term% cat index.txt CPP(8) System Manager's Manual CPP(8)
NAME
cpp - C language preprocessor
SYNOPSIS
/lib/cpp [ option ... ] [ ifile [ ofile ] ]
DESCRIPTION
Cpp interprets control lines (marked with `#') for cc(1) and other com‐
pilers. The input, ifile, and output, ofile, default to standard input
and standard output respectively.
The options are:
-P Do not place `#line' indications on the output.
-C Do not remove comments.
-Uname
-Dname
-Dname=def
-Idir Same as in cc(1). -U overrides -D.
-M Pass modification date with file names, in the form file@mod‐
time, where modtime is the integer number of seconds since the
epoch.
-T Truncate preprocessor symbols to eight characters.
The name `__LINE__' is the current line number in the input file,
`__FILE__' is the file name. The line number and (optionally) the file
name may be set by
#line integer-constant " filename "
These symbols are also predefined in various implementations:
operating system:
ibm, gcos, os, tss, unix
hardware: interdata, pdp11, u370, u3b, u3b5, vax
UNIX system: RES, RT
lint(1): lint
Any number of blanks and tabs are allowed between the initial `#' and
the control directive.
A builtin function `defined(name)' or `defined name' may be used in
constant expressions within a #if control lines to test whether name is
defined.
Preprocessor formal parameters are recognized withing quoted strings in
the replacement text. When comments are removed, they are replaced by
null strings; this unofficial feature makes it possible to construct
identifiers by concatenation.
FILES
/usr/include standard directory for include files
CPP(8)