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<H1>[Mageia-dev] executable libraries</H1>
<B>Per Øyvind Karlsen</B>
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TITLE="[Mageia-dev] executable libraries">peroyvind at mandriva.org
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<I>Fri Mar 2 22:01:29 CET 2012</I>
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<PRE>Den 21:51 2. mars 2012 skrev Maarten Vanraes <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">alien at rmail.be</A>> følgende:
><i> Op vrijdag 02 maart 2012 21:29:05 schreef Anssi Hannula:
</I>>><i> 02.03.2012 21:57, Maarten Vanraes kirjoitti:
</I>>><i> > Op vrijdag 02 maart 2012 15:22:23 schreef Anssi Hannula:
</I>>><i> >> 02.03.2012 00:17, Maarten Vanraes kirjoitti:
</I>>><i> >>> Op donderdag 01 maart 2012 23:05:35 schreef Anssi Hannula:
</I>>><i> >>> [...]
</I>>><i> >>>
</I>>><i> >>>>> does this mean debug info fails for these?
</I>>><i> >>>>
</I>>><i> >>>> I'm not immediately sure (I never remember how the debug/stripping
</I>>><i> >>>> stuff works exactly), but I think either a) debug symbols extraction
</I>>><i> >>>> and thus -debug packaging, b) stripping, or c) both will fail with
</I>>><i> >>>> non-executable shared libs.
</I>>><i> >>>
</I>>><i> >>> in that case i guess we would need a policy or bs check to make sure we
</I>>><i> >>> don't fail some libraries debug and strip
</I>>><i> >>
</I>>><i> >> Possibly.
</I>>><i> >>
</I>>><i> >> Interestingly, Debian policy disallows executable permission on shared
</I>>><i> >> libs:
</I>>><i> >> <A HREF="http://www.debian.org/doc/debian-policy/ch-sharedlibs.html#s-sharedlibs-">http://www.debian.org/doc/debian-policy/ch-sharedlibs.html#s-sharedlibs-</A>
</I>>><i> >> ru ntime
</I>>><i> >>
</I>>><i> >> "Shared libraries should not be installed executable, since the dynamic
</I>>><i> >> linker does not require this and trying to execute a shared library
</I>>><i> >> usually results in a core dump."
</I>>><i> >
</I>>><i> > which is sort of strange, since libc is actually executable by design.
</I>>><i> >
</I>>><i> > i see where they are coming from
</I>>><i> >
</I>>><i> > but i guess the first part of this is, why is there a find with
</I>>><i> > executable restrictions for the code relating to stripped binaries and
</I>>><i> > debug?
</I>>><i> >
</I>>><i> > is it because it's also used for real executables?
</I>>><i>
</I>>><i> I guess it is there just to speed up the process, otherwise it would
</I>>><i> have to run 'file' for every file in the package (and many packages have
</I>>><i> lots of files).
</I>><i>
</I>><i> still, it seems kind of weird, there are rpmlint checks for unstripped
</I>><i> libraries, but i do have 34 libraries not marked as executable, while the
</I>><i> stripping+ debug seems to target only executables?
</I>><i>
</I>><i> i wonder if we should make another check library unset as executable or even
</I>><i> check what happened with these libraries not marked as executable?
</I>I posted a link to a rpmlint patch implementing such a check to this thread two
hours ago.. :p
--
Regards,
Per Øyvind
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