c89(1) on FreeBSD
The text 34a3c8a8fbb2, as FreeBSD 13.2-RELEASE, FreeBSD 13.1-RELEASE, FreeBSD 13.0-RELEASE shipped it.
POSIX.2 C language compiler
Flags it lists
-
-D -
-E -
-I -
-L -
-O -
-U -
-c -
-g -
-l -
-o -
-s