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CONFIG(8)               NetBSD System Manager's Manual               CONFIG(8)


NAME

     config - build kernel compilation directories


SYNOPSIS

     config [-b builddir] [-s srcdir] [-p] [config-file]


DESCRIPTION

     config creates a kernel build directory from the file config-file, which
     describes the system to configure.

     There are several different ways to run the config program.  The tradi-
     tional way is to run config from the conf subdirectory of the machine-
     specific directory of the system source (usually /sys/arch/MACHINE/conf,
     where MACHINE is one of vax, tahoe, hp300, and so forth), and to specify
     as the config-file the name of a file located in that directory.  config
     will by default create files in the directory ../compile/SYSTEMNAME,
     where SYSTEMNAME is the last path component of config-file. config will
     assume that the top-level kernel source directory is located four direc-
     tories above the build directory.

     Another way is to create the build directory yourself, place the configu-
     ration file in the build directory with the name CONFIG, and run config
     from within the build directory without specifying a config-file. config
     will then by default create files in the current directory.  If you run
     config this way, you must specify the location of the top-level kernel
     source directory using the -s option or by using the ``source'' directive
     at the beginning of the system configuration file.

     Finally, you can specify the build directory for config and run it from
     anywhere.  You can specify a build directory with the -b option or by us-
     ing the ``build'' directive at the beginning of the system configuration
     file.  You must specify the location of the top-level kernel source di-
     rectory if you specify a build directory.

     If the -p option is supplied, .PROF is appended to the default compila-
     tion directory name, and config acts as if the lines ``makeoptions
     PROF="-pg"'' and ``options GPROF'' appeared in the configuration file.
     This will build a system that includes profiling code; see kgmon(8) and
     gprof(1).  The -p flag is expected to be used for ``one-shot'' profiles
     of existing systems; for regular profiling, it is probably wiser to make
     a separate configuration containing the makeoptions line.

     The old undocumented -g flag is no longer supported.  Instead, use
     ``makeoptions DEBUG="-g"'' and (typically) ``options KGDB''.

     The output of config consists of a number of files, principally ioconf.c,
     a description of I/O devices that may be attached to the system; and a
     Makefile, used by make(1) in building the kernel.

     After running config, it is wise to run ``make depend'' in the directory
     where the new makefile was created.  config prints a reminder of this
     when it completes.

     If config stops due to errors, the problems reported should be corrected
     and config should be run again.  config 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.


SEE ALSO

     The SYNOPSIS portion of each device in section 4.


     Building 4.4 BSD Systems with Config.

     options(4)


HISTORY

     The config command appeared in 4.1BSD. It was completely revised in
     4.4BSD.

4th Berkeley Distribution       April 19, 1994                               2