[Slackbuilds-users] several builds crashing looking for old libwebp

[Matteo Bernardini]

Il giorno mar 2 ott 2018 alle ore 11:19 David Melik
<dchmelik at gmail.com> ha scritto:
>
> NotepadQQ and KVIRC (though newly compiled) both immediately crash for
> not finding libwebp.so.6.  Well, that file is now at libwebp.so.7.0.2.
> King Beowulf told me (when I finally had to upgrade libwebp for BOINC
> instead of keeping an old one) this behaviour means libwebp is a runtime
> dependency (the SlackBuild maintainers must become aware of) and to link
> libwebp.so.6 to libwebp (which of course itself is a link to the
> 7.0.2.)  I did that, then both worked.  Previously the NotepadQQ
> maintainer said recompile/upgrade libwebp, then NotepadQQ... same thing
> happened. Well, the problem appears to be poor source code in both
> NotepadQQ and KVIRC (most likely) and/or SlackBuilds done wrong... or
> maybe the libwebp maintainer should become aware that some programs try
> to use a specific old version for some reason, and make a link in the
> SlackBuild.

if you upgrade a library to a newer major release with a shared
library version bump, like in your case, you should also rebuild
whatever links against it: I suspect the error you got is because you
have to rebuild qt5 and qt5-webkit (that you built against the old
libwebp in the first place).