NAME

cpp − C language preprocessor

SYNOPSIS

/lib/cpp [ −CPRM ] [ −Dname ] [ −Dname=def ] [ −Uname ] [ −Idirectory ] [ infile ] [ outfile ]

DESCRIPTION

Cpp is the standard UNIX C pre-processor.  It is not ANSI-conformant; if an ANSI pre-processor is required, use cc −E. 

OPTIONS

If there are two non-flag arguments then the first is the name of the input file and the second is the name of the output file.  If there is one non-flag argument then it is the name of the input file and the output is written on the standard output.  If there are no non-flag arguments then the input is taken from the standard input and the output is written on the standard output.  Flag arguments are:

−C retain comments in output

−Dname
define name as 1

−Dname=def
define name as def

−Idirectory
add directory to list searched for include files.  Directories added are searched in left-to-right order, before the standard locations. 

−M generate Makefile dependencies for the .o files specified on the command line. 

−P don’t produce line control directives

−R allow recursive macros

−Uname
undefine name

SEE ALSO

cc(1), m4(1),

7th Edition  —  Revision 1.1 of 19/11/90