diff --git a/share/man/man7/build.7 b/share/man/man7/build.7
index 62c24eaed0dc..9d311a2f2f6c 100644
--- a/share/man/man7/build.7
+++ b/share/man/man7/build.7
@@ -1,891 +1,874 @@
 .\" Copyright (c) 2000
 .\"	Mike W. Meyer
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" modification, are permitted provided that the following conditions
 .\" are met:
 .\" 1. Redistributions of source code must retain the above copyright
 .\"    notice, this list of conditions and the following disclaimer.
 .\" 2. Redistributions in binary form must reproduce the above copyright
 .\"    notice, this list of conditions and the following disclaimer in the
 .\"    documentation and/or other materials provided with the distribution.
 .\"
 .\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 .\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE
 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
 .\" $FreeBSD$
 .\"
-.Dd May 15, 2021
+.Dd July 1, 2021
 .Dt BUILD 7
 .Os
 .Sh NAME
 .Nm build
 .Nd General instructions on how to build the system
 .Sh DESCRIPTION
 The sources for the
 .Fx
 system and its applications are contained in three different directories,
 normally
 .Pa /usr/src ,
 .Pa /usr/doc ,
 and
 .Pa /usr/ports .
 These directories may be initially empty or non-existent until updated with
 Git
 .Po installed from packages with
 .Xr pkg 7
 or from
 .Xr ports 7 Pc .
 Directory
 .Pa /usr/src
 contains the
 .Dq "base system"
 sources, which is loosely defined as the things required to rebuild
 the system to a useful state.
 Directory
 .Pa /usr/doc
 contains the source for the system documentation, excluding the manual
 pages.
 Directory
 .Pa /usr/ports
 contains a tree that provides a consistent interface for building and
 installing third party applications.
 For more information about the ports build process, see
 .Xr ports 7 .
 .Pp
 The
 .Xr make 1
 command is used in each of these directories to build and install the
 things in that directory.
 Issuing the
 .Xr make 1
 command in any directory issues the
 .Xr make 1
 command recursively in all subdirectories.
 With no target specified, the items in the directories are built
 and no further action is taken.
 .Pp
 A source tree is allowed to be read-only.
 As described in
 .Xr make 1 ,
 objects are usually built in a separate object directory hierarchy
 specified by the environment variable
 .Va MAKEOBJDIRPREFIX ,
 or under
 .Pa /usr/obj
 if variable
 .Va MAKEOBJDIRPREFIX
 is not set.
 The canonical object directory is described in the documentation for the
 .Cm buildworld
 target below.
 .Pp
 The build may be controlled by defining
 .Xr make 1
 variables described in the
 .Sx ENVIRONMENT
 section below, and by the variables documented in
 .Xr make.conf 5 .
 .Pp
 The default components included in the build are specified in the file
 .Pa /etc/src.conf
 in the source tree.
 To override the default file, include the SRCCONF option in the make steps,
 pointing to a custom src.conf file.
 For more information see
 .Xr src.conf 5 .
 .Pp
 The following list provides the names and actions for the targets
 supported by the build system:
 .Bl -tag -width ".Cm cleandepend"
 .It Cm analyze
 Run Clang static analyzer against all objects and present output on stdout.
 .It Cm check
 Run tests for a given subdirectory.
 The default directory used is
 .Pa ${.OBJDIR} ,
 but the check directory can be changed with
 .Pa ${CHECKDIR} .
 .It Cm checkworld
 Run the
 .Fx
 test suite on installed world.
 .It Cm clean
 Remove any files created during the build process.
 .It Cm cleandepend
 Remove the
 .Pa ${.OBJDIR}/${DEPENDFILE}*
 files generated by prior
 .Dq Li "make"
 and
 .Dq Li "make depend"
 steps.
 .It Cm cleandir
 Remove the canonical object directory if it exists, or perform
 actions equivalent to
 .Dq Li "make clean cleandepend"
 if it does not.
 This target will also remove an
 .Pa obj
 link in
 .Pa ${.CURDIR}
 if that exists.
 .Pp
 It is advisable to run
 .Dq Li "make cleandir"
 twice: the first invocation will remove the canonical object directory
 and the second one will clean up
 .Pa ${.CURDIR} .
 .It Cm depend
 Generate a list of build dependencies in file
 .Pa ${.OBJDIR}/${DEPENDFILE} .
 Per-object dependencies are generated at build time and stored in
 .Pa ${.OBJDIR}/${DEPENDFILE}.${OBJ} .
