The list consists of keywords separated by commas or colons. Since all these warnings are on by default, include a keyword prefixed by no- to turn off a particular warning. There are three special keywords: all to turn on all the warnings about arguments, none to turn them all off, and help to print the list of all the keywords with a brief explanation of each. If list is omitted, -arguments is equivalent to -arguments=all, and -noarguments is equivalent to -arguments=none. The warning keywords with their meanings are as follows:
For compatibility with previous versions of ftnchek, a numeric form of this setting is also accepted: the list is replaced by a number from 0 to 3. A value of 0 turns all the warnings off, 1 turns on only number, 2 turns on all except number, and 3 turns all the warnings on.
This setting does not apply to checking invocations of intrinsic functions or statement functions, which can only be turned off by the -nocheck option.
See also: -array, -library, -usage.