Turn debugging info on\&. GNU LilyPond reads the file \fB\&.dstreamrc\fP,
which lists what functions and classes may produce copious debugging
output\&.
+.IP "-s,--safe"
+Disallow untrusted \f(CW\einclude\fP directives, backslashes in
+code and named output\&.
.IP "-t,--test"
Switch on any experimental features\&. Not for general public use\&.
.IP "-w,--warranty"