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

CFLOW {l) CFLOW (l)
NAME
cfiow - generate C flow graph
SYNOPSIS
cftow [-r] [ -ix] [-i_] [-dnum] files
DESCRIPTION
Cftow analyzes a collection of C, YACC, LEX, assembler, and
object files and attempts to build a graph charting the external
references. Files suffixed in .y , .I, .c, and .i are YACC'd, LEX'd,
and C-preprocessed (bypassed for .i files) as appropriate and then
run through the first pass of lint(l). (The -1, -D, and -U
options of the C-preprocessor are also understood.) Files suffixed
with .s are assembled and information is extracted (as in .o files)
from the symbol table. The output of all this non-trivial processing
is collected and turned into a graph of external references
which is displayed upon the standard output.
Each line of output begins with a reference (i.e., line) number, followed
by a suitable number of tabs indicating the level. Then the
name of the global (normally only a function not defined as an
external or beginning with an underscore; see below for the -i
inclusion option) a colon and its definition. For information
extracted from C source, the definition consists of an abstract type
declaration (e.g., char * ), and, delimited by angle brackets, the
name of the source file and the line number where the definition
was found. Definitions extracted from object files indicate the file
name and location counter under which the symbol appeared (e.g.,
text). Leading underscores in C-style external names are deleted.
Once a definition of a name has been printed, subsequent references
to that name contain only the reference number of the line
where the definition may be found. For undefined references, only
< > is printed.
As an example, given the following in file.c:
int
main()
{
}
f()
{
}
the command
i· I
f();
g();
f{);
cfiow file.c
i=h();
- 1-