mirror of
https://github.com/opencv/opencv.git
synced 2024-11-25 19:50:38 +08:00
324 lines
12 KiB
CMake
324 lines
12 KiB
CMake
if(MINGW OR (X86 AND UNIX AND NOT APPLE))
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# mingw compiler is known to produce unstable SSE code with -O3 hence we are trying to use -O2 instead
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if(CMAKE_COMPILER_IS_GNUCXX)
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foreach(flags CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG)
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string(REPLACE "-O3" "-O2" ${flags} "${${flags}}")
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endforeach()
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endif()
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if(CMAKE_COMPILER_IS_GNUCC)
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foreach(flags CMAKE_C_FLAGS CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_DEBUG)
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string(REPLACE "-O3" "-O2" ${flags} "${${flags}}")
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endforeach()
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endif()
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endif()
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if(MSVC)
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string(REGEX REPLACE "^ *| * $" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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string(REGEX REPLACE "^ *| * $" "" CMAKE_CXX_FLAGS_INIT "${CMAKE_CXX_FLAGS_INIT}")
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if(CMAKE_CXX_FLAGS STREQUAL CMAKE_CXX_FLAGS_INIT)
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# override cmake default exception handling option
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string(REPLACE "/EHsc" "/EHa" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" CACHE STRING "Flags used by the compiler during all build types." FORCE)
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endif()
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endif()
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set(OPENCV_EXTRA_FLAGS "")
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set(OPENCV_EXTRA_C_FLAGS "")
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set(OPENCV_EXTRA_CXX_FLAGS "")
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set(OPENCV_EXTRA_FLAGS_RELEASE "")
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set(OPENCV_EXTRA_FLAGS_DEBUG "")
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set(OPENCV_EXTRA_EXE_LINKER_FLAGS "")
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set(OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE "")
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set(OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG "")
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macro(add_extra_compiler_option option)
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if(CMAKE_BUILD_TYPE)
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set(CMAKE_TRY_COMPILE_CONFIGURATION ${CMAKE_BUILD_TYPE})
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endif()
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ocv_check_flag_support(CXX "${option}" _varname "${OPENCV_EXTRA_CXX_FLAGS} ${ARGN}")
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if(${_varname})
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set(OPENCV_EXTRA_CXX_FLAGS "${OPENCV_EXTRA_CXX_FLAGS} ${option}")
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endif()
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ocv_check_flag_support(C "${option}" _varname "${OPENCV_EXTRA_C_FLAGS} ${ARGN}")
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if(${_varname})
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set(OPENCV_EXTRA_C_FLAGS "${OPENCV_EXTRA_C_FLAGS} ${option}")
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endif()
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endmacro()
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# OpenCV fails some tests when 'char' is 'unsigned' by default
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add_extra_compiler_option(-fsigned-char)
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if(MINGW)
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# http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40838
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# here we are trying to workaround the problem
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add_extra_compiler_option(-mstackrealign)
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if(NOT HAVE_CXX_MSTACKREALIGN)
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add_extra_compiler_option(-mpreferred-stack-boundary=2)
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endif()
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endif()
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if(CMAKE_COMPILER_IS_GNUCXX)
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# High level of warnings.
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add_extra_compiler_option(-W)
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add_extra_compiler_option(-Wall)
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add_extra_compiler_option(-Werror=return-type)
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add_extra_compiler_option(-Werror=non-virtual-dtor)
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add_extra_compiler_option(-Werror=address)
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add_extra_compiler_option(-Werror=sequence-point)
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add_extra_compiler_option(-Wformat)
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add_extra_compiler_option(-Werror=format-security -Wformat)
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add_extra_compiler_option(-Wmissing-declarations)
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add_extra_compiler_option(-Wmissing-prototypes)
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add_extra_compiler_option(-Wstrict-prototypes)
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add_extra_compiler_option(-Wundef)
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add_extra_compiler_option(-Winit-self)
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add_extra_compiler_option(-Wpointer-arith)
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add_extra_compiler_option(-Wshadow)
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add_extra_compiler_option(-Wsign-promo)
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if(ENABLE_NOISY_WARNINGS)
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add_extra_compiler_option(-Wcast-align)
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add_extra_compiler_option(-Wstrict-aliasing=2)
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else()
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add_extra_compiler_option(-Wno-narrowing)
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add_extra_compiler_option(-Wno-delete-non-virtual-dtor)
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add_extra_compiler_option(-Wno-unnamed-type-template-args)
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endif()
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add_extra_compiler_option(-fdiagnostics-show-option)
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# The -Wno-long-long is required in 64bit systems when including sytem headers.