 .It Cm install
 Install the results of the build to the appropriate location in the
 installation directory hierarchy specified in variable
 .Va DESTDIR .
 .It Cm obj
 Create the canonical object directory associated with the current
 directory.
 .It Cm objlink
 Create a symbolic link to the canonical object directory in
 .Pa ${.CURDIR} .
 .It Cm tags
 Generate a tags file using the program specified in the
 .Xr make 1
 variable
 .Va CTAGS .
 The build system supports
 .Xr ctags 1
 and
 .Nm "GNU Global" .
 .El
 .Pp
 The other supported targets under directory
 .Pa /usr/src
 are:
 .Bl -tag -width ".Cm distributeworld"
 .It Cm buildenv
 Spawn an interactive shell with environment variables set up for
 building the system or individual components.
 For cross-building the target architecture needs to be specified with
 .Xr make 1
 variables
 .Va TARGET_ARCH
 and
 .Va TARGET .
 .Pp
 This target is only useful after a complete toolchain (including
 the compiler, linker, assembler, headers and libraries) has been
 built; see the
 .Cm toolchain
 target below.
 .It Cm buildworld
 Build everything but the kernel, configure files in
 .Pa etc ,
 and
 .Pa release .
 The object directory can be changed from the default
 .Pa /usr/obj
 by setting the
 .Pa MAKEOBJDIRPREFIX
 .Xr make 1
 variable.
 The actual build location prefix used
 depends on the
 .Va WITH_UNIFIED_OBJDIR
 option from
 .Xr src.conf 5 .
 If enabled it is
 .Pa ${MAKEOBJDIRPREFIX}${.CURDIR}/${TARGET}.${TARGET_ARCH}
 for all builds.
 If disabled it is
 .Pa ${MAKEOBJDIRPREFIX}${.CURDIR}
 for native builds, and
 .Pa ${MAKEOBJDIRPREFIX}/${TARGET}.${TARGET_ARCH}${.CURDIR}
 for cross builds and native builds with variable
 .Va CROSS_BUILD_TESTING
 set.
 .It Cm cleanworld
 Attempt to clean up targets built by a preceding
 .Cm buildworld ,
 or similar step built from this source directory.
 .It Cm cleanuniverse
 When
 .Va WITH_UNIFIED_OBJDIR
 is enabled, attempt to clean up targets built by a preceding
 .Cm buildworld ,
 .Cm universe ,
 or similar step, for any architecture built from this source directory.
 .It Cm distributeworld
 Distribute everything compiled by a preceding
 .Cm buildworld
 step.
 Files are placed in the directory hierarchy specified by
 .Xr make 1
 variable
 .Va DISTDIR .
 This target is used while building a release; see
 .Xr release 7 .
 .It Cm native-xtools
 This target builds a cross-toolchain for the given
 .Sy TARGET
 and
 .Sy TARGET_ARCH ,
 as well as a select list of static userland tools for the host system.
 This is intended to be used in a jail where QEMU is used to improve
 performance by avoiding emulating binaries that do not need to be emulated.
 .Sy TARGET
 and
 .Sy TARGET_ARCH
 should be defined.
 .It Cm native-xtools-install
 Installs the results to
 .Pa ${DESTDIR}/${NXTP}
 where
 .Va NXTP
 defaults to
 .Pa nxb-bin .
 .Sy TARGET
 and
 .Sy TARGET_ARCH
 must be defined.
 .It Cm packageworld
 Archive the results of
 .Cm distributeworld ,
 placing the results in
 .Va DISTDIR .
 This target is used while building a release; see
 .Xr release 7 .
 .It Cm installworld
 Install everything built by a preceding
 .Cm buildworld
 step into the directory hierarchy pointed to by
 .Xr make 1
 variable
 .Va DESTDIR .
 .Pp
 If installing onto an NFS file system and running
 .Xr make 1
 with the
 .Fl j
 option, make sure that
 .Xr rpc.lockd 8
 is running on both client and server.
 See
 .Xr rc.conf 5
 on how to make it start at boot time.
 .It Cm toolchain
 Create the build toolchain needed to build the rest of the system.
 For cross-architecture builds, this step creates a cross-toolchain.
 .It Cm universe
 For each architecture,
 execute a
 .Cm buildworld
 followed by a
 .Cm buildkernel
 for all kernels for that architecture,
 including
 .Pa LINT .
 This command takes a long time.
 .It Cm kernels
 Like
 .Cm universe
 with
 .Va WITHOUT_WORLDS
 defined so only the kernels for each architecture are built.
