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BUILD(7)             BSD Miscellaneous Information Manual             BUILD(7)

     build -- information on how to build the system

     The source for the FreeBSD system and applications are contained in three
     different directories, normally /usr/src, /usr/doc, and /usr/ports.
     /usr/src contains the ``base system'' sources, which is loosely defined
     as the things required to rebuild the system to a useful state.  /usr/doc
     contains the source for the system documentation, excluding the manual
     pages.  /usr/ports is a tree that provides a consistent interface for
     building and installing third party applications.

     The make(1) command is used in each of these directories to build and
     install the things in that directory.  Issuing the make(1) command in any
     directory or subdirectory of those directories has the same effect as
     issuing the same command in all subdirectories of that directory.  With
     no target specified, the things in that directory are just built.  The
     following list provides the names and actions for other targets:

     clean       Removes any files created during the build process.

     install     Installs the results of the build for this directory.

     update      Gets updated sources as configured in /etc/make.conf.

     The other /usr/src make targets are:

     buildworld  Rebuild everything but the kernel, configure files in /etc,
                 and release.

                 Install everything built by buildworld.

                 Rebuild the kernel and the kernel modules.

                 Install the kernel and the kernel modules.

                 Reinstall the kernel and the kernel modules.

     kernel      Equivalent to buildkernel followed by installkernel

     For more information about the ports build process, see ports(7).

     TARGET_ARCH  The target machine processor architecture.  This is analo-
                  gous to the ``uname -p'' output.  Set this to cross-build
                  for a different architecture.

     TARGET       The target hardware platform.  This is analogous to the
                  ``uname -m'' output.  This is necessary to cross-build some
                  target architectures.  For example, cross-building for PC98
                  machines requires TARGET_ARCH=i386 and TARGET=pc98.

     NO_WERROR    If defined, warnings will not cause the build to halt, even
                  if the makefile says otherwise.

     DESTDIR      The directory hierarchy where the resulting binaries will be


     For an ``approved'' method of updating your system from the latest
     sources, please see the COMMON ITEMS section in src/UPDATING.

     The following sequence of commands can be used to cross-build the system
     for the Alpha architecture on an i386 host:

           cd /usr/src
           make TARGET_ARCH=alpha buildworld
           make TARGET_ARCH=alpha DESTDIR=/clients/axp installworld

     cc(1), install(1), make(1), make.conf(5), ports(7), release(7),
     config(8), mergemaster(8), reboot(8), shutdown(8)

     Mike W. Meyer <mwmATmired.org>.

BSD                            February 23, 2005                           BSD