Commands associated with this target are executed if
can't find any description file entries or suffix rules with which to build a
Ignore error codes. Same as the
Files you specify for this target are not removed
when you send a signal (such as interrupt) that aborts
or when a command line in your description file returns an error.
Execute commands but do not echo them. Same as the
Suffixes associated with this target are meaningful in suffixes rules. If no suffixes are listed, the existing list of suffix rules are effectively "turned off."