set(CMAKE_LEGACY_CYGWIN_WIN32 OFF)


project(GLFW C)

cmake_minimum_required(VERSION 2.8.12)
if (NOT CMAKE_VERSION VERSION_LESS "3.0")

    # Until all major package systems have moved to CMake 3,
    # we stick with the older INSTALL_NAME_DIR mechanism

    cmake_policy(SET CMP0042 OLD)
endif()

set(GLFW_VERSION_MAJOR "3")
set(GLFW_VERSION_MINOR "2")

set(GLFW_VERSION_PATCH "1")
set(GLFW_VERSION_EXTRA "")
set(GLFW_VERSION "${GLFW_VERSION_MAJOR}.${GLFW_VERSION_MINOR}")

set(GLFW_VERSION_FULL "${GLFW_VERSION}.${GLFW_VERSION_PATCH}${GLFW_VERSION_EXTRA}")

set(LIB_SUFFIX "" CACHE STRING "Takes an empty string or 64. Directory where lib will be installed: lib or lib64")


set_property(GLOBAL PROPERTY USE_FOLDERS ON)


option(BUILD_SHARED_LIBS "Build shared libraries" OFF)

option(GLFW_BUILD_EXAMPLES "Build the GLFW example programs" ON)

option(GLFW_BUILD_TESTS "Build the GLFW test programs" ON)

option(GLFW_BUILD_DOCS "Build the GLFW documentation" ON)

option(GLFW_INSTALL "Generate installation target" ON)

option(GLFW_VULKAN_STATIC "Use the Vulkan loader statically linked into application" OFF)

option(GLFW_DOCUMENT_INTERNALS "Include internals in documentation" OFF)


if (WIN32)

    option(GLFW_USE_HYBRID_HPG "Force use of high-performance GPU on hybrid systems" OFF)

endif()


if (APPLE)

    option(GLFW_USE_CHDIR "Make glfwInit chdir to Contents/Resources" ON)

    option(GLFW_USE_MENUBAR "Populate the menu bar on first window creation" ON)

    option(GLFW_USE_RETINA "Use the full resolution of Retina displays" ON)

endif()


if (UNIX AND NOT APPLE)

    option(GLFW_USE_WAYLAND "Use Wayland for window creation" OFF)

    option(GLFW_USE_MIR     "Use Mir for window creation" OFF)

endif()


if (MSVC)

    option(USE_MSVC_RUNTIME_LIBRARY_DLL "Use MSVC runtime library DLL" ON)

endif()


if (BUILD_SHARED_LIBS)

    set(_GLFW_BUILD_DLL 1)

endif()


if (BUILD_SHARED_LIBS AND UNIX)

    # On Unix-like systems, shared libraries can use the soname system.

    set(GLFW_LIB_NAME glfw)

else()

    set(GLFW_LIB_NAME glfw3)

endif()


if (GLFW_VULKAN_STATIC)

    set(_GLFW_VULKAN_STATIC 1)

endif()


list(APPEND CMAKE_MODULE_PATH "${GLFW_SOURCE_DIR}/CMake/modules")


find_package(Threads REQUIRED)

find_package(Vulkan)


if (GLFW_BUILD_DOCS)

    set(DOXYGEN_SKIP_DOT TRUE)

    find_package(Doxygen)

endif()


#--------------------------------------------------------------------

# Set compiler specific flags

#--------------------------------------------------------------------

if (MSVC)

    if (NOT USE_MSVC_RUNTIME_LIBRARY_DLL)

        foreach (flag CMAKE_C_FLAGS

                      CMAKE_C_FLAGS_DEBUG

                      CMAKE_C_FLAGS_RELEASE

                      CMAKE_C_FLAGS_MINSIZEREL

                      CMAKE_C_FLAGS_RELWITHDEBINFO)


            if (${flag} MATCHES "/MD")

                string(REGEX REPLACE "/MD" "/MT" ${flag} "${${flag}}")

            endif()

            if (${flag} MATCHES "/MDd")

                string(REGEX REPLACE "/MDd" "/MTd" ${flag} "${${flag}}")

            endif()


        endforeach()

    endif()

endif()


if (MINGW)

    # Workaround for legacy MinGW not providing XInput and DirectInput

    include(CheckIncludeFile)


    check_include_file(dinput.h DINPUT_H_FOUND)

    check_include_file(xinput.h XINPUT_H_FOUND)

    if (NOT DINPUT_H_FOUND OR NOT XINPUT_H_FOUND)

        list(APPEND glfw_INCLUDE_DIRS "${GLFW_SOURCE_DIR}/deps/mingw")

    endif()


