Options and directives listed

These options suppress specific messages:

-a

Suppress:

• assignment causes implicit narrowing conversion

• conversion to larger integral type may sign-extend incorrectly

-b

For unreachable break and empty statements, suppress:

• statement not reached

-h

Suppress:

• assignment operator "=" found where equality operator "==" was expected

• constant operand to op: "!"

• fallthrough on case statement

• pointer cast may result in improper alignment

• precedence confusion possible; parenthesize

• statement has no consequent: if

• statement has no consequent: else

-m

Suppress:

• declared global, could be static

-u

Suppress:

• name defined but never used

• name used but not defined

-v

Suppress:

• argument unused in function

-x

Suppress:

• name declared but never used or defined

These options enable specific messages:

-p

Enable:

• conversion to larger integral type may sign-extend incorrectly

• may be indistinguishable due to truncation or case

• pointer casts may be troublesome

• nonportable bit-field type

• suspicious comparison of char with value: op "op``"''

-Xc

Enable:

• bitwise operation on signed value nonportable

• function must return int: main()

• may be indistinguishable due to truncation or case

• only 0 or 2 parameters allowed: main()

• nonportable character constant

Other options:

-c

Create a .ln file consisting of information relevant to lint's second pass for every .c file named on the command line. The second pass is not executed.

-F

When referring to the .c files named on the command line, print their path names as supplied on the command line rather than only their base names.

-Idir

Search the directory dir for included header files.

-k

When used with the directive / LINTED [msg] /, print info: msg.

-lx

Access the lint library llib-lx.ln.

-Ldir

When used with -l, search for a lint library in the directory dir.

-n

Suppress checks for compatibility with the default lint standard C library.

-ox

Create the file llib-lx.ln, consisting of information relevant to lint's second pass, from the .c files named on the command line. Generally used with -y or / LINTLIBRARY / to create lint libraries.

-s

Convert compound messages into simple ones.

-y

Treat every .c file named on the command line as if it began with the directive /* LINTLIBRARY */.

-V

Write the product name and release to standard error.

Directives:

/* ARGSUSEDn */

Suppress:

• argument unused in function

for every argument but the first n in the function definition it precedes. Default is 0.

/* CONSTCOND */

Suppress:

• constant in conditional context

• constant operand to op: "!"

• logical expression always false: op "&&"

• logical expression always true: op "||"

for the constructs it precedes. Also
/ CONSTANTCONDITION /.

/* EMPTY */

Suppress:

• statement has no consequent: else

when inserted between the else and semicolon;

• statement has no consequent: if

when inserted between the controlling expression of the if and semicolon.

/* FALLTHRU */

Suppress:

• fallthrough on case statement

for the case statement it precedes. Also
/ FALLTHROUGH /.

/* LINTED [msg] */

When -k is not invoked, suppress every warning pertaining to an intrafile problem except:

• argument unused in function

• declaration unused in block

• set but not used in function

• static unused

• variable unused in function

for the line of code it precedes. msg is ignored.

/* LINTLIBRARY */

When -o is invoked, write to a library .ln file only definitions in the .c file it heads.

/* NOTREACHED */

Suppress:

• statement not reached

for the unreached statements it precedes;

• fallthrough on case statement

for the case it precedes that cannot be reached from the preceding case;

• function falls off bottom without returning value

for the closing curly brace it precedes at the end of the function.

/* PRINTFLIKEn */

Treat the nth argument of the function definition it precedes as a [fs]printf format string and issue:

• malformed format string

for invalid conversion specifications in that argument, and

• function argument type inconsistent with format

• too few arguments for format

• too many arguments for format

for mismatches between the remaining arguments and the conversion specifications. lint issues these warnings by default for errors in calls to [fs]printf functions provided by the standard C library.

/* PROTOLIBn */

When n is 1 and / LINTLIBRARY / is used, write to a library .ln file only function prototype declarations in the .c file it heads. Default is 0, canceling the process.

/* SCANFLIKEn */

Same as / PRINTFLIKEn / except that the nth argument of the function definition is treated as a [fs]scanf format string. By default, lint issues warnings for errors in calls to [fs]scanf functions provided by the standard C library.

/* VARARGSn */

For the function whose definition it precedes, suppress:

• function called with variable number of arguments

for calls to the function with n or more arguments.