 @@ -1,1319 +1,1314 @@
 BUILDING(8)                 System Manager's Manual                BUILDING(8)
 NAME
      BUILDING - Procedure for building NetBSD from source code
 REQUIREMENTS
      NetBSD is designed to be buildable on most POSIX-compliant host systems.
      The basic build procedure is the same whether compiling natively (on the
      same NetBSD architecture) or cross compiling (on another architecture or
      OS).
      This source tree contains a special subtree, "tools", which uses the host
      system to create a build toolchain for the target architecture.  The host
      system must have at least C and C++ compilers in order to create the
      toolchain (make is not required); all other tools are created as part of
      the NetBSD build process.  (See the Environment variables section below
      if you need to override or manually select your compilers.)
 FILES
    Source tree layout
      BUILDING       This document (in plaintext).  Generated from
                     doc/BUILDING.mdoc.
      Makefile       The main Makefile for NetBSD; should only be run for
                     native builds with an appropriately up-to-date version of
                     NetBSD make(1).  Intended for expert use with knowledge of
                     its shortcomings, it has been superseded by the build.sh
                     shell script as the recommended means for building NetBSD.
      UPDATING       Special notes for updating from an earlier revision of
                     NetBSD.  It is important to read this file before every
                     build of an updated source tree.
      build.sh       Bourne-compatible shell script used for building the host
                     build tools and the NetBSD system from scratch.  Can be
                     used for both native and cross builds, and should be used
                     instead of make(1) as it performs additional checks to
                     prevent common issues going undetected, such as building
                     with an outdated version of make(1).
      crypto/dist/, dist/, gnu/dist/
                     Sources imported verbatim from third parties, without
                     mangling the existing build structure.  Other source trees
                     in bin through usr.sbin use the NetBSD make(1) "reachover"
                     Makefile semantics when building these programs for a
                     native host.
      distrib/, etc/
                     Sources for items used when making a full release
                     snapshot, such as files installed in DESTDIR/etc on the
                     destination system, boot media, and release notes.
      doc/BUILDING.mdoc
                     This document, in -mdoc troff format; the original copy.
                     Used to generate BUILDING.
      external, sys/external
                     Sources and build infrastructure for components imported
                     (mostly) unchanged from upstream maintainers, sorted by
                     applicable license.  This is (slowly) replacing the
                     crypto/dist, dist, and gnu/dist directories.
      external/mit/xorg/
                     "Reachover" build structure for modular Xorg; the source
                     is in X11SRCDIR.
      regress/, tests/
                     Regression test harness.  Can be cross-compiled, but only
                     run natively.  tests/ uses the atf(7) test framework;
                     regress/ contains older tests that have not yet been
                     migrated to atf(7).
      sys/           NetBSD kernel sources.
      tools/         "Reachover" build structure for the host build tools.
                     This has a special method of determining out-of-date
                     status.
      tools/compat/README
                     Special notes for cross-hosting a NetBSD build on non-
                     NetBSD platforms.
      Other directories including bin/ ... usr.sbin/
                     Sources to the NetBSD userland (non-kernel) programs.  If
                     any of these directories are missing, they will be skipped
                     during the build.
    Build tree layout
      The NetBSD build tree is described in hier(7), and the release layout is
      described in release(7).
 CONFIGURATION
    Environment variables
      Several environment variables control the behaviour of NetBSD builds.
      HOST_CC         Path name to C compiler used to create the toolchain.
      HOST_CFLAGS     Flags passed to the host C compiler.
      HOST_CXX        Path name to C++ compiler used to create the toolchain.
      HOST_CXXFLAGS   Flags passed to the host C++ compiler.
      HOST_SH         Path name to a shell available on the host system and
                      suitable for use during the build.  The NetBSD build
                      system requires a modern Bourne-like shell with POSIX-
                      compliant features, and also requires support for the
                      "local" keyword to declare local variables in shell
                      functions (which is a widely-implemented but non-
                      standardised feature).
                      Depending on the host system, a suitable shell may be
                      /bin/sh, /usr/xpg4/bin/sh, /bin/ksh (provided it is a
                      variant of ksh that supports the "local" keyword, such as
                      ksh88, but not ksh93), or /usr/local/bin/bash.
                      Most parts of the build require HOST_SH to be an absolute
                      path; however, build.sh allows it to be a simple command
                      name, which will be converted to an absolute path by
                      searching the PATH.
      INSTALLBOOT_UBOOT_PATHS
                      A colon-separated list of search paths used by
                      installboot(8) to find U-Boot packages.
      MACHINE         Machine type, e.g., "macppc".
      MACHINE_ARCH    Machine architecture, e.g., "powerpc".
      MAKE            Path name to invoke make(1) as.
      MAKECONF        The name of the make(1) configuration file.  See "make"
                      variables and mk.conf(5).
                      Note: Only settable in the process environment.
                      Default: "/etc/mk.conf"
      MAKEFLAGS       Flags to invoke make(1) with.
                      Note: build.sh ignores the value of MAKEFLAGS passed in
                      the environment, but allows MAKEFLAGS to be set via the
                      -V option.
      MAKEOBJDIR      Directory to use as the .OBJDIR for the current
                      directory.  The value is subjected to variable expansion
                      by make(1).  Typical usage is to set this variable to a
                      value involving the use of `${.CURDIR:S...}' or
                      `${.CURDIR:C...}', to derive the value of .OBJDIR from
                      the value of .CURDIR.  Used only if MAKEOBJDIRPREFIX is
                      not defined.
                      Note: MAKEOBJDIR can be provided only in the environment
                      or via the -O flag of build.sh; it cannot usefully be set
                      inside a Makefile, including in mk.conf(5) or MAKECONF.
      MAKEOBJDIRPREFIX
                      Top level directory of the object directory tree.  The
                      value is subjected to variable expansion by make(1).
                      build.sh will create the ${MAKEOBJDIRPREFIX} directory if
                      necessary, but if make(1) is used without build.sh, then
                      rules in <bsd.obj.mk> will abort the build if the
                      ${MAKEOBJDIRPREFIX} directory does not exist.  If the
                      value is defined and valid, then
                      ${MAKEOBJDIRPREFIX}/${.CURDIR} is used as the .OBJDIR for
                      the current directory.  The current directory may be read
                      only.
                      Note: MAKEOBJDIRPREFIX can be provided only in the
                      environment or via the -M flag of build.sh; it cannot
                      usefully be set inside a Makefile, including in
                      mk.conf(5) or MAKECONF.
      TMPDIR          Top-level directory to store temporary directories used
                      by build.sh before paths to other directories such as
                      .OBJDIR can be determined.
                      Note: Must support execution of binaries.  I.e., without
                      mount(8)'s -o noexec option.
                      Default: "/tmp".
    "make" variables
      Several variables control the behavior of NetBSD builds.  Unless
      otherwise specified, these variables may be set in either the process
      environment or the make(1) configuration file mk.conf(5) specified by
      MAKECONF.
      This list is not comprehensive; all supported variables and their
      defaults are documented in mk.conf(5).
      BSDOBJDIR       The real path to the object directory tree for the NetBSD
                      source tree.
                      Default: "/usr/obj"
      BSDSRCDIR       The real path to the NetBSD source tree, if NETBSDSRCDIR
                      isn't defined.
                      Default: "/usr/src"
      BUILDID         Identifier for the build.  If set, this should be a short
                      string that is suitable for use as part of a file or
                      directory name.  The identifier will be appended to
                      object directory names, and can be consulted in the
                      make(1) configuration file in order to set additional
                      build parameters, such as compiler flags.  It will also
                      be used as part of the kernel version string, which can
                      be shown by "uname -v".
                      Default: Unset.
      BUILDINFO       Optional multi-line string containing information about
                      the build.  This will appear in DESTDIR/etc/release, and
                      it will be stored in the buildinfo variable in any
                      kernels that are built.  When such kernels are booted,
                      the sysctl(7) kern.buildinfo variable will report this
                      value.  The string may contain backslash escape
                      sequences, such as "\\" (representing a backslash
                      character) and "\n" (representing a newline).
                      Default: Unset.
      BUILDSEED       g++(1) uses random numbers when compiling C++ code.  This
                      variable seeds the g++(1) random number generator using
                      -frandom-seed with this value.  By default, it is set to
                      "NetBSD-(majorversion)".  Using a fixed value causes C++
                      binaries to be the same when built from the same sources,
                      resulting in identical (reproducible) builds.  Additional
                      information is available in the g++(1) documentation of
                      -frandom-seed.
                      Default: Unset.
      CPUFLAGS        Additional flags to the compiler/assembler to select CPU
                      instruction set options, CPU tuning options, etc.
                      Default: Unset.
      DESTDIR         Directory to contain the built NetBSD system.  If set,
                      special options are passed to the compilation tools to
                      prevent their default use of the host system's
                      /usr/include, /usr/lib, and so forth.  This pathname must
                      be an absolute path, and should not end with a slash (/)
                      character.  (For installation into the system's root
                      directory, set DESTDIR to an empty string, not to "/").
                      The directory must reside on a file system which supports
                      long file names and hard links.
                      Note: build.sh will provide a default of destdir.MACHINE
                      (in the top-level .OBJDIR) unless run in `expert' mode.
                      Default: Empty string if USETOOLS is "yes"; unset
                      otherwise.
      EXTERNAL_TOOLCHAIN
                      If defined, this variable indicates the root directory of
                      an external toolchain which will be used to build the
                      tree.  For example, if a platform is a TOOLCHAIN_MISSING
                      platform, EXTERNAL_TOOLCHAIN can be used to re-enable the
                      cross-compile framework.
                      If EXTERNAL_TOOLCHAIN is defined, act as MKGCC=no, since
                      the external version of the compiler may not be able to
                      build the library components of the in-tree compiler.
                      This variable should be used in conjunction with an
                      appropriate HAVE_GCC or HAVE_LLVM setting to control the
                      compiler flags.
                      Note: This variable is not yet used in as many places as
                      it should be.  Expect the exact semantics of this
                      variable to change in the short term as parts of the
                      cross-compile framework continue to be cleaned up.
                      Default: Unset.
      MAKEVERBOSE     Level of verbosity of status messages.  Supported values:
 No descriptive messages or commands executed by
                          make(1) are shown.
 Brief messages are shown describing what is being
                          done, but the actual commands executed by make(1) are
                          not shown.
 Descriptive messages are shown as above (prefixed
                          with a `#'), and ordinary commands performed by
                          make(1) are shown.
 In addition to the above, all commands performed by
                          make(1) are shown, even if they would ordinarily have
                          been hidden through use of the "@" prefix in the
                          relevant makefile.
 In addition to the above, commands executed by
                          make(1) are traced through use of the sh(1) "-x"
                          flag.
                      Default: 2
      MKCATPAGES      Can be set to "yes" or "no".  Indicates whether
                      preformatted plaintext manual pages will be created and
                      installed.
                      Forced to "no" if MKMAN=no or MKSHARE=no.
                      Default: "no"
      MKCROSSGDB      Can be set to "yes" or "no".  Create a cross-gdb as a
                      host tool.
                      Default: "no"
      MKDEBUG         Can be set to "yes" or "no".  Indicates whether debug
                      information should be generated for all userland
                      binaries.  The result is collected as an additional
                      debug.tgz and xdebug.tgz set and installed in
                      DESTDIR/usr/libdata/debug.
                      Forced to "no" if NODEBUG is defined, usually in the
                      Makefile before any make(1) .include directives.
                      Default: "no"
      MKDEBUGKERNEL   Can be set to "yes" or "no".  Indicates whether debugging
                      symbols will be built for kernels by default; pretend as
                      if makeoptions DEBUG="-g" is specified in kernel
                      configuration files.  This will also put the debug kernel
                      netbsd.gdb in the kernel sets.  See options(4) for
                      details.  This is useful if a cross-gdb is built as well
                      (see MKCROSSGDB).
                      Default: "no"
      MKDEBUGLIB      Can be set to "yes" or "no".  Indicates whether debug
                      libraries (lib*_g.a) will be built and installed.  Debug
                      libraries are compiled with "-g -DDEBUG".
                      Forced to "no" if NODEBUGLIB is defined, usually in the
                      Makefile before any make(1) .include directives.
                      Default: "no"
      MKDEBUGTOOLS    Can be set to "yes" or "no".  Indicates whether debug
                      information (lib*_g.a) will be included in the build
                      toolchain.
                      Default: "no"
      MKDOC           Can be set to "yes" or "no".  Indicates whether system
                      documentation destined for DESTDIR/usr/share/doc will be
                      installed.
                      Forced to "no" if NODOC is defined, usually in the
                      Makefile before any make(1) .include directives.
                      Forced to "no" if MKSHARE=no.
                      Default: "yes"
      MKHOSTOBJ       Can be set to "yes" or "no".  If set to "yes", then for
                      programs intended to be run on the compile host, the
                      name, release, and architecture of the host operating
                      system will be suffixed to the name of the object
                      directory created by "make obj".  (This allows multiple
                      host systems to compile NetBSD for a single target.)  If
                      set to "no", then programs built to be run on the compile
                      host will use the same object directory names as programs
                      built to be run on the target.
                      Default: "no"
      MKHTML          Can be set to "yes" or "no".  Indicates whether the HTML
                      manual pages are created and installed.  and installed
                      Forced to "no" if NOHTML is defined, usually in the
                      Makefile before any make(1) .include directives.
                      Forced to "no" if MKMAN=no or MKSHARE=no.
                      Default: "yes"
      MKINFO          Can be set to "yes" or "no".  Indicates whether GNU Info
                      files, used for the documentation for most of the
                      compilation tools, will be built and installed.
                      Forced to "no" if NOINFO is defined, usually in the
                      Makefile before any make(1) .include directives.
                      Forced to "no" if MKSHARE=no.
                      Default: "yes"
      MKKDEBUG        Deprecated, use MKDEBUGKERNEL.
      MKKMOD          Can be set to "yes" or "no".  Indicates whether kernel
                      modules are built and installed.
                      Default: "no" on or1k; "yes" on other platforms.
      MKLINKLIB       Can be set to "yes" or "no".  Indicates whether all of
                      the shared library infrastructure will be built and
                      installed.  If "no", prevents: installation of the *.a
                      libraries, installation of the *_pic.a libraries on PIC
                      systems, building of *.a libraries on PIC systems, or
                      installation of .so symlinks on ELF systems.
                      Forced to "no" if NOLINKLIB is defined, usually in the
                      Makefile before any make(1) .include directives.
                      If "no", acts as MKLINT=no MKPICINSTALL=no MKPROFILE=no.
                      Default: "yes"
      MKLINT          Can be set to "yes" or "no".  Indicates whether lint(1)
                      will be run against portions of the NetBSD source code
                      during the build, and whether lint libraries will be
                      installed into DESTDIR/usr/libdata/lint.
                      Forced to "no" if NOLINT is defined, usually in the
                      Makefile before any make(1) .include directives.
                      Forced to "no" if MKLINKLIB=no.
                      Default: "no"
      MKMAN           Can be set to "yes" or "no".  Indicates whether manual
                      pages will be installed.
                      Forced to "no" if NOMAN is defined, usually in the
                      Makefile before any make(1) .include directives.
                      Forced to "no" if MKSHARE=no.
                      If "no", acts as MKCATPAGES=no MKHTML=no.
                      Default: "yes"
      MKNLS           Can be set to "yes" or "no".  Indicates whether Native
                      Language System (NLS) locale zone files will be built and
                      installed.
                      Forced to "no" if NONLS is defined, usually in the
                      Makefile before any make(1) .include directives.
                      Forced to "no" if MKSHARE=no.
                      Default: "yes"
      MKOBJ           Can be set to "yes" or "no".  Indicates whether object
                      directories will be created when running "make obj".  If
                      set to "no", then all built files will be located inside
                      the regular source tree.
                      Forced to "no" if NOOBJ is defined, usually in the
                      Makefile before any make(1) .include directives.
                      If "no", acts as MKOBJDIRS=no.
                      Note: Setting MKOBJ to "no" is not recommended and may
                      cause problems when updating the tree with cvs(1).
                      Default: "yes"
      MKOBJDIRS       Can be set to "yes" or "no".  Indicates whether object
                      directories will be created automatically (via a "make
                      obj" pass) at the start of a build.
                      Forced to "no" if MKOBJ=no.