    # Enable link-time exploit mitigation features enabled by default on MSVC

    include(CheckCCompilerFlag)


    # Compatibility with data execution prevention (DEP)

    set(CMAKE_REQUIRED_FLAGS "-Wl,--nxcompat")

    check_c_compiler_flag("" _GLFW_HAS_DEP)

    if (_GLFW_HAS_DEP)

        set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--nxcompat ${CMAKE_SHARED_LINKER_FLAGS}")

    endif()


    # Compatibility with address space layout randomization (ASLR)

    set(CMAKE_REQUIRED_FLAGS "-Wl,--dynamicbase")

    check_c_compiler_flag("" _GLFW_HAS_ASLR)

    if (_GLFW_HAS_ASLR)

        set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--dynamicbase ${CMAKE_SHARED_LINKER_FLAGS}")

    endif()


    # Compatibility with 64-bit address space layout randomization (ASLR)

    set(CMAKE_REQUIRED_FLAGS "-Wl,--high-entropy-va")

    check_c_compiler_flag("" _GLFW_HAS_64ASLR)

    if (_GLFW_HAS_64ASLR)

        set(CMAKE_SHARED_LINKER_FLAGS "-Wl,--high-entropy-va ${CMAKE_SHARED_LINKER_FLAGS}")

    endif()

endif()


#--------------------------------------------------------------------

# Detect and select backend APIs

#--------------------------------------------------------------------

if (WIN32)

    set(_GLFW_WIN32 1)

    message(STATUS "Using Win32 for window creation")

elseif (APPLE)

    set(_GLFW_COCOA 1)

    message(STATUS "Using Cocoa for window creation")

elseif (UNIX)

    if (GLFW_USE_WAYLAND)

        set(_GLFW_WAYLAND 1)

        message(STATUS "Using Wayland for window creation")

    elseif (GLFW_USE_MIR)

        set(_GLFW_MIR 1)

        message(STATUS "Using Mir for window creation")

    else()

        set(_GLFW_X11 1)

        message(STATUS "Using X11 for window creation")

    endif()

else()

    message(FATAL_ERROR "No supported platform was detected")

endif()


#--------------------------------------------------------------------

# Add Vulkan static library if requested

#--------------------------------------------------------------------

if (GLFW_VULKAN_STATIC)

    if (VULKAN_FOUND AND VULKAN_STATIC_LIBRARY)

        list(APPEND glfw_LIBRARIES ${VULKAN_STATIC_LIBRARY})

    else()

        if (BUILD_SHARED_LIBS OR GLFW_BUILD_EXAMPLES OR GLFW_BUILD_TESTS)

            message(FATAL_ERROR "Vulkan loader static library not found")

        else()

            message(WARNING "Vulkan loader static library not found")

        endif()

    endif()

endif()


#--------------------------------------------------------------------

# Find and add Unix math and time libraries

#--------------------------------------------------------------------

if (UNIX AND NOT APPLE)

    find_library(RT_LIBRARY rt)

    mark_as_advanced(RT_LIBRARY)

    if (RT_LIBRARY)

        list(APPEND glfw_LIBRARIES "${RT_LIBRARY}")

        list(APPEND glfw_PKG_LIBS "-lrt")

    endif()


    find_library(MATH_LIBRARY m)

    mark_as_advanced(MATH_LIBRARY)

    if (MATH_LIBRARY)

        list(APPEND glfw_LIBRARIES "${MATH_LIBRARY}")

        list(APPEND glfw_PKG_LIBS "-lm")

    endif()


    if (CMAKE_DL_LIBS)

        list(APPEND glfw_LIBRARIES "${CMAKE_DL_LIBS}")

        list(APPEND glfw_PKG_LIBS "-l${CMAKE_DL_LIBS}")

    endif()

endif()


#--------------------------------------------------------------------

# Use Win32 for window creation

#--------------------------------------------------------------------

if (_GLFW_WIN32)


    list(APPEND glfw_PKG_LIBS "-lgdi32")


    if (GLFW_USE_HYBRID_HPG)

        set(_GLFW_USE_HYBRID_HPG 1)

    endif()

endif()


#--------------------------------------------------------------------

# Use X11 for window creation

#--------------------------------------------------------------------

if (_GLFW_X11)


    find_package(X11 REQUIRED)


    list(APPEND glfw_PKG_DEPS "x11")