 .It Cm worlds
 Like
 .Cm universe
 with
 .Va WITHOUT_KERNELS
 defined so only the worlds for each architecture are built.
-.It Cm update
-Get updated sources as configured in
-.Xr make.conf 5 .
 .It Cm targets
 Print a list of supported
 .Va TARGET
 /
 .Va TARGET_ARCH
 pairs for world and kernel targets.
 .It Cm tinderbox
 Execute the same targets as
 .Cm universe .
 In addition print a summary of all failed targets at the end and
 exit with an error if there were any.
 .It Cm toolchains
 Create a build toolchain for each architecture supported by the build system.
 .It Cm xdev
 Builds and installs a cross-toolchain and sysroot for the given
 .Sy TARGET
 and
 .Sy TARGET_ARCH .
 The sysroot contains target library and headers.
 The target is an alias for
 .Cm xdev-build
 and
 .Cm xdev-install .
 The location of the files installed can be controlled with
 .Va DESTDIR .
 The target location in
 .Va DESTDIR
 is
 .Pa ${DESTDIR}/${XDTP}
 where
 .Va XDTP
 defaults to
 .Pa /usr/${XDDIR}
 and
 .Va XDDIR
 defaults to
 .Pa ${TARGET_ARCH}-freebsd .
 .It Cm xdev-build
 Builds for the
 .Cm xdev
 target.
 .It Cm xdev-install
 Installs the files for the
 .Cm xdev
 target.
 .It Cm xdev-links
 Installs autoconf-style symlinks to
 .Pa ${DESTDIR}/usr/bin
 pointing into the xdev toolchain in
 .Pa ${DESTDIR}/${XDTP} .
 .El
 .Pp
 Kernel specific build targets in
 .Pa /usr/src
 are:
 .Bl -tag -width ".Cm distributekernel"
 .It Cm buildkernel
 Rebuild the kernel and the kernel modules.
 The object directory can be changed from the default
 .Pa /usr/obj
 by setting the
 .Pa MAKEOBJDIRPREFIX
 .Xr make 1
 variable.
 .It Cm installkernel
 Install the kernel and the kernel modules to directory
 .Pa ${DESTDIR}/boot/kernel ,
 renaming any pre-existing directory with this name to
 .Pa kernel.old
 if it contained the currently running kernel.
 The target directory under
 .Pa ${DESTDIR}
 may be modified using the
 .Va INSTKERNNAME
 and
 .Va KODIR
 .Xr make 1
 variables.
 .It Cm distributekernel
 Install the kernel to the directory
 .Pa ${DISTDIR}/kernel/boot/kernel .
 This target is used while building a release; see
 .Xr release 7 .
 .It Cm packagekernel
 Archive the results of
 .Cm distributekernel ,
 placing the results in
 .Va DISTDIR .
 This target is used while building a release; see
 .Xr release 7 .
 .It Cm kernel
 Equivalent to
 .Cm buildkernel
 followed by
 .Cm installkernel
 .It Cm kernel-toolchain
 Rebuild the tools needed for kernel compilation.
 Use this if you did not do a
 .Cm buildworld
 first.
 .It Cm reinstallkernel
 Reinstall the kernel and the kernel modules, overwriting the contents
 of the target directory.
 As with the
 .Cm installkernel
 target, the target directory can be specified using the
 .Xr make 1
 variable
 .Va INSTKERNNAME .
 .El
 .Pp
 Convenience targets for cleaning up the install destination directory
 denoted by variable
 .Va DESTDIR
 include:
 .Bl -tag -width ".Cm delete-old-libs"
 .It Cm check-old
 Print a list of old files and directories in the system.
 .It Cm delete-old
 Delete obsolete base system files and directories interactively.
 When
 .Li -DBATCH_DELETE_OLD_FILES
 is specified at the command line, the delete operation will be
 non-interactive.
 The variables
 .Va DESTDIR ,
 .Va TARGET_ARCH
 and
 .Va TARGET
 should be set as with
 .Dq Li "make installworld" .
 .It Cm delete-old-libs
 Delete obsolete base system libraries interactively.
 This target should only be used if no third party software uses these
 libraries.
 When
 .Li -DBATCH_DELETE_OLD_FILES
 is specified at the command line, the delete operation will be
 non-interactive.
 The variables
 .Va DESTDIR ,
 .Va TARGET_ARCH
 and
 .Va TARGET
 should be set as with
 .Dq Li "make installworld" .
