if("${CMAKE_CXX_COMPILER};${CMAKE_C_COMPILER};${CMAKE_CXX_COMPILER_LAUNCHER}" MATCHES "ccache") set(CMAKE_COMPILER_IS_CCACHE 1) # TODO: FIXIT Avoid setting of CMAKE_ variables set(OPENCV_COMPILER_IS_CCACHE 1) endif() function(access_CMAKE_COMPILER_IS_CCACHE) if(NOT OPENCV_SUPPRESS_DEPRECATIONS) message(WARNING "DEPRECATED: CMAKE_COMPILER_IS_CCACHE is replaced to OPENCV_COMPILER_IS_CCACHE.") endif() endfunction() variable_watch(CMAKE_COMPILER_IS_CCACHE access_CMAKE_COMPILER_IS_CCACHE) if(ENABLE_CCACHE AND NOT OPENCV_COMPILER_IS_CCACHE) # This works fine with Unix Makefiles and Ninja generators find_host_program(CCACHE_PROGRAM ccache) if(CCACHE_PROGRAM) message(STATUS "Looking for ccache - found (${CCACHE_PROGRAM})") get_property(__OLD_RULE_LAUNCH_COMPILE GLOBAL PROPERTY RULE_LAUNCH_COMPILE) if(CMAKE_GENERATOR MATCHES "Xcode") configure_file("${CMAKE_CURRENT_LIST_DIR}/templates/xcode-launch-c.in" "${CMAKE_BINARY_DIR}/xcode-launch-c") configure_file("${CMAKE_CURRENT_LIST_DIR}/templates/xcode-launch-cxx.in" "${CMAKE_BINARY_DIR}/xcode-launch-cxx") execute_process(COMMAND chmod a+rx "${CMAKE_BINARY_DIR}/xcode-launch-c" "${CMAKE_BINARY_DIR}/xcode-launch-cxx" ) # Xcode project attributes set(CMAKE_XCODE_ATTRIBUTE_CC "${CMAKE_BINARY_DIR}/xcode-launch-c") set(CMAKE_XCODE_ATTRIBUTE_CXX "${CMAKE_BINARY_DIR}/xcode-launch-cxx") set(CMAKE_XCODE_ATTRIBUTE_LD "${CMAKE_BINARY_DIR}/xcode-launch-c") set(CMAKE_XCODE_ATTRIBUTE_LDPLUSPLUS "${CMAKE_BINARY_DIR}/xcode-launch-cxx") set(OPENCV_COMPILER_IS_CCACHE 1) message(STATUS "ccache: enable support through Xcode project properties") elseif(__OLD_RULE_LAUNCH_COMPILE) message(STATUS "Can't replace CMake compiler launcher") else() set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${CCACHE_PROGRAM}") # NOTE: Actually this check doesn't work as expected. # "RULE_LAUNCH_COMPILE" is ignored by CMake during try_compile() step. # ocv_check_compiler_flag(CXX "" IS_CCACHE_WORKS) set(IS_CCACHE_WORKS 1) if(IS_CCACHE_WORKS) set(OPENCV_COMPILER_IS_CCACHE 1) else() message(STATUS "Unable to compile program with enabled ccache, reverting...") set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${__OLD_RULE_LAUNCH_COMPILE}") endif() endif() else() message(STATUS "Looking for ccache - not found") endif() endif() if((CV_CLANG AND NOT CMAKE_GENERATOR MATCHES "Xcode") # PCH has no support for Clang OR OPENCV_COMPILER_IS_CCACHE ) set(ENABLE_PRECOMPILED_HEADERS OFF CACHE BOOL "" FORCE) endif() macro(add_extra_compiler_option option) ocv_check_flag_support(CXX "${option}" _varname "${OPENCV_EXTRA_CXX_FLAGS} ${ARGN}") if(${_varname}) set(OPENCV_EXTRA_CXX_FLAGS "${OPENCV_EXTRA_CXX_FLAGS} ${option}") endif() ocv_check_flag_support(C "${option}" _varname "${OPENCV_EXTRA_C_FLAGS} ${ARGN}") if(${_varname}) set(OPENCV_EXTRA_C_FLAGS "${OPENCV_EXTRA_C_FLAGS} ${option}") endif() endmacro() macro(add_extra_compiler_option_force option) set(OPENCV_EXTRA_CXX_FLAGS "${OPENCV_EXTRA_CXX_FLAGS} ${option}") set(OPENCV_EXTRA_C_FLAGS "${OPENCV_EXTRA_C_FLAGS} ${option}") endmacro() # Gets environment variable and puts its value to the corresponding preprocessor definition # Useful for WINRT that has no access to environment variables macro(add_env_definitions option) set(value $ENV{${option}}) if("${value}" STREQUAL "") message(WARNING "${option} environment variable is empty. Please set it to appropriate location to get correct results") else() string(REPLACE "\\" "\\\\" value ${value}) endif() add_definitions("-D${option}=\"${value}\"") endmacro() if(NOT MSVC) # OpenCV fails some tests when 'char' is 'unsigned' by default add_extra_compiler_option(-fsigned-char) endif() if(MSVC) if(NOT " ${CMAKE_CXX_FLAGS} ${OPENCV_EXTRA_FLAGS} ${OPENCV_EXTRA_CXX_FLAGS}" MATCHES " /fp:") if(ENABLE_FAST_MATH) add_extra_compiler_option("/fp:fast") else() add_extra_compiler_option("/fp:precise") endif() endif() elseif(CV_ICC) if(NOT " ${CMAKE_CXX_FLAGS} ${OPENCV_EXTRA_FLAGS} ${OPENCV_EXTRA_CXX_FLAGS}" MATCHES " /fp:" AND NOT " ${CMAKE_CXX_FLAGS} ${OPENCV_EXTRA_FLAGS} ${OPENCV_EXTRA_CXX_FLAGS}" MATCHES " -fp-model" ) if(NOT ENABLE_FAST_MATH) add_extra_compiler_option("-fp-model precise") endif() endif() elseif(CV_GCC OR CV_CLANG) if(ENABLE_FAST_MATH) add_extra_compiler_option(-ffast-math) endif() endif() if(CV_GCC OR CV_CLANG) # High level of warnings. add_extra_compiler_option(-W) if (NOT MSVC) # clang-cl interprets -Wall as MSVC would: -Weverything, which is more than # we want. add_extra_compiler_option(-Wall) endif() add_extra_compiler_option(-Wreturn-type) add_extra_compiler_option(-Wnon-virtual-dtor) add_extra_compiler_option(-Waddress) add_extra_compiler_option(-Wsequence-point) add_extra_compiler_option(-Wformat) add_extra_compiler_option(-Wformat-security -Wformat) add_extra_compiler_option(-Wmissing-declarations) add_extra_compiler_option(-Wmissing-prototypes) add_extra_compiler_option(-Wstrict-prototypes) add_extra_compiler_option(-Wundef) add_extra_compiler_option(-Winit-self) add_extra_compiler_option(-Wpointer-arith) add_extra_compiler_option(-Wshadow) add_extra_compiler_option(-Wsign-promo) add_extra_compiler_option(-Wuninitialized) if(CV_GCC AND (CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 6.0) AND (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0 OR ARM)) add_extra_compiler_option(-Wno-psabi) endif() if(HAVE_CXX11) if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND NOT ENABLE_PRECOMPILED_HEADERS) add_extra_compiler_option(-Wsuggest-override) elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang") add_extra_compiler_option(-Winconsistent-missing-override) endif() endif() if(ENABLE_NOISY_WARNINGS) add_extra_compiler_option(-Wcast-align) add_extra_compiler_option(-Wstrict-aliasing=2) else() add_extra_compiler_option(-Wno-delete-non-virtual-dtor) add_extra_compiler_option(-Wno-unnamed-type-template-args) add_extra_compiler_option(-Wno-comment) if(NOT OPENCV_SKIP_IMPLICIT_FALLTHROUGH AND NOT " ${CMAKE_CXX_FLAGS} ${OPENCV_EXTRA_FLAGS} ${OPENCV_EXTRA_CXX_FLAGS}" MATCHES "implicit-fallthrough" AND (CV_GCC AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0.0) ) add_extra_compiler_option(-Wimplicit-fallthrough=3) endif() if(CV_GCC AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 7.0) add_extra_compiler_option(-Wno-strict-overflow) # Issue appears when compiling surf.cpp from opencv_contrib/modules/xfeatures2d endif() if(CV_GCC AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0) add_extra_compiler_option(-Wno-missing-field-initializers) # GCC 4.x emits warnings