AT&T UNIX™PC Unix System V Users Manual - tenox

LINT ( l ) LINT ( 1 )
NAME
lint - a C program checker
SYNOPSIS
lint [ -abhlnpuvx ] file ...
DESCRIPTION
Lint attempts to detect features of the C program files which are
likely to be bugs, non-portable, or wasteful. It also checks type
usage more strictly than the compilers. Among the things which
are currently detected are unreachable statements, loops not
entered at the top, automatic variables declared and not used, and
logical expressions whose value is constant. Moreover, the usage
of functions is checked to find functions which return values in
some places and not in others, functions called with varying
numbers of arguments, and functions whose values are not used.
It is assumed that all the files are to be loaded together; they are
checked for mutual compatibility. By default, lint uses function
definitions from the standard lint library llib-lc.ln; function
definitions from the portable lint library llib-port.ln are used
when lint is invoked with the -p option.
Any number of lint options may be used, in any order. The following
options are used to suppress certain kinds of complaints:
-a Suppress complaints about assignments of long values to
variables that are not long.
-b Suppress complaints about break statements that cannot
be reached. (Programs produced by lex or yacc will often
result in a large number of such complaints.)
-h Do not apply heuristic tests that attempt to intuit bugs,
improve style, and reduce waste.
-u Suppress complaints about functions and external variables
used and not defined, or defined and not used. (This
option is suitable for running lint on a subset of files of a
larger program.)
-v Suppress complaints about unused arguments in functions.
-x Do not report variables referred to by external declarations
but never used.
The following arguments alter lint 's behavior:
-lx Include additional lint library llib-lx.ln. You can include
a lint version of the math library llib-lm.ln by inserting
-lm on the command line. This argument does not
suppress the default use of llib-lc.ln. This option can be
used to keep local lint libraries and is useful in the
development of multi-file projects.
-n Do not check compatibility against either the standard or
the portable lint library.
-p Attempt to check portability to other dialects (IBM and
GCOS) of C.
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