if(NOT DEFINED PACKAGE_VENDOR)
  set(PACKAGE_VENDOR "Acme Corporation")
endif()
if(NOT DEFINED PACKAGE_NAME)
  set(PACKAGE_NAME "Anvil")
endif()
if(NOT DEFINED PACKAGE_START_YEAR)
  set(PACKAGE_START_YEAR 1949)
endif()
if(NOT DEFINED PACKAGE_VERSION_MAJOR)
  set(PACKAGE_VERSION_MAJOR 1)
endif()
if(NOT DEFINED PACKAGE_VERSION_MINOR)
  set(PACKAGE_VERSION_MINOR 0)
endif()
if(NOT DEFINED PACKAGE_VERSION_PATCH)
  set(PACKAGE_VERSION_PATCH 0)
endif()
if(NOT DEFINED PACKAGE_VERSION_TWEAK)
  set(PACKAGE_VERSION_TWEAK 0)
endif()
if((NOT DEFINED FILE_VERSION_MAJOR) OR (NOT DEFINED FILE_VERSION_MINOR) OR
   (NOT DEFINED FILE_VERSION_PATCH) OR (NOT DEFINED FILE_VERSION_TWEAK))
  set(FILE_VERSION_MAJOR ${PACKAGE_VERSION_MAJOR})
  set(FILE_VERSION_MINOR ${PACKAGE_VERSION_MINOR})
  set(FILE_VERSION_PATCH ${PACKAGE_VERSION_PATCH})
  set(FILE_VERSION_TWEAK ${PACKAGE_VERSION_TWEAK})
endif()
