HP UX Operating Systems 515

m4(1)		m4(1)
syscmd	Executes the HP-UX system command given in the	®rst argument. No value	is
	returned.
sysval	Is the return code from the last call to syscmd.
traceoff	Turns off trace globally and for any macros speci®ed.	Macros speci®cally traced	by

traceon can be untraced only by speci®c calls to traceoff.

traceon With no arguments, turns on tracing for all macros (including built-ins). Otherwise, turns on tracing for named macros.

translit Transliterates the characters in its ®rst argument from the set given by the second argument to the set given by the third. No abbreviations are permitted.

undefine Removes the de®nition of the macro named in its argument.

undivert Causes immediate output of text from diversions named as arguments, or all diversions if no argument. Text may be undiverted into another diversion. Undiverting discards the diverted text.

(XPG4 only.) It is an error to specify an argument containing any non-numeric character for the built-in- macros: decr, divert, incr, m4exit, substr, undivert, and eval.