    # Set up library and include paths

    list(APPEND glfw_INCLUDE_DIRS "${X11_X11_INCLUDE_PATH}")

    list(APPEND glfw_LIBRARIES "${X11_X11_LIB}" "${CMAKE_THREAD_LIBS_INIT}")


    # Check for XRandR (modern resolution switching and gamma control)

    if (NOT X11_Xrandr_FOUND)

        message(FATAL_ERROR "The RandR library and headers were not found")

    endif()


    list(APPEND glfw_INCLUDE_DIRS "${X11_Xrandr_INCLUDE_PATH}")

    list(APPEND glfw_LIBRARIES "${X11_Xrandr_LIB}")

    list(APPEND glfw_PKG_DEPS "xrandr")


    # Check for Xinerama (legacy multi-monitor support)

    if (NOT X11_Xinerama_FOUND)

        message(FATAL_ERROR "The Xinerama library and headers were not found")

    endif()


    list(APPEND glfw_INCLUDE_DIRS "${X11_Xinerama_INCLUDE_PATH}")

    list(APPEND glfw_LIBRARIES "${X11_Xinerama_LIB}")

    list(APPEND glfw_PKG_DEPS "xinerama")


    # Check for Xf86VidMode (fallback gamma control)

    if (X11_xf86vmode_FOUND)

        list(APPEND glfw_INCLUDE_DIRS "${X11_xf86vmode_INCLUDE_PATH}")

        list(APPEND glfw_PKG_DEPS "xxf86vm")


        if (X11_Xxf86vm_LIB)

            list(APPEND glfw_LIBRARIES "${X11_Xxf86vm_LIB}")

        else()

            # Backwards compatibility (see CMake bug 0006976)

            list(APPEND glfw_LIBRARIES Xxf86vm)

        endif()


        set(_GLFW_HAS_XF86VM TRUE)

    endif()


    # Check for Xkb (X keyboard extension)

    if (NOT X11_Xkb_FOUND)

        message(FATAL_ERROR "The X keyboard extension headers were not found")

    endif()


    list(APPEND glfw_INCLUDE_DIR "${X11_Xkb_INCLUDE_PATH}")


    # Check for Xcursor

    if (NOT X11_Xcursor_FOUND)

        message(FATAL_ERROR "The Xcursor libraries and headers were not found")

    endif()


    list(APPEND glfw_INCLUDE_DIR "${X11_Xcursor_INCLUDE_PATH}")

    list(APPEND glfw_LIBRARIES "${X11_Xcursor_LIB}")

    list(APPEND glfw_PKG_DEPS "xcursor")


endif()


#--------------------------------------------------------------------

# Use Wayland for window creation

#--------------------------------------------------------------------

if (_GLFW_WAYLAND)

    find_package(ECM REQUIRED NO_MODULE)

    list(APPEND CMAKE_MODULE_PATH ${ECM_MODULE_PATH})


    find_package(Wayland REQUIRED)

    find_package(WaylandScanner REQUIRED)

    find_package(WaylandProtocols 1.1 REQUIRED)


    list(APPEND glfw_PKG_DEPS "wayland-egl")


    list(APPEND glfw_INCLUDE_DIRS "${Wayland_INCLUDE_DIR}")

    list(APPEND glfw_LIBRARIES "${Wayland_LIBRARIES}" "${CMAKE_THREAD_LIBS_INIT}")


    find_package(XKBCommon REQUIRED)

    list(APPEND glfw_PKG_DEPS "xkbcommon")

    list(APPEND glfw_INCLUDE_DIRS "${XKBCOMMON_INCLUDE_DIRS}")

    list(APPEND glfw_LIBRARIES "${XKBCOMMON_LIBRARY}")

endif()


#--------------------------------------------------------------------

# Use Mir for window creation

#--------------------------------------------------------------------

if (_GLFW_MIR)

    find_package(Mir REQUIRED)

    list(APPEND glfw_PKG_DEPS "mirclient")


    list(APPEND glfw_INCLUDE_DIRS "${MIR_INCLUDE_DIR}")

    list(APPEND glfw_LIBRARIES "${MIR_LIBRARIES}" "${CMAKE_THREAD_LIBS_INIT}")


    find_package(XKBCommon REQUIRED)

    list(APPEND glfw_PKG_DEPS "xkbcommon")

    list(APPEND glfw_INCLUDE_DIRS "${XKBCOMMON_INCLUDE_DIRS}")

    list(APPEND glfw_LIBRARIES "${XKBCOMMON_LIBRARY}")

endif()


