file(READ "${CMAKE_CURRENT_LIST_DIR}/usage" usage) message(WARNING "find_package(libpng) is deprecated.\n${usage}") include(CMakeFindDependencyMacro) find_dependency(PNG CONFIG) if(NOT TARGET png_shared) add_library(png_shared ALIAS PNG::PNG) endif() if(NOT TARGET png_static) add_library(png_static ALIAS PNG::PNG) endif()