project(ITKExpat)
set(ITKExpat_THIRD_PARTY 1)

option(
  ITK_USE_SYSTEM_EXPAT
  "Use system-installed expat"
  ${ITK_USE_SYSTEM_LIBRARIES}
)
mark_as_advanced(ITK_USE_SYSTEM_EXPAT)

if(ITK_USE_SYSTEM_EXPAT)
  find_package(EXPAT REQUIRED)
  set(ITKExpat_INCLUDE_DIRS ${ITKExpat_BINARY_DIR}/src)
  set(ITKExpat_SYSTEM_INCLUDE_DIRS "${EXPAT_INCLUDE_DIR}")
  set(ITKExpat_LIBRARIES "${EXPAT_LIBRARY}")
  set(ITKExpat_NO_SRC 1)
else()
  set(
    ITKExpat_INCLUDE_DIRS
    ${ITKExpat_BINARY_DIR}/src
    ${ITKExpat_BINARY_DIR}/src/itkexpat
    ${ITKExpat_SOURCE_DIR}/src
  )
  set(ITKExpat_LIBRARIES ITKEXPAT)
  set(
    ITK_LIBRARY_PROPERTIES
    WINDOWS_EXPORT_ALL_SYMBOLS
    FALSE
  )
  set(
    EXPAT_GE
    ON
    CACHE BOOL
    "Define to make general entity parsing functionality available"
    FORCE
  )
  set(
    XML_GE
    1
    CACHE STRING
    "Define to make general entity parsing functionality available"
    FORCE
  )
endif()

configure_file(src/itk_expat.h.in src/itk_expat.h)

itk_module_impl()