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#-----------------------------------------------------------------------------
MACRO(ITK_THIRD_PARTY_OPTION upper lower)
OPTION(ITK_USE_SYSTEM_${upper} "Use the system's ${lower} library." OFF)
MARK_AS_ADVANCED(ITK_USE_SYSTEM_${upper})
IF(ITK_USE_SYSTEM_${upper})
IF(EXISTS ${CMAKE_ROOT}/Modules/Find${upper}.cmake)
INCLUDE(${CMAKE_ROOT}/Modules/Find${upper}.cmake)
ELSE(EXISTS ${CMAKE_ROOT}/Modules/Find${upper}.cmake)
INCLUDE(${ITK_SOURCE_DIR}/Utilities/Find${upper}.cmake)
ENDIF(EXISTS ${CMAKE_ROOT}/Modules/Find${upper}.cmake)
MARK_AS_ADVANCED(${upper}_INCLUDE_DIR ${upper}_LIBRARY)
IF(${upper}_FOUND)
SET(ITK_${upper}_LIBRARIES ${${upper}_LIBRARIES})
IF("${upper}" MATCHES "^PNG$")
SET(PNG_INCLUDE_DIR ${PNG_PNG_INCLUDE_DIR})
MARK_AS_ADVANCED(PNG_PNG_INCLUDE_DIR)
ENDIF("${upper}" MATCHES "^PNG$")
ELSE(${upper}_FOUND)
MESSAGE(SEND_ERROR "ITK_USE_SYSTEM_${upper} is ON, but ${upper}_LIBRARY is NOTFOUND.")
ENDIF(${upper}_FOUND)
ELSE(ITK_USE_SYSTEM_${upper})
SET(ITK_${upper}_LIBRARIES itk${lower})
ENDIF(ITK_USE_SYSTEM_${upper})
ENDMACRO(ITK_THIRD_PARTY_OPTION)
#-----------------------------------------------------------------------------
# The in-tree third-party libraries are not exported. We only need
# the include directory inside the tree. If using a third-party
# library from the system, though, make sure the system include
# directory is consistent inside and outside the tree.
MACRO(ITK_THIRD_PARTY_INCLUDE upper lower)
IF(ITK_USE_SYSTEM_${upper})
IF(${upper}_INCLUDE_DIR)
SET(ITK_INCLUDE_DIRS_SYSTEM ${ITK_INCLUDE_DIRS_SYSTEM} ${${upper}_INCLUDE_DIR})
ENDIF(${upper}_INCLUDE_DIR)
ELSE(ITK_USE_SYSTEM_${upper})
SET(ITK_INCLUDE_DIRS_BUILD_TREE_CXX ${ITK_INCLUDE_DIRS_BUILD_TREE_CXX}
${ITK_SOURCE_DIR}/Utilities/${lower}
${ITK_BINARY_DIR}/Utilities/${lower}
)
ENDIF(ITK_USE_SYSTEM_${upper})
ENDMACRO(ITK_THIRD_PARTY_INCLUDE)
MACRO(ITK_THIRD_PARTY_INCLUDE2 upper)
IF(ITK_USE_SYSTEM_${upper})
IF(${upper}_INCLUDE_DIR)
SET(ITK_INCLUDE_DIRS_SYSTEM ${ITK_INCLUDE_DIRS_SYSTEM} ${${upper}_INCLUDE_DIR})
ENDIF(${upper}_INCLUDE_DIR)
ENDIF(ITK_USE_SYSTEM_${upper})
ENDMACRO(ITK_THIRD_PARTY_INCLUDE2)
#-----------------------------------------------------------------------------
MACRO(ITK_THIRD_PARTY_SUBDIR upper lower)
IF(NOT ITK_USE_SYSTEM_${upper})
SUBDIRS(${lower})
ENDIF(NOT ITK_USE_SYSTEM_${upper})
ENDMACRO(ITK_THIRD_PARTY_SUBDIR)
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