c2man(1) on Linux
The text 6f63b34c8f2e, as Debian 2.1 (Slink), Debian 2.0 (Hamm), Debian 1.3 (Bo), Debian 1.2 (Rex), Debian 1.1 (Buzz) shipped it.
generate manual pages from C source code
Flags it lists
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-B -
-D -
-F -
-G -
-H -
-I -
-L -
-M -
-P -
-S -
-U -
-V -
-b -
-e -
-g -
-i -
-k -
-l -
-n -
-o -
-s -
-v -
-x