about {}, fixed in GCC 5+ endif() if(CV_CLANG AND NOT CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang" AND NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 10.0) add_extra_compiler_option(-Wno-deprecated-enum-enum-conversion) add_extra_compiler_option(-Wno-deprecated-anon-enum-enum-conversion) endif() endif() add_extra_compiler_option(-fdiagnostics-show-option) # The -Wno-long-long is required in 64bit systems when including system headers. if(X86_64) add_extra_compiler_option(-Wno-long-long) endif() # We need pthread's if((UNIX AND NOT ANDROID AND NOT (APPLE AND CV_CLANG) AND NOT EMSCRIPTEN ) OR (EMSCRIPTEN AND WITH_PTHREADS_PF) # https://github.com/opencv/opencv/issues/20285 ) add_extra_compiler_option(-pthread) endif() if(CV_CLANG) add_extra_compiler_option(-Qunused-arguments) endif() if(OPENCV_WARNINGS_ARE_ERRORS) add_extra_compiler_option(-Werror) endif() if(APPLE) add_extra_compiler_option(-Wno-semicolon-before-method-body) endif() # Other optimizations if(ENABLE_OMIT_FRAME_POINTER) add_extra_compiler_option(-fomit-frame-pointer) elseif(DEFINED ENABLE_OMIT_FRAME_POINTER) add_extra_compiler_option(-fno-omit-frame-pointer) endif() # Profiling? if(ENABLE_PROFILING) # turn off incompatible options foreach(flags CMAKE_CXX_FLAGS CMAKE_C_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_C_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG CMAKE_C_FLAGS_DEBUG OPENCV_EXTRA_FLAGS_RELEASE OPENCV_EXTRA_FLAGS_DEBUG OPENCV_EXTRA_C_FLAGS OPENCV_EXTRA_CXX_FLAGS) string(REPLACE "-fomit-frame-pointer" "" ${flags} "${${flags}}") string(REPLACE "-ffunction-sections" "" ${flags} "${${flags}}") string(REPLACE "-fdata-sections" "" ${flags} "${${flags}}") endforeach() # -pg should be placed both in the linker and in the compiler settings set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pg") add_extra_compiler_option("-pg -g") else() if(MSVC) # TODO: Clang/C2 is not supported elseif(((IOS OR ANDROID) AND NOT BUILD_SHARED_LIBS) AND NOT OPENCV_FORCE_FUNCTIONS_SECTIONS) # don't create separate sections for functions/data, reduce package size else() # Remove unreferenced functions: function level linking add_extra_compiler_option(-ffunction-sections) add_extra_compiler_option(-fdata-sections) if(NOT OPENCV_SKIP_GC_SECTIONS) if(APPLE) set(OPENCV_EXTRA_EXE_LINKER_FLAGS "${OPENCV_EXTRA_EXE_LINKER_FLAGS} -Wl,-dead_strip") set(OPENCV_EXTRA_SHARED_LINKER_FLAGS "${OPENCV_EXTRA_SHARED_LINKER_FLAGS} -Wl,-dead_strip") set(OPENCV_EXTRA_MODULE_LINKER_FLAGS "${OPENCV_EXTRA_MODULE_LINKER_FLAGS} -Wl,-dead_strip") else() set(OPENCV_EXTRA_EXE_LINKER_FLAGS "${OPENCV_EXTRA_EXE_LINKER_FLAGS} -Wl,--gc-sections") set(OPENCV_EXTRA_SHARED_LINKER_FLAGS "${OPENCV_EXTRA_SHARED_LINKER_FLAGS} -Wl,--gc-sections") set(OPENCV_EXTRA_MODULE_LINKER_FLAGS "${OPENCV_EXTRA_MODULE_LINKER_FLAGS} -Wl,--gc-sections") endif() endif() endif() endif() if(ENABLE_COVERAGE) set(OPENCV_EXTRA_C_FLAGS "${OPENCV_EXTRA_C_FLAGS} --coverage") set(OPENCV_EXTRA_CXX_FLAGS "${OPENCV_EXTRA_CXX_FLAGS} --coverage") set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} --coverage") endif() if(ENABLE_INSTRUMENTATION) if(NOT HAVE_CXX11) message(WARNING "ENABLE_INSTRUMENTATION requires C++11 support") endif() set(WITH_VTK OFF) # There are issues