                      Default: "no"
      MKPIC           Can be set to "yes" or "no".  Indicates whether shared
                      objects and libraries will be created and installed.  If
                      "no", the entire built system will be statically linked.
                      Forced to "no" if NOPIC is defined, usually in the
                      Makefile before any make(1) .include directives.
                      If "no", acts as MKPICLIB=no.
                      Default: "no" on m68000; "yes" on other platforms.
      MKPICINSTALL    Can be set to "yes" or "no".  Indicates whether the ar(1)
                      format libraries (lib*_pic.a), used to generate shared
                      libraries, are installed.
                      Forced to "no" if NOPICINSTALL is defined, usually in the
                      Makefile before any make(1) .include directives.
                      Forced to "no" if MKLINKLIB=no.
                      Default: "no"
      MKPROFILE       Can be set to "yes" or "no".  Indicates whether profiled
                      libraries (lib*_p.a) will be built and installed.
                      Forced to "no" if NOPROFILE is defined, usually in the
                      Makefile before any make(1) .include directives.
                      Forced to "no" if MKLINKLIB=no.
                      Default: "no" on or1k, riscv32, and riscv64 (due to
                      toolchain problems with profiled code); "yes" on other
                      platforms.
      MKREPRO         Can be set to "yes" or "no".  Indicates whether builds
                      are to be reproducible.  If "yes", two builds from the
                      same source tree will produce the same build results.
                      Used as the default for MKARZERO.
                      This may be set to "yes" by giving build.sh the -P
                      option.
                      Default: "no" Can be set to "yes" or "no".
      MKREPRO_TIMESTAMP
                      Unix timestamp.  When MKREPRO is set, the timestamp of
                      all files in the sets will be set to this value.
                      This may be set automatically to the latest source tree
                      timestamp using cvslatest(1) by giving build.sh the -P
                      option.
                      Default: Unset.
      MKSHARE         Can be set to "yes" or "no".  Indicates whether files
                      destined to reside in DESTDIR/usr/share will be built and
                      installed.
                      Forced to "no" if NOSHARE is defined, usually in the
                      Makefile before any make(1) .include directives.
                      If "no", acts as MKCATPAGES=no MKDOC=no MKINFO=no
                      MKHTML=no MKMAN=no MKNLS=no.
                      Default: "yes"
      MKSTRIPIDENT    Can be set to "yes" or "no".  Indicates whether RCS IDs,
                      for use with ident(1), should be stripped from program
                      binaries and shared libraries.
                      Default: "no"
      MKSTRIPSYM      Can be set to "yes" or "no".  Indicates whether all local
                      symbols should be stripped from shared libraries.  If
                      "yes", strip all local symbols from shared libraries; the
                      affect is equivalent to the -x option of ld(1).  If "no",
                      strip only temporary local symbols; the affect is
                      equivalent to the -X option of ld(1).  Keeping non-
                      temporary local symbols such as static function names is
                      useful on using DTrace for userland libraries and getting
                      a backtrace from a rump kernel loading shared libraries.
                      Default: "yes"
      MKUNPRIVED      Can be set to "yes" or "no".  Indicates whether an
                      unprivileged install will occur.  The user, group,
                      permissions, and file flags, will not be set on the
                      installed items; instead the information will be appended
                      to a file called METALOG in DESTDIR.  The contents of
                      METALOG are used during the generation of the
                      distribution tar files to ensure that the appropriate
                      file ownership is stored.
                      Default: "no"
      MKUPDATE        Can be set to "yes" or "no".  Indicates whether all
                      install operations intended to write to DESTDIR will
                      compare file timestamps before installing, and skip the
                      install phase if the destination files are up-to-date.
                      Note: This also has implications on full builds (see next
                      subsection).
                      Default: "no"
      MKX11           Can be set to "yes" or "no".  Indicates whether X11 is
                      built and installed from X11SRCDIR, and whether the X
                      sets will be created.
                      Note: If "yes", requires MKINET6=yes.
                      Default: "no"
      NETBSDSRCDIR    The path to the top level of the NetBSD sources.
                      Default: Top level of the NetBSD source tree (as
                      determined by the presence of build.sh and tools/) if
                      make(1) is run from within that tree; otherwise BSDSRCDIR
                      will be used.
      TOOLCHAIN_MISSING
                      Can be set to "yes" or "no".  If not "no", this indicates
                      that the platform "MACHINE_ARCH" being built does not
                      have a working in-tree toolchain.
                      If not "no", acts as MKBINUTILS=no MKGCC=no MKGDB=no.
                      Default: "no"
      TOOLDIR         Directory to hold the host tools, once built.  If
                      specified, must be an absolute path.  This directory
                      should be unique to a given host system and NetBSD source
                      tree.  (However, multiple targets may share the same
                      TOOLDIR; the target-dependent files have unique names.)
                      If unset, a default based on the uname(1) information of
                      the host platform will be created in the .OBJDIR of src.
                      Default: Unset.
      USETOOLS        Can be set to "yes" or "no".  Indicates whether the tools
                      specified by TOOLDIR should be used as part of a build in
                      progress.  Must be set to "yes" if cross-compiling.
                      yes    Use the tools from TOOLDIR.
                      no     Do not use the tools from TOOLDIR, but refuse to
                             build native compilation tool components that are
                             version-specific for that tool.
                      never  Do not use the tools from TOOLDIR, even when
                             building native tool components.  This is similar
                             to the traditional NetBSD build method, but does
                             not verify that the compilation tools in use are
                             up-to-date enough in order to build the tree
                             successfully.  This may cause build or runtime
                             problems when building the whole NetBSD source
                             tree.
                      Default: "no" when using <bsd.*.mk> outside the NetBSD
                      source tree (detected automatically) or if
                      TOOLCHAIN_MISSING=yes; "yes" otherwise.
      X11SRCDIR       Directory containing the modular Xorg source.  If
                      specified, must be an absolute path.  The main modular
                      Xorg source is found in X11SRCDIR/external/mit.
                      Default: NETBSDSRCDIR/../xsrc, if that exists; otherwise
                      /usr/xsrc.
    "make" variables for full builds
      These variables only affect the top level "Makefile" and do not affect
      manually building subtrees of the NetBSD source code.
      INSTALLBOOT_BOARDS
                      A list of boards to create bootable images for.  If
                      corresponding U-Boot packages are installed, bootable
                      images are created as part of a release.  See the
                      -o board=name option of installboot(8).
      INSTALLWORLDDIR
                      Location for the "make installworld" target to install
                      to.  If specified, must be an absolute path.
                      Default: "/"
      MKOBJDIRS       Can be set to "yes" or "no".  Indicates whether object
                      directories will be created automatically (via a "make
                      obj" pass) at the start of a build.
                      Default: "no"
                      If using build.sh, the default is "yes".  This may be set
                      back to "no" by giving build.sh the -o option.
      MKUPDATE        Can be set to "yes" or "no".  If set, then in addition to
                      the effects described for MKUPDATE=yes above, this
                      implies the effects of NOCLEANDIR (i.e., "make cleandir"
                      is avoided).
                      Default: "no"
                      If using build.sh, this may be set by giving the -u
                      option.
      NBUILDJOBS      Now obsolete.  Use the make(1) option -j, instead.  See
                      below.
                      Default: Unset.
      NOCLEANDIR      If set, avoids the "make cleandir" phase of a full build.
                      This has the effect of allowing only changed files in a
                      source tree to be recompiled.  This can speed up builds
                      when updating only a few files in the tree.
                      Default: Unset.
                      See also MKUPDATE.
      NODISTRIBDIRS   If set, avoids the "make distrib-dirs" phase of a full
                      build.  This skips running mtree(8) on DESTDIR, useful on
                      systems where building as an unprivileged user, or where
                      it is known that the system-wide mtree files have not
                      changed.
                      Default: Unset.
      NOINCLUDES      If set, avoids the "make includes" phase of a full build.
                      This has the effect of preventing make(1) from thinking
                      that some programs are out-of-date simply because the
                      system include files have changed.  However, this option
                      should not be used when updating the entire NetBSD source
                      tree arbitrarily; it is suggested to use MKUPDATE=yes
                      instead in that case.
                      Default: Unset.
      RELEASEDIR      If set, specifies the directory to which a release(7)
                      layout will be written at the end of a "make release".
                      If specified, must be an absolute path.
                      Note: build.sh will provide a default of releasedir (in
                      the top-level .OBJDIR) unless run in `expert' mode.
                      Default: Unset.
 BUILDING
    "make" command line options
      This is not a summary of all the options available to make(1); only the
      options used most frequently with NetBSD builds are listed here.
      -j njob    Run up to njob make(1) subjobs in parallel.  Makefiles should
                 use .WAIT or have explicit dependencies as necessary to
                 enforce build ordering.
      -m dir     Specify the default directory for searching for system
                 Makefile segments, mainly the <bsd.*.mk> files.  When building
                 any full NetBSD source tree, this should be set to the
                 "share/mk" directory in the source tree.  This is set
                 automatically when building from the top level, or when using
                 build.sh.
      -n         Show the commands that would have been executed, but do not
                 actually execute them.  This will still cause recursion to
                 take place.
      -V var     Show make(1)'s idea of the value of var.  Does not build any
                 targets.
      var=value  Set the variable var to value, overriding any setting
                 specified by the process environment, the MAKECONF
                 configuration file, or the system Makefile segments.
    "make" targets
      These default targets may be built by running make(1) in any subtree of
      the NetBSD source code.  It is recommended that none of these be used
      from the top level Makefile; as a specific exception, "make obj" and
      "make cleandir" are useful in that context.
      all        Build programs, libraries, and preformatted documentation.
      clean      Remove program and library object code files.
      cleandir   Same as clean, but also remove preformatted documentation,
                 dependency files generated by "make depend", and any other
                 files known to be created at build time.
      depend     Create dependency files (.depend) containing more detailed
                 information about the dependencies of source code on header
                 files.  Allows programs to be recompiled automatically when a
                 dependency changes.
      dependall  Does a "make depend" immediately followed by a "make all".
                 This improves cache locality of the build since both passes
                 read the source files in their entirety.
      distclean  Synonym for cleandir.
      includes   Build and install system header files.  Typically needed
                 before any system libraries or programs can be built.
      install    Install programs, libraries, and documentation into DESTDIR.
                 Few files will be installed to DESTDIR/dev, DESTDIR/etc,
                 DESTDIR/root or DESTDIR/var in order to prevent user supplied
                 configuration data from being overwritten.
      lint       Run lint(1) against the C source code, where appropriate, and
                 generate system-installed lint libraries.
      obj        Create object directories to be used for built files, instead
                 of building directly in the source tree.
      tags       Create ctags(1) searchable function lists usable by the ex(1)
                 and vi(1) text editors.
    "make" targets for the top level
      Additional make(1) targets are usable specifically from the top source
      level to facilitate building the entire NetBSD source tree.
      build         Build the entire NetBSD system (except the kernel).  This
                    orders portions of the source tree such that prerequisites
                    will be built in the proper order.
      distribution  Do a "make build", and then install a full distribution
                    (which does not include a kernel) into DESTDIR, including
                    files in DESTDIR/dev, DESTDIR/etc, DESTDIR/root and
                    DESTDIR/var.
      buildworld    As per "make distribution", except that it ensures that
                    DESTDIR is not the root directory.
      installworld  Install the distribution from DESTDIR to INSTALLWORLDDIR,
                    which defaults to the root directory.  Ensures that
                    INSTALLWORLDDIR is not the root directory if cross
                    compiling.
                    The INSTALLSETS environment variable may be set to a space-
                    separated list of distribution sets to be installed.  By
                    default, all sets except "etc" and "xetc" are installed, so
                    most files in INSTALLWORLDDIR/etc will not be installed or
                    modified.
                    Note: Before performing this operation with
                    INSTALLWORLDDIR=/, it is highly recommended that you
                    upgrade your kernel and reboot.  After performing this
                    operation, it is recommended that you use etcupdate(8) to
                    update files in INSTALLWORLDDIR/etc, and postinstall(8) to
                    check for or fix inconsistencies.
      sets          Create distribution sets from DESTDIR into
                    RELEASEDIR/RELEASEMACHINEDIR/binary/sets.  Should be run
                    after "make distribution", as "make build" alone does not
                    install all of the required files.
      sourcesets    Create source sets of the source tree into
                    RELEASEDIR/source/sets.
      syspkgs       Create syspkgs from DESTDIR into
                    RELEASEDIR/RELEASEMACHINEDIR/binary/syspkgs.  Should be run
                    after "make distribution", as "make build" alone does not
                    install all of the required files.
      release       Do a "make distribution", build kernels, distribution
                    media, and install sets (this as per "make sets"), and then
                    package the system into a standard release layout as
                    described by release(7).  This requires that RELEASEDIR be
                    set (see above).
      iso-image     Create a NetBSD installation CD-ROM image in the
                    RELEASEDIR/images directory.  The CD-ROM file system will
                    have a layout as described in release(7).
                    For most machine types, the CD-ROM will be bootable, and
                    will automatically run the sysinst(8) menu-based
                    installation program, which can be used to install or
                    upgrade a NetBSD system.  Bootable CD-ROMs also contain
                    tools that may be useful in repairing a damaged NetBSD
                    installation.
                    Before "make iso-image" is attempted, RELEASEDIR must be
                    populated by "make release" or equivalent.
                    Note: Other, smaller, CD-ROM images may be created in the
                    RELEASEDIR/RELEASEMACHINEDIR/installation/cdrom directory
                    by "make release".  These smaller images usually contain
                    the same tools as the larger images in RELEASEDIR/images,
                    but do not contain additional content such as the
                    distribution sets.
                    Note: The mac68k port still uses an older method of
                    creating CD-ROM images.  This requires the mkisofs(1)
                    utility, which is not part of NetBSD, but which can be
                    installed from pkgsrc/sysutils/cdrtools.
      iso-image-source
                    Create a NetBSD installation CD-ROM image in the
                    RELEASEDIR/images directory.  The CD-ROM file system will
                    have a layout as described in release(7).  It will have top
                    level directories for the machine type and source.
                    For most machine types, the CD-ROM will be bootable, and
                    will automatically run the sysinst(8) menu-based
                    installation program, which can be used to install or
                    upgrade a NetBSD system.  Bootable CD-ROMs also contain
                    tools that may be useful in repairing a damaged NetBSD
                    installation.
                    Before "make iso-image-source" is attempted, RELEASEDIR
                    must be populated by "make sourcesets release" or
                    equivalent.
                    Note: Other, smaller, CD-ROM images may be created in the
                    RELEASEDIR/RELEASEMACHINEDIR/installation/cdrom directory
                    by "make release".  These smaller images usually contain
                    the same tools as the larger images in RELEASEDIR/images,
                    but do not contain additional content such as the
                    distribution sets.
                    Note: The mac68k port still uses an older method of
                    creating CD-ROM images.  This requires the mkisofs(1)
                    utility, which is not part of NetBSD, but which can be
                    installed from pkgsrc/sysutils/cdrtools.
      install-image
                    Create a bootable NetBSD installation disk image in the
                    RELEASEDIR/images directory.  The installation disk image
                    is suitable for copying to bootable USB flash memory
                    sticks, etc., for machines which are able to boot from such
                    devices.  The file system in the bootable disk image will
                    have a layout as described in release(7).
                    The installation image is bootable, and will automatically
                    run the sysinst(8) menu-based installation program, which
                    can be used to install or upgrade a NetBSD system.  The
                    image also contains tools that may be useful in repairing a
                    damaged NetBSD installation.
                    Before "make install-image" is attempted, RELEASEDIR must
                    be populated by "make release" or equivalent.  The build
                    must have been performed with MKUNPRIVED=yes because "make
                    install-image" relies on information in DESTDIR/METALOG.
      live-image    Create NetBSD live images in the RELEASEDIR/images
                    directory.  The live image contains all necessary files to
                    boot NetBSD up to multi-user mode, including all files
                    which should be extracted during installation, NetBSD
                    disklabel, bootloaders, etc.
                    The live image is suitable for use as a disk image in
                    virtual machine environments such as QEMU, and also useful
                    to boot NetBSD from a USB flash memory stick on a real
                    machine, without the need for installation.
                    Before "make live-image" is attempted, RELEASEDIR must be
                    populated by "make release" or equivalent.  The build must
                    have been performed with MKUNPRIVED=yes because "make
                    install-image" relies on information in DESTDIR/METALOG.
      regression-tests
                    Can only be run after building the regression tests in the
                    directory "regress".  Runs those compiled regression tests
                    on the local host.
