if(ENABLE_CCACHE AND NOT CMAKE_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 (${CCACHE_PROGRAM})") get_property(__OLD_RULE_LAUNCH_COMPILE GLOBAL PROPERTY RULE_LAUNCH_COMPILE) if(__OLD_RULE_LAUNCH_COMPILE) message(STATUS "Can't replace CMake compiler launcher") else() set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${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(CMAKE_COMPILER_IS_CCACHE 1) else() message(STATUS "Unable to compile program with enabled ccache, reverting...") set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${__OLD_RULE_LAUNCH_COMPILE}") endif() endif() else() message(STATUS "Looking for ccache - not found") endif() endif() if((CMAKE_COMPILER_IS_CLANGCXX OR CMAKE_COMPILER_IS_CLANGCC OR CMAKE_COMPILER_IS_CCACHE) AND NOT CMAKE_GENERATOR MATCHES "Xcode") set(ENABLE_PRECOMPILED_HEADERS OFF CACHE BOOL "" FORCE) endif() if(MSVC) string(STRIP "${CMAKE_CXX_FLAGS}" CMAKE_CXX_FLAGS) string(STRIP "${CMAKE_CXX_FLAGS_INIT}" CMAKE_CXX_FLAGS_INIT) if(CMAKE_CXX_FLAGS STREQUAL CMAKE_CXX_FLAGS_INIT) # override cmake default exception handling option string(REPLACE "/EHsc" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHa") set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" CACHE STRING "Flags used by the compiler during all build types." FORCE) endif() endif() set(OPENCV_EXTRA_FLAGS "") set(OPENCV_EXTRA_C_FLAGS "") set(OPENCV_EXTRA_CXX_FLAGS "") set(OPENCV_EXTRA_FLAGS_RELEASE "") set(OPENCV_EXTRA_FLAGS_DEBUG "") set(OPENCV_EXTRA_EXE_LINKER_FLAGS "") set(OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE "") set(OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG "") 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() # OpenCV fails some tests when 'char' is 'unsigned' by default add_extra_compiler_option(-fsigned-char) if(MINGW) # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40838 # here we are trying to workaround the problem add_extra_compiler_option(-mstackrealign) if(NOT HAVE_CXX_MSTACKREALIGN) add_extra_compiler_option(-mpreferred-stack-boundary=2) endif() endif() if(CV_ICC AND NOT ENABLE_FAST_MATH) if(MSVC) add_extra_compiler_option("/fp:precise") else() add_extra_compiler_option("-fp-model precise") endif() endif() if(CMAKE_COMPILER_IS_GNUCXX) # High level of warnings. add_extra_compiler_option(-W) add_extra_compiler_option(-Wall) add_extra_compiler_option(-Werror=return-type) add_extra_compiler_option(-Werror=non-virtual-dtor) add_extra_compiler_option(-Werror=address) add_extra_compiler_option(-Werror=sequence-point) add_extra_compiler_option(-Wformat) add_extra_compiler_option(-Werror=format-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) add_extra_compiler_option(-Winit-self) if(ENABLE_NOISY_WARNINGS) add_extra_compiler_option(-Wcast-align) add_extra_compiler_option(-Wstrict-aliasing=2) else() add_extra_compiler_option(-Wno-narrowing) add_extra_compiler_option(-Wno-delete-non-virtual-dtor) add_extra_compiler_option(-Wno-unnamed-type-template-args) add_extra_compiler_option(-Wno-comment) add_extra_compiler_option(-Wno-implicit-fallthrough) if(CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_VERSION VERSION_EQUAL 7.2.0) add_extra_compiler_option(-Wno-strict-overflow) # Issue is fixed in GCC 7.2.1 endif() endif() add_extra_compiler_option(-fdiagnostics-show-option) # The -Wno-long-long is required in 64bit systems when including sytem 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 CMAKE_COMPILER_IS_CLANGCXX)) # TODO add_extra_compiler_option(-pthread) endif() if(CMAKE_COMPILER_IS_CLANGCXX) add_extra_compiler_option(-Qunused-arguments) endif() if(OPENCV_WARNINGS_ARE_ERRORS) add_extra_compiler_option(-Werror) endif() if(X86 AND NOT MINGW64 AND NOT X86_64 AND NOT APPLE) add_extra_compiler_option(-march=i686) 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() if(ENABLE_FAST_MATH) add_extra_compiler_option(-ffast-math) endif() # Profiling? if(ENABLE_PROFILING) add_extra_compiler_option("-pg -g") # 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" "" ${flags} "${${flags}}") endforeach() elseif(NOT ((IOS OR ANDROID) AND NOT BUILD_SHARED_LIBS)) # Remove unreferenced functions: function level linking add_extra_compiler_option(-ffunction-sections) add_extra_compiler_option(-fdata-sections) if(NOT APPLE AND NOT OPENCV_SKIP_GC_SECTIONS) set(OPENCV_EXTRA_EXE_LINKER_FLAGS "${OPENCV_EXTRA_EXE_LINKER_FLAGS} -Wl,--gc-sections") 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 "${CMAKE_EXE_LINKER_FLAGS} --coverage") endif() if(ENABLE_INSTRUMENTATION) set(OPENCV_EXTRA_CXX_FLAGS "${OPENCV_EXTRA_CXX_FLAGS} --std=c++11") set(WITH_VTK OFF) # There are issues with VTK 6.0 endif() if(ENABLE_LTO) add_extra_compiler_option(-flto) endif() set(OPENCV_EXTRA_FLAGS_RELEASE "${OPENCV_EXTRA_FLAGS_RELEASE} -DNDEBUG") if(NOT " ${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_DEBUG} " MATCHES "-O") set(OPENCV_EXTRA_FLAGS_DEBUG "${OPENCV_EXTRA_FLAGS_DEBUG} -O0") endif() set(OPENCV_EXTRA_FLAGS_DEBUG "${OPENCV_EXTRA_FLAGS_DEBUG} -DDEBUG -D_DEBUG") endif() if(MSVC) #TODO Code refactoring is required to resolve security warnings #if(NOT ENABLE_BUILD_HARDENING) set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS") #endif() # 64-bit portability warnings, in MSVC80 if(MSVC80) set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /Wp64") endif() if(BUILD_WITH_DEBUG_INFO) set(OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE "${OPENCV_EXTRA_EXE_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(BUILD_WITH_DEBUG_INFO) set(OPENCV_EXTRA_FLAGS_RELEASE "${OPENCV_EXTRA_FLAGS_RELEASE} /Zi") endif() if(OPENCV_WARNINGS_ARE_ERRORS) set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /WX") endif() if(ENABLE_LTO) set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /GL") set(OPENCV_EXTRA_EXE_LINKER_FLAGS "${OPENCV_EXTRA_EXE_LINKER_FLAGS} /LTCG") endif() endif() if(MSVC12 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() # Adding additional using directory for WindowsPhone 8.0 to get Windows.winmd properly if(WINRT_PHONE AND WINRT_8_0) set(OPENCV_EXTRA_CXX_FLAGS "${OPENCV_EXTRA_CXX_FLAGS} /AI\$(WindowsSDK_MetadataPath)") endif() include(cmake/OpenCVCompilerOptimizations.cmake) if(COMMAND ocv_compiler_optimization_options) ocv_compiler_optimization_options() endif() if(COMMAND ocv_compiler_optimization_options_finalize) ocv_compiler_optimization_options_finalize() endif() # Add user supplied extra options (optimization, etc...) # ========================================================== set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS}" CACHE INTERNAL "Extra compiler options") set(OPENCV_EXTRA_C_FLAGS "${OPENCV_EXTRA_C_FLAGS}" CACHE INTERNAL "Extra compiler options for C sources") set(OPENCV_EXTRA_CXX_FLAGS "${OPENCV_EXTRA_CXX_FLAGS}" CACHE INTERNAL "Extra compiler options for C++ sources") set(OPENCV_EXTRA_FLAGS_RELEASE "${OPENCV_EXTRA_FLAGS_RELEASE}" CACHE INTERNAL "Extra compiler options for Release build") set(OPENCV_EXTRA_FLAGS_DEBUG "${OPENCV_EXTRA_FLAGS_DEBUG}" CACHE INTERNAL "Extra compiler options for Debug build") set(OPENCV_EXTRA_EXE_LINKER_FLAGS "${OPENCV_EXTRA_EXE_LINKER_FLAGS}" CACHE INTERNAL "Extra linker flags") set(OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE "${OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE}" CACHE INTERNAL "Extra linker flags for Release build") set(OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG "${OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG}" CACHE INTERNAL "Extra linker flags for Debug build") # set default visibility to hidden if((CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang") AND NOT OPENCV_SKIP_VISIBILITY_HIDDEN AND NOT CMAKE_CXX_FLAGS MATCHES "-fvisibility") add_extra_compiler_option(-fvisibility=hidden) add_extra_compiler_option(-fvisibility-inlines-hidden) endif() #combine all "extra" options set(CMAKE_C_FLAGS "${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} ${OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG}") if(MSVC) # avoid warnings from MSVC about overriding the /W* option # we replace /W3 with /W4 only for C++ files, # since all the 3rd-party libraries OpenCV uses are in C, # and we do not care about their warnings. string(REPLACE "/W3" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") string(REPLACE "/W3" "/W4" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}") string(REPLACE "/W3" "/W4" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}") 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() # allow extern "C" functions throw exceptions 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 "/EHsc-" "/EHs" ${flags} "${${flags}}") string(REPLACE "/EHsc" "/EHs" ${flags} "${${flags}}") string(REPLACE "/Zm1000" "" ${flags} "${${flags}}") endforeach() if(NOT ENABLE_NOISY_WARNINGS) ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4127) # conditional expression is constant ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4251) # class 'std::XXX' needs to have dll-interface to be used by clients of YYY ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4324) # 'struct_name' : structure was padded due to __declspec(align()) ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4275) # non dll-interface class 'std::exception' used as base for dll-interface class 'cv::Exception' ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4512) # Assignment operator could not be generated ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4589) # Constructor of abstract class 'cv::ORB' ignores initializer for virtual base class 'cv::Algorithm' endif() if(CV_ICC AND NOT ENABLE_NOISY_WARNINGS) foreach(flags CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG CMAKE_C_FLAGS CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_DEBUG) string(REGEX REPLACE "( |^)/W[0-9]+( |$)" "\\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()