cmake HAVE_READDIR_R examples

alibaba/AliSQL configure.cmake :563 

CHECK_FUNCTION_EXISTS (readdir_r HAVE_READDIR_R)

arkdb/arkproxy configure.cmake :382 

CHECK_FUNCTION_EXISTS (readdir_r HAVE_READDIR_R)

alibaba/AliSQLBackup configure.cmake :478 

CHECK_FUNCTION_EXISTS (readdir_r HAVE_READDIR_R)

bareos/bareos core/cmake/BareosCheckFunctions.cmake :77 

check_function_exists(readdir_r HAVE_READDIR_R)