CPP(8) 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 compilers. 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@modtime, 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
These symbols are also predefined in various implementa-
tions:
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 ini-
tial `#' 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.
CPP(8) CPP(8)
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