inflate_fast compress compress2 compressBound adler32_combine adler32 zcalloc zcfree zError zlibCompileFlags zlibVersion .... png_write_data png_default_write_data png_default_flush png_set_write_fn png_flush .... libpng/ directory inside the sources.
@Diego, do you know which versions of libpng and zlib are bundled?
zlib 1.2.3 and libpng 1.2.22 is what the headers report.
Both versions seems safe from looking at old GLSAs.
Cartman from Pardus helps again :) http://svn.pardus.org.tr/pardus/devel/programming/tools/doxygen/files/system-libpng.patch
Updated, back-ported, and in portage. I'll let Diego close this one...
Checked and all fine now, external libpng is used and no more internal copies of either that or zlib can be found, thanks Steve :)