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32 .\" $DragonFly: src/share/man/man5/kernconf.5,v 1.7 2008/05/02 22:10:58 swildner Exp $
39 .Nd kernel configuration file
52 This manual page describes the structure of the kernel configuration file.
55 to create a build environment where a kernel may be built using
59 for information on how to build kernels.
61 Each line starts with a keyword at the beginning of the line and is
62 followed by additional parameters.
63 Long input lines may be broken into shorter lines by starting the
64 second and subsequent lines with a white space character.
65 Numbers are specified using
68 Blank lines are ignored.
71 character is interpreted as a comment and is ignored along with everything
72 that follows it on the same line.
74 The following keywords are recognized in a configuration file:
76 .Bl -tag -width indent -compact
80 This system is to run on the CPU type
90 More than one CPU type specification can appear in a configuration file.
102 Configures support for device
104 Additional parameters may be passed to specify I/O configuration
105 settings (most often for
108 .Bl -tag -width ".Ar iomem"
110 specifies a bus to which the device is attached.
112 specifies the start address of I/O ports to be used by the device.
114 specifies the number of ports used by the device.
116 is the interrupt line number to be used.
118 specifies the physical memory address used by the device.
120 specifies the physical memory size used by the device.
122 sets various flag bits for the device.
128 Sets the kernel identification string to
134 The system is to run on the machine type
136 This is a legacy keyword and must be set to
139 .It Sy machine_arch Xo
142 The system is to run on the machine architecture
144 The only legal architecture is
147 .It Sy makeoptions Xo
156 in the kernel Makefile.
163 variable in the kernel.
166 .Ar name Ns Bq Ar =value
170 Some options expect to be assigned a value, which may be an integer,
171 a double-quoted word, a bare word, or an empty string
173 Note that those are eventually handled by the C compiler, so the rules
174 of that language apply.
175 .\"For more information see the
182 Sets the platform of this kernel to
188 meaning either a 32 bit
190 architecture or a virtual kernel.
192 .It Sy pseudo-device Xo
196 Includes support for the pseudo-device
198 Some pseudo-devices can have multiple or
204 .Bl -tag -width ".Pa /sys/config/GENERIC"
205 .It Pa /sys/config/LINT
206 description of kernel configuration options
207 .It Pa /sys/config/GENERIC
208 default kernel configuration file
217 manual page first appeared in