                    Note: Most tests are now managed instead using atf(7); this
                    target should probably run those as well but currently does
                    not.
    The "build.sh" script
      This script file is a shell script designed to build the entire NetBSD
      system on any host with a suitable modern shell and some common
      utilities.  The required shell features are described under the HOST_SH
      variable.
      If a host system's default shell does support the required features, then
      we suggest that you explicitly specify a suitable shell using a command
      like
            /path/to/suitable/shell build.sh [options]
      The above command will usually enable build.sh to automatically set
      HOST_SH=/path/to/suitable/shell, but if that fails, then the following
      set of commands may be used instead:
            HOST_SH=/path/to/suitable/shell
            export HOST_SH
            ${HOST_SH} build.sh [options]
      If build.sh detects that it is being executed under an unsuitable shell,
      it attempts to exec a suitable shell instead, or shows an error message.
      If HOST_SH is not set explicitly, then build.sh sets a default using
      heuristics dependent on the host platform, or from the shell under which
      build.sh is executed (if that can be determined), or using the first copy
      of sh found in PATH.
      All cross-compile builds, and most native builds, of the entire system
      should make use of build.sh rather than just running "make".  This way,
      the make(1) program will be bootstrapped properly, in case the host
      system has an older or incompatible "make" program.
      When compiling the entire system via build.sh, many make(1) variables are
      set for you in order to help encapsulate the build process.  In the list
      of options below, variables that are automatically set by build.sh are
      noted where applicable.
      The following operations are supported by build.sh:
      build         Build the system as per "make build".  Before the main part
                    of the build commences, this command runs the obj operation
                    (unless the -o option is given), "make cleandir" (unless
                    the -u option is given), and the tools operation.
      distribution  Build a full distribution as per "make distribution".  This
                    command first runs the build operation.
      release       Build a full release as per "make release".  This command
                    first runs the distribution operation.
      help          Show a help message, and exit.
      makewrapper   Create the nbmake-MACHINE wrapper.  This operation is
                    automatically performed for any of the other operations.
      cleandir      Perform "make cleandir".
      obj           Perform "make obj".
      tools         Build and install the host tools from src/tools.  This
                    command will first run "make obj" and "make cleandir" in
                    the tools subdirectory unless the -o or -u options
                    (respectively) are given.
      install=idir  Install the contents of DESTDIR to idir, using "make
                    installworld".
                    Note: Files that are part of the "etc" or "xetc" sets will
                    not be installed, unless overridden by the INSTALLSETS
                    environment variable.
      kernel=kconf  Build a new kernel.  The kconf argument is the name of a
                    configuration file suitable for use by config(1).  If kconf
                    does not contain any `/' characters, the configuration file
                    is expected to be found in the KERNCONFDIR directory, which
                    is typically sys/arch/MACHINE/conf.  The new kernel will be
                    built in a subdirectory of KERNOBJDIR, which is typically
                    sys/arch/MACHINE/compile or an associated object directory.
                    This command does not imply the tools command; run the
                    tools command first unless it is certain that the tools
                    already exist and are up to date.
                    This command will run "make cleandir" on the kernel in
                    question first unless the -u option is given.
      kernel.gdb=kconf
                    Build a new kernel with debug information.  Similar to the
                    above kernel=kconf operation, but creates a netbsd.gdb file
                    alongside of the kernel netbsd, which contains a full
                    symbol table and can be used for debugging (for example
                    with a cross-gdb built by MKCROSSGDB).
      kernels       This command will build all kernels defined in port
                    specific release build procedure.
                    This command internally calls the kernel=kconf operation
                    for each found kernel configuration file.
      modules       This command will build kernel modules and install them
                    into DESTDIR.
      releasekernel=kconf
                    Install a gzip(1)ed copy of the kernel previously built by
                    kernel=kconf into
                    RELEASEDIR/RELEASEMACHINEDIR/binary/kernel, usually as
                    netbsd-kconf.gz, although the "netbsd" prefix is determined
                    from the "config" directives in kconf.
      sets          Perform "make sets".
      sourcesets    Perform "make sourcesets".
      syspkgs       Perform "make syspkgs".
      iso-image     Perform "make iso-image".
      iso-image-source
                    Perform "make iso-image-source".
      install-image
                    Perform "make install-image".
      live-image    Perform "make live-image".
      list-arch     Show a list of valid MACHINE and MACHINE_ARCH settings, the
                    default MACHINE_ARCH for each MACHINE, and aliases for
                    MACHINE/MACHINE_ARCH pairs, and then exits.  The -m or -a
                    options (or both) may be used to specify glob patterns that
                    will be used to narrow the list of results; for example,
                    "build.sh -m 'evb*' -a '*arm*' list-arch" will list all
                    known MACHINE/MACHINE_ARCH values in which either MACHINE
                    or ALIAS matches the pattern `evb*', and MACHINE_ARCH
                    matches the pattern `*arm*'.
      The following command line options alter the behaviour of the build.sh
      operations described above:
      -a arch   Set the value of MACHINE_ARCH to arch.  See the -m option for
                more information.
      -B buildid
                Set the value of BUILDID to buildid.  This will also append the
                build identifier to the name of the "make" wrapper script so
                that the resulting name is of the form
                "nbmake-MACHINE-BUILDID".
      -C cdextras
                Append cdextras to the CDEXTRA variable, which is a space-
                separated list of files or directories that will be added to
                the CD-ROM image that may be create by the "iso-image" or
                "iso-image-source" operations.  Files will be added to the root
                of the CD-ROM image, whereas directories will be copied
                recursively.  If relative paths are specified, they will be
                converted to absolute paths before being used.  Multiple paths
                may be specified via multiple -C options, or via a single
                option whose argument contains multiple space-separated paths.
      -c compiler
                Select the compiler for the toolchain to build NetBSD and for
                inclusion in the NetBSD distribution.  Supported choices:
                      clang
                      gcc [default]
                The compiler used to build the toolchain can be different; see
                HOST_CC and HOST_CXX.
      -D dest   Set the value of DESTDIR to dest.  If a relative path is
                specified, it will be converted to an absolute path before
                being used.
      -E        Set `expert' mode.  This overrides various sanity checks, and
                allows: DESTDIR does not have to be set to a non-root path for
                builds, and MKUNPRIVED=yes does not have to be set when
                building as a non-root user.
                Note: It is highly recommended that you know what you are doing
                when you use this option.
      -h        Show a help message, and exit.
      -j njob   Run up to njob make(1) subjobs in parallel; passed through to
                make(1).  If you see failures for reasons other than running
                out of memory while using build.sh with -j, please save
                complete build logs so the failures can be analyzed.
                To achieve the fastest builds, -j values between (1 + the
                number of CPUs) and (2 * the number of CPUs) are recommended.
                Use lower values on machines with limited memory or I/O
                bandwidth.
      -M obj    Set MAKEOBJDIRPREFIX to obj.  Unsets MAKEOBJDIR.  See "-O obj"
                for more information.
                For instance, if the source directory is /usr/src, a setting of
                "-M /usr/obj" will place build-time files under
                /usr/obj/usr/src/bin, /usr/obj/usr/src/lib,
                /usr/obj/usr/src/usr.bin, and so forth.
                If a relative path is specified, it will be converted to an
                absolute path before being used.  build.sh imposes the
                restriction that the argument to the -M option must not begin
                with a "$" (dollar sign) character; otherwise it would be too
                difficult to determine whether the value is an absolute or a
                relative path.  If the directory does not already exist,
                build.sh will create it.
      -m mach   Set the value of MACHINE to mach, unless the mach argument is
                an alias that refers to a MACHINE/MACHINE_ARCH pair, in which
                case both MACHINE and MACHINE_ARCH are set from the alias.
                Such aliases are interpreted entirely by build.sh; they are not
                used by any other part of the build system.  The MACHINE_ARCH
                setting implied by mach will override any value of MACHINE_ARCH
                in the process environment, but will not override a value set
                by the -a option.  All cross builds require -m, but if unset on
                a NetBSD host, the host's value of MACHINE will be detected and
                used automatically.
                See the list-arch operation for a way to get a list of valid
                MACHINE and MACHINE_ARCH settings.
      -N noiselevel
                Set the "noisyness" level of the build, by setting MAKEVERBOSE
                to noiselevel.
      -n        Show the commands that would be executed by build.sh, but do
                not make any changes.  This is similar in concept to "make -n".
      -O obj    Create an appropriate transform macro for MAKEOBJDIR that will
                place the built object files under obj.  Unsets
                MAKEOBJDIRPREFIX.
                For instance, a setting of "-O /usr/obj" will place build-time
                files under /usr/obj/bin, /usr/obj/lib, /usr/obj/usr.bin, and
                so forth.
                If a relative path is specified, it will be converted to an
                absolute path before being used.  build.sh imposes the
                restriction that the argument to the -O option must not contain
                a "$" (dollar sign) character.  If the directory does not
                already exist, build.sh will create it.
                In normal use, exactly one of the -M or -O options should be
                specified.  If neither -M nor -O is specified, then a default
                object directory will be chosen according to rules in
                <bsd.obj.mk>.  Relying on this default is not recommended
                because it is determined by complex rules that are influenced
                by the values of several variables and by the location of the
                source directory.
                Note: Placing the obj directory location outside of the default
                source tree hierarchy makes it easier to manually clear out old
                files in the event the "make cleandir" operation is unable to
                do so.  (See CAVEATS below.)
                Note: The use of one of -M or -O is the only means of building
                multiple machine architecture userlands from the same source
                tree without cleaning between builds (in which case, one would
                specify distinct obj locations for each).
      -o        Set the value of MKOBJDIRS to "no".  Otherwise, it will be
                automatically set to "yes".  This default is opposite to the
                behaviour when not using build.sh.
      -P        Set the value of MKREPRO and MKREPRO_TIMESTAMP to the latest
                source CVS timestamp for reproducible builds.
      -R rel    Set the value of RELEASEDIR to rel.  If a relative path is
                specified, it will be converted to an absolute path before
                being used.
      -r        Remove the contents of DESTDIR and TOOLDIR before building
                (provides a clean starting point).  This will skip deleting
                DESTDIR if building on a native system to the root directory.
      -S seed   Change the value of BUILDSEED to seed.  This should rarely be
                necessary.
      -T tools  Set the value of TOOLDIR to tools.  If a relative path is
                specified, it will be converted to an absolute path before
                being used.  If set, the bootstrap "make" will only be rebuilt
                if the source files for make(1) have changed.
      -U        Set MKUNPRIVED=yes.
      -u        Set MKUPDATE=yes.
      -V var=[value]
                Set the environment variable var to an optional value.  This is
                propagated to the nbmake wrapper.
      -w wrapper
                Create the nbmake wrapper script (see below) in a custom
                location, specified by wrapper.  This allows, for instance, to
                place the wrapper in PATH automatically.
                Note: wrapper is the full name of the file, not just a
                directory name.  If a relative path is specified, it will be
                converted to an absolute path before being used.
      -X x11src
                Set the value of X11SRCDIR to x11src.  If a relative path is
                specified, it will be converted to an absolute path before
                being used.
      -x        Set MKX11=yes.
      -Z var    Unset ("zap") the environment variable var.  This is propagated
                to the nbmake wrapper.
      -?        Show a help message, and exit.
    The "nbmake-MACHINE" wrapper script
      If using the build.sh script to build NetBSD, a nbmake-MACHINE script
      will be created in TOOLDIR/bin upon the first build to assist in building
      subtrees on a cross-compile host.
      nbmake-MACHINE can be invoked in lieu of make(1), and will instead call
      the up-to-date version of "nbmake" installed into TOOLDIR/bin with
      several key variables pre-set, including MACHINE, MACHINE_ARCH, and
      TOOLDIR.  nbmake-MACHINE will also set variables specified with -V, and
      unset variables specified with -Z.
      This script can be symlinked into a directory listed in PATH, or called
      with an absolute path.
 EXAMPLES
 .   % ./build.sh [OPTIONS] tools kernel=GENERIC
           Build a new toolchain, and use the new toolchain to configure and
           build a new GENERIC kernel.
 .   % ./build.sh [OPTIONS] -U distribution
           Using unprivileged mode, build a complete distribution to a DESTDIR
           directory that build.sh selects (and will show).
 .   # ./build.sh [OPTIONS] -U install=/
           As root, install to / the distribution that was built by example 2.
           Even though this is run as root, -U is required so that the
           permissions stored in DESTDIR/METALOG are correctly applied to the
           files as they're copied to /.
 .   % ./build.sh [OPTIONS] -U -u release
           Using unprivileged mode, build a complete release to DESTDIR and
           RELEASEDIR directories that build.sh selects (and will show).
           MKUPDATE=yes (-u) is set to prevent the "make cleandir", so that if
           this is run after example 2, it doesn't need to redo that portion of
           the release build.
 OBSOLETE VARIABLES
-     NBUILDJOBS  Use the make(1) option -j instead.
+     NBUILDJOBS  Use the build.sh and make(1) option -j instead.
      USE_NEW_TOOLCHAIN
                  The new toolchain is now the default.  To disable, use
                  TOOLCHAIN_MISSING=yes.
 SEE ALSO
      ar(1), config(1), ctags(1), cvs(1), cvslatest(1), ex(1), g++(1), gzip(1),
      ident(1), ld(1), lint(1), make(1), mkisofs(1), sh(1), uname(1), vi(1),
      options(4), mk.conf(5), atf(7), hier(7), release(7), sysctl(7),
      etcupdate(8), installboot(8), mount(8), mtree(8), postinstall(8),
      sysinst(8), pkgsrc/sysutils/cdrtools
 HISTORY
      The build.sh based build scheme was introduced for NetBSD 1.6 as
      USE_NEW_TOOLCHAIN, and re-worked to TOOLCHAIN_MISSING after that.
 CAVEATS
      After significant updates to third-party components in the source tree,
      the "make cleandir" operation may be insufficient to clean out old files
      in object directories.  Instead, one may have to manually remove the
      files.  Consult the UPDATING file for notices concerning this.
