message: Fix RPM install conflict
diff: @@ -31,4 +31,14 @@ if (UNIX)
  set(CPACK_RPM_PACKAGE_NAME "flatbuffers")
  set(CPACK_PACKAGE_FILE_NAME
  "${CPACK_RPM_PACKAGE_NAME}_${CPACK_RPM_PACKAGE_VERSION}_${CPACK_RPM_PACKAGE_ARCHITECTURE}")
  + if(NOT DEFINED ${CPACK_PACKAGING_INSTALL_PREFIX})
  + # Default packaging install prefix on RedHat systems is /usr.
  + # This is the assumed value when this variable is not defined.
  + # There is currently a conflict with
  + # /usr/${CMAKE_INSTALL_LIBDIR}/cmake which is installed by default
  + # by other packages on RedHat (most notably cmake-filesystem). Ensure
  + # that on these systems, flatbuffers does not package this path.
  + # This patch is required for cmake pre-3.17.
  + list(APPEND CPACK_RPM_EXCLUDE_FROM_AUTO_FILELIST_ADDITION "/usr/${CMAKE_INSTALL_LIBDIR}/cmake")
  + endif()
  endif(UNIX)
  