1 .\" Copyright (c) 1980, 1991, 1993
2 .\" The Regents of the University of California. All rights reserved.
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that the following conditions
7 .\" 1. Redistributions of source code must retain the above copyright
8 .\" notice, this list of conditions and the following disclaimer.
9 .\" 2. Redistributions in binary form must reproduce the above copyright
10 .\" notice, this list of conditions and the following disclaimer in the
11 .\" documentation and/or other materials provided with the distribution.
12 .\" 3. All advertising materials mentioning features or use of this software
13 .\" must display the following acknowledgement:
14 .\" This product includes software developed by the University of
15 .\" California, Berkeley and its contributors.
16 .\" 4. Neither the name of the University nor the names of its contributors
17 .\" may be used to endorse or promote products derived from this software
18 .\" without specific prior written permission.
20 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 .\" @(#)config.8 8.2 (Berkeley) 4/19/94
33 .\" $FreeBSD: src/usr.sbin/config/config.8,v 1.21.2.7 2003/04/23 07:32:39 brueffer Exp $
34 .\" $DragonFly: src/usr.sbin/config/config.8,v 1.2 2003/06/17 04:29:53 dillon Exp $
41 .Nd build system configuration files
48 This is the old version of the
51 It understands the old autoconfiguration scheme
52 used on the HP300, i386, DECstation, and derivative platforms.
59 applicable to the architecture that you are running
60 will be installed on your machine.
64 utility builds a set of system configuration files from the file
67 the system to configure.
71 what files are needed to generate a system and
72 can be augmented by configuration specific set of files
73 that give alternate files for a specific machine
78 Available options and operands:
79 .Bl -tag -width ".Ar SYSTEM_NAME"
83 as the output directory, instead of the default one.
88 to the directory given.
90 Configure a system for debugging.
92 Configure a system for profiling; for example,
100 configures a system for high resolution profiling.
102 Remove the old compile directory (see below).
104 Specify the name of the system configuration file
105 containing device specifications, configuration options
106 and other system parameters for one system configuration.
110 should be run from the
112 subdirectory of the system source (usually
113 .Pa /sys/ Ns Va ARCH Ns Pa /conf ) ,
116 represents one of the architectures supported by
119 creates the directory
120 .Pa ../../compile/ Ns Ar SYSTEM_NAME
121 or the one given with the
124 as necessary and places all output files there.
125 If the output directory already exists and the
127 flag was specified, it will be removed first.
130 consists of a number of files; for the
135 of what I/O devices are attached to the system;
139 in building the system;
142 the number of various devices that will be compiled into the system.
146 it is necessary to run
148 in the directory where the new makefile
152 utility prints a reminder of this when it completes.
154 If any other error messages are produced by
156 the problems in the configuration file should be corrected and
159 Attempts to compile a system that had configuration errors
163 .Cd "options INCLUDE_CONFIG_FILE"
164 is used in the configuration file the
165 entire input file is embedded in the new kernel.
168 can be used to extract it from a kernel:
169 to extract the configuration information, use the command
171 .Dl "strings -n 3 kernel | sed -n 's/^___//p'"
175 kernels are compiled without symbols due to the heavy load on the
176 system when compiling a
179 A debug kernel contains complete symbols for all the source files, and
180 enables an experienced kernel programmer to analyse the cause of a problem.
182 debuggers available prior to
184 were able to find some information
185 from a normal kernel;
187 provides very little support for normal kernels, and a debug kernel is needed
188 for any meaningful analysis.
190 For reasons of history, time and space, building a debug kernel is not the
193 a debug kernel takes up to 30% longer to build and
194 requires about 30 MB of disk storage in the build directory, compared to about 6
195 MB for a non-debug kernel.
196 A debug kernel is about 11 MB in size, compared to
197 about 2 MB for a non-debug kernel.
198 This space is used both in the root file
199 system and at run time in memory.
202 option to build a debug kernel.
205 causes two kernel files to be built in the kernel build directory:
209 is the complete debug kernel.
212 is a copy of the kernel with the debug symbols stripped off.
214 to the normal non-debug kernel.
217 There is currently little sense in installing and booting from a debug kernel,
218 since the only tools available which use the symbols do not run on-line.
220 are therefore two options for installing a debug kernel:
223 .Dq Li "make install"
226 in the root file system.
228 .Dq Li "make install.debug"
231 in the root file system.
234 .Bl -tag -width ".Pa /sys/ Ns Va ARCH Ns Pa /conf/files. Ns Ar SYSTEM_NAME" -compact
235 .It Pa /sys/conf/files
236 list of common files system is built from
237 .It Pa /sys/conf/Makefile. Ns Va ARCH
238 generic makefile for the
240 .It Pa /sys/conf/files. Ns Va ARCH
244 .It Pa /sys/ Ns Va ARCH Ns Pa /conf/files. Ns Ar SYSTEM_NAME
245 list of files specific to
249 .It Pa /sys/compile/ Ns Ar SYSTEM_NAME
250 default kernel build directory for system
256 portion of each device in section 4.
258 .%T "Building 4.3 BSD UNIX System with Config"
261 The line numbers reported in error messages are usually off by one.