cmake HAVE_ISWCTYPE examples

alibaba/AliSQL cmake/readline.cmake :53 

CHECK_FUNCTION_EXISTS(iswctype HAVE_ISWCTYPE)

arkdb/arkproxy cmake/readline.cmake :39 

CHECK_FUNCTION_EXISTS(iswctype HAVE_ISWCTYPE)

alibaba/AliSQLBackup cmake/readline.cmake :53 

CHECK_FUNCTION_EXISTS(iswctype HAVE_ISWCTYPE)