#.rst:
# Find GLFW
# ---------
#
# Finds the GLFW library. This module defines:
#
#  GLFW_FOUND               - True if GLFW library is found
#  GLFW::GLFW               - GLFW imported target
#
# Additionally these variables are defined for internal usage:
#
#  GLFW_LIBRARY             - GLFW library
#  GLFW_INCLUDE_DIR         - Root include dir
#

#
#   This file is part of Magnum.
#
#   Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017
#             Vladimír Vondruš <mosra@centrum.cz>
#   Copyright © 2016 Jonathan Hale <squareys@googlemail.com>
#
#   Permission is hereby granted, free of charge, to any person obtaining a
#   copy of this software and associated documentation files (the "Software"),
#   to deal in the Software without restriction, including without limitation
#   the rights to use, copy, modify, merge, publish, distribute, sublicense,
#   and/or sell copies of the Software, and to permit persons to whom the
#   Software is furnished to do so, subject to the following conditions:
#
#   The above copyright notice and this permission notice shall be included
#   in all copies or substantial portions of the Software.
#
#   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
#   THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
#   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
#   DEALINGS IN THE SOFTWARE.
#

find_library(GLFW_LIBRARY NAMES glfw glfw3)

# Include dir
find_path(GLFW_INCLUDE_DIR
    NAMES glfw3.h
    PATH_SUFFIXES GLFW)

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args("GLFW" DEFAULT_MSG
    GLFW_LIBRARY
    GLFW_INCLUDE_DIR)

if(NOT TARGET GLFW::GLFW)
    # CMake 3.0 doesn't propagate the local target as dependency upwards
    # the tree and then complains that GLFW::GLFW target was not found,
    # which it shouldn't. This is reproducible with the base bootstrap
    # project *and* when using Magnum as CMake subproject. Works with both
    # 2.8.12 and 3.1, so I'm assuming this is a CMake 3.0 bug. The
    # workaround is to make the target GLOBAL so it's propagated upwards
    # the tree unconditionally. For some reason, UNKNOWN targets can't be
    # marked as GLOBAL, so I'm  biting the bullet and saying the library is
    # shared -- CMake 3.0 is only on Debian Jessie now and I'm assuming GLFW
    # comes from system package, which *should be* shared. Hopefully this won't
    # bite back in the future.
    if(CMAKE_VERSION VERSION_GREATER "2.8.12.2" AND CMAKE_VERSION VERSION_LESS "3.1.0")
        set(_GLFW_IMPORTED_LIBRARY_KIND SHARED IMPORTED GLOBAL)
    else()
        set(_GLFW_IMPORTED_LIBRARY_KIND UNKNOWN IMPORTED)
    endif()
    add_library(GLFW::GLFW ${_GLFW_IMPORTED_LIBRARY_KIND})

    # Work around BUGGY framework support on OSX
    # https://cmake.org/Bug/view.php?id=14105
    if(CORRADE_TARGET_APPLE AND ${GLFW_LIBRARY} MATCHES "\\.framework$")
        set_property(TARGET GLFW::GLFW PROPERTY IMPORTED_LOCATION ${GLFW_LIBRARY}/GLFW)
    else()
        set_property(TARGET GLFW::GLFW PROPERTY IMPORTED_LOCATION ${GLFW_LIBRARY})
    endif()

    set_property(TARGET GLFW::GLFW PROPERTY
        INTERFACE_INCLUDE_DIRECTORIES ${GLFW_INCLUDE_DIR})
endif()