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#
# Figure out how the compiler prefers to declare templated functions as friends
# of a templated class.
#
SET(ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT)
TRY_COMPILE(ITK_SUPPORTS_TEMPLATED_FRIEND_FUNCTION_WITH_NULL_STRING
${ITK_BINARY_DIR}/CMakeTmp
${ITK_SOURCE_DIR}/CMake/itkTestFriendTemplatedFunction.cxx
COMPILE_DEFINITIONS -DTRY_COMPILE_FRIEND_WITH_NULL_TEMPLATE_STRING
OUTPUT_VARIABLE ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT
)
IF(ITK_SUPPORTS_TEMPLATED_FRIEND_FUNCTION_WITH_NULL_STRING)
IF(ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT MATCHES "[Ww]arning")
IF(NOT ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT MATCHES " 0 [Ww]arning")
SET(ITK_SUPPORTS_TEMPLATED_FRIEND_FUNCTION_WITH_NULL_STRING CACHE INTERNAL FALSE)
ENDIF(NOT ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT MATCHES " 0 [Ww]arning")
ENDIF(ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT MATCHES "[Ww]arning")
ENDIF(ITK_SUPPORTS_TEMPLATED_FRIEND_FUNCTION_WITH_NULL_STRING)
TRY_COMPILE(ITK_SUPPORTS_TEMPLATED_FRIEND_FUNCTION_WITH_EMPTY_BRACKETS
${ITK_BINARY_DIR}/CMakeTmp
${ITK_SOURCE_DIR}/CMake/itkTestFriendTemplatedFunction.cxx
COMPILE_DEFINITIONS -DTRY_COMPILE_FRIEND_WITH_EMPTY_TEMPLATE_BRACKETS
OUTPUT_VARIABLE ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT
)
IF(ITK_SUPPORTS_TEMPLATED_FRIEND_FUNCTION_WITH_EMPTY_BRACKETS)
IF(ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT MATCHES "[Ww]arning")
IF(NOT ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT MATCHES " 0 [Ww]arning")
SET(ITK_SUPPORTS_TEMPLATED_FRIEND_FUNCTION_WITH_EMPTY_BRACKETS CACHE INTERNAL FALSE)
ENDIF(NOT ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT MATCHES " 0 [Ww]arning")
ENDIF(ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT MATCHES "[Ww]arning")
ENDIF(ITK_SUPPORTS_TEMPLATED_FRIEND_FUNCTION_WITH_EMPTY_BRACKETS)
TRY_COMPILE(ITK_SUPPORTS_TEMPLATED_FRIEND_FUNCTION_WITH_TEMPLATE_ARGUMENTS
${ITK_BINARY_DIR}/CMakeTmp
${ITK_SOURCE_DIR}/CMake/itkTestFriendTemplatedFunction.cxx
COMPILE_DEFINITIONS -DTRY_COMPILE_FRIEND_WITH_TEMPLATE_ARGUMENTS
OUTPUT_VARIABLE ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT
)
IF(ITK_SUPPORTS_TEMPLATED_FRIEND_FUNCTION_WITH_TEMPLATE_ARGUMENTS)
IF(ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT MATCHES "[Ww]arning")
IF(NOT ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT MATCHES " 0 [Ww]arning")
SET(ITK_SUPPORTS_TEMPLATED_FRIEND_FUNCTION_WITH_TEMPLATE_ARGUMENTS CACHE INTERNAL FALSE)
ENDIF(NOT ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT MATCHES " 0 [Ww]arning")
ENDIF(ITK_TEMPLATE_FRIEND_FUNCTION_TEST_OUTPUT MATCHES "[Ww]arning")
ENDIF(ITK_SUPPORTS_TEMPLATED_FRIEND_FUNCTION_WITH_TEMPLATE_ARGUMENTS)
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