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14b76a5bca
opencv/cmake/OpenCVCompilerOptions.cmake
Tomoaki Teshima 14b76a5bca suppress warnings on Visual Studio 2013 and earlier
2017-08-10 23:03:27 +09:00

348 lines
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CMake
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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(MINGW OR (X86 AND UNIX AND NOT APPLE))
# mingw compiler is known to produce unstable SSE code with -O3 hence we are trying to use -O2 instead
if(CMAKE_COMPILER_IS_GNUCXX)
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(REPLACE "-O3" "-O2" ${flags} "${${flags}}")
endforeach()
endif()
endif()
if(MSVC)
string(STRIP "${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)
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)
else()
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" "" ${flags} "${${flags}}")
endforeach()
elseif(NOT ((IOS OR ANDROID) AND NOT BUILD_SHARED_LIBS))
# Remove unreferenced functions: function level linking
add_extra_compiler_option(-ffunction-sections)
endif()
if(ENABLE_COVERAGE)
set(OPENCV_EXTRA_C_FLAGS "${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 "${OPENCV_EXTRA_CXX_FLAGS} --std=c++11")
set(WITH_VTK OFF) # There are issues with VTK 6.0
endif()
set(OPENCV_EXTRA_FLAGS_RELEASE "${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()
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()
# Extra link libs if the user selects building static libs:
if(NOT BUILD_SHARED_LIBS AND CMAKE_COMPILER_IS_GNUCXX AND NOT ANDROID)
# Android does not need these settings because they are already set by toolchain file
if(NOT MINGW)
set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} stdc++)
endif()
set(OPENCV_EXTRA_FLAGS "-fPIC ${OPENCV_EXTRA_FLAGS}")
endif()
include(cmake/OpenCVCompilerOptimizations.cmake)
if(COMMAND ocv_compiler_optimization_options)
ocv_compiler_optimization_options()
endif()
if(COMMAND ocv_compiler_optimization_options_finalize)
ocv_compiler_optimization_options_finalize()
endif()
# Add user supplied extra options (optimization, etc...)
# ==========================================================
set(OPENCV_EXTRA_FLAGS "${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 "${OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG}" CACHE INTERNAL "Extra linker flags for Debug build")
# set default visibility to hidden
if(CMAKE_COMPILER_IS_GNUCXX AND CMAKE_OPENCV_GCC_VERSION_NUM GREATER 399)
add_extra_compiler_option(-fvisibility=hidden)
add_extra_compiler_option(-fvisibility-inlines-hidden)
endif()
#combine all "extra" options
set(CMAKE_C_FLAGS "${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()
if(MSVC_VERSION LESS 1900) # MSVS2015
ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4127) # warning C4127: conditional expression is constant
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" "" ${flags} "${${flags}}")
endforeach()
if(NOT ENABLE_NOISY_WARNINGS)
ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4251) # class 'std::XXX' needs to have dll-interface to be used by clients of YYY
ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4324) # 'struct_name' : structure was padded due to __declspec(align())
ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4275) # non dll-interface class 'std::exception' used as base for dll-interface class 'cv::Exception'
ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4512) # Assignment operator could not be generated
ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4589) # Constructor of abstract class 'cv::ORB' ignores initializer for virtual base class 'cv::Algorithm'
endif()
if(CV_ICC AND NOT ENABLE_NOISY_WARNINGS)
foreach(flags CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG CMAKE_C_FLAGS CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_DEBUG)
string(REGEX REPLACE "( |^)/W[0-9]+( |$)" "\\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()
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