New subject: [Bug 1372368] freetype-2.6.5 and freetype-2.6.3 are ABI incompatible

1 Sep 2016


      https://bugzilla.redhat.com/show_bug.cgi?id=1372368
Bug ID: 1372368
           Summary: freetype-2.6.5 and freetype-2.6.3 are ABI incompatible
           Product: Fedora
           Version: 25
         Component: freetype
          Assignee: mkasik@redhat.com
          Reporter: rc040203@freenet.de
        QA Contact: extras-qa@fedoraproject.org
                CC: behdad@fedoraproject.org,
                    fonts-bugs@lists.fedoraproject.org,
                    kevin@tigcc.ticalc.org, mkasik@redhat.com
Description of problem:
With freetype-2.6.5, some freetype-internal functions, which were publicly
accessible before were made inaccessible,
e.g. FT_New_GlyphSlot, FT_Done_GlyphSlot
Due to the fact the SONAME was not changed and no mass-rebuild performed for
fc25, this change at least broke Inventor (Inventor uses FT_Done_GlyphSlot).
I haven't tried to check and therefore don't know if this affects more
packages.
fc25 ships an fc24-built Inventor which now contains a reference to an
unresolvable symbol which used to be provided by freetype.
Version-Release number of selected component (if applicable):
freetype-2.6.5
Additional info:
- Inventor clearly is at fault to use private functions from freetype, but it
had been this way for more than ca. 15 years.
- IMHO, it's arguable whether freetype's SONAME should have been changed.
libfreetype.so.6.12.3 and libfreetype.so.6.12.5 definitely are ABI
incompatible.
- It's not clear to me, why freetype made FT_Done_GlyphSlot inaccessible, but
left other similar functions public.
- ATM, I do not see an alternative but to "steal" FT_Done_GlyphSlot code from
freetype and to incorporate it into Inventor, to work-around Inventor's problem
on fedora >= 25.
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[Bug 1372368] New: freetype-2.6.5 and freetype-2.6.3 are ABI incompatible