cmake HAVE_ISWLOWER examples

alibaba/AliSQL cmake/readline.cmake :49 

CHECK_FUNCTION_EXISTS(iswlower HAVE_ISWLOWER)

arkdb/arkproxy cmake/readline.cmake :35 

CHECK_FUNCTION_EXISTS(iswlower HAVE_ISWLOWER)

alibaba/AliSQLBackup cmake/readline.cmake :49 

CHECK_FUNCTION_EXISTS(iswlower HAVE_ISWLOWER)