with VTK 6.0 endif() if(ENABLE_LTO) add_extra_compiler_option(-flto) endif() if(ENABLE_THIN_LTO) add_extra_compiler_option(-flto=thin) endif() set(OPENCV_EXTRA_FLAGS_RELEASE "${OPENCV_EXTRA_FLAGS_RELEASE} -DNDEBUG") if(NOT " ${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_DEBUG} ${OPENCV_EXTRA_FLAGS_DEBUG} " MATCHES "-O") set(OPENCV_EXTRA_FLAGS_DEBUG "${OPENCV_EXTRA_FLAGS_DEBUG} -O0") endif() set(OPENCV_EXTRA_FLAGS_DEBUG "${OPENCV_EXTRA_FLAGS_DEBUG} -DDEBUG -D_DEBUG") if(BUILD_WITH_DEBUG_INFO) # https://gcc.gnu.org/onlinedocs/gcc/Debugging-Options.html # '-g' is equal to '-g2', '-g1' produces minimal information, enough for making backtraces ocv_update(OPENCV_DEBUG_OPTION "-g1") if(NOT " ${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_RELEASE} ${OPENCV_EXTRA_CXX_FLAGS} ${OPENCV_EXTRA_FLAGS_RELEASE}" MATCHES " -g") set(OPENCV_EXTRA_FLAGS_RELEASE "${OPENCV_EXTRA_FLAGS_RELEASE} ${OPENCV_DEBUG_OPTION}") endif() endif() endif() if(MSVC) #TODO Code refactoring is required to resolve security warnings #if(NOT ENABLE_BUILD_HARDENING) set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS") #endif() if(BUILD_WITH_DEBUG_INFO) set(OPENCV_EXTRA_FLAGS_RELEASE "${OPENCV_EXTRA_FLAGS_RELEASE} /Zi") set(OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE "${OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE} /debug") set(OPENCV_EXTRA_SHARED_LINKER_FLAGS_RELEASE "${OPENCV_EXTRA_SHARED_LINKER_FLAGS_RELEASE} /debug") set(OPENCV_EXTRA_MODULE_LINKER_FLAGS_RELEASE "${OPENCV_EXTRA_MODULE_LINKER_FLAGS_RELEASE} /debug") endif() # Remove unreferenced functions: function level linking set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /Gy") if(NOT MSVC_VERSION LESS 1400) set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /bigobj") endif() if(OPENCV_WARNINGS_ARE_ERRORS) set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /WX") endif() if(ENABLE_LTO) set(OPENCV_EXTRA_FLAGS_RELEASE "${OPENCV_EXTRA_FLAGS_RELEASE} /GL") set(OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE "${OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE} /LTCG") endif() if(NOT MSVC_VERSION LESS 1800 AND NOT CMAKE_GENERATOR MATCHES "Visual Studio") set(OPENCV_EXTRA_C_FLAGS "${OPENCV_EXTRA_C_FLAGS} /FS") set(OPENCV_EXTRA_CXX_FLAGS "${OPENCV_EXTRA_CXX_FLAGS} /FS") endif() endif() include(cmake/OpenCVCompilerOptimizations.cmake) if(COMMAND ocv_compiler_optimization_options) ocv_compiler_optimization_options() endif() if(COMMAND ocv_compiler_optimization_options_finalize) ocv_compiler_optimization_options_finalize() endif() # set default visibility to hidden if((CV_GCC OR CV_CLANG) AND NOT MSVC AND NOT OPENCV_SKIP_VISIBILITY_HIDDEN AND NOT " ${CMAKE_CXX_FLAGS} ${OPENCV_EXTRA_FLAGS} ${OPENCV_EXTRA_CXX_FLAGS}" MATCHES " -fvisibility") add_extra_compiler_option(-fvisibility=hidden) add_extra_compiler_option(-fvisibility-inlines-hidden) endif() # workaround gcc bug for aligned ld/st # https://github.com/opencv/opencv/issues/13211 if((PPC64LE AND NOT CMAKE_CROSSCOMPILING) OR OPENCV_FORCE_COMPILER_CHECK_VSX_ALIGNED) ocv_check_runtime_flag("${CPU_BASELINE_FLAGS}" OPENCV_CHECK_VSX_ALIGNED "${OpenCV_SOURCE_DIR}/cmake/checks/runtime/cpu_vsx_aligned.cpp") if(NOT