4 and 4.0,
> > > i.e libgcc_s.so.1 (SONAME = libgcc_s.so.1).
> > >
> > > Is this as expected?
Jakub Jelinek <firstname.lastname@example.org> writes:
> > Yes.
> > > Are the 2 libraries compatible? Interchangeable? Looking in the map
> > > file, I don't think so.
> > There is backwards compatibility. So you want the latest libgcc_s.so.1
> > from the compilers used to build your applications.
> I should understand that, as usual, there is no "backward"
> compatibility. My worry being the case when somebody, having installed
> 3.4 and 4.0, in this order, updates the previous compiler, 3.4, and
> unknowingly replaces the latest library. For this, I think that
> additional instrumentations are required by the corresponding
> packages. Consequently, it is the role of the packager to assure an
> hermetic separation.
No, I think you misunderstood Jakub. If 4.0 is installed second, it will
update the libgcc_s.so.1, and all the apps compiled with either compiler
will continue to work. You want to avoid the reverse situation, where 4.0
is installed first and then 3.4.