117 lines
2.1 KiB
Plaintext
117 lines
2.1 KiB
Plaintext
|
.TH CPP 1
|
||
|
|
.SH NAME
|
||
|
|
cpp \- C language preprocessor
|
||
|
|
.SH SYNOPSIS
|
||
|
|
.B cpp
|
||
|
|
[
|
||
|
|
.I option ...
|
||
|
|
]
|
||
|
|
[
|
||
|
|
.I ifile
|
||
|
|
[
|
||
|
|
.I ofile
|
||
|
|
]
|
||
|
|
]
|
||
|
|
.SH DESCRIPTION
|
||
|
|
.I Cpp\^
|
||
|
|
interprets ANSI C preprocessor directives
|
||
|
|
and does macro substitution.
|
||
|
|
The input
|
||
|
|
.I ifile
|
||
|
|
and output
|
||
|
|
.I ofile
|
||
|
|
default to standard input and standard output respectively.
|
||
|
|
.PP
|
||
|
|
The options are:
|
||
|
|
.TP
|
||
|
|
.BI -D name\^
|
||
|
|
.PD 0
|
||
|
|
.TP
|
||
|
|
.BI -D name=def\^
|
||
|
|
.TP
|
||
|
|
.BI -I dir\^
|
||
|
|
Same as in
|
||
|
|
.IR 2c "(1): add
|
||
|
|
.I dir
|
||
|
|
to the search for
|
||
|
|
.CW search
|
||
|
|
directives.
|
||
|
|
.PD
|
||
|
|
.TP
|
||
|
|
.B -M
|
||
|
|
Generate no output except a list of include files
|
||
|
|
in a form suitable for specifying dependencies to
|
||
|
|
.IR mk (1).
|
||
|
|
Use twice to list files in angle brackets.
|
||
|
|
.TP
|
||
|
|
.B -N
|
||
|
|
Turn off default include directories. All must be
|
||
|
|
specified with
|
||
|
|
.BR -I ,
|
||
|
|
or in the environment variable
|
||
|
|
.BR include .
|
||
|
|
Without this option,
|
||
|
|
.B /$objtype/include
|
||
|
|
and
|
||
|
|
.B /sys/include
|
||
|
|
are used as the last two searched directories for include directives,
|
||
|
|
where
|
||
|
|
.B $objtype
|
||
|
|
is read from the environment.
|
||
|
|
.TP
|
||
|
|
.B -V
|
||
|
|
Print extra debugging information.
|
||
|
|
.TP
|
||
|
|
.B -P
|
||
|
|
Do not insert
|
||
|
|
.RB `` #line ''
|
||
|
|
directives into the output.
|
||
|
|
.TP
|
||
|
|
.B -.
|
||
|
|
Inhibit include search in the source's directory.
|
||
|
|
.TP
|
||
|
|
.B -i
|
||
|
|
Print the list of directories searched when
|
||
|
|
.I #include
|
||
|
|
is found.
|
||
|
|
Last listed are searched first.
|
||
|
|
.PD
|
||
|
|
.PP
|
||
|
|
In the absence of the
|
||
|
|
.B -P
|
||
|
|
option, the processed text output is sprinkled
|
||
|
|
with lines that show the original input line numbering:
|
||
|
|
.IP
|
||
|
|
.B #line
|
||
|
|
.I linenumber
|
||
|
|
.L
|
||
|
|
"\fIifile\fP"
|
||
|
|
.PP
|
||
|
|
The command reads the environment variable
|
||
|
|
.IR include
|
||
|
|
and adds its (blank-separated) list of directories to
|
||
|
|
the standard search path for
|
||
|
|
.CW #include
|
||
|
|
directives. They are looked at before any directories specified with
|
||
|
|
.BR -I ,
|
||
|
|
which are looked at before the default directories.
|
||
|
|
.PP
|
||
|
|
The input language is as described in the ANSI C standard.
|
||
|
|
The standard Plan 9 C compilers do not use
|
||
|
|
.IR cpp ;
|
||
|
|
they contain their own simple but adequate preprocessor, so
|
||
|
|
.I cpp
|
||
|
|
is usually superfluous.
|
||
|
|
.SH FILES
|
||
|
|
.TF /objtype/include
|
||
|
|
.TP
|
||
|
|
.B /sys/include
|
||
|
|
directory for machine-independent include files
|
||
|
|
.TP
|
||
|
|
.B /$objtype/include
|
||
|
|
directory for machine-dependent include files
|
||
|
|
.SH SOURCE
|
||
|
|
.B /sys/src/cmd/cpp
|
||
|
|
.SH SEE ALSO
|
||
|
|
.IR 2c (1)
|