 .El
 .Sh ENVIRONMENT
 Variables that influence all builds include:
 .Bl -tag -width ".Va MAKEOBJDIRPREFIX"
 .It Va DEBUG_FLAGS
 Defines a set of debugging flags that will be used to build all userland
 binaries under
 .Pa /usr/src .
 When
 .Va DEBUG_FLAGS
 is defined, the
 .Cm install
 and
 .Cm installworld
 targets install binaries from the current
 .Va MAKEOBJDIRPREFIX
 without stripping,
 so that debugging information is retained in the installed binaries.
 .It Va DESTDIR
 The directory hierarchy prefix where built objects will be installed.
 If not set,
 .Va DESTDIR
 defaults to the empty string.
 .It Va MAKEOBJDIRPREFIX
 Defines the prefix for directory names in the tree of built objects.
 Defaults to
 .Pa /usr/obj
 if not defined.
 This variable should only be set in the environment or
 .Pa /etc/src-env.conf
 and not via
 .Pa /etc/make.conf
 or
 .Pa /etc/src.conf
 or the command line.
 .It Va WITHOUT_WERROR
 If defined, compiler warnings will not cause the build to halt,
 even if the makefile says otherwise.
 .It Va WITH_CTF
 If defined, the build process will run the DTrace CTF conversion
 tools on built objects.
 .El
 .Pp
 Additionally, builds in
 .Pa /usr/src
 are influenced by the following
 .Xr make 1
 variables:
 .Bl -tag -width ".Va SUBDIR_OVERRIDE"
 .It Va KERNCONF
 Overrides which kernel to build and install for the various kernel
 make targets.
 It defaults to
 .Cm GENERIC .
 .It Va KERNCONFDIR
 Overrides the directory in which
 .Va KERNCONF
 and any files included by
 .Va KERNCONF
 should be found.
 Defaults to
 .Pa sys/${ARCH}/conf .
 .It Va KERNFAST
 If set, the build target
 .Cm buildkernel
 defaults to setting
 .Va NO_KERNELCLEAN ,
 .Va NO_KERNELCONFIG ,
 and
 .Va NO_KERNELOBJ .
 When set to a value other than
 .Cm 1
 then
 .Va KERNCONF
 is set to the value of
 .Va KERNFAST .
 .It Va LOCAL_DIRS
 If set, this variable supplies a list of additional directories relative to
 the root of the source tree to build as part of the
 .Cm everything
 target.
 The directories are built in parallel with each other,
 and with the base system directories.
 Insert a
 .Va .WAIT
 directive at the beginning of the
 .Va LOCAL_DIRS
 list to ensure all base system directories are built first.
 .Va .WAIT
 may also be used as needed elsewhere within the list.
 .It Va LOCAL_ITOOLS
 If set, this variable supplies a list of additional tools that are used by the
 .Cm installworld
 and
 .Cm distributeworld
 targets.
 .It Va LOCAL_LIB_DIRS
 If set, this variable supplies a list of additional directories relative to
 the root of the source tree to build as part of the
 .Cm libraries
 target.
 The directories are built in parallel with each other,
 and with the base system libraries.
 Insert a
 .Va .WAIT
 directive at the beginning of the
 .Va LOCAL_DIRS
 list to ensure all base system libraries are built first.
 .Va .WAIT
 may also be used as needed elsewhere within the list.
 .It Va LOCAL_MTREE
 If set, this variable supplies a list of additional mtrees relative to the
 root of the source tree to use as part of the
 .Cm hierarchy
 target.
 .It Va LOCAL_LEGACY_DIRS
 If set, this variable supplies a list of additional directories relative to
 the root of the source tree to build as part of the
 .Cm legacy
 target.
 .It Va LOCAL_BSTOOL_DIRS
 If set, this variable supplies a list of additional directories relative to
 the root of the source tree to build as part of the
 .Cm bootstrap-tools
 target.
 .It Va LOCAL_TOOL_DIRS
 If set, this variable supplies a list of additional directories relative to
 the root of the source tree to build as part of the
 .Cm build-tools
 target.
 .It Va LOCAL_XTOOL_DIRS
 If set, this variable supplies a list of additional directories relative to
 the root of the source tree to build as part of the
 .Cm cross-tools
 target.
 .It Va PORTS_MODULES
 A list of ports with kernel modules that should be built and installed
 as part of the
 .Cm buildkernel
 and
 .Cm installkernel
 process.
 .Bd -literal -offset indent
 make PORTS_MODULES=emulators/virtualbox-ose-kmod kernel
 .Ed
 .It Va SRCCONF
 Specify a file to override the default
 .Pa /etc/src.conf .