-NetBSD                           June 5, 2023                           NetBSD
+NetBSD                           June 10, 2023                          NetBSD

 @@ -1,540 +1,537 @@
-#	$NetBSD: Makefile,v 1.336 2023/06/02 20:48:09 lukem Exp $
+#	$NetBSD: Makefile,v 1.337 2023/06/11 10:43:51 lukem Exp $
+#
 # This is the top-level makefile for building NetBSD. For an outline of
 # how to build a snapshot or release, as well as other release engineering
 # information, see http://www.NetBSD.org/developers/releng/index.html
+#
 # Not everything you can set or do is documented in this makefile. In
 # particular, you should review the files in /usr/share/mk (especially
 # bsd.README) for general information on building programs and writing
 # Makefiles within this structure, and see the comments in src/etc/Makefile
 # for further information on installation and release set options.
+#
 # Variables listed below can be set on the make command line (highest
 # priority), in /etc/mk.conf (middle priority), or in the environment
 # (lowest priority).
+#
 # Variables:
 #   DESTDIR is the target directory for installation of the compiled
 #	software. It defaults to /. Note that programs are built against
 #	libraries installed in DESTDIR.
 #   MKMAN, if `no', will prevent building of manual pages.
 #   MKOBJDIRS, if not `no', will build object directories at
 #	an appropriate point in a build.
 #   MKSHARE, if `no', will prevent building and installing
 #	anything in /usr/share.
 #   MKUPDATE, if not `no', will avoid a `make cleandir' at the start of
 #	`make build', as well as having the effects listed in
 #	/usr/share/mk/bsd.README.
 #   NOCLEANDIR, if defined, will avoid a `make cleandir' at the start
 #	of the `make build'.
 #   NOINCLUDES will avoid the `make includes' usually done by `make build'.
 #   NOBINARIES will not build binaries, only includes and libraries
+#
 #   See mk.conf(5) for more details.
+#
+#
 # Targets:
 #   build:
 #	Builds a full release of NetBSD in DESTDIR, except for the
 #	/etc configuration files.
 #	If BUILD_DONE is set, this is an empty target.
 #   distribution:
 #	Builds a full release of NetBSD in DESTDIR, including the /etc
 #	configuration files.
 #   buildworld:
 #	As per `make distribution', except that it ensures that DESTDIR
 #	is not the root directory.
 #   installworld:
 #	Install the distribution from DESTDIR to INSTALLWORLDDIR (which
 #	defaults to the root directory).  Ensures that INSTALLWORLDDIR
 #	is not the root directory if cross compiling.
 #   release:
 #	Does a `make distribution', and then tars up the DESTDIR files
 #	into ${RELEASEDIR}/${RELEASEMACHINEDIR}, in release(7) format.
 #	(See etc/Makefile for more information on this.)
 #   regression-tests:
 #	Runs the regression tests in "regress" on this host.
 #   sets:
 #	Populate ${RELEASEDIR}/${RELEASEMACHINEDIR}/binary/sets
 #	from ${DESTDIR}
 #   sourcesets:
 #	Populate ${RELEASEDIR}/source/sets from ${NETBSDSRCDIR}
 #   syspkgs:
 #	Populate ${RELEASEDIR}/${RELEASEMACHINEDIR}/binary/syspkgs
 #	from ${DESTDIR}
 #   iso-image:
 #	Create CD-ROM image in RELEASEDIR/images.
 #	RELEASEDIR must already have been populated by `make release'
 #	or equivalent.
 #   iso-image-source:
 #	Create CD-ROM image with source in RELEASEDIR/images.
 #	RELEASEDIR must already have been populated by
 #	`make release sourcesets' or equivalent.
 #   live-image:
 #	Create bootable live image for emulators or USB stick etc.
 #	in RELEASEDIR/liveimage.
 #	RELEASEDIR must already have been populated by `make release'
 #	or equivalent.
 #   install-image:
 #	Create bootable installation image for USB stick etc.
 #	in RELEASEDIR/installimage.
 #	RELEASEDIR must already have been populated by `make release'
 #	or equivalent.
+#
 # Targets invoked by `make build,' in order:
 #   cleandir:        cleans the tree.
 #   do-top-obj:      creates the top level object directory.
 #   do-tools-obj:    creates object directories for the host toolchain.
 #   do-tools:        builds host toolchain.
 #   params:          create params file with various make(1) parameters.
 #   show-params:     show various make(1) parameters.
 #   obj:             creates object directories.
 #   do-distrib-dirs: creates the distribution directories.
 #   includes:        installs include files.
 #   do-lib:          builds and installs prerequisites from lib.
 #   do-compat-lib:   builds and installs prerequisites from compat/lib
 #                    if ${MKCOMPAT} != "no".
 #   do-x11:          builds and installs X11 tools and libraries
 #                    from src/external/mit/xorg if ${MKX11} != "no".
 #   do-build:        builds and installs the entire system.
 #   do-obsolete:     installs the obsolete sets (for the postinstall-* targets).
+#
 .if ${.MAKEFLAGS:M${.CURDIR}/share/mk} == ""
 .MAKEFLAGS: -m ${.CURDIR}/share/mk
 .endif
+#
 # If _SRC_TOP_OBJ_ gets set here, we will end up with a directory that may
 # not be the top level objdir, because "make obj" can happen in the *middle*
 # of "make build" (long after <bsd.own.mk> is calculated it).  So, pre-set
 # _SRC_TOP_OBJ_ here so it will not be added to ${.MAKEOVERRIDES}.
+#
 _SRC_TOP_OBJ_=
 .include <bsd.own.mk>
+#
 # Sanity check: make sure that "make build" is not invoked simultaneously
 # with a standard recursive target.
+#
 .if make(build) || make(release) || make(snapshot)
 .for targ in ${TARGETS:Nobj:Ncleandir}
 .if make(${targ}) && !target(.BEGIN)
 .BEGIN:
 	@echo 'BUILD ABORTED: "make build" and "make ${targ}" are mutually exclusive.'
 	@false
 .endif
 .endfor
 .endif
+#
 # _SUBDIR is used to set SUBDIR, after removing directories that have
 # BUILD_${dir}=no, or that have no ${dir}/Makefile.
+#
 _SUBDIR=	tools .WAIT lib
 .if ${MKLLVM} != "no"
 _SUBDIR+=	external/bsd/compiler_rt
 .endif
 _SUBDIR+=	include external crypto/external bin
 _SUBDIR+=	games libexec sbin usr.bin
 _SUBDIR+=	usr.sbin share sys etc tests compat
 _SUBDIR+=	.WAIT rescue .WAIT distrib regress
 .for dir in ${_SUBDIR}
 .if "${dir}" == ".WAIT" \
 	|| (${BUILD_${dir}:Uyes} != "no" && exists(${dir}/Makefile))
 SUBDIR+=	${dir}
 .endif
 .endfor
 .if exists(regress)
 regression-tests: .PHONY .MAKE
 	@echo Running regression tests...
 	${MAKEDIRTARGET} regress regress
 .endif
 .if ${MKUNPRIVED} != "no"
 NOPOSTINSTALL=	# defined
 .endif
 afterinstall: .PHONY .MAKE
 .if ${MKMAN} != "no"
 	${MAKEDIRTARGET} share/man makedb
 .endif
 .if (${MKUNPRIVED} != "no" && ${MKINFO} != "no")
 	${MAKEDIRTARGET} external/gpl2/texinfo/bin/install-info infodir-meta
 .endif
 .if !defined(NOPOSTINSTALL)
 	${MAKEDIRTARGET} . postinstall-check
 .endif
 _POSTINSTALL=	${:!cd ${.CURDIR}/usr.sbin/postinstall && \
 			${MAKE} -v .OBJDIR!}/postinstall  \
 		-m ${MACHINE} -a ${MACHINE_ARCH}
 _POSTINSTALL_ENV= \
 	AWK=${TOOL_AWK:Q}		\
 	DB=${TOOL_DB:Q}			\
 	HOST_SH=${HOST_SH:Q}		\
 	MAKE=${MAKE:Q}			\
 	PWD_MKDB=${TOOL_PWD_MKDB:Q}	\
 	SED=${TOOL_SED:Q}		\
 	STAT=${TOOL_STAT:Q}
 .if ${MKX11} != "no"
 _POSTINSTALL_X11=-x ${X11SRCDIR:Q}
 .endif
 postinstall-check: .PHONY
 	@echo "   === Post installation checks ==="
 	${_POSTINSTALL_ENV} ${HOST_SH} ${_POSTINSTALL} -s ${.CURDIR} ${_POSTINSTALL_X11} -d ${DESTDIR}/ check; if [ $$? -gt 1 ]; then exit 1; fi
 	@echo "   ================================"
 postinstall-fix: .NOTMAIN .PHONY
 	@echo "   === Post installation fixes ==="
 	${_POSTINSTALL_ENV} ${HOST_SH} ${_POSTINSTALL} -s ${.CURDIR} ${_POSTINSTALL_X11} -d ${DESTDIR}/ fix
 	@echo "   ==============================="
 postinstall-fix-obsolete: .NOTMAIN .PHONY
 	@echo "   === Removing obsolete files ==="
 	${_POSTINSTALL_ENV} ${HOST_SH} ${_POSTINSTALL} -s ${.CURDIR} ${_POSTINSTALL_X11} -d ${DESTDIR}/ fix obsolete
 	@echo "   ==============================="
 postinstall-fix-obsolete_stand: .NOTMAIN .PHONY
 	@echo "   === Removing obsolete files ==="
 	${_POSTINSTALL_ENV} ${HOST_SH} ${_POSTINSTALL} -s ${.CURDIR} ${_POSTINSTALL_X11} -d ${DESTDIR}/ fix obsolete_stand
 	${_POSTINSTALL_ENV} ${HOST_SH} ${_POSTINSTALL} -s ${.CURDIR} ${_POSTINSTALL_X11} -d ${DESTDIR}/ fix obsolete_stand_debug
 	@echo "   ==============================="
+#
 # Targets (in order!) called by "make build".
+#
 BUILDTARGETS+=	check-tools
 .if ${MKUPDATE} == "no" && !defined(NOCLEANDIR)
 BUILDTARGETS+=	cleandir
 .endif
 .if ${MKOBJDIRS} != "no"
 BUILDTARGETS+=	do-top-obj
 .endif
 .if ${USETOOLS} == "yes"	# {
 .if ${MKOBJDIRS} != "no"
 BUILDTARGETS+=	do-tools-obj
 .endif
 BUILDTARGETS+=	do-tools
 .endif # USETOOLS		# }
 BUILDTARGETS+=	params
 .if ${MKOBJDIRS} != "no"
 BUILDTARGETS+=	obj
 .endif
 BUILDTARGETS+=	clean_METALOG
 .if !defined(NODISTRIBDIRS)
 BUILDTARGETS+=	do-distrib-dirs
 .endif
 .if !defined(NOINCLUDES)
 BUILDTARGETS+=	includes
 .endif
 BUILDTARGETS+=	do-lib
 BUILDTARGETS+=	do-compat-lib
 .if ${MKLLVM} != "no"
 BUILDTARGETS+=	do-sanitizer
 .if ${MKSANITIZER:Uno} == "yes"
 BUILDTARGETS+=	do-sanitizer-tools
 .endif
 .endif
 .if ${MKX11} != "no"
 BUILDTARGETS+=	do-x11
 .endif
 .if !defined(NOBINARIES)
 BUILDTARGETS+=	do-build
 BUILDTARGETS+=	do-obsolete
 .endif
+#
 # Enforce proper ordering of some rules.
+#
 .ORDER:		${BUILDTARGETS}
 includes-lib:	.PHONY includes-include includes-sys
+#
 # Record the values of variables that might affect the build.
 # If no values have changed, avoid updating the timestamp
 # of the params file.
+#
 # This is referenced by _NETBSD_VERSION_DEPENDS in <bsd.own.mk>.
+#
 .include "${NETBSDSRCDIR}/etc/Makefile.params"
 CLEANDIRFILES+= params
 params: .EXEC
 	${_MKMSG_CREATE} params
 	@${PRINT_PARAMS} >${.TARGET}.new
 	@if cmp -s ${.TARGET}.new ${.TARGET} > /dev/null 2>&1; then \
 		: "params is unchanged" ; \
 		rm ${.TARGET}.new ; \
 	else \
 		: "params has changed or is new" ; \
 		mv ${.TARGET}.new ${.TARGET} ; \
 	fi
+#
 # Display current make(1) parameters
+#
 show-params: .PHONY .MAKE
 	@${PRINT_PARAMS}
+#
 # Build the system and install into DESTDIR.
+#
 START_TIME!=	date
 build: .PHONY .MAKE
 .if defined(BUILD_DONE)
 	@echo "Build already installed into ${DESTDIR}"
 .else
 	@echo "Build started at: ${START_TIME}"
 .for tgt in ${BUILDTARGETS}
 	${MAKEDIRTARGET} . ${tgt}
 .endfor
 	${MAKEDIRTARGET} etc install-etc-release
 	@echo   "Build started at:  ${START_TIME}"
 	@printf "Build finished at: " && date
 .endif
+#
 # Build a full distribution, but not a release (i.e. no sets into
 # ${RELEASEDIR}).  "buildworld" enforces a build to ${DESTDIR} != /
+#
 distribution buildworld: .PHONY .MAKE
 .if make(buildworld) && \
     (!defined(DESTDIR) || ${DESTDIR} == "" || ${DESTDIR} == "/")
 	@echo "Won't make ${.TARGET} with DESTDIR=/"
 	@false
 .endif
 	${MAKEDIRTARGET} . build NOPOSTINSTALL=1
 	${MAKEDIRTARGET} etc distribution INSTALL_DONE=1
 .if defined(DESTDIR) && ${DESTDIR} != "" && ${DESTDIR} != "/"
 	${MAKEDIRTARGET} . postinstall-fix-obsolete
 	${MAKEDIRTARGET} . postinstall-fix-obsolete_stand
 	${MAKEDIRTARGET} distrib/sets checkflist
 .endif
 	@echo   "make ${.TARGET} started at:  ${START_TIME}"
 	@printf "make ${.TARGET} finished at: " && date
+#
 # Install the distribution from $DESTDIR to $INSTALLWORLDDIR (defaults to `/')
 # If installing to /, ensures that the host's operating system is NetBSD and
 # the host's `uname -m` == ${MACHINE}.
+#
 HOST_UNAME_S!=	uname -s
 HOST_UNAME_M!=	uname -m
 installworld: .PHONY .MAKE
 .if (!defined(DESTDIR) || ${DESTDIR} == "" || ${DESTDIR} == "/")
 	@echo "Can't make ${.TARGET} to DESTDIR=/"
 	@false
 .endif
 .if !defined(INSTALLWORLDDIR) || \
     ${INSTALLWORLDDIR} == "" || ${INSTALLWORLDDIR} == "/"
 .if (${HOST_UNAME_S} != "NetBSD")
 	@echo "Won't cross-make ${.TARGET} from ${HOST_UNAME_S} to NetBSD with INSTALLWORLDDIR=/"
 	@false
 .endif
 .if (${HOST_UNAME_M} != ${MACHINE})
 	@echo "Won't cross-make ${.TARGET} from ${HOST_UNAME_M} to ${MACHINE} with INSTALLWORLDDIR=/"
 	@false
 .endif
 .endif
 	${MAKEDIRTARGET} distrib/sets installsets \
 		INSTALLDIR=${INSTALLWORLDDIR:U/} INSTALLSETS=${INSTALLSETS:Q}
 	${MAKEDIRTARGET} . postinstall-check DESTDIR=${INSTALLWORLDDIR}
 	@echo   "make ${.TARGET} started at:  ${START_TIME}"
 	@printf "make ${.TARGET} finished at: " && date
+#
 # Install modules from $DESTDIR to $INSTALLMODULESDIR
+#
 installmodules: .PHONY .MAKE
 .if (!defined(DESTDIR) || ${DESTDIR} == "" || ${DESTDIR} == "/")
 	@echo "Can't make ${.TARGET} to DESTDIR=/"
 	@false
 .endif
 .if !defined(INSTALLMODULESDIR) || \
     ${INSTALLMODULESDIR} == "" || ${INSTALLMODULESDIR} == "/"
 .if (${HOST_UNAME_S} != "NetBSD")
 	@echo "Won't cross-make ${.TARGET} from ${HOST_UNAME_S} to NetBSD with INSTALLMODULESDIR=/"
 	@false
 .endif
 .if (${HOST_UNAME_M} != ${MACHINE})
 	@echo "Won't cross-make ${.TARGET} from ${HOST_UNAME_M} to ${MACHINE} with INSTALLMODULESDIR=/"
 	@false
 .endif
 .endif
 	${MAKEDIRTARGET} sys/modules install DESTDIR=${INSTALLMODULESDIR:U/}
 	@echo   "make ${.TARGET} started at:  ${START_TIME}"
 	@printf "make ${.TARGET} finished at: " && date
+#
 # Create sets from $DESTDIR or $NETBSDSRCDIR into $RELEASEDIR
+#
 .for tgt in sets sourcesets syspkgs
 ${tgt}: .PHONY .MAKE
 	${MAKEDIRTARGET} distrib/sets ${tgt}
 .endfor
+#
 # Build a release or snapshot (implies "make distribution").  Note that
 # in this case, the set lists will be checked before the tar files
 # are made.
+#
 release snapshot: .PHONY .MAKE
 	${MAKEDIRTARGET} . distribution
 	${MAKEDIRTARGET} etc release DISTRIBUTION_DONE=1
 	@echo   "make ${.TARGET} started at:  ${START_TIME}"
 	@printf "make ${.TARGET} finished at: " && date
+#
 # Create a CD-ROM image.
+#
 iso-image: .PHONY
 	${MAKEDIRTARGET} distrib iso_image
 	${MAKEDIRTARGET} etc iso-image
 	@echo   "make ${.TARGET} started at:  ${START_TIME}"
 	@printf "make ${.TARGET} finished at: " && date
 iso-image-source: .PHONY
 	${MAKEDIRTARGET} distrib iso_image CDSOURCE=true
 	${MAKEDIRTARGET} etc iso-image
 	@echo   "make ${.TARGET} started at:  ${START_TIME}"
 	@printf "make ${.TARGET} finished at: " && date
+#
 # Create bootable live images.
+#
 live-image: .PHONY
 	${MAKEDIRTARGET} etc live-image
 	@echo   "make ${.TARGET} started at:  ${START_TIME}"
 	@printf "make ${.TARGET} finished at: " && date
+#
 # Create bootable installation images.
+#
 install-image: .PHONY
 	${MAKEDIRTARGET} etc install-image
 	@echo   "make ${.TARGET} started at:  ${START_TIME}"
 	@printf "make ${.TARGET} finished at: " && date
+#
 # Special components of the "make build" process.
+#
 check-tools: .PHONY
 .if ${TOOLCHAIN_MISSING} != "no" && !defined(EXTERNAL_TOOLCHAIN)
 	@echo '*** WARNING:  Building on MACHINE=${MACHINE} with missing toolchain.'
