filepp(1) on Linux
The text 644e5ca5d72d, as Debian 8 (Jessie) shipped it.
A generic file preprocessor
Flags it lists
-
-D -
-I -
-M -
-U -
-b -
-c -
-d -
-dd -
-dl -
-dpost -
-dpre -
-ds -
-e -
-ecn -
-h -
-k -
-lrn -
-mpnk -
-ov -
-pb -
-re -
-s -
-u -
-v -
-w