 The src.conf file controls the components to build.
 See
 .Xr src.conf 5
 .It Va STRIPBIN
 Command to use at install time when stripping binaries.
 Be sure to add any additional tools required to run
 .Va STRIPBIN
 to the
 .Va LOCAL_ITOOLS
 .Xr make 1
 variable before running the
 .Cm distributeworld
 or
 .Cm installworld
 targets.
 See
 .Xr install 1
 for more details.
 .It Va SUBDIR_OVERRIDE
 Override the default list of sub-directories and only build the
 sub-directory named in this variable.
 If combined with
 .Cm buildworld
 then all libraries and includes, and some of the build tools will still build
 as well.
 Specifying
 .Cm -DNO_LIBS ,
 and
 .Cm -DWORLDFAST
 will only build the specified directory as was done historically.
 When combined with
 .Cm buildworld
 it is necesarry to override
 .Va LOCAL_LIB_DIRS
 with any custom directories containing libraries.
 This allows building a subset of the system in the same way as
 .Cm buildworld
 does using its sysroot handling.
 This variable can also be useful when debugging failed builds.
 .Bd -literal -offset indent
 make some-target SUBDIR_OVERRIDE=foo/bar
 .Ed
 .It Va SYSDIR
 Specify the location of the kernel source to override the default
 .Pa /usr/src/sys .
 The kernel source is located in the
 .Pa sys
 subdirectory of the source tree checked out from the
 .Pa src.git
 repository.
 .It Va TARGET
 The target hardware platform.
 This is analogous to the
 .Dq Nm uname Fl m
 output.
 This is necessary to cross-build some target architectures.
 For example, cross-building for ARM64 machines requires
 .Va TARGET_ARCH Ns = Ns Li aarch64
 and
 .Va TARGET Ns = Ns Li arm64 .
 If not set,
 .Va TARGET
 defaults to the current hardware platform, unless
 .Va TARGET_ARCH
 is also set, in which case it defaults to the appropriate
 value for that architecture.
 .It Va TARGET_ARCH
 The target machine processor architecture.
 This is analogous to the
 .Dq Nm uname Fl p
 output.
 Set this to cross-build for a different architecture.
 If not set,
 .Va TARGET_ARCH
 defaults to the current machine architecture, unless
 .Va TARGET
 is also set, in which case it defaults to the appropriate
 value for that platform.
 Typically, one only needs to set
 .Va TARGET .
 .El
 .Pp
 Builds under directory
 .Pa /usr/src
 are also influenced by defining one or more of the following symbols,
 using the
 .Fl D
 option of
 .Xr make 1 :
 .Bl -tag -width ".Va -DNO_KERNELCONFIG"
 .It Va LOADER_DEFAULT_INTERP
 Defines what interpreter the default loader program will have.
 Valid values include
 .Dq 4th ,
 .Dq lua ,
 and
 .Dq simp .
 This creates the default link for
 .Pa /boot/loader
 to the loader with that interpreter.
 It also determines what interpreter is compiled into
 .Pa userboot .
 .It Va NO_CLEANDIR
 If set, the build targets that clean parts of the object tree use the
 equivalent of
 .Dq make clean
 instead of
 .Dq make cleandir .
 .It Va NO_CLEAN
 If set, no object tree files are cleaned at all.
 This is the default when
 .Va WITH_META_MODE
 is used with
 .Xr filemon 4
 loaded.
 See
 .Xr src.conf 5
 for more details.
 Setting
 .Va NO_CLEAN
 implies
 .Va NO_KERNELCLEAN ,
 so when
 .Va NO_CLEAN
 is set no kernel objects are cleaned either.
 .It Va NO_CTF
 If set, the build process does not run the DTrace CTF conversion tools
 on built objects.
 .It Va NO_SHARE
 If set, the build does not descend into the
 .Pa /usr/src/share
 subdirectory (i.e., manual pages, locale data files, timezone data files and
 other
 .Pa /usr/src/share
 files will not be rebuild from their sources).
 .It Va NO_KERNELCLEAN
 If set, the build process does not run
 .Dq make clean
 as part of the
 .Cm buildkernel
 target.
 .It Va NO_KERNELCONFIG
 If set, the build process does not run
 .Xr config 8
 as part of the
 .Cm buildkernel
 target.
 .It Va NO_KERNELOBJ
 If set, the build process does not run
 .Dq make obj
 as part of the
 .Cm buildkernel
 target.