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if(X86_64)
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add_extra_compiler_option(-Wno-long-long)
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endif()
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# We need pthread's
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if(UNIX AND NOT ANDROID AND NOT (APPLE AND CMAKE_COMPILER_IS_CLANGCXX))
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add_extra_compiler_option(-pthread)
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endif()
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if(OPENCV_WARNINGS_ARE_ERRORS)
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add_extra_compiler_option(-Werror)
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endif()
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if(X86 AND NOT MINGW64 AND NOT X86_64 AND NOT APPLE)
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add_extra_compiler_option(-march=i686)
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endif()
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if(APPLE)
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add_extra_compiler_option(-Wno-semicolon-before-method-body)
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endif()
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# Other optimizations
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if(ENABLE_OMIT_FRAME_POINTER)
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add_extra_compiler_option(-fomit-frame-pointer)
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else()
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add_extra_compiler_option(-fno-omit-frame-pointer)
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endif()
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if(ENABLE_FAST_MATH)
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add_extra_compiler_option(-ffast-math)
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endif()
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if(ENABLE_POWERPC)
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add_extra_compiler_option("-mcpu=G3 -mtune=G5")
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endif()
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if(ENABLE_POPCNT)
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add_extra_compiler_option(-mpopcnt)
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endif()
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if(ENABLE_SSE)
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add_extra_compiler_option(-msse)
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endif()
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if(ENABLE_SSE2)
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add_extra_compiler_option(-msse2)
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endif()
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if(ENABLE_NEON)
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add_extra_compiler_option("-mfpu=neon")
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endif()
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if(ENABLE_VFPV3 AND NOT ENABLE_NEON)
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add_extra_compiler_option("-mfpu=vfpv3")
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endif()
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# SSE3 and further should be disabled under MingW because it generates compiler errors
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if(NOT MINGW)
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if(ENABLE_AVX)
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add_extra_compiler_option(-mavx)
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endif()
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if(ENABLE_AVX2)
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add_extra_compiler_option(-mavx2)
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if(ENABLE_FMA3)
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add_extra_compiler_option(-mfma)
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endif()
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endif()
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# GCC depresses SSEx instructions when -mavx is used. Instead, it generates new AVX instructions or AVX equivalence for all SSEx instructions when needed.
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if(NOT OPENCV_EXTRA_CXX_FLAGS MATCHES "-mavx")
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if(ENABLE_SSE3)
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add_extra_compiler_option(-msse3)
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endif()
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if(ENABLE_SSSE3)
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add_extra_compiler_option(-mssse3)
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endif()
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if(ENABLE_SSE41)
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add_extra_compiler_option(-msse4.1)
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endif()
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if(ENABLE_SSE42)
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add_extra_compiler_option(-msse4.2)
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endif()
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endif()
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endif(NOT MINGW)
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if(X86 OR X86_64)
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if(NOT APPLE AND CMAKE_SIZEOF_VOID_P EQUAL 4)
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if(OPENCV_EXTRA_CXX_FLAGS MATCHES "-m(sse2|avx)")
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add_extra_compiler_option(-mfpmath=sse)# !! important - be on the same wave with x64 compilers
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else()
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add_extra_compiler_option(-mfpmath=387)
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endif()
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endif()
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endif()
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# Profiling?