OPENCV_CHECK_VSX_ALIGNED) add_extra_compiler_option_force(-DCV_COMPILER_VSX_BROKEN_ALIGNED) endif() endif() # validate inline asm with fixes register number and constraints wa, wd, wf if(PPC64LE) ocv_check_compiler_flag(CXX "${CPU_BASELINE_FLAGS}" OPENCV_CHECK_VSX_ASM "${OpenCV_SOURCE_DIR}/cmake/checks/cpu_vsx_asm.cpp") if(NOT OPENCV_CHECK_VSX_ASM) add_extra_compiler_option_force(-DCV_COMPILER_VSX_BROKEN_ASM) endif() endif() # Apply "-Wl,--as-needed" linker flags: https://github.com/opencv/opencv/issues/7001 if(NOT OPENCV_SKIP_LINK_AS_NEEDED) if(UNIX AND (NOT APPLE OR NOT CMAKE_VERSION VERSION_LESS "3.2")) set(_option "-Wl,--as-needed") set(_saved_CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}") set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${_option}") # requires CMake 3.2+ and CMP0056 ocv_check_compiler_flag(CXX "" HAVE_LINK_AS_NEEDED) set(CMAKE_EXE_LINKER_FLAGS "${_saved_CMAKE_EXE_LINKER_FLAGS}") if(HAVE_LINK_AS_NEEDED) set(OPENCV_EXTRA_EXE_LINKER_FLAGS "${OPENCV_EXTRA_EXE_LINKER_FLAGS} ${_option}") set(OPENCV_EXTRA_SHARED_LINKER_FLAGS "${OPENCV_EXTRA_SHARED_LINKER_FLAGS} ${_option}") set(OPENCV_EXTRA_MODULE_LINKER_FLAGS "${OPENCV_EXTRA_MODULE_LINKER_FLAGS} ${_option}") endif() endif() endif() # Apply "-Wl,--no-undefined" linker flags: https://github.com/opencv/opencv/pull/21347 if(NOT OPENCV_SKIP_LINK_NO_UNDEFINED) if(UNIX AND (NOT APPLE OR NOT CMAKE_VERSION VERSION_LESS "3.2")) set(_option "-Wl,--no-undefined") set(_saved_CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}") set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${_option}") # requires CMake 3.2+ and CMP0056 ocv_check_compiler_flag(CXX "" HAVE_LINK_NO_UNDEFINED) set(CMAKE_EXE_LINKER_FLAGS "${_saved_CMAKE_EXE_LINKER_FLAGS}") if(HAVE_LINK_NO_UNDEFINED) set(OPENCV_EXTRA_EXE_LINKER_FLAGS "${OPENCV_EXTRA_EXE_LINKER_FLAGS} ${_option}") set(OPENCV_EXTRA_SHARED_LINKER_FLAGS "${OPENCV_EXTRA_SHARED_LINKER_FLAGS} ${_option}") set(OPENCV_EXTRA_MODULE_LINKER_FLAGS "${OPENCV_EXTRA_MODULE_LINKER_FLAGS} ${_option}") endif() endif() endif() # combine all "extra" options if(NOT OPENCV_SKIP_EXTRA_COMPILER_FLAGS) set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OPENCV_EXTRA_FLAGS} ${OPENCV_EXTRA_C_FLAGS}") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OPENCV_EXTRA_FLAGS} ${OPENCV_EXTRA_CXX_FLAGS}") set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${OPENCV_EXTRA_FLAGS_RELEASE}") set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${OPENCV_EXTRA_FLAGS_RELEASE}") set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${OPENCV_EXTRA_FLAGS_DEBUG}") set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${OPENCV_EXTRA_FLAGS_DEBUG}") set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${OPENCV_EXTRA_EXE_LINKER_FLAGS}") set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} ${OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE}") set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} ${OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG}") set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${OPENCV_EXTRA_SHARED_LINKER_FLAGS}") set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} ${OPENCV_EXTRA_SHARED_LINKER_FLAGS_RELEASE}") set(CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_SHARED_LINKER_FLAGS_DEBUG} ${OPENCV_EXTRA_SHARED_LINKER_FLAGS_DEBUG}") set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${OPENCV_EXTRA_MODULE_LINKER_FLAGS}") set(CMAKE_MODULE_LINKER_FLAGS_RELEASE "${CMAKE_MODULE_LINKER_FLAGS_RELEASE} ${OPENCV_EXTRA_MODULE_LINKER_FLAGS_RELEASE}") set(CMAKE_MODULE_LINKER_FLAGS_DEBUG "${CMAKE_MODULE_LINKER_FLAGS_DEBUG} ${OPENCV_EXTRA_MODULE_LINKER_FLAGS_DEBUG}") endif() if(MSVC) if(NOT ENABLE_NOISY_WARNINGS) if(MSVC_VERSION EQUAL 1400) ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4510 /wd4610 /wd4312 /wd4201 /wd4244 /wd4328 /wd4267) endif() endif() foreach(flags CMAKE_C_FLAGS CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_RELEASE CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG) string(REPLACE "/Zm1000" "" ${flags} "${${flags}}") endforeach() # Enable 'extern "C"' and asynchronous (division by zero, access violation) exceptions if(NOT OPENCV_SKIP_MSVC_EXCEPTIONS_FLAG) foreach(flags CMAKE_C_FLAGS CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_RELEASE CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG) string(REGEX REPLACE " /EH[^ ]* " " " ${flags} " ${${flags}}") endforeach() if(NOT " ${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_RELEASE} ${CMAKE_CXX_FLAGS_DEBUG}" MATCHES " /EH") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHa") endif() endif() # Enable [[attribute]] syntax checking to prevent silent failure: "attribute is ignored in this syntactic position" add_extra_compiler_option("/w15240") if(NOT ENABLE_NOISY_WARNINGS) ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4127) # conditional expression is constant ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4251) # class 'std::XXX' needs to have dll-interface to be used by clients of YYY ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4324) # 'struct_name' : structure was padded due to __declspec(align()) ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4275) # non dll-interface class 'std::exception' used as base for dll-interface class 'cv::Exception' ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4512) # Assignment operator could not be generated ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4589) # Constructor of abstract class 'cv::ORB' ignores initializer for virtual base class 'cv::Algorithm' ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4819) # Symbols like delta or epsilon cannot be represented endif() if(CV_ICC AND NOT ENABLE_NOISY_WARNINGS) foreach(flags CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG CMAKE_C_FLAGS CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_DEBUG) string(REGEX REPLACE "( |^)/W[0-9]+( |$)" "\\1\\2" ${flags} "${${flags}}") endforeach() set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /Qwd673") # PCH warning endif() endif() if(APPLE AND NOT CMAKE_CROSSCOMPILING AND NOT DEFINED ENV{LDFLAGS} AND EXISTS "/usr/local/lib") link_directories("/usr/local/lib") endif() if(ENABLE_BUILD_HARDENING) include(${CMAKE_CURRENT_LIST_DIR}/OpenCVCompilerDefenses.cmake) endif() if(MSVC) include(cmake/OpenCVCRTLinkage.cmake) add_definitions(-D_VARIADIC_MAX=10) endif() if(CMAKE_SYSTEM_NAME STREQUAL "Windows") get_directory_property(__DIRECTORY_COMPILE_DEFINITIONS COMPILE_DEFINITIONS) if((NOT " ${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_RELEASE} ${OPENCV_EXTRA_CXX_FLAGS} ${OPENCV_EXTRA_FLAGS_RELEASE} ${__DIRECTORY_COMPILE_DEFINITIONS}" MATCHES "_WIN32_WINNT" AND NOT OPENCV_CMAKE_SKIP_MACRO_WIN32_WINNT) OR OPENCV_CMAKE_FORCE_MACRO_WIN32_WINNT ) # https://docs.microsoft.com/en-us/cpp/porting/modifying-winver-and-win32-winnt # Target Windows 7 API set(OPENCV_CMAKE_MACRO_WIN32_WINNT "0x0601" CACHE STRING "Value of _WIN32_WINNT macro") add_definitions(-D_WIN32_WINNT=${OPENCV_CMAKE_MACRO_WIN32_WINNT}) endif() endif() # Enable compiler options for OpenCV modules/apps/samples only (ignore 3rdparty) macro(ocv_add_modules_compiler_options) if(MSVC AND NOT OPENCV_SKIP_MSVC_W4_OPTION) foreach(flags CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG) string(REPLACE "/W3" "/W4" ${flags} "${${flags}}") endforeach() endif() if(OPENCV_ENABLE_MEMORY_SANITIZER) add_definitions(-DOPENCV_ENABLE_MEMORY_SANITIZER=1) endif() endmacro() # adjust -Wl,-rpath-link if(CMAKE_SKIP_RPATH) if((NOT CMAKE_CROSSCOMPILING OR OPENCV_ENABLE_LINKER_RPATH_LINK_ORIGIN) AND NOT OPENCV_SKIP_LINKER_RPATH_LINK_ORIGIN) if(DEFINED CMAKE_SHARED_LIBRARY_RPATH_ORIGIN_TOKEN) list(APPEND CMAKE_PLATFORM_RUNTIME_PATH "${CMAKE_SHARED_LIBRARY_RPATH_ORIGIN_TOKEN}") else() list(APPEND CMAKE_PLATFORM_RUNTIME_PATH "\$ORIGIN") endif() elseif(NOT OPENCV_SKIP_LINKER_RPATH_LINK_BINARY_LIB) list(APPEND CMAKE_PLATFORM_RUNTIME_PATH "${LIBRARY_OUTPUT_PATH}") endif() endif() if(OPENCV_EXTRA_RPATH_LINK_PATH) string(REPLACE ":" ";" OPENCV_EXTRA_RPATH_LINK_PATH_ "${OPENCV_EXTRA_RPATH_LINK_PATH}") list(APPEND CMAKE_PLATFORM_RUNTIME_PATH ${OPENCV_EXTRA_RPATH_LINK_PATH_}) if(NOT CMAKE_EXECUTABLE_RPATH_LINK_CXX_FLAG) message(WARNING "OPENCV_EXTRA_RPATH_LINK_PATH may not work properly because CMAKE_EXECUTABLE_RPATH_LINK_CXX_FLAG is not defined (not supported)") endif() endif() # Control MSVC /MP flag # Input variables: OPENCV_MSVC_PARALLEL (ON,1,2,3,...) + OPENCV_SKIP_MSVC_PARALLEL # Details: # - https://docs.microsoft.com/en-us/cpp/build/reference/mp-build-with-multiple-processes # - https://docs.microsoft.com/en-us/cpp/build/reference/cl-environment-variables # - https://gitlab.kitware.com/cmake/cmake/merge_requests/1718/diffs if(CMAKE_GENERATOR MATCHES "Visual Studio" AND CMAKE_CXX_COMPILER_ID MATCHES "MSVC|Intel") ocv_check_environment_variables(OPENCV_SKIP_MSVC_PARALLEL) if(OPENCV_SKIP_MSVC_PARALLEL) # nothing elseif(" ${CMAKE_CXX_FLAGS}" MATCHES "/MP") # nothing, already defined in compiler flags elseif(DEFINED ENV{CL} AND " $ENV{CL}" MATCHES "/MP") # nothing, compiler will use CL environment variable elseif(DEFINED ENV{_CL_} AND " $ENV{_CL_}" MATCHES "/MP") # nothing, compiler will use _CL_ environment variable else() ocv_check_environment_variables(OPENCV_MSVC_PARALLEL) set(_mp_value "ON") if(DEFINED OPENCV_MSVC_PARALLEL) set(_mp_value "${OPENCV_MSVC_PARALLEL}") endif() set(OPENCV_MSVC_PARALLEL "${_mp_value}" CACHE STRING "Control MSVC /MP flag") if(_mp_value) if(_mp_value GREATER 0) set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /MP${_mp_value}") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP${_mp_value}") else() set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /MP") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /MP") endif() endif() endif() endif()