在根目录的CMakelists.txt找到这样一段

# ----------------------------------------------------------------------------

# Use statically or dynamically linked CRT?
# Default: dynamic
# ----------------------------------------------------------------------------
if(MSVC)
  include(cmake/OpenCVCRTLinkage.cmake)
endif(MSVC)

###############################

#添加的部分

###############################

**if(MSVC)
  add_definitions(-D_CRT_SECURE_NO_WARNINGS)
  if(NOT BUILD_WITH_STATIC_CRT)
    foreach(flag_var
            CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
            CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
            CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
            CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
      if(${flag_var} MATCHES "/MD")
        string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
      endif()
      if(${flag_var} MATCHES "/MDd")
        string(REGEX REPLACE "/MDd" "/MTd" ${flag_var} "${${flag_var}}")
      endif()
    endforeach(flag_var)
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /NODEFAULTLIB:atlthunk.lib /NODEFAULTLIB:msvcrt.lib /NODEFAULTLIB:msvcrtd.lib")
    set(CMAKE_EXE_LINKER_FLAGS_DEBUG "${CMAKE_EXE_LINKER_FLAGS_DEBUG} /NODEFAULTLIB:libcmt.lib")
    set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /NODEFAULTLIB:libcmtd.lib")
  endif()
endif()**
###############################

if(WIN32 AND NOT MINGW)
  add_definitions(-D_VARIADIC_MAX=10)
endif(WIN32 AND NOT MINGW)