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if(ENABLE_PROFILING)
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add_extra_compiler_option("-pg -g")
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# turn off incompatible options
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foreach(flags CMAKE_CXX_FLAGS CMAKE_C_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_C_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG CMAKE_C_FLAGS_DEBUG
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OPENCV_EXTRA_FLAGS_RELEASE OPENCV_EXTRA_FLAGS_DEBUG OPENCV_EXTRA_C_FLAGS OPENCV_EXTRA_CXX_FLAGS)
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string(REPLACE "-fomit-frame-pointer" "" ${flags} "${${flags}}")
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string(REPLACE "-ffunction-sections" "" ${flags} "${${flags}}")
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endforeach()
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elseif(NOT APPLE AND NOT ANDROID)
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# Remove unreferenced functions: function level linking
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add_extra_compiler_option(-ffunction-sections)
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endif()
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if(ENABLE_COVERAGE)
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set(OPENCV_EXTRA_C_FLAGS "${OPENCV_EXTRA_C_FLAGS} --coverage")
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set(OPENCV_EXTRA_CXX_FLAGS "${OPENCV_EXTRA_CXX_FLAGS} --coverage")
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endif()
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set(OPENCV_EXTRA_FLAGS_RELEASE "${OPENCV_EXTRA_FLAGS_RELEASE} -DNDEBUG")
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set(OPENCV_EXTRA_FLAGS_DEBUG "${OPENCV_EXTRA_FLAGS_DEBUG} -O0 -DDEBUG -D_DEBUG")
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endif()
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if(MSVC)
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set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS")
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# 64-bit portability warnings, in MSVC80
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if(MSVC80)
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set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /Wp64")
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endif()
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if(BUILD_WITH_DEBUG_INFO)
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set(OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE "${OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE} /debug")
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endif()
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# Remove unreferenced functions: function level linking
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set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /Gy")
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if(NOT MSVC_VERSION LESS 1400)
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set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /bigobj")
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endif()
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if(BUILD_WITH_DEBUG_INFO)
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set(OPENCV_EXTRA_FLAGS_RELEASE "${OPENCV_EXTRA_FLAGS_RELEASE} /Zi")
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endif()
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if(ENABLE_AVX AND NOT MSVC_VERSION LESS 1600)
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set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /arch:AVX")
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endif()
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if(ENABLE_SSE4_1 AND CV_ICC AND NOT OPENCV_EXTRA_FLAGS MATCHES "/arch:")
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set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /arch:SSE4.1")
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endif()
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if(ENABLE_SSE3 AND CV_ICC AND NOT OPENCV_EXTRA_FLAGS MATCHES "/arch:")
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set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /arch:SSE3")
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endif()
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if(NOT MSVC64)
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# 64-bit MSVC compiler uses SSE/SSE2 by default
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if(ENABLE_SSE2 AND NOT OPENCV_EXTRA_FLAGS MATCHES "/arch:")
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set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /arch:SSE2")
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endif()
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if(ENABLE_SSE AND NOT OPENCV_EXTRA_FLAGS MATCHES "/arch:")
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set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /arch:SSE")
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endif()
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endif()
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if(ENABLE_SSE OR ENABLE_SSE2 OR ENABLE_SSE3 OR ENABLE_SSE4_1 OR ENABLE_AVX)
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set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /Oi")
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endif()
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if(X86 OR X86_64)
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if(CMAKE_SIZEOF_VOID_P EQUAL 4 AND ENABLE_SSE2)
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set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /fp:fast") # !! important - be on the same wave with x64 compilers
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endif()
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endif()
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if(OPENCV_WARNINGS_ARE_ERRORS)
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set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS} /WX")
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endif()
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endif()
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# Extra link libs if the user selects building static libs:
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if(NOT BUILD_SHARED_LIBS AND CMAKE_COMPILER_IS_GNUCXX AND NOT ANDROID)
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# Android does not need these settings because they are already set by toolchain file
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set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} stdc++)
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set(OPENCV_EXTRA_FLAGS "-fPIC ${OPENCV_EXTRA_FLAGS}")
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endif()
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# Add user supplied extra options (optimization, etc...)