 	@echo '*** May result in a failed build or corrupt binaries!'
 .elif defined(EXTERNAL_TOOLCHAIN)
 	@echo '*** Using external toolchain rooted at ${EXTERNAL_TOOLCHAIN}.'
 .endif
 .if defined(NBUILDJOBS)
 	@echo '*** WARNING: NBUILDJOBS is obsolete; use -j directly instead!'
 .endif
 # Delete or sanitise a leftover METALOG from a previous build.
 clean_METALOG: .PHONY .MAKE
 .if ${MKUPDATE} != "no"
 	${MAKEDIRTARGET} distrib/sets clean_METALOG
 .endif
 do-distrib-dirs: .PHONY .MAKE
 .if !defined(DESTDIR) || ${DESTDIR} == ""
 	${MAKEDIRTARGET} etc distrib-dirs DESTDIR=/
 .else
 	${MAKEDIRTARGET} etc distrib-dirs DESTDIR=${DESTDIR}
 .endif
 .for targ in cleandir obj includes
 do-${targ}: .PHONY ${targ}
 	@true
 .endfor
 do-tools: .PHONY .MAKE
 	${MAKEDIRTARGET} tools build_install
 do-lib: .PHONY .MAKE
 	${MAKEDIRTARGET} lib build_install
 do-compat-lib: .PHONY .MAKE
 	${MAKEDIRTARGET} compat build_install BOOTSTRAP_SUBDIRS="../../../lib"
 do-sanitizer: .PHONY .MAKE
 	${MAKEDIRTARGET} external/bsd/compiler_rt build_install
 do-sanitizer-tools: .PHONY .MAKE
 .if !exists(${TOOLDIR}/lib/clang) && ${HAVE_LLVM:Uno} == "yes"
 	mkdir -p ${TOOLDIR}/lib/clang
 	cd ${DESTDIR}/usr/lib/clang && \
 		${TOOL_PAX} -rw . ${TOOLDIR}/lib/clang
 .endif
 do-top-obj: .PHONY .MAKE
 	${MAKEDIRTARGET} . obj NOSUBDIR=
 do-tools-obj: .PHONY .MAKE
 	${MAKEDIRTARGET} tools obj
 do-build: .PHONY .MAKE
 .for targ in dependall install
 	${MAKEDIRTARGET} . ${targ} BUILD_tools=no BUILD_lib=no
 .endfor
 do-x11: .PHONY .MAKE
 .if ${MKX11} != "no"
 	${MAKEDIRTARGET} external/mit/xorg/tools all
 	${MAKEDIRTARGET} external/mit/xorg/lib build_install
 .if ${MKCOMPATX11} != "no"
 	${MAKEDIRTARGET} compat build_install BOOTSTRAP_SUBDIRS="../../../external/mit/xorg/lib"
 .endif
 .else
 	@echo "MKX11 is not enabled"
 	@false
 .endif
 do-obsolete: .PHONY .MAKE
 	${MAKEDIRTARGET} etc install-obsolete-lists
+#
 # Speedup stubs for some subtrees that don't need to run these rules.
 # (Tells <bsd.subdir.mk> not to recurse for them.)
+#
 .for dir in bin etc distrib games libexec regress sbin usr.bin usr.sbin tools
 includes-${dir}: .PHONY
 	@true
 .endfor
 .for dir in etc distrib regress
 install-${dir}: .PHONY
 	@true
 .endfor
+#
 # XXX this needs to change when distrib Makefiles are recursion compliant
 # XXX many distrib subdirs need "cd etc && make snap_pre snap_kern" first...
+#
 dependall-distrib depend-distrib all-distrib: .PHONY
 	@true
 .include <bsd.obj.mk>
 .include <bsd.kernobj.mk>
 .include <bsd.subdir.mk>
 .include <bsd.clean.mk>

 @@ -1,2498 +1,2490 @@
-.\"	$NetBSD: BUILDING.mdoc,v 1.141 2023/06/05 22:36:17 lukem Exp $
+.\"	$NetBSD: BUILDING.mdoc,v 1.142 2023/06/11 10:43:51 lukem Exp $
 .\"
 .\" Copyright (c) 2001-2023 The NetBSD Foundation, Inc.
 .\" All rights reserved.
 .\"
 .\" This code is derived from software contributed to The NetBSD Foundation
 .\" by Todd Vierling and Luke Mewburn.
 .\"
 .\" 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 .\" ``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 FOUNDATION OR CONTRIBUTORS
 .\" 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.
 .\"
 .\" NOTE: After changing this file, run "make regen" in the src/doc
 .\" directory, and check in both src/BUILDING and src/doc/BUILDING.mdoc.
 .\"
 .\" Toolchain prefix for commands
 .ds toolprefix nb
+.
-.Dd June 5, 2023
+.Dd June 10, 2023
 .Dt BUILDING 8
 .Os NetBSD
 .\" turn off hyphenation
 .hym 999
+.
 .\" if this file is processed with real roff (doc.tmac)
 .\" now that the tmac files have been lazily read,
 .\" we can override ``quotes'' with "quotes" for ascii output
 .ie '\*[Lq]'``' \{\
 .ds Lq \*q
 .ds Rq \*q
 .\}
 .\" and disable hyphenation
 .nr hyphen-flags 0
+.
 .Sh NAME
+.
 .Nm BUILDING
 .Nd Procedure for building
 .Nx
 from source code
+.
 .Sh REQUIREMENTS
+.
 .Nx
 is designed to be buildable on most POSIX-compliant host systems.
 The basic build procedure is the same whether compiling
 .Em natively
 (on the same
 .Nx
 architecture) or
 .Em cross compiling
 (on another architecture or OS).
 .Pp
 This source tree contains a special subtree,
 .Dq tools ,
 which uses the host system to create a build toolchain for the target
 architecture.
 The host system must have at least C and C++
 compilers in order to create the toolchain
 .Nm ( make
 is not required); all other tools are created as part of the
 .Nx
 build process.
 (See the
 .Sx Environment variables
 section below if you need
 to override or manually select your compilers.)
+.
 .Sh FILES
+.
 .Ss Source tree layout
+.
 .Bl -tag -width "BUILDING.mdoc"
+.
 .It Pa BUILDING
 This document (in plaintext).
 Generated from
 .Pa doc/BUILDING.mdoc .
+.
 .It Pa Makefile
 The main Makefile for
 .Nx ;
 should only be run for native builds with an appropriately up-to-date
 version of
 .Nx
 .Xr make 1 .
 Intended for expert use with knowledge of its shortcomings,
 it has been superseded by the
 .Nm build.sh
 shell script as the recommended means for building
 .Nx .
+.
 .It Pa UPDATING
 Special notes for updating from an earlier revision of
 .Nx .
 It is important to read this file before every build of an updated
 source tree.
+.
 .It Pa build.sh
 Bourne-compatible shell script used for building the host build tools
 and the
 .Nx
 system from scratch.
 Can be used for both native and cross builds, and should be used instead of
 .Xr make 1
 as it performs additional checks to prevent common issues going undetected, such
 as building with an outdated version of
 .Xr make 1 .
+.
 .It Pa crypto/dist/ , dist/ , gnu/dist/
 Sources imported verbatim from third parties, without mangling the
 existing build structure.
 Other source trees in
 .Sy bin
 through
 .Sy usr.sbin
 use the
 .Nx
 .Xr make 1
 .Dq reachover
 Makefile semantics when building these programs for a native host.
+.
 .It Pa distrib/ , etc/
 Sources for items used when making a full release snapshot, such as
 files installed in
 .Sy DESTDIR Ns Pa /etc
 on the destination system, boot media, and release notes.
+.
 .It Pa doc/BUILDING.mdoc
 This document, in -mdoc troff format; the original copy.
 Used to generate
 .Pa BUILDING .
+.
 .It Pa external , sys/external
 Sources and build infrastructure for components imported (mostly) unchanged
 from upstream maintainers, sorted by applicable license.
 This is (slowly) replacing the
 .Pa crypto/dist ,
 .Pa dist ,
 and
 .Pa gnu/dist
 directories.
+.
 .It Pa external/mit/xorg/
 .Dq Reachover
 build structure for modular Xorg; the source is in
 .Sy X11SRCDIR .
+.
 .It Pa regress/ , tests/
 Regression test harness.
 Can be cross-compiled, but only run natively.
 .Pa tests/
 uses the
 .Xr atf 7
 test framework;
 .Pa regress/
 contains older tests that have not yet been migrated to
 .Xr atf 7 .
+.
 .It Pa sys/
 .Nx
 kernel sources.
+.
 .It Pa tools/
 .Dq Reachover
 build structure for the host build tools.
 This has a special method of determining out-of-date status.
+.
 .It Pa tools/compat/README
 Special notes for cross-hosting a NetBSD build on non-NetBSD platforms.
+.
 .It Other directories including Pa bin/ ... usr.sbin/
 Sources to the
 .Nx
 userland (non-kernel) programs.
 If any of these directories are missing, they will be skipped during the build.
+.
 .El
+.
 .Ss Build tree layout
+.
 The
 .Nx
 build tree is described in
 .Xr hier 7 ,
 and the release layout is described in
 .Xr release 7 .
+.
 .Sh CONFIGURATION
+.
 .Ss Environment variables
+.
 .de DFLT
 .Pp
 .Em Default :
 ..
 .de DFLTn
 .DFLT
 .Dq no
 ..
 .de DFLTu
 .DFLT
 Unset.
 ..
 .de DFLTy
 .DFLT
 .Dq yes
 ..
 .de NODEF
 .Pp
 Forced to
 .Dq no
 if
 .Sy \\$*
 is defined,
 usually in the Makefile before any
 .Xr make 1
 .Cm \&.include
 directives.
 ..
 .de NOVAR
 .Pp
 Forced to
 .Dq no
 if
 .Sy \\$* .
 ..
 .de YorN
 Can be set to
 .Dq yes
 or
 .Dq no .
 ..
+.
 Several environment variables control the behaviour of
 .Nx
 builds.
+.
 .Bl -tag -width 14n
+.
 .\" These entries are sorted alphabetically.
+.
 .It Sy HOST_CC
 Path name to C compiler used to create the toolchain.
+.
 .It Sy HOST_CFLAGS
 Flags passed to the host C compiler.
+.
 .It Sy HOST_CXX
 Path name to C++ compiler used to create the toolchain.
+.
 .It Sy HOST_CXXFLAGS
 Flags passed to the host C++ compiler.
+.
 .It Sy HOST_SH
 Path name to a shell available on the host system
 and suitable for use during the build.
 The
 .Nx
 build system requires a modern Bourne-like shell
 with POSIX-compliant features,
 and also requires support for the
 .Dq local
 keyword to declare local variables in shell functions
 (which is a widely-implemented but non-standardised feature).
 .Pp
 Depending on the host system, a suitable shell may be
 .Pa /bin/sh ,
 .Pa /usr/xpg4/bin/sh ,
 .Pa /bin/ksh
 (provided it is a variant of ksh that supports the
 .Dq local
 keyword,
 such as ksh88, but not ksh93),
 or
 .Pa /usr/local/bin/bash .
 .Pp
 Most parts of the build require
 .Sy HOST_SH
 to be an absolute path; however,
 .Nm build.sh
 allows it to be a simple command name, which will be converted
 to an absolute path by searching the
 .Sy PATH .
+.
 .It Sy INSTALLBOOT_UBOOT_PATHS
 A colon-separated list of search paths used by
 .Xr installboot 8
 to find U-Boot packages.
+.
 .It Sy MACHINE
 Machine type, e.g.,
 .Dq macppc .
+.
 .It Sy MACHINE_ARCH
 Machine architecture, e.g.,
 .Dq powerpc .
+.
 .It Sy MAKE
 Path name to invoke
 .Xr make 1
 as.
+.
 .It Sy MAKECONF
 The name of the
 .Xr make 1
 configuration file.
 See
 .Sx \*qmake\*q variables
 and
 .Xr mk.conf 5 .
 .Pp
 .Em Note :
 Only settable in the process environment.
 .DFLT
 .Dq /etc/mk.conf
+.
 .It Sy MAKEFLAGS
 Flags to invoke
 .Xr make 1
 with.
 .Pp
 .Em Note :
 .Sy build.sh
 ignores the value of
 .Sy MAKEFLAGS
 passed in the environment, but allows
 .Sy MAKEFLAGS
 to be set via the
 .Fl V
 option.
+.
 .It Sy MAKEOBJDIR
 Directory to use as the
 .Sy .OBJDIR
 for the current directory.
 The value is subjected to variable expansion by
 .Xr make 1 .
 Typical usage is to set this variable to a value involving the use of
 .Sq ${.CURDIR:S...}
 or
 .Sq ${.CURDIR:C...} ,
 to derive the value of
 .Sy .OBJDIR
 from the value of
 .Sy .CURDIR .
 Used only if
 .Sy MAKEOBJDIRPREFIX
 is not defined.
 .Pp
 .Em Note :
 .Sy MAKEOBJDIR
 can be provided only in the environment or via the
 .Fl O
 flag of
 .Nm build.sh ;
 it cannot usefully be set inside a Makefile, including in
 .Xr mk.conf 5
 or
 .Sy MAKECONF .
+.
 .It Sy MAKEOBJDIRPREFIX
 Top level directory of the object directory tree.
 The value is subjected to variable expansion by
 .Xr make 1 .
 .Sy build.sh
 will create the
 ${MAKEOBJDIRPREFIX}
 directory if necessary, but if
 .Xr make 1
 is used without
 .Sy build.sh ,
 then rules in
 .Aq bsd.obj.mk
 will abort the build if the
 ${MAKEOBJDIRPREFIX}
 directory does not exist.
 If the value is defined and valid, then
 ${MAKEOBJDIRPREFIX}/${.CURDIR}
 is used as the
 .Sy .OBJDIR
 for the current directory.
 The current directory may be read only.
 .Pp
 .Em Note :
 .Sy MAKEOBJDIRPREFIX
 can be provided only in the environment or via the
 .Fl M
 flag of
 .Nm build.sh ;
 it cannot usefully be set inside a Makefile, including in
 .Xr mk.conf 5
 or
 .Sy MAKECONF .
+.
 .It Sy TMPDIR
 Top-level directory to store temporary directories used by
 .Sy build.sh
 before paths to other directories such as
 .Sy .OBJDIR
 can be determined.
 .Pp
 .Em Note :
 Must support execution of binaries.
 I.e., without
 .Xr mount 8 Ns 's
 .Fl o
 .Sy noexec
 option.
 .DFLT
 .Dq /tmp .
+.
 .El
+.
 .Ss \*qmake\*q variables
+.
 Several variables control the behavior of
 .Nx
 builds.
 Unless otherwise specified, these variables may be set in
 either the process environment or the
 .Xr make 1
 configuration file
 .Xr mk.conf 5
 specified by
 .Sy MAKECONF .
 .Pp
 This list is not comprehensive;
 all supported variables and their defaults are documented in
 .Xr mk.conf 5 .
+.
 .Bl -tag -width 14n
+.
 .\" These entries are sorted alphabetically.
 .\" Keep in sync with canonical reference share/man/man5/mk.conf.5
 .\" and with share/mk/bsd.README.
+.
 .It Sy BSDOBJDIR
 The real path to the object directory tree for the
 .Nx
 source tree.
 .DFLT
 .Dq Pa /usr/obj
+.
 .It Sy BSDSRCDIR
 The real path to the
 .Nx
 source tree, if
 .Sy NETBSDSRCDIR
 isn't defined.
 .DFLT
 .Dq Pa /usr/src
+.
 .It Sy BUILDID
 Identifier for the build.
 If set, this should be a short string that is suitable for use as
 part of a file or directory name.
 The identifier will be appended to
 object directory names, and can be consulted in the
 .Xr make 1
 configuration file in order to set additional build parameters,
 such as compiler flags.
 It will also be used as part of the kernel version string,
 which can be shown by
 .Dq Li uname \-v .
 .DFLTu
+.
