Mailinglist Archive: opensuse-packaging (192 mails)

[Cristian Morales Vega <cmorve69@xxxxxxxx>]

2011/4/30 Cristian Rodríguez <crrodriguez@xxxxxxxxxxxx>:
> El 29/04/11 19:51, Cristian Morales Vega escribió:
>
> > OK I'm sleepy, but I also were when I wrote the other message :-p
> > I'm wrong or --[no-]copy-dt-needed-entries has no effect at all when
> > creating shared libraries?
>
> "This option also has an effect on the resolution of symbols in dynamic
> libraries. With the default setting dynamic libraries mentioned on the
> command line will be recursively searched, following their DT_NEEDED
> tags to other libraries, in order to resolve symbols required by the
> output binary. With --no-copy-dt-needed-entries specified however the
> searching of dynamic libraries that follow it will stop with the dynamic
> library itself. No DT_NEEDED links will be traversed to resolve symbols."

When it says "This option also has an effect on the resolution of
symbols in dynamic libraries" I understand it means in the "-lxxx"
entries when creating a binary. And the symbol resolution it talks
about would be at link time, not load time. So would have no effect on
the creation of shared libraries.

> If so, I would be against it. What are we
> > going to win?
>
> Less magic behaviour.
>
> Binary compatibility with fedora,debian and ubuntu,removing or adding
> NEEDED entries count as a ABI change to me at least =)

But when are NEEDED entries going to be removed/added? Without
--no-copy-dt-needed-entries binaries will have all the needed entries,
with --no-copy-dt-needed-entries binaries will fail to build... until
you fix them, and when fixed the NEEDED entries will be the same than
before using --no-copy-dt-needed-entries.
And shared libraries will always have only the NEEDED entries
explicitly added, no more no less.

> From the examples given in my previous email: foo1 always will have
NEEDED for foo2.so and foo3.so, and foo1.so always will have the
NEEDED for foo2.so but will miss the one for foo3.so.
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