Re: ld.so and bad symlinks from other libs
On Feb 20, Karl M. Hegbloom wrote
> I just upgraded to ld.so.1.8.10, and when the postinst ran
> 'ldconfig', there where the following messages:
>
> 8<----------------------------------------------------------------->8
> ldconfig: warning: can't open /usr/lib/libslang.so.0 (No such file or directory), skipping
> ldconfig: warning: can't open /usr/lib/libreadline.so (No such file or directory), skipping
> ldconfig: warning: can't open /usr/lib/libhistory.so (No such file or directory), skipping
> ldconfig: warning: can't open /usr/lib/libpthreads.so.1 (No such file or directory), skipping
> 8<----------------------------------------------------------------->8
>
> ... these were easy to fix; they are symlinks to files that are not
> there anymore. I'm not sure, but I think that the libraries'
> maintainers may need to adjust their postinst scripts??? Well, mine's
> fixed.
These are probably leftovers from removed packages that weren't built
correctly or from installing mismatched versions of run-time and
development packages.
> I am wondering about something now though. Tell me if I'm wrong.
> There should be three directory entries for each shared library.
> eg:
> libreadline.so.2.1
> libreadline.so.2 -> libreadline.so.2.1
> libreadline.so -> libreadline.so.2.1 (or should this point to so.2 ?)
>
> What is the correct configuration?
Pointing to so.2.1 is correct. A lot of people think pointing to so.2
is better because it is "automatically" updated when a new library is
installed, but that can lead to problems when the ELF symbol
versioning that is currently in pre-alpha testing starts getting used.
David
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David Engel ODS Networks
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