unifdefall(1) on FreeBSD
The text ac3557cdbac4, as FreeBSD 5.5-RELEASE, FreeBSD 5.4-RELEASE, FreeBSD 5.3-RELEASE, FreeBSD 5.2.1-RELEASE, FreeBSD 5.2-RELEASE, FreeBSD 5.1-RELEASE shipped it.
remove preprocessor conditionals from code
Flags it lists
-
-D -
-I -
-U -
-c -
-e -
-iD -
-iU -
-k -
-l -
-s -
-t