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CMakeLists.txt
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CMakeLists.txt
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cmake_minimum_required(VERSION 3.5...3.30)
project(volk VERSION
# VOLK_GENERATE_VERSION
302
# VOLK_GENERATE_VERSION
LANGUAGES C
)
# CMake 3.12 changes the default behaviour of option() to leave local variables
# unchanged if they exist (which we want), but we must work with older CMake versions.
if(NOT DEFINED VOLK_STATIC_DEFINES)
set(VOLK_STATIC_DEFINES "" CACHE STRING "Additional defines for building the volk static library, e.g. Vulkan platform defines")
endif()
if(NOT DEFINED VOLK_PULL_IN_VULKAN)
option(VOLK_PULL_IN_VULKAN "Vulkan as a transitive dependency" ON)
endif()
if(NOT DEFINED VOLK_INSTALL)
option(VOLK_INSTALL "Create installation targets" OFF)
endif()
if(NOT DEFINED VOLK_HEADERS_ONLY)
option(VOLK_HEADERS_ONLY "Add interface library only" OFF)
endif()
if(NOT DEFINED VULKAN_HEADERS_INSTALL_DIR)
set(VULKAN_HEADERS_INSTALL_DIR "" CACHE PATH "Where to get the Vulkan headers")
endif()
# -----------------------------------------------------
# Static library
if(NOT VOLK_HEADERS_ONLY OR VOLK_INSTALL)
add_library(volk STATIC volk.h volk.c)
add_library(volk::volk ALIAS volk)
target_include_directories(volk PUBLIC
$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}>
$<INSTALL_INTERFACE:include>
)
if(VOLK_STATIC_DEFINES)
target_compile_definitions(volk PUBLIC ${VOLK_STATIC_DEFINES})
endif()
if (NOT WIN32)
target_link_libraries(volk PUBLIC ${CMAKE_DL_LIBS})
endif()
endif()
# -----------------------------------------------------
# Interface library
add_library(volk_headers INTERFACE)
add_library(volk::volk_headers ALIAS volk_headers)
target_include_directories(volk_headers INTERFACE
$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}>
$<INSTALL_INTERFACE:include>
)
if (NOT WIN32)
target_link_libraries(volk_headers INTERFACE ${CMAKE_DL_LIBS})
endif()
# -----------------------------------------------------
# Vulkan transitive dependency
if(VOLK_PULL_IN_VULKAN)
# Try an explicit CMake variable first, then any Vulkan paths
# discovered by FindVulkan.cmake, then the $VULKAN_SDK environment
# variable if nothing else works.
if(VULKAN_HEADERS_INSTALL_DIR)
message("volk: using VULKAN_HEADERS_INSTALL_DIR option")
set(VOLK_INCLUDES "${VULKAN_HEADERS_INSTALL_DIR}/include")
else()
# If CMake has the FindVulkan module and it works, use it.
find_package(Vulkan QUIET)
if(Vulkan_INCLUDE_DIRS)
message("volk: using Vulkan_INCLUDE_DIRS from FindVulkan module")
set(VOLK_INCLUDES "${Vulkan_INCLUDE_DIRS}")
elseif(DEFINED ENV{VULKAN_SDK})
message("volk: using VULKAN_SDK environment variable")
set(VOLK_INCLUDES "$ENV{VULKAN_SDK}/include")
endif()
endif()
if(VOLK_INCLUDES)
if(TARGET volk)
target_include_directories(volk PUBLIC "${VOLK_INCLUDES}")
endif()
target_include_directories(volk_headers INTERFACE "${VOLK_INCLUDES}")
endif()
endif()
# -----------------------------------------------------
# Installation
if(VOLK_INSTALL)
include(GNUInstallDirs)
set(INSTALL_CONFIGDIR ${CMAKE_INSTALL_LIBDIR}/cmake/volk)
# Install files
install(FILES volk.h volk.c DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
# Install library target and add it and any dependencies to export set.
install(TARGETS volk volk_headers
EXPORT volk-targets
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
)
# Actually write exported config w/ imported targets
install(EXPORT volk-targets
FILE volkTargets.cmake
NAMESPACE volk::
DESTINATION ${INSTALL_CONFIGDIR}
)
# Create a ConfigVersion.cmake file:
include(CMakePackageConfigHelpers)
write_basic_package_version_file(
${CMAKE_CURRENT_BINARY_DIR}/volkConfigVersion.cmake
COMPATIBILITY AnyNewerVersion
)
# Configure config file
configure_package_config_file(${CMAKE_CURRENT_LIST_DIR}/cmake/volkConfig.cmake.in
${CMAKE_CURRENT_BINARY_DIR}/volkConfig.cmake
INSTALL_DESTINATION ${INSTALL_CONFIGDIR}
)
# Install the fully generated config and configVersion files
install(FILES
${CMAKE_CURRENT_BINARY_DIR}/volkConfig.cmake
${CMAKE_CURRENT_BINARY_DIR}/volkConfigVersion.cmake
DESTINATION ${INSTALL_CONFIGDIR}
)
endif()