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# ---------------------------------------------------------------------------- # Root CMake file for OpenCV # # From the off-tree build directory, invoke: # $ cmake <PATH_TO_OPENCV_ROOT> # # ---------------------------------------------------------------------------- # Disable in-source builds to prevent source tree corruption. if(" ${CMAKE_SOURCE_DIR}" STREQUAL " ${CMAKE_BINARY_DIR}") message(FATAL_ERROR " FATAL: In-source builds are not allowed. You should create a separate directory for build files. ") endif() include(cmake/OpenCVMinDepVersions.cmake) if(CMAKE_SYSTEM_NAME MATCHES WindowsPhone OR CMAKE_SYSTEM_NAME MATCHES WindowsStore) cmake_minimum_required(VERSION 3.1 FATAL_ERROR) #Required to resolve linker error issues due to incompatibility with CMake v3.0+ policies. #CMake fails to find _fseeko() which leads to subsequent linker error. #See details here: http://www.cmake.org/Wiki/CMake/Policies cmake_policy(VERSION 2.8) else() cmake_minimum_required(VERSION "${MIN_VER_CMAKE}" FATAL_ERROR) endif() # # Configure CMake policies # if(POLICY CMP0026) cmake_policy(SET CMP0026 NEW) endif() if(POLICY CMP0042) cmake_policy(SET CMP0042 NEW) # CMake 3.0+ (2.8.12): MacOS "@rpath" in target's install name endif() if(POLICY CMP0046) cmake_policy(SET CMP0046 NEW) # warn about non-existed dependencies endif() if(POLICY CMP0051) cmake_policy(SET CMP0051 NEW) endif() if(POLICY CMP0054) # CMake 3.1: Only interpret if() arguments as variables or keywords when unquoted. cmake_policy(SET CMP0054 NEW) endif() if(POLICY CMP0056) cmake_policy(SET CMP0056 NEW) # try_compile(): link flags endif() if(POLICY CMP0066) cmake_policy(SET CMP0066 NEW) # CMake 3.7: try_compile(): use per-config flags, like CMAKE_CXX_FLAGS_RELEASE endif() if(POLICY CMP0067) cmake_policy(SET CMP0067 NEW) # CMake 3.8: try_compile(): honor language standard variables (like C++11) endif() if(POLICY CMP0068) cmake_policy(SET CMP0068 NEW) # CMake 3.9+: `RPATH` settings on macOS do not affect `install_name`. endif() if(POLICY CMP0075) cmake_policy(SET CMP0075 NEW) # CMake 3.12+: Include file check macros honor `CMAKE_REQUIRED_LIBRARIES` endif() if(POLICY CMP0077) cmake_policy(SET CMP0077 NEW) # CMake 3.13+: option() honors normal variables. endif() # # Configure OpenCV CMake hooks # include(cmake/OpenCVUtils.cmake) ocv_cmake_reset_hooks() ocv_check_environment_variables(OPENCV_CMAKE_HOOKS_DIR) if(DEFINED OPENCV_CMAKE_HOOKS_DIR) foreach(__dir ${OPENCV_CMAKE_HOOKS_DIR}) get_filename_component(__dir "${__dir}" ABSOLUTE) ocv_cmake_hook_register_dir(${__dir}) endforeach() endif() ocv_cmake_hook(CMAKE_INIT) # must go before the project()/enable_language() commands ocv_update(CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "Configs" FORCE) if(NOT DEFINED CMAKE_BUILD_TYPE AND NOT OPENCV_SKIP_DEFAULT_BUILD_TYPE ) message(STATUS "'Release' build type is used by default. Use CMAKE_BUILD_TYPE to specify build type (Release or Debug)") set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose the type of build") endif() if(DEFINED CMAKE_BUILD_TYPE) set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "${CMAKE_CONFIGURATION_TYPES}") endif() option(ENABLE_PIC "Generate position independent code (necessary for shared libraries)" TRUE) set(CMAKE_POSITION_INDEPENDENT_CODE ${ENABLE_PIC}) ocv_cmake_hook(PRE_CMAKE_BOOTSTRAP) # Bootstrap CMake system: setup CMAKE_SYSTEM_NAME and other vars if(OPENCV_WORKAROUND_CMAKE_20989) set(CMAKE_SYSTEM_PROCESSOR_BACKUP ${CMAKE_SYSTEM_PROCESSOR}) endif() enable_language(CXX C) if(OPENCV_WORKAROUND_CMAKE_20989) set(CMAKE_SYSTEM_PROCESSOR ${CMAKE_SYSTEM_PROCESSOR_BACKUP}) endif() ocv_cmake_hook(POST_CMAKE_BOOTSTRAP) if(NOT OPENCV_SKIP_CMAKE_SYSTEM_FILE) include("cmake/platforms/OpenCV-${CMAKE_SYSTEM_NAME}.cmake" OPTIONAL RESULT_VARIABLE "OPENCV_CMAKE_SYSTEM_FILE") if(NOT OPENCV_CMAKE_SYSTEM_FILE) message(STATUS "OpenCV: system-specific configuration file is not found: '${CMAKE_SYSTEM_NAME}'") endif() endif() if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT) # https://cmake.org/cmake/help/latest/variable/CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT.html if(NOT CMAKE_TOOLCHAIN_FILE) if(WIN32) set(CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/install" CACHE PATH "Installation Directory" FORCE) else() set(CMAKE_INSTALL_PREFIX "/usr/local" CACHE PATH "Installation Directory" FORCE) endif() else() # any cross-compiling set(CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/install" CACHE PATH "Installation Directory" FORCE) endif() endif() enable_testing() project(OpenCV CXX C) if(MSVC) set(CMAKE_USE_RELATIVE_PATHS ON CACHE INTERNAL "" FORCE) endif() ocv_cmake_eval(DEBUG_PRE ONCE) ocv_clear_vars(OpenCVModules_TARGETS) include(cmake/OpenCVDownload.cmake) set(BUILD_LIST "" CACHE STRING "Build only listed modules (comma-separated, e.g. 'videoio,dnn,ts')") # ---------------------------------------------------------------------------- # Break in case of popular CMake configuration mistakes # ---------------------------------------------------------------------------- if(NOT CMAKE_SIZEOF_VOID_P GREATER 0) message(FATAL_ERROR "CMake fails to determine the bitness of the target platform. Please check your CMake and compiler installation. If you are cross-compiling then ensure that your CMake toolchain file correctly sets the compiler details.") endif() # ---------------------------------------------------------------------------- # Detect compiler and target platform architecture # ---------------------------------------------------------------------------- include(cmake/OpenCVDetectCXXCompiler.cmake) ocv_cmake_hook(POST_DETECT_COMPILER) # Add these standard paths to the search paths for FIND_LIBRARY # to find libraries from these locations first if(UNIX AND NOT ANDROID) if(X86_64 OR CMAKE_SIZEOF_VOID_P EQUAL 8) if(EXISTS /lib64) list(APPEND CMAKE_LIBRARY_PATH /lib64) else() list(APPEND CMAKE_LIBRARY_PATH /lib) endif() if(EXISTS /usr/lib64) list(APPEND CMAKE_LIBRARY_PATH /usr/lib64) else() list(APPEND CMAKE_LIBRARY_PATH /usr/lib) endif() elseif(X86 OR CMAKE_SIZEOF_VOID_P EQUAL 4) if(EXISTS /lib32) list(APPEND CMAKE_LIBRARY_PATH /lib32) else() list(APPEND CMAKE_LIBRARY_PATH /lib) endif() if(EXISTS /usr/lib32) list(APPEND CMAKE_LIBRARY_PATH /usr/lib32) else() list(APPEND CMAKE_LIBRARY_PATH /usr/lib) endif() endif() endif() # Add these standard paths to the search paths for FIND_PATH # to find include files from these locations first if(MINGW) if(EXISTS /mingw) list(APPEND CMAKE_INCLUDE_PATH /mingw) endif() if(EXISTS /mingw32) list(APPEND CMAKE_INCLUDE_PATH /mingw32) endif() if(EXISTS /mingw64) list(APPEND CMAKE_INCLUDE_PATH /mingw64) endif() endif() # ---------------------------------------------------------------------------- # OpenCV cmake options # ---------------------------------------------------------------------------- OCV_OPTION(OPENCV_ENABLE_NONFREE "Enable non-free algorithms" OFF) # 3rd party libs OCV_OPTION(OPENCV_FORCE_3RDPARTY_BUILD "Force using 3rdparty code from source" OFF) OCV_OPTION(BUILD_ZLIB "Build zlib from source" (WIN32 OR APPLE OR OPENCV_FORCE_3RDPARTY_BUILD) ) OCV_OPTION(BUILD_TIFF "Build libtiff from source" (WIN32 OR ANDROID OR APPLE OR OPENCV_FORCE_3RDPARTY_BUILD) ) OCV_OPTION(BUILD_OPENJPEG "Build OpenJPEG from source" (WIN32 OR ANDROID OR APPLE OR OPENCV_FORCE_3RDPARTY_BUILD) ) OCV_OPTION(BUILD_JASPER "Build libjasper from source" (WIN32 OR ANDROID OR APPLE OR OPENCV_FORCE_3RDPARTY_BUILD) ) OCV_OPTION(BUILD_JPEG "Build libjpeg from source" (WIN32 OR ANDROID OR APPLE OR OPENCV_FORCE_3RDPARTY_BUILD) ) OCV_OPTION(BUILD_PNG "Build libpng from source"