c89(1) on FreeBSD
The text 6543d94bdc24, as FreeBSD 3.5.1-RELEASE, FreeBSD 3.5-RELEASE, FreeBSD 3.4-RELEASE, FreeBSD 3.3-RELEASE shipped it.
Posix.2 C language compiler
Flags it lists
-
-D -
-E -
-I -
-L -
-O -
-U -
-c -
-g -
-l -
-o -
-s