PNG_USER_PRIVATEBUILD  479 3rdparty/libpng/png.h #ifdef PNG_USER_PRIVATEBUILD /* From pnglibconf.h */
PNG_USER_PRIVATEBUILD  221 3rdparty/libpng/pngconf.h #  if defined(PNGAPI) && !defined(PNG_USER_PRIVATEBUILD)
PNG_USER_PRIVATEBUILD  222 3rdparty/libpng/pngconf.h    ERROR: PNG_USER_PRIVATEBUILD must be defined if PNGAPI is changed
PNG_USER_PRIVATEBUILD   55 3rdparty/libpng/pngpriv.h #  ifndef PNG_USER_PRIVATEBUILD