-.It Va NO_DOCUPDATE
-If set, the update process does not update the source of the
-.Fx
-documentation as part of the
-.Dq make update
-target.
 .It Va NO_LIBS
 If set, the libraries phase will be skipped.
 .It Va NO_OBJWALK
 If set, no object directories will be created.
 This should only be used if object directories were created in a
 previous build and no new directories are connected.
-.It Va NO_PORTSUPDATE
-If set, the update process does not update the Ports tree as part of the
-.Dq make update
-target.
-.It Va NO_WWWUPDATE
-If set, the update process does not update the www tree as part of the
-.Dq make update
-target.
 .It Va WORLDFAST
 If set, the build target
 .Cm buildworld
 defaults to setting
 .Va NO_CLEAN ,
 .Va NO_OBJWALK ,
 and will skip most bootstrap phases.
 It will only bootstrap libraries and build all of userland.
 This option should be used only when it is known that none of the bootstrap
 needs changed and that no new directories have been connected to the build.
 .El
 .Pp
 Builds under directory
 .Pa /usr/doc
 are influenced by the following
 .Xr make 1
 variables:
 .Bl -tag -width ".Va DOC_LANG"
 .It Va DOC_LANG
 If set, restricts the documentation build to the language subdirectories
 specified as its content.
 The default action is to build documentation for all languages.
 .El
 .Pp
 Builds using the
 .Cm universe
 and related targets are influenced by the following
 .Xr make 1
 variables:
 .Bl -tag -width ".Va MAKE_JUST_KERNELS"
 .It Va JFLAG
 Pass the value of this variable to each
 .Xr make 1
 invocation used to build worlds and kernels.
 This can be used to enable multiple jobs within a single architecture's build
 while still building each architecture serially.
 .It Va MAKE_JUST_KERNELS
 Only build kernels for each supported architecture.
 .It Va MAKE_JUST_WORLDS
 Only build worlds for each supported architecture.
 .It Va WITHOUT_WORLDS
 Only build kernels for each supported architecture.
 .It Va WITHOUT_KERNELS
 Only build worlds for each supported architecture.
 .It Va UNIVERSE_TARGET
 Execute the specified
 .Xr make 1
 target for each supported architecture instead of the default action of
 building a world and one or more kernels.
 This variable implies
 .Va WITHOUT_KERNELS .
 .It Va TARGETS
 Only build the listed targets instead of each supported architecture.
 .It Va EXTRA_TARGETS
 In addition to the supported architectures, build the semi-supported
 architectures.
 A semi-supported architecture has build support in the
 .Fx
 tree, but receives significantly less testing and is generally for
 fringe uses that do not have a wide appeal.
 .El
 .Sh FILES
 .Bl -tag -width ".Pa /usr/share/examples/etc/make.conf" -compact
 .It Pa /usr/doc/Makefile
 .It Pa /usr/doc/share/mk/doc.project.mk
 .It Pa /usr/ports/Mk/bsd.port.mk
 .It Pa /usr/ports/Mk/bsd.sites.mk
 .It Pa /usr/share/examples/etc/make.conf
 .It Pa /usr/src/Makefile
 .It Pa /usr/src/Makefile.inc1
 .El
 .Sh EXAMPLES
 For an
 .Dq approved
 method of updating your system from the latest sources, please see the
 .Sx COMMON ITEMS
 section in
 .Pa src/UPDATING .
 .Pp
 The following sequence of commands can be used to cross-build the
 system for the armv6 architecture on an amd64 host:
 .Bd -literal -offset indent
 cd /usr/src
 make TARGET_ARCH=armv6 buildworld buildkernel
 make TARGET_ARCH=armv6 DESTDIR=/clients/arm installworld installkernel
 .Ed
 .Sh HISTORY
 The
 .Nm
 manpage first appeared in
 .Fx 4.3 .
 .Sh SEE ALSO
 .Xr cc 1 ,
 .Xr install 1 ,
 .Xr make 1 ,
 .Xr make.conf 5 ,
 .Xr src.conf 5 ,
 .Xr arch 7 ,
 .Xr pkg 7 ,
 .Xr ports 7 ,
 .Xr release 7 ,
 .Xr tests 7 ,
 .Xr config 8 ,
 .Xr etcupdate 8 ,
 .Xr mergemaster 8 ,
 .Xr reboot 8 ,
 .Xr shutdown 8
 .Sh AUTHORS
 .An Mike W. Meyer Aq Mt mwm@mired.org