1# ~~~ 2# Copyright 2018-2023 The Khronos Group Inc. 3# Copyright 2018-2023 Valve Corporation 4# Copyright 2018-2023 LunarG, Inc. 5# 6# SPDX-License-Identifier: Apache-2.0 7# ~~~ 8cmake_minimum_required(VERSION 3.15) 9 10# NOTE: Parsing the version like this is suboptimal but neccessary due to our release process: 11# https://github.com/KhronosGroup/Vulkan-Headers/pull/346 12# 13# As shown a more robust approach would be just to add basic test code to check the project version. 14function(vlk_get_header_version) 15 set(vulkan_core_header_file "${CMAKE_CURRENT_SOURCE_DIR}/include/vulkan/vulkan_core.h") 16 if (NOT EXISTS ${vulkan_core_header_file}) 17 message(FATAL_ERROR "Couldn't find vulkan_core.h!") 18 endif() 19 20 file(READ ${vulkan_core_header_file} ver) 21 22 if (ver MATCHES "#define[ ]+VK_HEADER_VERSION_COMPLETE[ ]+VK_MAKE_API_VERSION\\([ ]*[0-9]+,[ ]*([0-9]+),[ ]*([0-9]+),[ ]*VK_HEADER_VERSION[ ]*\\)") 23 set(MAJOR_VERSION "${CMAKE_MATCH_1}") 24 set(MINOR_VERSION "${CMAKE_MATCH_2}") 25 else() 26 message(FATAL_ERROR "Couldn't get major/minor version") 27 endif() 28 29 if (ver MATCHES "#define[ ]+VK_HEADER_VERSION[ ]+([0-9]+)") 30 set(PATCH_VERSION "${CMAKE_MATCH_1}") 31 else() 32 message(FATAL_ERROR "Couldn't get the patch version") 33 endif() 34 35 set(VK_VERSION_STRING "${MAJOR_VERSION}.${MINOR_VERSION}.${PATCH_VERSION}" PARENT_SCOPE) 36endfunction() 37vlk_get_header_version() 38 39project(VULKAN_HEADERS LANGUAGES C CXX VERSION ${VK_VERSION_STRING}) 40 41add_library(Vulkan-Headers INTERFACE) 42add_library(Vulkan::Headers ALIAS Vulkan-Headers) 43target_include_directories(Vulkan-Headers INTERFACE $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>) 44 45if ((CMAKE_CXX_COMPILER_ID STREQUAL "MSVC" AND (MSVC_VERSION GREATER_EQUAL "1941")) OR 46 # clang-cl doesn't currently support modules 47 (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" 48 AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "16.0" 49 AND (NOT CMAKE_C_COMPILER_FRONTEND_VARIANT MATCHES "MSVC") 50 AND (NOT CMAKE_CXX_COMPILER_CLANG_SCAN_DEPS STREQUAL CMAKE_CXX_COMPILER_CLANG_SCAN_DEPS-NOTFOUND)) OR 51 (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "14.0")) 52 set(COMPILER_SUPPORTS_CXX_MODULES TRUE) 53endif() 54 55option(VULKAN_HEADERS_ENABLE_MODULE "Enables building of the Vulkan C++ module" OFF) 56 57if (VULKAN_HEADERS_ENABLE_MODULE AND (NOT COMPILER_SUPPORTS_CXX_MODULES OR CMAKE_VERSION VERSION_LESS "3.28")) 58 message(WARNING "Vulkan C++ module support is requested but was disabled due to lacking support on this platform") 59endif() 60 61if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.28" AND VULKAN_HEADERS_ENABLE_MODULE AND COMPILER_SUPPORTS_CXX_MODULES) 62 add_library(Vulkan-Module) 63 add_library(Vulkan::VulkanHppModule ALIAS Vulkan-Module) 64 target_sources(Vulkan-Module 65 PUBLIC 66 FILE_SET module 67 TYPE CXX_MODULES 68 BASE_DIRS "${CMAKE_CURRENT_SOURCE_DIR}/include" 69 FILES "${CMAKE_CURRENT_SOURCE_DIR}/include/vulkan/vulkan.cppm" 70 ) 71 target_compile_features(Vulkan-Module PUBLIC cxx_std_20) 72 target_link_libraries(Vulkan-Module PUBLIC Vulkan-Headers) 73endif () 74 75if (CMAKE_VERSION VERSION_LESS "3.21") 76 # https://cmake.org/cmake/help/latest/variable/PROJECT_IS_TOP_LEVEL.html 77 string(COMPARE EQUAL ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_SOURCE_DIR} PROJECT_IS_TOP_LEVEL) 78endif() 79 80option(VULKAN_HEADERS_ENABLE_TESTS "Test Vulkan-Headers" ${PROJECT_IS_TOP_LEVEL}) 81option(VULKAN_HEADERS_ENABLE_INSTALL "Install Vulkan-Headers" ${PROJECT_IS_TOP_LEVEL}) 82 83if (VULKAN_HEADERS_ENABLE_TESTS) 84 enable_testing() # This is only effective in the top level CMakeLists.txt file. 85 add_subdirectory(tests) 86endif() 87 88if (VULKAN_HEADERS_ENABLE_INSTALL) 89 include(GNUInstallDirs) 90 include(CMakePackageConfigHelpers) 91 92 install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/include/vk_video" DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}) 93 install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/include/vulkan" DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}) 94 # Preserve source permissions https://github.com/KhronosGroup/Vulkan-Headers/issues/336 95 install(DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/registry" DESTINATION "${CMAKE_INSTALL_DATADIR}/vulkan" USE_SOURCE_PERMISSIONS) 96 97 set_target_properties(Vulkan-Headers PROPERTIES EXPORT_NAME "Headers") 98 install(TARGETS Vulkan-Headers EXPORT VulkanHeadersConfig INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}) 99 100 install(EXPORT VulkanHeadersConfig NAMESPACE "Vulkan::" DESTINATION "share/cmake/VulkanHeaders") 101 102 set(version_config "${CMAKE_CURRENT_BINARY_DIR}/generated/VulkanHeadersConfigVersion.cmake") 103 write_basic_package_version_file("${version_config}" COMPATIBILITY SameMajorVersion ARCH_INDEPENDENT) 104 install(FILES "${version_config}" DESTINATION "share/cmake/VulkanHeaders") 105endif() 106