useful default. Denoted `(Enum)'.
- Set options accept one or more types from a list of implementations of the
feature. All specified implementations will be included. Prefix a type
- with `no' to disable only that implementation (e.g., `--with-sound=noesd'
- to disable ESD). The special values `none' and `all' must be first in the
+ with `no' to disable only that implementation (e.g., `--with-sound=nonas'
+ to disable NAS). The special values `none' and `all' must be first in the
list if used. They change the defaults for all types individually from
autodetect to `no' or `yes' respectively. `--with-sound=none,native' and
`--with-sound=noesd,nonas,native' have the same effect. Denoted `(Set)'.