#-----------------------------------------------------------------------------
MACRO(VTK_THIRD_PARTY_WARNING_SUPPRESS upper lang)
  IF(NOT ${upper}_WARNINGS_ALLOW)
    # Visual Studio generators of CMake use /W0 to suppress warnings.
    # MSVC complains if another warning level is given, so remove it.
    IF(MSVC)
      SET(${upper}_WARNINGS_BLOCKED 1)
      STRING(REGEX REPLACE "(^| )([/-])W[0-9]( |$)" " "
        CMAKE_${lang}_FLAGS "${CMAKE_${lang}_FLAGS}")
      SET(CMAKE_${lang}_FLAGS "${CMAKE_${lang}_FLAGS} /W0")
    ENDIF()

    # Borland uses -w- to suppress warnings.
    IF(BORLAND)
      SET(${upper}_WARNINGS_BLOCKED 1)
      SET(CMAKE_${lang}_FLAGS "${CMAKE_${lang}_FLAGS} -w-")
    ENDIF()

    # Most compilers use -w to suppress warnings.
    IF(NOT ${upper}_WARNINGS_BLOCKED)
      SET(CMAKE_${lang}_FLAGS "${CMAKE_${lang}_FLAGS} -w")
    ENDIF()
  ENDIF()
ENDMACRO()