[Gdal-dev] Frightening ancient libpng inside GDAL

[Ben Discoe]

I discovered this evening that GDAL has built into its CVS source tree, the
source to libpng 1.0.6.  This actually gets compiled into the GDAL library,
at least on Windows.  This is a _really_ old libpng, there have been giant
improvements, speedups, bug fixes, security fixes, etc.

The current version is 1.2.6.

Should we update the libpng that's in GDAL, or perhaps remove it instead,
making libpng an external dependency?

Thanks,
Ben