qt5base-lts/cmake/FindWrapVulkanHeaders.cmake

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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: BSD-3-Clause
# We can't create the same interface imported target multiple times, CMake will complain if we do
# that. This can happen if the find_package call is done in multiple different subdirectories.
if(TARGET WrapVulkanHeaders::WrapVulkanHeaders)
set(WrapVulkanHeaders_FOUND ON)
return()
endif()
set(WrapVulkanHeaders_FOUND OFF)
find_package(Vulkan ${WrapVulkanHeaders_FIND_VERSION} QUIET)
# We are interested only in include headers. The libraries might be missing, so we can't check the
# _FOUND variable.
if(Vulkan_INCLUDE_DIR)
set(WrapVulkanHeaders_FOUND ON)
add_library(WrapVulkanHeaders::WrapVulkanHeaders INTERFACE IMPORTED)
target_include_directories(WrapVulkanHeaders::WrapVulkanHeaders INTERFACE
${Vulkan_INCLUDE_DIR})
CMake: Make WrapVulkanHeaders target optional for QtGui consumers If Vulkan headers are present on the system when qtbase is configured, QtGui and QtOpenGL should be compiled with Vulkan support. If a user project uses a Qt built with Vulkan support, but their system is missing Vulkan headers, the project configuration needs to succeed. The project will get compilation errors if it uses Vulkan headers, but that's intended. This use case was broken when fixing Vulkan to be found when building Qt for Android. Fix the regression with a combination of things 1) Mark the WrapVulkanHeaders package as optional (already the case) 2) Use the include directories directly when compiling Gui and OpenGL 3) Propagate WrapVulkanHeaders::WrapVulkanHeaders link requirement to consumers only if the target exists. It won't exist if Vulkan include dirs are not found This also requires some changes in pri and prl file generation. For prl file generation, we don't want to link to the WrapVulkanHeaders target, so we filter out all dependencies that use TARGET_NAME_IF_EXISTS for anything that calls __qt_internal_walk_libs which includes qt_collect_libs. For pri files, we make sure to generate a uses=vulkan/nolink clause by inspecting a new _qt_is_nolink_target property on the target. We also don't add include dirs to the pri file if the new _qt_skip_include_dir_for_pri property is set. This is intended for Vulkan, because there is separate qmake logic to try and find the include dirs when configuring a user project. As a drive-by, fix nolink handling for WrapOpenSSLHeaders. Amends bb25536a3db657b41ae31e1690d230ef8722b57d Amends 7b9904849fe1a43f0db8216076a9e974ebca5c78 Pick-to: 6.2 Fixes: QTBUG-95391 Change-Id: I21e2f4be5c386f9e40033e4691f4786a91ba0e2d Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Alexey Edelev <alexey.edelev@qt.io> Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
2021-07-27 11:54:56 +00:00
set_target_properties(WrapVulkanHeaders::WrapVulkanHeaders PROPERTIES
_qt_is_nolink_target TRUE)
set_target_properties(WrapVulkanHeaders::WrapVulkanHeaders PROPERTIES
_qt_skip_include_dir_for_pri TRUE)
# Also propagate MoltenVK include directory on Apple platforms if found.
if(APPLE)
# Check for the LunarG Vulkan SDK folder structure.
set(__qt_molten_vk_include_path "${Vulkan_INCLUDE_DIR}/../../MoltenVK/include")
get_filename_component(
__qt_molten_vk_include_path
"${__qt_molten_vk_include_path}" ABSOLUTE)
if(EXISTS "${__qt_molten_vk_include_path}")
target_include_directories(WrapVulkanHeaders::WrapVulkanHeaders INTERFACE
${__qt_molten_vk_include_path})
endif()
# Check for homebrew molten-vk folder structure
set(__qt_molten_vk_homebrew_include_path "${Vulkan_INCLUDE_DIR}/../../include")
get_filename_component(
__qt_molten_vk_homebrew_include_path
"${__qt_molten_vk_homebrew_include_path}" ABSOLUTE)
if(EXISTS "${__qt_molten_vk_homebrew_include_path}")
target_include_directories(WrapVulkanHeaders::WrapVulkanHeaders INTERFACE
${__qt_molten_vk_homebrew_include_path})
endif()
# Check for homebrew vulkan-headers folder structure
# If instead of molten-vk folder, CMAKE_PREFIX_PATH points to Homebrew's
# vulkan-headers installation, then we will not be able to find molten-vk
# headers. If we assume that user has installed the molten-vk formula as
# well, then we might have a chance to pick it up like this.
if(Vulkan_INCLUDE_DIR MATCHES "/homebrew/Cellar/")
set(__qt_standalone_molten_vk_homebrew_include_path
"${Vulkan_INCLUDE_DIR}/../../../../opt/molten-vk/include")
else()
set(__qt_standalone_molten_vk_homebrew_include_path
"${Vulkan_INCLUDE_DIR}/../../molten-vk/include")
endif()
get_filename_component(
__qt_standalone_molten_vk_homebrew_include_path
"${__qt_standalone_molten_vk_homebrew_include_path}" ABSOLUTE)
if(EXISTS "${__qt_standalone_molten_vk_homebrew_include_path}")
target_include_directories(WrapVulkanHeaders::WrapVulkanHeaders INTERFACE
${__qt_standalone_molten_vk_homebrew_include_path})
endif()
endif()
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(WrapVulkanHeaders DEFAULT_MSG Vulkan_INCLUDE_DIR)