 .It Sy BUILDINFO
 Optional multi-line string containing information about the build.
 This will appear in
 .Sy DESTDIR Ns Pa /etc/release ,
 and it will be stored in the
 .Va buildinfo
 variable in any kernels that are built.
 When such kernels are booted, the
 .Xr sysctl 7
 .Va kern.buildinfo
 variable will report this value.
 The string may contain backslash escape sequences, such as
 .Dq "\e\e"
 (representing a backslash character)
 and
 .Dq "\en"
 (representing a newline).
 .DFLTu
+.
 .It Sy BUILDSEED
 .Xr g++ 1
 uses random numbers when compiling C++ code.
 This variable seeds the
 .Xr g++ 1
 random number generator using
 .Fl frandom-seed
 with this value.
 By default, it is set to
 .Do NetBSD-( Ns Em majorversion ) Dc .
 Using a fixed value causes C++ binaries to be the same when
 built from the same sources, resulting in identical (reproducible) builds.
 Additional information is available in the
 .Xr g++ 1
 documentation of
 .Fl frandom-seed .
 .DFLTu
+.
 .It Sy CPUFLAGS
 Additional flags to the compiler/assembler to select
 CPU instruction set options, CPU tuning options, etc.
 .DFLTu
+.
 .It Sy DESTDIR
 Directory to contain the built
 .Nx
 system.
 If set, special options are passed to the compilation tools to
 prevent their default use of the host system's
 .Pa /usr/include , /usr/lib ,
 and so forth.
 This pathname must be an absolute path, and should
 .Em not
 end with a slash
 .Pq /
 character.
 (For installation into the system's root directory, set
 .Sy DESTDIR
 to an empty string, not to
 .Dq / ) .
 The directory must reside on a file system which supports long file
 names and hard links.
 .Pp
 .Em Note :
 .Sy build.sh
 will provide a default of
 .Pa destdir . Ns Sy MACHINE
 (in the top-level
 .Sy .OBJDIR )
 unless run in
 .Sq expert
 mode.
 .DFLT
 Empty string if
 .Sy USETOOLS
 is
 .Dq yes ;
 unset otherwise.
+.
 .It Sy EXTERNAL_TOOLCHAIN
 If defined, this variable indicates the root directory of
 an external toolchain which will be used to build the tree.
 For example, if a platform is a
 .Sy TOOLCHAIN_MISSING
 platform,
 .Sy EXTERNAL_TOOLCHAIN
 can be used to re-enable the cross-compile framework.
 .Pp
 If
 .Sy EXTERNAL_TOOLCHAIN
 is defined, act as
 .Sy MKGCC=no ,
 since the external version of the compiler may not be
 able to build the library components of the in-tree compiler.
 .Pp
 This variable should be used in conjunction with an appropriate
 .Sy HAVE_GCC
 or
 .Sy HAVE_LLVM
 setting to control the compiler flags.
 .Pp
 .Em Note :
 This variable is not yet used in as many places as it should be.
 Expect the exact semantics of this variable to change in the short
 term as parts of the cross-compile framework continue to be cleaned up.
 .DFLTu
+.
 .It Sy MAKEVERBOSE
 Level of verbosity of status messages.
 Supported values:
 .Bl -tag -width 2n
 .It 0
 No descriptive messages or commands executed by
 .Xr make 1
 are shown.
 .It 1
 Brief messages are shown describing what is being done,
 but the actual commands executed by
 .Xr make 1
 are not shown.
 .It 2
 Descriptive messages are shown as above (prefixed with a
 .Sq # ) ,
 and ordinary commands performed by
 .Xr make 1
 are shown.
 .It 3
 In addition to the above, all commands performed by
 .Xr make 1
 are shown, even if they would ordinarily have been hidden
 through use of the
 .Dq \&@
 prefix in the relevant makefile.
 .It 4
 In addition to the above, commands executed by
 .Xr make 1
 are traced through use of the
 .Xr sh 1
 .Dq Fl x
 flag.
 .El
 .DFLT
+.
 .It Sy MKCATPAGES
 .YorN
 Indicates whether preformatted plaintext manual pages will be created
 and installed.
 .NOVAR MKMAN=no No or Sy MKSHARE=no
 .DFLTn
+.
 .It Sy MKCROSSGDB
 .YorN
 Create a cross-gdb as a host tool.
 .DFLTn
+.
 .It Sy MKDEBUG
 .YorN
 Indicates whether debug information should be generated for
 all userland binaries.
 The result is collected as an additional
 .Sy debug.tgz
 and
 .Sy xdebug.tgz
 set and installed in
 .Sy DESTDIR Ns Pa /usr/libdata/debug .
 .NODEF NODEBUG
 .DFLTn
+.
 .It Sy MKDEBUGKERNEL
 .YorN
 Indicates whether debugging symbols will be built for kernels
 by default; pretend as if
 .Em makeoptions DEBUG="-g"
 is specified in kernel configuration files.
 This will also put the debug kernel
 .Pa netbsd.gdb
 in the kernel sets.
 See
 .Xr options 4
 for details.
 This is useful if a cross-gdb is built as well (see
 .Sy MKCROSSGDB ) .
 .DFLTn
+.
 .It Sy MKDEBUGLIB
 .YorN
 Indicates whether debug libraries
 .Sy ( lib*_g.a )
 will be built and installed.
 Debug libraries are compiled with
 .Dq Li -g -DDEBUG .
 .NODEF NODEBUGLIB
 .DFLTn
+.
 .It Sy MKDEBUGTOOLS
 .YorN
 Indicates whether debug information
 .Sy ( lib*_g.a )
 will be included in the build toolchain.
 .DFLTn
+.
 .It Sy MKDOC
 .YorN
 Indicates whether system documentation destined for
 .Sy DESTDIR Ns Pa /usr/share/doc
 will be installed.
 .NODEF NODOC
 .NOVAR MKSHARE=no
 .DFLTy
+.
 .It Sy MKHOSTOBJ
 .YorN
 If set to
 .Dq yes ,
 then for programs intended to be run on the compile host,
 the name, release, and architecture of the host operating system
 will be suffixed to the name of the object directory created by
 .Dq make obj .
 (This allows multiple host systems to compile NetBSD for a single target.)
 If set to
 .Dq no ,
 then programs built to be run on the compile host will use the same
 object directory names as programs built to be run on the target.
 .DFLTn
+.
 .It Sy MKHTML
 .YorN
 Indicates whether the HTML manual pages are created and installed.
 and installed
 .NODEF NOHTML
 .NOVAR MKMAN=no No or Sy MKSHARE=no
 .DFLTy
+.
 .It Sy MKINFO
 .YorN
 Indicates whether GNU Info files, used for the documentation for
 most of the compilation tools, will be built and installed.
 .NODEF NOINFO
 .NOVAR MKSHARE=no
 .DFLTy
+.
 .It Sy MKKDEBUG
 Deprecated, use
 .Sy MKDEBUGKERNEL .
+.
 .It Sy MKKMOD
 .YorN
 Indicates whether kernel modules are built and installed.
 .DFLTn
 on
 .Sy or1k ;
 .Dq yes
 on other platforms.
+.
 .It Sy MKLINKLIB
 .YorN
 Indicates whether all of the shared library infrastructure
 will be built and installed.
 If
 .Dq no ,
 prevents:
 installation of the
 .Sy *.a
 libraries,
 installation of the
 .Sy *_pic.a
 libraries on PIC systems,
 building of
 .Sy *.a
 libraries on PIC systems,
 or
 installation of
 .Sy .so
 symlinks on ELF systems.
 .NODEF NOLINKLIB
 .Pp
 If
 .Dq no ,
 acts as
 .Sy MKLINT=no MKPICINSTALL=no MKPROFILE=no .
 .DFLTy
+.
 .It Sy MKLINT
 .YorN
 Indicates whether
 .Xr lint 1
 will be run against portions of the
 .Nx
 source code during the build, and whether lint libraries will be
 installed into
 .Sy DESTDIR Ns Pa /usr/libdata/lint .
 .NODEF NOLINT
 .NOVAR MKLINKLIB=no
 .DFLTn
+.
 .It Sy MKMAN
 .YorN
 Indicates whether manual pages will be installed.
 .NODEF NOMAN
 .NOVAR MKSHARE=no
 .Pp
 If
 .Dq no ,
 acts as
 .Sy MKCATPAGES=no MKHTML=no .
 .DFLTy
+.
 .It Sy MKNLS
 .YorN
 Indicates whether Native Language System (NLS) locale zone files will be
 built and installed.
 .NODEF NONLS
 .NOVAR MKSHARE=no
 .DFLTy
+.
 .It Sy MKOBJ
 .YorN
 Indicates whether object directories will be created when running
 .Dq make obj .
 If set to
 .Dq no ,
 then all built files will be located inside the regular source tree.
 .NODEF NOOBJ
 .Pp
 If
 .Dq no ,
 acts as
 .Sy MKOBJDIRS=no .
 .Pp
 .Em Note :
 Setting
 .Sy MKOBJ
 to
 .Dq no
 is not recommended and may cause problems when updating the tree with
 .Xr cvs 1 .
 .DFLTy
+.
 .It Sy MKOBJDIRS
 .YorN
 Indicates whether object directories will be created automatically
 (via a
 .Dq make obj
 pass) at the start of a build.
 .NOVAR MKOBJ=no
 .DFLTn
+.
 .It Sy MKPIC
 .YorN
 Indicates whether shared objects and libraries will be created and
 installed.
 If
 .Dq no ,
 the entire built system will be statically linked.
 .NODEF NOPIC
 .Pp
 If
 .Dq no ,
 acts as
 .Sy MKPICLIB=no .
 .DFLTn
 on
 .Sy m68000 ;
 .Dq yes
 on other platforms.
+.
 .It Sy MKPICINSTALL
 .YorN
 Indicates whether the
 .Xr ar 1
 format libraries
 .Sy ( lib*_pic.a ) ,
 used to generate shared libraries, are installed.
 .NODEF NOPICINSTALL
 .NOVAR MKLINKLIB=no
 .DFLTn
+.
 .It Sy MKPROFILE
 .YorN
 Indicates whether profiled libraries
 .Sy ( lib*_p.a )
 will be built and installed.
 .NODEF NOPROFILE
 .NOVAR MKLINKLIB=no
 .DFLTn
 on
 .Sy or1k ,
 .Sy riscv32 ,
 and
 .Sy riscv64
 (due to toolchain problems with profiled code);
 .Dq yes
 on other platforms.
+.
 .It Sy MKREPRO
 .YorN
 Indicates whether builds are to be reproducible.
 If
 .Dq yes ,
 two builds from the same source tree will produce the same build
 results.
 .Pp
 Used as the default for
 .Sy MKARZERO .
 .Pp
 .\" Note: This paragraph is not in share/man/man5/mk.conf.5.
 This may be set to
 .Dq yes
 by giving
 .Sy build.sh
 the
 .Fl P
 option.
 .DFLTn
 .YorN
+.
 .It Sy MKREPRO_TIMESTAMP
 Unix timestamp.
 When
 .Sy MKREPRO
 is set, the timestamp of all files in the sets will be set
 to this value.
 .Pp
 .\" Note: This paragraph is not in share/man/man5/mk.conf.5.
 This may be set automatically to the latest source tree timestamp
 using
 .Xr cvslatest 1
 by giving
 .Sy build.sh
 the
 .Fl P
 option.
 .DFLTu
+.
 .It Sy MKSHARE
 .YorN
 Indicates whether files destined to reside in
 .Sy DESTDIR Ns Pa /usr/share
 will be built and installed.
 .NODEF NOSHARE
 .Pp
 If
 .Dq no ,
 acts as
 .Sy MKCATPAGES=no MKDOC=no MKINFO=no MKHTML=no MKMAN=no MKNLS=no .
 .DFLTy
+.
 .It Sy MKSTRIPIDENT
 .YorN
 Indicates whether RCS IDs, for use with
 .Xr ident 1 ,
 should be stripped from program binaries and shared libraries.
 .DFLTn
+.
 .It Sy MKSTRIPSYM
 .YorN
 Indicates whether all local symbols should be stripped from shared libraries.
 If
 .Dq yes ,
 strip all local symbols from shared libraries;
 the affect is equivalent to the
 .Fl x
 option of
 .Xr ld 1 .
 If
 .Dq no ,
 strip only temporary local symbols; the affect is equivalent
 to the
 .Fl X
 option of
 .Xr ld 1 .
 Keeping non-temporary local symbols
 such as static function names is useful on using DTrace for
 userland libraries and getting a backtrace from a rump kernel
 loading shared libraries.
 .DFLTy
+.
 .It Sy MKUNPRIVED
 .YorN
 Indicates whether an unprivileged install will occur.
 The user, group, permissions, and file flags, will not be set on
 the installed items; instead the information will be appended to
 a file called
 .Pa METALOG
 in
 .Sy DESTDIR .
 The contents of
 .Pa METALOG
 are used during the generation of the distribution tar files to ensure
 that the appropriate file ownership is stored.
 .DFLTn
+.
 .It Sy MKUPDATE
 .YorN
 Indicates whether all install operations intended to write to
 .Sy DESTDIR
 will compare file timestamps before installing, and skip the install
 phase if the destination files are up-to-date.
 .Pp
 .\" Note: This paragraph is not in share/man/man5/mk.conf.5.
 .Em Note :
 This also has implications on full builds (see next subsection).
 .DFLTn
+.
 .It Sy MKX11
 .YorN
 Indicates whether X11 is built and installed from
 .Sy X11SRCDIR ,
 and whether the X sets will be created.
 .Pp
 .Em Note :
 If
 .Dq yes ,
 requires
 .Sy MKINET6=yes .
 .DFLTn
+.
 .It Sy NETBSDSRCDIR
 The path to the top level of the
 .Nx
 sources.
 .DFLT
 Top level of the
 .Nx
 source tree (as determined by the presence of
 .Pa build.sh
 and
 .Pa tools/ )
 if
 .Xr make 1
 is run from within that tree;
 otherwise
 .Sy BSDSRCDIR
 will be used.
+.
 .It Sy TOOLCHAIN_MISSING
 .YorN
 If not
 .Dq no ,
 this indicates that the platform
 .Dq Sy MACHINE_ARCH
 being built does not have a working in-tree toolchain.
 .Pp
 If not
 .Dq no ,
 acts as
 .Sy MKBINUTILS=no MKGCC=no MKGDB=no .
 .DFLTn
+.
 .It Sy TOOLDIR
 Directory to hold the host tools, once built.
 If specified, must be an absolute path.
 This directory should be unique to a given host system and
 .Nx
 source tree.
 (However, multiple targets may share the same
 .Sy TOOLDIR ;
 the target-dependent files have unique names.)  If unset, a default based
 on the
 .Xr uname 1
 information of the host platform will be created in the
 .Sy .OBJDIR
 of
 .Pa src .
 .DFLTu
+.
 .It Sy USETOOLS
 .YorN
 Indicates whether the tools specified by
 .Sy TOOLDIR
 should be used as part of a build in progress.
 Must be set to
 .Dq yes
 if cross-compiling.
 .Bl -tag -width "never"
 .It yes
 Use the tools from
 .Sy TOOLDIR .
 .It no
 Do not use the tools from
 .Sy TOOLDIR ,
 but refuse to build native compilation tool components that are
 version-specific for that tool.
 .It never
 Do not use the tools from
 .Sy TOOLDIR ,
 even when building native tool components.
 This is similar to the traditional
 .Nx
 build method, but does
 .Em not
 verify that the compilation tools in use are up-to-date enough in order
 to build the tree successfully.
 This may cause build or runtime problems when building the whole
 .Nx
 source tree.
 .El
 .DFLTn
 when using
 .Aq bsd.*.mk
 outside the
 .Nx
 source tree (detected automatically) or if
 .Sy TOOLCHAIN_MISSING=yes ;
 .Dq yes
 otherwise.
+.
 .It Sy X11SRCDIR
 Directory containing the modular Xorg source.
 If specified, must be an absolute path.
 The main modular Xorg source is found in
 .Sy X11SRCDIR Ns Pa /external/mit .
 .DFLT
 .Sy NETBSDSRCDIR Ns Pa /../xsrc ,
 if that exists; otherwise
 .Pa /usr/xsrc .
+.
 .El
+.
 .Ss \*qmake\*q variables for full builds
+.
 These variables only affect the top level
 .Dq Makefile
 and do not affect manually building subtrees of the
 .Nx
 source code.