#--------------------------------------------------------------------

# Use Cocoa for window creation and NSOpenGL for context creation

#--------------------------------------------------------------------

if (_GLFW_COCOA)


    if (GLFW_USE_MENUBAR)

        set(_GLFW_USE_MENUBAR 1)

    endif()


    if (GLFW_USE_CHDIR)

        set(_GLFW_USE_CHDIR 1)

    endif()


    if (GLFW_USE_RETINA)

        set(_GLFW_USE_RETINA 1)

    endif()

    # Set up library and include paths

    find_library(COCOA_FRAMEWORK Cocoa)

    find_library(IOKIT_FRAMEWORK IOKit)

    find_library(CORE_FOUNDATION_FRAMEWORK CoreFoundation)

    find_library(CORE_VIDEO_FRAMEWORK CoreVideo)

    mark_as_advanced(COCOA_FRAMEWORK

                     IOKIT_FRAMEWORK

                     CORE_FOUNDATION_FRAMEWORK

                     CORE_VIDEO_FRAMEWORK)

    list(APPEND glfw_LIBRARIES "${COCOA_FRAMEWORK}"

                               "${IOKIT_FRAMEWORK}"

                               "${CORE_FOUNDATION_FRAMEWORK}"

                               "${CORE_VIDEO_FRAMEWORK}")


    set(glfw_PKG_DEPS "")

    set(glfw_PKG_LIBS "-framework Cocoa -framework IOKit -framework CoreFoundation -framework CoreVideo")

endif()


#--------------------------------------------------------------------

# Export GLFW library dependencies

#--------------------------------------------------------------------

foreach(arg ${glfw_PKG_DEPS})

    set(GLFW_PKG_DEPS "${GLFW_PKG_DEPS} ${arg}")

endforeach()

foreach(arg ${glfw_PKG_LIBS})

    set(GLFW_PKG_LIBS "${GLFW_PKG_LIBS} ${arg}")

endforeach()


#--------------------------------------------------------------------

# Create generated files

#--------------------------------------------------------------------

include(CMakePackageConfigHelpers)


set(GLFW_CONFIG_PATH "lib${LIB_SUFFIX}/cmake/glfw3")


configure_package_config_file(src/glfw3Config.cmake.in

                              src/glfw3Config.cmake

                              INSTALL_DESTINATION "${GLFW_CONFIG_PATH}"

                              NO_CHECK_REQUIRED_COMPONENTS_MACRO)


write_basic_package_version_file(src/glfw3ConfigVersion.cmake

                                 VERSION ${GLFW_VERSION_FULL}

                                 COMPATIBILITY SameMajorVersion)


configure_file(src/glfw_config.h.in src/glfw_config.h @ONLY)


configure_file(src/glfw3.pc.in src/glfw3.pc @ONLY)


#--------------------------------------------------------------------

# Add subdirectories
#--------------------------------------------------------------------

add_subdirectory(src)


if (GLFW_BUILD_EXAMPLES)

    add_subdirectory(examples)

endif()


if (GLFW_BUILD_TESTS)

    add_subdirectory(tests)

endif()


if (DOXYGEN_FOUND AND GLFW_BUILD_DOCS)

    add_subdirectory(docs)

endif()


#--------------------------------------------------------------------

# Install files other than the library

# The library is installed by src/CMakeLists.txt

#--------------------------------------------------------------------

if (GLFW_INSTALL)

    install(DIRECTORY include/GLFW DESTINATION include

            FILES_MATCHING PATTERN glfw3.h PATTERN glfw3native.h)


    install(FILES "${GLFW_BINARY_DIR}/src/glfw3Config.cmake"

                  "${GLFW_BINARY_DIR}/src/glfw3ConfigVersion.cmake"

            DESTINATION "${GLFW_CONFIG_PATH}")


    install(EXPORT glfwTargets FILE glfw3Targets.cmake

            EXPORT_LINK_INTERFACE_LIBRARIES

            DESTINATION "${GLFW_CONFIG_PATH}")

    install(FILES "${GLFW_BINARY_DIR}/src/glfw3.pc"

            DESTINATION "lib${LIB_SUFFIX}/pkgconfig")


    # Only generate this target if no higher-level project already has

    if (NOT TARGET uninstall)

        configure_file(cmake_uninstall.cmake.in

                       cmake_uninstall.cmake IMMEDIATE @ONLY)


        add_custom_target(uninstall

                          "${CMAKE_COMMAND}" -P

                          "${GLFW_BINARY_DIR}/cmake_uninstall.cmake")

    endif()

endif()