regexp-assemble(1p) on Linux
The text c3aaef0089ed, as Debian 7 (Wheezy) shipped it.
Assemble a list of regular expressions from a file
Flags it lists
-
-S -
-T -
-U -
-a -
-b -
-c -
-d -
-i -
-n -
-p -
-r -
-s -
-t -
-u -
-v -
-w