191 lines
5.4 KiB
Groff
191 lines
5.4 KiB
Groff
.\" $NetBSD: config.8,v 1.11 1997/02/05 19:17:28 thorpej Exp $
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.\"
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.\" Copyright (c) 1980, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)config.8 8.2 (Berkeley) 4/19/94
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.\"
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.Dd April 19, 1994
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.Dt CONFIG 8
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.Os BSD 4
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.Sh NAME
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.Nm config
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.Nd build kernel compilation directories
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.Sh SYNOPSIS
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.Nm config
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.Op Fl b Ar builddir
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.Op Fl s Ar srcdir
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.Op Fl p
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.Op Ar config-file
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.Sh DESCRIPTION
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.Pp
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.Nm Config
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creates a kernel build directory from the file
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.Ar config-file ,
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which describes the system to configure.
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.Pp
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There are several different ways to run the
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.Nm config
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program. The traditional way is to run
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.Nm config
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from the
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.Pa conf
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subdirectory of the machine-specific directory of the system source
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(usually
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.Pa /sys/arch/MACHINE/conf ,
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where
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.Pa MACHINE
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is one of
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.Pa vax ,
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.Pa tahoe ,
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.Pa hp300 ,
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and so forth), and to specify as the
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.Ar config-file
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the name of a file located in that directory.
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.Nm config
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will by default create files in the directory
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.Pa ../compile/SYSTEMNAME ,
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where
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.Pa SYSTEMNAME
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is the last path component of
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.Ar config-file .
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.Nm Config
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will assume that the top-level kernel source directory is located four
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directories above the build directory.
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.Pp
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Another way is to create the build directory yourself, place the
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configuration file in the build directory with the name
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.Pa CONFIG ,
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and run
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.Nm config
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from within the build directory without specifying a
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.Ar config-file .
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.Nm Config
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will then by default create files in the current directory. If you
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run
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.Nm config
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this way, you must specify the location of the top-level kernel source
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directory using the
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.Fl s
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option or by using the
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.Dq Li source
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directive at the beginning of the system configuration file.
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.Pp
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Finally, you can specify the build directory for
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.Nm config
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and run it from anywhere. You can specify a build directory with the
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.Fl b
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option or by using the
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.Dq Li build
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directive at the beginning of the system configuration file. You must
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specify the location of the top-level kernel source directory if you
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specify a build directory.
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.Pp
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If the
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.Fl p
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option is supplied,
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.Pa .PROF
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is appended to the default compilation directory name, and
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.Nm config
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acts as if the lines
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.Dq Li makeoptions PROF="-pg"
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and
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.Dq Li options GPROF
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appeared in the configuration file.
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This will build a system that includes profiling code; see
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.Xr kgmon 8
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and
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.Xr gprof 1 .
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The
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.Fl p
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flag is expected to be used for
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.Dq one-shot
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profiles of existing systems;
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for regular profiling,
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it is probably wiser to make a separate configuration
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containing the
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.Li makeoptions
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line.
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.Pp
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The old undocumented
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.Fl g
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flag is no longer supported.
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Instead, use
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.Dq Li makeoptions DEBUG="-g"
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and (typically)
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.Dq Li options KGDB .
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.Pp
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The output of
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.Nm config
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consists of a number of files, principally
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.Pa ioconf.c ,
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a description of I/O devices that may be attached to the system; and a
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.Pa Makefile ,
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used by
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.Xr make 1
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in building the kernel.
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.Pp
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After running
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.Nm config ,
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it is wise to run
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.Dq Li make depend
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in the directory where the new makefile
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was created.
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.Nm Config
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prints a reminder of this when it completes.
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.Pp
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If
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.Nm config
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stops due to errors, the problems reported should be corrected and
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.Nm config
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should be run again.
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.Nm Config
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attempts to avoid changing the compilation directory
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if there are configuration errors,
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but this code is not well-tested,
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and some problems (such as running out of disk space)
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are unrecoverable.
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.Sh SEE ALSO
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The SYNOPSIS portion of each device in section 4.
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.Rs
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.%T "Building 4.4 BSD Systems with Config"
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.\" .%T "Device Support in 4.4BSD"
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.Re
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.sp
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.Xr options 4
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.Sh HISTORY
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The
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.Nm config
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command appeared in
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.Bx 4.1 .
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It was completely revised in
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.Bx 4.4 .
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