Resolves #185 configure script now supports libpng on MacPorts

liuliu / ccv

C-based/Cached/Core Computer Vision Library, A Modern Computer Vision Library

http://libccv.org

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Resolves #185 configure script now supports libpng on MacPorts #186

Open Yoric opened 8 years ago

Yoric commented 8 years ago

This change uses pkg-config to locate libpng, which should make it more portable across distros/OSes. Also, this change introduces option --with-png, to decide whether to build with libpng (true by default).