gpre(1) on Linux
The text d5fe76fb633e, as Debian 10 (Buster) shipped it.
Firebird source pre-processor
Flags it lists
-
-ada -
-ansi -
-base -
-c -
-charset -
-cob -
-cplusplus -
-cxx -
-d_float -
-database -
-dfm -
-either_case -
-fetch_password -
-fortran -
-lang_internal -
-manual -
-no_lines -
-noqli -
-output -
-pascal -
-password -
-raw -
-rmc -
-sql_dialect -
-sqlda -
-trusted -
-user -
-verbose -
-x -
-z