pcretest(1) on Linux
The text 560f77383e5d, as Debian 6.0 (Squeeze) shipped it.
a program for testing Perl-compatible regular expressions.
Flags it lists
-
-C -
-M -
-S -
-b -
-d -
-dfa -
-help -
-i -
-m -
-o -
-p -
-q -
-t -
-tm