+.
 .Bl -tag -width 14n
+.
 .\" These entries are sorted alphabetically.
+.
 .It Sy INSTALLBOOT_BOARDS
 A list of boards to create bootable images for.
 If corresponding U-Boot packages are installed,
 bootable images are created as part of a release.
 See the
 .Bk -words
 .Fl o Sy board= Ns Ar name
 .Ek
 option of
 .Xr installboot 8 .
+.
 .It Sy INSTALLWORLDDIR
 Location for the
 .Dq make installworld
 target to install to.
 If specified, must be an absolute path.
 .DFLT
 .Dq /
+.
 .It Sy MKOBJDIRS
 .YorN
 Indicates whether object directories will be created automatically
 (via a
 .Dq make obj
 pass) at the start of a build.
 .DFLTn
 .Pp
 If using
 .Sy build.sh ,
 the default is
 .Dq yes .
 This may be set back to
 .Dq no
 by giving
 .Sy build.sh
 the
 .Fl o
 option.
+.
 .It Sy MKUPDATE
 .YorN
 If set, then in addition to the effects described for
 .Sy MKUPDATE=yes
 above, this implies the effects of
 .Sy NOCLEANDIR
 (i.e.,
 .Dq make cleandir
 is avoided).
 .DFLTn
 .Pp
 If using
 .Sy build.sh ,
 this may be set by giving the
 .Fl u
 option.
+.
 .It Sy NBUILDJOBS
 Now obsolete.
 Use the
 .Xr make 1
 option
 .Fl j ,
 instead.
 See below.
 .DFLTu
 .It Sy NOCLEANDIR
 If set, avoids the
 .Dq make cleandir
 phase of a full build.
 This has the effect of allowing only changed
 files in a source tree to be recompiled.
 This can speed up builds when updating only a few files in the tree.
 .DFLTu
 .Pp
 See also
 .Sy MKUPDATE .
+.
 .It Sy NODISTRIBDIRS
 If set, avoids the
 .Dq make distrib-dirs
 phase of a full build.
 This skips running
 .Xr mtree 8
 on
 .Sy DESTDIR ,
 useful on systems where building as an unprivileged user, or where it is
 known that the system-wide mtree files have not changed.
 .DFLTu
+.
 .It Sy NOINCLUDES
 If set, avoids the
 .Dq make includes
 phase of a full build.
 This has the effect of preventing
 .Xr make 1
 from thinking that some programs are out-of-date simply because the
 system include files have changed.
 However, this option should not be used when updating the entire
 .Nx
 source tree arbitrarily; it is suggested to use
 .Sy MKUPDATE=yes
 instead in that case.
 .DFLTu
+.
 .It Sy RELEASEDIR
 If set, specifies the directory to which a
 .Xr release 7
 layout will be written at the end of a
 .Dq make release .
 If specified, must be an absolute path.
 .Pp
 .Em Note :
 .Sy build.sh
 will provide a default of
 .Pa releasedir
 (in the top-level
 .Sy .OBJDIR )
 unless run in
 .Sq expert
 mode.
 .DFLTu
+.
 .El
+.
 .Sh BUILDING
+.
 .Ss \*qmake\*q command line options
 This is not a summary of all the options available to
 .Xr make 1 ;
 only the options used most frequently with
 .Nx
 builds are listed here.
+.
 .Bl -tag -width "var=value"
+.
 .It Fl j Ar njob
 Run up to
 .Ar njob
 .Xr make 1
 subjobs in parallel.
 Makefiles should use .WAIT or have explicit dependencies
 as necessary to enforce build ordering.
+.
 .It Fl m Ar dir
 Specify the default directory for searching for system Makefile
 segments, mainly the
 .Aq bsd.*.mk
 files.
 When building any full
 .Nx
 source tree, this should be set to the
 .Dq Pa share/mk
 directory in the source tree.
 This is set automatically when building from the top level, or when using
 .Sy build.sh .
+.
 .It Fl n
 Show the commands that would have been executed, but do not
 actually execute them.
 This will still cause recursion to take place.
+.
 .It Fl V Ar var
 Show
 .Xr make 1 Ns 's
 idea of the value of
 .Ar var .
 Does not build any targets.
+.
 .It Ar var Ns Sy = Ns Ar value
 Set the variable
 .Ar var
 to
 .Ar value ,
 overriding any setting specified by the process environment, the
 .Sy MAKECONF
 configuration file, or the system Makefile segments.
+.
 .El
+.
 .Ss \*qmake\*q targets
+.
 These default targets may be built by running
 .Xr make 1
 in any subtree of the
 .Nx
 source code.
 It is recommended that none of these be used from the top
 level Makefile; as a specific exception,
 .Dq make obj
 and
 .Dq make cleandir
 are useful in that context.
+.
 .Bl -tag -width "dependall"
+.
 .It Sy all
 Build programs, libraries, and preformatted documentation.
+.
 .It Sy clean
 Remove program and library object code files.
+.
 .It Sy cleandir
 Same as
 .Sy clean ,
 but also remove preformatted documentation, dependency files generated
 by
 .Dq make depend ,
 and any other files known to be created at build time.
+.
 .It Sy depend
 Create dependency files
 .Sy ( .depend )
 containing more detailed information about the dependencies of source
 code on header files.
 Allows programs to be recompiled automatically when a dependency changes.
+.
 .It Sy dependall
 Does a
 .Dq make depend
 immediately followed by a
 .Dq make all .
 This improves cache locality of the build since both passes read the source
 files in their entirety.
+.
 .It Sy distclean
 Synonym for
 .Sy cleandir .
+.
 .It Sy includes
 Build and install system header files.
 Typically needed before any system libraries or programs can be built.
+.
 .It Sy install
 Install programs, libraries, and documentation into
 .Sy DESTDIR .
 Few files will be installed to
 .Sy DESTDIR Ns Pa /dev ,
 .Sy DESTDIR Ns Pa /etc ,
 .Sy DESTDIR Ns Pa /root
 or
 .Sy DESTDIR Ns Pa /var
 in order to prevent user supplied configuration data from being overwritten.
 .It Sy lint
 Run
 .Xr lint 1
 against the C source code, where appropriate, and generate
 system-installed lint libraries.
+.
 .It Sy obj
 Create object directories to be used for built files, instead of
 building directly in the source tree.
+.
 .It Sy tags
 Create
 .Xr ctags 1
 searchable function lists usable by the
 .Xr ex 1
 and
 .Xr vi 1
 text editors.
+.
 .El
+.
 .Ss \*qmake\*q targets for the top level
+.
 Additional
 .Xr make 1
 targets are usable specifically from the top source level to facilitate
 building the entire
 .Nx
 source tree.
+.
 .Bl -tag -width "distribution"
+.
 .It Sy build
 Build the entire
 .Nx
 system (except the kernel).
 This orders portions of the source tree such that prerequisites
 will be built in the proper order.
+.
 .It Sy distribution
 Do a
 .Dq make build ,
 and then install a full distribution (which does not include a kernel) into
 .Sy DESTDIR ,
 including files in
 .Sy DESTDIR Ns Pa /dev ,
 .Sy DESTDIR Ns Pa /etc ,
 .Sy DESTDIR Ns Pa /root
 and
 .Sy DESTDIR Ns Pa /var .
+.
 .It Sy buildworld
 As per
 .Dq make distribution ,
 except that it ensures that
 .Sy DESTDIR
 is not the root directory.
+.
 .It Sy installworld
 Install the distribution from
 .Sy DESTDIR
 to
 .Sy INSTALLWORLDDIR ,
 which defaults to the root directory.
 Ensures that
 .Sy INSTALLWORLDDIR
 is not the root directory if cross compiling.
 .Pp
 The
 .Sy INSTALLSETS
 environment variable may be set to a space-separated list of
 distribution sets to be installed.
 By default, all sets except
 .Dq etc
 and
 .Dq xetc
 are installed, so most files in
 .Sy INSTALLWORLDDIR Ns Pa /etc
 will not be installed or modified.
 .Pp
 .Em Note :
 Before performing this operation with
 .Sy INSTALLWORLDDIR Ns = Ns Pa / ,
 it is highly recommended that you upgrade your kernel and reboot.
 After performing this operation,
 it is recommended that you use
 .Xr etcupdate 8
 to update files in
 .Sy INSTALLWORLDDIR Ns Pa /etc ,
 and
 .Xr postinstall 8
 to check for or fix inconsistencies.
 .It Sy sets
 Create distribution sets from
 .Sy DESTDIR
 into
 .Sy RELEASEDIR/RELEASEMACHINEDIR Ns Pa /binary/sets .
 Should be run after
 .Dq make distribution ,
 as
 .Dq make build
 alone does not install all of the required files.
+.
 .It Sy sourcesets
 Create source sets of the source tree into
 .Sy RELEASEDIR Ns Pa /source/sets .
+.
 .It Sy syspkgs
 Create syspkgs from
 .Sy DESTDIR
 into
 .Sy RELEASEDIR/RELEASEMACHINEDIR Ns Pa /binary/syspkgs .
 Should be run after
 .Dq make distribution ,
 as
 .Dq make build
 alone does not install all of the required files.
+.
 .It Sy release
 Do a
 .Dq make distribution ,
 build kernels, distribution media, and install sets
 (this as per
 .Dq make sets ) ,
 and
 then package the system into a standard release layout as described by
 .Xr release 7 .
 This requires that
 .Sy RELEASEDIR
 be set (see above).
+.
 .It Sy iso-image
 Create a
 .Nx
 installation CD-ROM image in the
 .Sy RELEASEDIR Ns Pa /images
 directory.
 The CD-ROM file system will have a layout as described in
 .Xr release 7 .
 .Pp
 For most machine types, the CD-ROM will be bootable, and will automatically
 run the
 .Xr sysinst 8
 menu-based installation program, which can be used to install or upgrade a
 .Nx
 system.
 Bootable CD-ROMs also contain tools that may be useful in
 repairing a damaged
 .Nx
 installation.
 .Pp
 Before
 .Dq make iso-image
 is attempted, RELEASEDIR must be populated by
 .Dq make release
 or equivalent.
 .Pp
 .Em Note :
 Other, smaller, CD-ROM images may be created in the
 .Sy RELEASEDIR/RELEASEMACHINEDIR Ns Pa /installation/cdrom
 directory by
 .Dq "make release" .
 These smaller images usually contain the same tools as the larger images in
 .Sy RELEASEDIR Ns Pa /images ,
 but do not contain additional content such as the distribution sets.
 .Pp
 .Em Note :
 The mac68k port still uses an older method of creating
 CD-ROM images.
 This requires the
 .Xr mkisofs 1
 utility, which is not part of
 .Nx ,
 but which can be installed from
 .Pa pkgsrc/sysutils/cdrtools .
+.
 .It Sy iso-image-source
 Create a
 .Nx
 installation CD-ROM image in the
 .Sy RELEASEDIR Ns Pa /images
 directory.
 The CD-ROM file system will have a layout as described in
 .Xr release 7 .
 It will have top level directories for the machine type and source.
 .Pp
 For most machine types, the CD-ROM will be bootable, and will automatically
 run the
 .Xr sysinst 8
 menu-based installation program, which can be used to install or upgrade a
 .Nx
 system.
 Bootable CD-ROMs also contain tools that may be useful in
 repairing a damaged
 .Nx
 installation.
 .Pp
 Before
 .Dq make iso-image-source
 is attempted, RELEASEDIR must be populated by
 .Dq make sourcesets release
 or equivalent.
 .Pp
 .Em Note :
 Other, smaller, CD-ROM images may be created in the
 .Sy RELEASEDIR/RELEASEMACHINEDIR Ns Pa /installation/cdrom
 directory by
 .Dq make release .
 These smaller images usually contain the same tools as the larger images in
 .Sy RELEASEDIR Ns Pa /images ,
 but do not contain additional content such as the distribution sets.
 .Pp
 .Em Note :
 The mac68k port still uses an older method of creating
 CD-ROM images.
 This requires the
 .Xr mkisofs 1
 utility, which is not part of
 .Nx ,
 but which can be installed from
 .Pa pkgsrc/sysutils/cdrtools .
+.
 .It Sy install-image
 Create a bootable
 .Nx
 installation disk image in the
 .Sy RELEASEDIR Ns Pa /images
 directory.
 The installation disk image is suitable for copying to
 bootable USB flash memory sticks, etc., for machines which
 are able to boot from such devices.
 The file system in the bootable disk image will have a layout
 as described in
 .Xr release 7 .
 .Pp
 The installation image is bootable, and will automatically
 run the
 .Xr sysinst 8
 menu-based installation program, which can be used to install or upgrade a
 .Nx
 system.
 The image also contains tools that may be
 useful in repairing a damaged
 .Nx
 installation.
 .Pp
 Before
 .Dq make install-image
 is attempted,
 .Sy RELEASEDIR
 must be populated by
 .Dq make release
 or equivalent.
 The build must have been performed with
 .Sy MKUNPRIVED=yes
 because
 .Dq make install-image
 relies on information in
 .Sy DESTDIR Ns Pa /METALOG .
+.
 .It Sy live-image
 Create
 .Nx
 live images in the
 .Sy RELEASEDIR/images
 directory.
 The live image contains all necessary files
 to boot
 .Nx
 up to multi-user mode, including all files
 which should be extracted during installation,
 .Nx
 disklabel, bootloaders, etc.
 .Pp
 The live image is suitable for use as a disk image in
 virtual machine environments such as QEMU,
 and also useful to boot
 .Nx
 from a USB flash memory stick
 on a real machine, without the need for installation.
 .Pp
 Before
 .Dq make live-image
 is attempted, RELEASEDIR must be populated by
 .Dq make release
 or equivalent.
 The build must have been performed with
 .Sy MKUNPRIVED=yes
 because
 .Dq make install-image
 relies on information in
 .Sy DESTDIR Ns Pa /METALOG .
+.
 .It Sy regression-tests
 Can only be run after building the regression tests in the directory
 .Dq regress .
 Runs those compiled regression tests on the local host.
 .Pp
 .Em Note :
 Most tests are now managed instead using
 .Xr atf 7 ;
 this target should probably run those as well but currently does not.
+.
 .El
+.
 .Ss The \*qbuild.sh\*q script
+.
 This script file is a shell script designed to build the
 entire
 .Nx
 system on any host with a suitable modern shell and some common
 utilities.
 The required shell features are described under the
 .Sy HOST_SH
 variable.
 .Pp
 If a host system's default shell does support the required
 features, then we suggest that you explicitly specify
 a suitable shell using a command like
 .Bd -unfilled -offset indent
 .Li /path/to/suitable/shell build.sh Op Ar options
 .Ed
 .Pp
 The above command will usually enable
 .Nm build.sh
 to automatically set
 .Sy HOST_SH Ns Cm = Ns Pa /path/to/suitable/shell ,
 but if that fails, then the following set of commands may be used instead:
 .Bd -unfilled -offset indent
 .Li HOST_SH= Ns Va /path/to/suitable/shell
 .Li export HOST_SH
 .Li ${HOST_SH} build.sh Op Ar options
 .Ed
 .Pp
 If
 .Sy build.sh
 detects that it is being executed under an unsuitable shell, it attempts
 to exec a suitable shell instead, or shows an error message.
 If
 .Sy HOST_SH
 is not set explicitly, then
 .Nm build.sh
 sets a default using heuristics dependent on the host platform,
 or from the shell under which
 .Nm build.sh
 is executed (if that can be determined),
 or using the first copy of
 .Pa sh
 found in
 .Sy PATH .
 .Pp
 All cross-compile builds, and most native builds, of the entire system
 should make use of
 .Sy build.sh
 rather than just running
 .Dq make .
 This way, the
 .Xr make 1
 program will be bootstrapped properly, in case the host system has an
 older or incompatible
 .Dq make
 program.
 .Pp
 When compiling the entire system via
 .Sy build.sh ,
 many
 .Xr make 1
 variables are set for you in order to help encapsulate the build
 process.
 In the list of options below, variables that are automatically set by
 .Sy build.sh
 are noted where applicable.
+.
 .Pp
 The following operations are supported by
 .Sy build.sh :
+.
 .Bl -tag -width "distribution"
+.
 .It Sy build
 Build the system as per
 .Dq make build .
 Before the main part of the build commences, this command runs the
 .Sy obj
 operation (unless the
 .Fl o
 option is given),
 .Dq make cleandir
 (unless the
 .Fl u
 option is given),
 and the
 .Sy tools
 operation.
