lint [sw] <file>...

'A C program verifier'.
If multiple files are given, they are checked for mutual compatability.

Switches -
v	- Allow unused args in functions.
x	- Report extern vars which are never used.
a	- Report assignment of long vals to int vars.
c	- Report questionable casts.
u	- Allow undefined fn's and var's. (Useful for sub-modules).
