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.\"     from: @(#)config.8	5.1 (Berkeley) 1/12/93
.\"	$Id: config.new.8,v 1.3 1993/12/20 22:42:55 davidb Exp $
.\"
.Dd January 12, 1993
.Dt CONFIG.NEW 8
.Os BSD 4
.Sh NAME
.Nm config.new
.Nd build kernel compilation directories
.Sh SYNOPSIS
.Nm config.new
.Op Fl p
.Ar system-name
.Sh DESCRIPTION
.Pp
.Nm Config.new
builds a set of configuration files from the file
.Ar system-name ,
which describes
the system to configure.
.Pp
.Nm Config.new
should run from the
.Pa conf
subdirectory of the top-level machine-specific directory
of the system source (usually
.Pa /sys/arch/MACHINE/conf ,
where
.Pa MACHINE
is one of
.Pa vax ,
.Pa tahoe ,
.Pa hp300 ,
and so forth).
.Nm Config.new
assumes the directory
.Pa ../compile
exists; it places all output files in a subdirectory there,
creating the subdirectory if necessary.
The subdirectory name is taken from the
.Ar system-name ;
thus, configuring with
.Dq Li config.new PICKLE
will use the directory
.Pa ../compile/PICKLE .
.Pp
If the
.Fl p
option is supplied,
.Pa .PROF
is appended to the compilation directory name, and
.Nm config.new
acts as if the lines
.Dq Li makeoptions PROF="-pg"
and
.Dq Li options GPROF
appeared in the configuration file.
This will build a system that includes profiling code; see
.Xr kgmon 8
and
.Xr gprof 1 .
The
.Fl p
flag is expected to be used for
.Dq one-shot
profiles of existing systems;
for regular profiling,
it is probably wiser to make a separate configuration
containing the
.Li makeoptions
line.
.Pp
The old undocumented
.Fl g
flag is no longer supported.
Instead, use
.Dq Li makeoptions DEBUG="-g"
and (typically)
.Dq Li options KGDB .
.Pp
The output of
.Nm config.new
consists of a number of files, principally
.Pa ioconf.c ,
a description of I/O devices that may be attached to the system; and a
.Pa Makefile ,
used by
.Xr make 1
in building the kernel.
.Pp
After running
.Nm config.new ,
it is wise to run
.Dq Li make depend
in the directory where the new makefile
was created.
.Nm Config.new
prints a reminder of this when it completes.
.Pp
If
.Nm config.new
stops due to errors, the problems reported should be corrected and
.Nm config.new
should be run again.
.Nm Config.new
attempts to avoid changing the compilation directory
if there are configuration errors,
but this code is not well-tested,
and some problems (such as running out of disk space)
are unrecoverable.
.Sh SEE ALSO
The SYNOPSIS portion of each device in section 4.
.Rs
.%T "Building 4.4 BSD Systems with Config"
.\" .%T "Device Support in 4.4BSD"
.Re
.Sh HISTORY
The
.Nm config
command appeared in
.Bx 4.1 .
It was completely revised in
.Bx 4.4 .