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# ==========================================================
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set(OPENCV_EXTRA_FLAGS "${OPENCV_EXTRA_FLAGS}" CACHE INTERNAL "Extra compiler options")
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set(OPENCV_EXTRA_C_FLAGS "${OPENCV_EXTRA_C_FLAGS}" CACHE INTERNAL "Extra compiler options for C sources")
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set(OPENCV_EXTRA_CXX_FLAGS "${OPENCV_EXTRA_CXX_FLAGS}" CACHE INTERNAL "Extra compiler options for C++ sources")
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set(OPENCV_EXTRA_FLAGS_RELEASE "${OPENCV_EXTRA_FLAGS_RELEASE}" CACHE INTERNAL "Extra compiler options for Release build")
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set(OPENCV_EXTRA_FLAGS_DEBUG "${OPENCV_EXTRA_FLAGS_DEBUG}" CACHE INTERNAL "Extra compiler options for Debug build")
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set(OPENCV_EXTRA_EXE_LINKER_FLAGS "${OPENCV_EXTRA_EXE_LINKER_FLAGS}" CACHE INTERNAL "Extra linker flags")
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set(OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE "${OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE}" CACHE INTERNAL "Extra linker flags for Release build")
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set(OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG "${OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG}" CACHE INTERNAL "Extra linker flags for Debug build")
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# set default visibility to hidden
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if(CMAKE_COMPILER_IS_GNUCXX AND CMAKE_OPENCV_GCC_VERSION_NUM GREATER 399)
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add_extra_compiler_option(-fvisibility=hidden)
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add_extra_compiler_option(-fvisibility-inlines-hidden)
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endif()
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#combine all "extra" options
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set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OPENCV_EXTRA_FLAGS} ${OPENCV_EXTRA_C_FLAGS}")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OPENCV_EXTRA_FLAGS} ${OPENCV_EXTRA_CXX_FLAGS}")
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set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${OPENCV_EXTRA_FLAGS_RELEASE}")
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set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${OPENCV_EXTRA_FLAGS_RELEASE}")
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set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${OPENCV_EXTRA_FLAGS_DEBUG}")
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set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${OPENCV_EXTRA_FLAGS_DEBUG}")
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${OPENCV_EXTRA_EXE_LINKER_FLAGS}")
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set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} ${OPENCV_EXTRA_EXE_LINKER_FLAGS_RELEASE}")
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set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} ${OPENCV_EXTRA_EXE_LINKER_FLAGS_DEBUG}")
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if(MSVC)
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# avoid warnings from MSVC about overriding the /W* option
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# we replace /W3 with /W4 only for C++ files,
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# since all the 3rd-party libraries OpenCV uses are in C,
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# and we do not care about their warnings.
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string(REPLACE "/W3" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
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string(REPLACE "/W3" "/W4" CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE}")
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string(REPLACE "/W3" "/W4" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}")
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if(NOT ENABLE_NOISY_WARNINGS AND MSVC_VERSION EQUAL 1400)
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ocv_warnings_disable(CMAKE_CXX_FLAGS /wd4510 /wd4610 /wd4312 /wd4201 /wd4244 /wd4328 /wd4267)
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endif()
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# allow extern "C" functions throw exceptions
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foreach(flags CMAKE_C_FLAGS CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_RELEASE CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_DEBUG)
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string(REPLACE "/EHsc-" "/EHs" ${flags} "${${flags}}")
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string(REPLACE "/EHsc" "/EHs" ${flags} "${${flags}}")
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string(REPLACE "/Zm1000" "" ${flags} "${${flags}}")
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endforeach()
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if(NOT ENABLE_NOISY_WARNINGS)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4251") #class 'std::XXX' needs to have dll-interface to be used by clients of YYY
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endif()
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endif()
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