Working with the Unix OS

Development Tools
/* compute size of increment to next stop */
int findstop(int col)
{
return (TABSIZE – (col * TABSIZE) );
}
LINT
A C program checker/verifier. Attempts to detect features that are likely to be:
- execution errors – detects bugs
- non-portable
- wasteful of resources – obscurities
Also inconsistencies in code:
- unreachable statements
- loops not entered at top
- automatic variables declared and not used
- logical expressions that are constant
- return values in functions
- number of argument in functions
- function values changed but not returned
- checks consistency with libraries
- enforce type-checking rules more strictly
- find legal constructions that may produce errors used for portability
usage:
lint [options] files libraries
options:
-a suppress messages about assignments of long values to variables that are not long
-b suppress messages about break statements that can not be reached
consult "man lint"
INDENT
Indent and format C program source. It reformats the C program in the input-file according to switches:
indent [ input-file [ output-file ] ) [ switches ]
If you only specify an input-file, formatting is written back into the input file (a backup is made in file.BAK)
There are options to place blank lines before or after various blocks of code: -bap -bad,
-bbb, -bc
You may turn off the -bc option with -nbc.
Control the layout of compound statements: -br, -bl, -brr
if (...)
{/* -br option */
code
}
The layout of comments: -cn, -cdn, -cdn
CTAGS
Create a tags file for "vi". Each line of the tags file contains the object name, file in which it is defined, and an
address specification for the object definition
-x causes ctags to print a simple function index: function name, filename, line number, text of line to standard
output (no tags file is created)
C Compiler
Example:
$ cc -c main.c filel.c file2.c
54