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

[Red Hat Bugzilla]

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(a)redhat.com
          Reporter: rc040203(a)freenet.de
        QA Contact: extras-qa(a)fedoraproject.org
                CC: behdad(a)fedoraproject.org,
                    fonts-bugs(a)lists.fedoraproject.org,
                    kevin(a)tigcc.ticalc.org, mkasik(a)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] freetype-2.6.5 and freetype-2.6.3 are ABI incompatible

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1372368

Ralf Corsepius <rc040203(a)freenet.de&gt; changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |1372348




Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1372348
[Bug 1372348] Inventor: FTBFS in rawhide and fc25
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[Bug 1372368] freetype-2.6.5 and freetype-2.6.3 are ABI incompatible

[Red Hat Bugzilla]

https://bugzilla.redhat.com/show_bug.cgi?id=1372368



--- Comment #1 from Marek Kašík <mkasik(a)redhat.com&gt; ---
It was this commit which turned off export of the functions:

http://git.savannah.gnu.org/cgit/freetype/freetype2.git/commit/ChangeLog?...

I've grepped through all the ~800 packages we have in Fedora 25 which depends
on libfreetype.so* and I've found that only the Inventor calls an internal
function of freetype (the FT_Done_GlyphSlot()).

I'm proposing to not bump the SONAME because of this and close this bug as
wontfix, do you agree?

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

https://bugzilla.redhat.com/show_bug.cgi?id=1372368

Marek Kašík <mkasik(a)redhat.com&gt; changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |CLOSED
         Resolution|---                         |WONTFIX
        Last Closed|                            |2017-08-17 05:06:24



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