[Bug 194333] New: mod_perl, GD, libpng combination core dumps when doing $img->png

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194333

            Bug ID: 194333
           Summary: mod_perl, GD, libpng combination core dumps when doing
                    $img->png
           Product: Ports Tree
           Version: Latest
          Hardware: Any
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: freebsd-ports-bugs at FreeBSD.org
          Reporter: papowell at astart.com
                CC: dinoex at FreeBSD.org
                CC: dinoex at FreeBSD.org

Created attachment 148258
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=148258&action=edit
SHAR of graphics/png16, graphics/png16,  mods to graphics/gd/Makefile

Using: apache24, libpng (libpng15), gd, p5-GD from repository, also when
compiled from ports.

When generating graphics using a Perl script from apache, apache core dumps
when the perl CGI script runs $img->png,  but only for a small set of graphics.
Similar problem reported in 2004 for various Linux distributions. The problem
appears to be in the libpng $img->png support.  Note: this only occurs when
using mod_perl,  same scripts run stand alone do not core dump.

Solution:  installed libpng16, compiled gd using libpng16,  p5-GD using gd with
libpng16.  This passed my admittedly feeble regression tests.

In doing this,  I generated a modified version of graphics/png which installs
libpng16.  However, graphics/png also installs files with the same names in the
same locations, i.e. /usr/local/include and /usr/local/lib.  The graphics/png
script currently creates version specific directories, /usr/local/lib/libpng15
and installs the libpng15 libraries in this location as well.

I have modified the graphics/png and created two new ports - graphics/png15 and
graphics/png16.  These have a 'configure' option - COMPAT that when selected
will not install files in conflicting locations.  By default, the
graphics/png15 has COMPAT disabled and installs the files while graphics/png16
has the COMPAT enabled and will not install the files in conflicating
locations.

The graphics/gd port Makefile has been modified and a LIBPNG16 configuration
option added.  When this is selected then the libpng16 version of the libraries
installed by graphics/libpng16 are forced to be used, otherwise the default
libraries installed by graphics/png or graphics/png15 can be used.

Attached is a SHAR file that has the graphics/png15 and graphics/png16 ports. 
These can be added to the ports without causing any conflicts with graphics/png
until they are used,  and only if you disable the COMPAT option.

Also, there is a patch for graphics/gd which will select the libpng16 libraries
if the LIBPNG16 configuration option is used.

Is it possible to add these changes to the ports distribution?

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