12-17-2020, 01:08 AM
Hi,
Those errors are from libpng complaining about not finding zlib implementation. Putting zlib headers is one part of the solution, but there must be the actual library with zlib.lib or similar name. Sometimes libpng includes zlib bundled inside, others it doesn't, that depens on who is packaging libpng. In your case, seems that libpng you downloaded doesn't include it, so you must provide it externally.
Those errors are from libpng complaining about not finding zlib implementation. Putting zlib headers is one part of the solution, but there must be the actual library with zlib.lib or similar name. Sometimes libpng includes zlib bundled inside, others it doesn't, that depens on who is packaging libpng. In your case, seems that libpng you downloaded doesn't include it, so you must provide it externally.