+.
 .It Sy distribution
 Build a full distribution as per
 .Dq make distribution .
 This command first runs the
 .Sy build
 operation.
+.
 .It Sy release
 Build a full release as per
 .Dq make release .
 This command first runs the
 .Sy distribution
 operation.
+.
 .It Sy help
 Show a help message, and exit.
+.
 .It Sy makewrapper
 Create the
 .Sy \*[toolprefix]make-MACHINE
 wrapper.
 This operation is automatically performed for any of the other
 operations.
+.
 .It Sy cleandir
 Perform
 .Dq make cleandir .
+.
 .It Sy obj
 Perform
 .Dq make obj .
+.
 .It Sy tools
 Build and install the host tools from
 .Pa src/tools .
 This command will first run
 .Dq make obj
 and
 .Dq make cleandir
 in the
 .Pa tools
 subdirectory unless the
 .Fl o
 or
 .Fl u
 options (respectively) are given.
+.
 .It Sy install Ns = Ns Ar idir
 Install the contents of
 .Sy DESTDIR
 to
 .Ar idir ,
 using
 .Dq make installworld .
 .Pp
 .Em Note :
 Files that are part of the
 .Dq etc
 or
 .Dq xetc
 sets will not be installed, unless overridden by
 the INSTALLSETS environment variable.
+.
 .It Sy kernel Ns = Ns Ar kconf
 Build a new kernel.
 The
 .Ar kconf
 argument is the name of a configuration file suitable
 for use by
 .Xr config 1 .
 If
 .Ar kconf
 does not contain any
 .Sq /
 characters, the configuration file is expected to be found in the
 .Sy KERNCONFDIR
 directory, which is typically
 .Pa sys/arch/MACHINE/conf .
 The new kernel will be built in a subdirectory of
 .Sy KERNOBJDIR ,
 which is typically
 .Pa sys/arch/MACHINE/compile
 or an associated object directory.
 .Pp
 This command does
 .Em not
 imply the
 .Sy tools
 command; run the
 .Sy tools
 command first unless it is
 .Em certain
 that the tools already exist and are up to date.
 .Pp
 This command will run
 .Dq make cleandir
 on the kernel in question first unless the
 .Fl u
 option is given.
+.
 .It Sy kernel.gdb Ns = Ns Ar kconf
 Build a new kernel with debug information.
 Similar to the above
 .Sy kernel Ns = Ns Ar kconf
 operation, but creates a
 .Pa netbsd.gdb
 file alongside of the kernel
 .Pa netbsd ,
 which contains a full symbol table and can be used for debugging
 (for example with a cross-gdb built by
 .Sy MKCROSSGDB ) .
 .It Sy kernels
 This command will build all kernels defined in port specific release build
 procedure.
 .Pp
 This command internally calls the
 .Sy kernel Ns = Ns Ar kconf
 operation for each found kernel configuration file.
 .It Sy modules
 This command will build kernel modules and install them into
 .Sy DESTDIR .
+.
 .It Sy releasekernel Ns = Ns Ar kconf
 Install a
 .Xr gzip 1 Ns ed
 copy of the kernel previously built by
 .Sy kernel Ns = Ns Ar kconf
 into
 .Sy RELEASEDIR/RELEASEMACHINEDIR Ns Pa /binary/kernel ,
 usually as
 .Pa netbsd- Ns Ar kconf Ns Pa .gz ,
 although the
 .Dq Pa netbsd
 prefix is determined from the
 .Dq Sy config
 directives in
 .Ar kconf .
+.
 .It Sy sets
 Perform
 .Dq make sets .
+.
 .It Sy sourcesets
 Perform
 .Dq make sourcesets .
+.
 .It Sy syspkgs
 Perform
 .Dq make syspkgs .
+.
 .It Sy iso-image
 Perform
 .Dq make iso-image .
+.
 .It Sy iso-image-source
 Perform
 .Dq make iso-image-source .
+.
 .It Sy install-image
 Perform
 .Dq make install-image .
+.
 .It Sy live-image
 Perform
 .Dq make live-image .
+.
 .It Sy list-arch
 Show a list of valid
 .Sy MACHINE
 and
 .Sy MACHINE_ARCH
 settings, the default
 .Sy MACHINE_ARCH
 for each
 .Sy MACHINE ,
 and aliases for
 .Sy MACHINE Ns No / Ns Sy MACHINE_ARCH
 pairs, and then exits.
 The
 .Fl m
 or
 .Fl a
 options (or both) may be used to specify glob patterns
 that will be used to narrow the list of results;
 for example,
 .Dq Li build.sh -m 'evb*' -a '*arm*' list-arch
 will list all known
 .Sy MACHINE Ns No / Ns Sy MACHINE_ARCH
 values in which either
 .Sy MACHINE
 or
 .Sy ALIAS
 matches the pattern
 .Ql evb* ,
 and
 .Sy MACHINE_ARCH
 matches the pattern
 .Ql *arm* .
+.
 .El
+.
 .Pp
 The following command line options alter the behaviour of the
 .Sy build.sh
 operations described above:
+.
 .Bl -tag -width "-T tools"
+.
 .It Fl a Ar arch
 Set the value of
 .Sy MACHINE_ARCH
 to
 .Ar arch .
 See the
 .Fl m
 option for more information.
+.
 .It Fl B Ar buildid
 Set the value of
 .Sy BUILDID
 to
 .Ar buildid .
 This will also append the build identifier to the name of the
 .Dq make
 wrapper script so that the resulting name is of the form
 .Dq Sy \*[toolprefix]make-MACHINE-BUILDID .
+.
 .It Fl C Ar cdextras
 Append
 .Ar cdextras
 to the
 .Sy CDEXTRA
 variable,
 which is a space-separated list of files or directories that will be
 added to the CD-ROM image that may be create by the
 .Dq iso-image
 or
 .Dq iso-image-source
 operations.
 Files will be added to the root of the CD-ROM image, whereas directories
 will be copied recursively.
 If relative paths are specified, they will be converted to
 absolute paths before being used.
 Multiple paths may be specified via multiple
 .Fl C
 options, or via a single option whose argument contains multiple
 space-separated paths.
+.
 .It Fl c Ar compiler
 Select the compiler for the toolchain to build
 .Nx
 and for inclusion in the
 .Nx
 distribution.
 Supported choices:
 .Bl -inset -offset indent
 .It clang
 .It gcc
 [default]
 .El
 .Pp
 The compiler used to build the toolchain can be different; see
 .Sy HOST_CC
 and
 .Sy HOST_CXX .
 .It Fl D Ar dest
 Set the value of
 .Sy DESTDIR
 to
 .Ar dest .
 If a relative path is specified, it will be converted to an
 absolute path before being used.
+.
 .It Fl E
 Set
 .Sq expert
 mode.
 This overrides various sanity checks, and allows:
 .Sy DESTDIR
 does not have to be set to a non-root path for builds,
 and
 .Sy MKUNPRIVED=yes
 does not have to be set when building as a non-root user.
 .Pp
 .Em Note :
 It is highly recommended that you know what you are doing when
 you use this option.
+.
 .It Fl h
 Show a help message, and exit.
+.
 .It Fl j Ar njob
 Run up to
 .Ar njob
 .Xr make 1
 subjobs in parallel;
 passed through to
 .Xr make 1 .
 If you see failures for reasons other than running out of memory
 while using
 .Sy build.sh
 with
 .Fl j ,
 please save complete build logs
 so the failures can be analyzed.
 .Pp
 To achieve the fastest builds,
 .Fl j
 values between (1 + the number of CPUs) and (2 * the number of CPUs)
 are recommended.
 Use lower values on machines with limited memory or I/O bandwidth.
+.
 .It Fl M Ar obj
 Set
 .Sy MAKEOBJDIRPREFIX
 to
 .Ar obj .
 Unsets
 .Sy MAKEOBJDIR .
 See
 .Dq Fl O Ar obj
 for more information.
 .Pp
 For instance, if the source directory is
 .Pa /usr/src ,
 a setting of
 .Dq Fl M Pa /usr/obj
 will place build-time files under
 .Pa /usr/obj/usr/src/bin ,
 .Pa /usr/obj/usr/src/lib ,
 .Pa /usr/obj/usr/src/usr.bin ,
 and so forth.
 .Pp
 If a relative path is specified, it will be converted to an
 absolute path before being used.
 .Sy build.sh
 imposes the restriction that the argument to the
 .Fl M
 option must not begin with a
 .Dq \&$
 (dollar sign)
 character; otherwise it would be too difficult
 to determine whether the value is an absolute or a relative path.
 If the directory does not already exist,
 .Sy build.sh
 will create it.
+.
 .It Fl m Ar mach
 Set the value of
 .Sy MACHINE
 to
 .Ar mach ,
 unless the
 .Ar mach
 argument is an alias that refers to a
 .Sy MACHINE Ns No / Ns Sy MACHINE_ARCH
 pair, in which case both
 .Sy MACHINE
 and
 .Sy MACHINE_ARCH
 are set from the alias.
 Such aliases are interpreted entirely by
 .Sy build.sh ;
 they are not used by any other part of the build system.
 The
 .Sy MACHINE_ARCH
 setting implied by
 .Ar mach
 will override any value of
 .Sy MACHINE_ARCH
 in the process environment, but will not override a value set by the
 .Fl a
 option.
 All cross builds require
 .Fl m ,
 but if unset on a NetBSD host, the host's value of MACHINE will be
 detected and used automatically.
 .Pp
 See the
 .Cm list-arch
 operation for a way to get a list of valid
 .Sy MACHINE
 and
 .Sy MACHINE_ARCH
 settings.
+.
 .It Fl N Ar noiselevel
 Set the
 .Dq noisyness
 level of the build, by setting
 .Sy MAKEVERBOSE
 to
 .Ar noiselevel .
+.
 .It Fl n
 Show the commands that would be executed by
 .Sy build.sh ,
 but do not make any changes.
 This is similar in concept to
 .Dq make -n .
+.
 .It Fl O Ar obj
 Create an appropriate transform macro for
 .Sy MAKEOBJDIR
 that will place the built object files under
 .Ar obj .
 Unsets
 .Sy MAKEOBJDIRPREFIX .
 .Pp
 For instance, a setting of
 .Dq Fl O Pa /usr/obj
 will place build-time files under
 .Pa /usr/obj/bin ,
 .Pa /usr/obj/lib ,
 .Pa /usr/obj/usr.bin ,
 and so forth.
 .Pp
 If a relative path is specified, it will be converted to an
 absolute path before being used.
 .Sy build.sh
 imposes the restriction that the argument to the
 .Fl O
 option must not contain a
 .Dq \&$
 (dollar sign)
 character.
 If the directory does not already exist,
 .Sy build.sh
 will create it.
 .Pp
 In normal use, exactly one of the
 .Fl M
 or
 .Fl O
 options should be specified.
 If neither
 .Fl M
 nor
 .Fl O
 is specified, then a default object directory will be chosen
 according to rules in
 .Aq bsd.obj.mk .
 Relying on this default is not recommended because
 it is determined by complex rules that are influenced
 by the values of several variables and
 by the location of the source directory.
 .Pp
 .Em Note :
 Placing the
 .Ar obj
 directory location outside of the default source tree hierarchy makes
 it easier to manually clear out old files in the event the
 .Dq make cleandir
 operation is unable to do so.
 (See
 .Sx CAVEATS
 below.)
 .Pp
 .Em Note :
 The use of one of
 .Fl M
 or
 .Fl O
 is the only means of building multiple machine architecture userlands
 from the same source tree without cleaning between builds (in which
 case, one would specify distinct
 .Ar obj
 locations for each).
+.
 .It Fl o
 Set the value of
 .Sy MKOBJDIRS
 to
 .Dq no .
 Otherwise, it will be automatically set to
 .Dq yes .
 This default is opposite to the behaviour when not using
 .Sy build.sh .
+.
 .It Fl P
 Set the value of
 .Sy MKREPRO
 and
 .Sy MKREPRO_TIMESTAMP
 to the latest source CVS timestamp for reproducible builds.
+.
 .It Fl R Ar rel
 Set the value of
 .Sy RELEASEDIR
 to
 .Ar rel .
 If a relative path is specified, it will be converted to an
 absolute path before being used.
+.
 .It Fl r
 Remove the contents of
 .Sy DESTDIR
 and
 .Sy TOOLDIR
 before building (provides a clean starting point).
 This will skip deleting
 .Sy DESTDIR
 if building on a native system to the root directory.
+.
 .It Fl S Ar seed
 Change the value of
 .Sy BUILDSEED
 to
 .Ar seed .
 This should rarely be necessary.
+.
 .It Fl T Ar tools
 Set the value of
 .Sy TOOLDIR
 to
 .Ar tools .
 If a relative path is specified, it will be converted to an
 absolute path before being used.
 If set, the bootstrap
 .Dq make
 will only be rebuilt if the source files for
 .Xr make 1
 have changed.
+.
 .It Fl U
 Set
 .Sy MKUNPRIVED=yes .
+.
 .It Fl u
 Set
 .Sy MKUPDATE=yes .
+.
 .It Xo
 .Fl V
 .Sm off
 .Ar var
 .Li =
 .Op Ar value
 .Sm on
 .Xc
 Set the environment variable
 .Ar var
 to an optional
 .Ar value .
 This is propagated to the
 .Sy \*[toolprefix]make
 wrapper.
+.
 .It Fl w Ar wrapper
 Create the
 .Sy \*[toolprefix]make
 wrapper script (see below) in a custom location,
 specified by
 .Ar wrapper .
 This allows, for instance, to place the wrapper in
 .Sy PATH
 automatically.
 .Pp
 .Em Note :
 .Ar wrapper
 is the full name of the file, not just a directory name.
 If a relative path is specified, it will be converted to an
 absolute path before being used.
+.
 .It Fl X Ar x11src
 Set the value of
 .Sy X11SRCDIR
 to
 .Ar x11src .
 If a relative path is specified, it will be converted to an
 absolute path before being used.
+.
 .It Fl x
 Set
 .Sy MKX11=yes .
+.
 .It Fl Z Ar var
 Unset ("zap") the environment variable
 .Ar var .
 This is propagated to the
 .Sy \*[toolprefix]make
 wrapper.
+.
 .It Fl ?
 Show a help message, and exit.
+.
 .El
+.
 .Ss The \*q\*[toolprefix]make-MACHINE\*q wrapper script
+.
 If using the
 .Sy build.sh
 script to build
 .Nx ,
+a
 .Sy \*[toolprefix]make-MACHINE
 script will be created in
 .Sy TOOLDIR Ns Pa /bin
 upon the first build to assist in building subtrees on a cross-compile
 host.
 .Pp
 .Sy \*[toolprefix]make-MACHINE
 can be invoked in lieu of
 .Xr make 1 ,
 and will instead call the up-to-date version of
 .Dq \*[toolprefix]make
 installed into
 .Sy TOOLDIR Ns Pa /bin
 with several key variables pre-set, including
 .Sy MACHINE , MACHINE_ARCH ,
 and
 .Sy TOOLDIR .
 .Sy \*[toolprefix]make-MACHINE
 will also set variables specified with
 .Fl V ,
 and unset variables specified with
 .Fl Z .
 .Pp
 This script can be symlinked into a directory listed in
 .Sy PATH ,
 or called with an absolute path.
+.
 .Sh EXAMPLES
+.
 .Bl -enum
+.
 .It
 .Li "% ./build.sh [OPTIONS] tools kernel=GENERIC"
 .Pp
 Build a new toolchain, and use the new toolchain to
 configure and build a new GENERIC kernel.
+.
 .It
 .Li "% ./build.sh [OPTIONS] -U distribution"
 .Pp
 Using unprivileged mode,
 build a complete distribution to a
 .Sy DESTDIR
 directory that
 .Sy build.sh
 selects (and will show).
+.
 .It
 .Li "# ./build.sh [OPTIONS] -U install=/"
 .Pp
 As root, install to
 .Pa /
 the distribution that was built
 by example 2.
 Even though this is run as root,
 .Fl U
 is required so that the permissions stored in
 .Sy DESTDIR Ns Pa /METALOG
 are correctly applied to the files as they're copied to
 .Pa / .
+.
 .It
 .Li "% ./build.sh [OPTIONS] -U -u release"
 .Pp
 Using unprivileged mode,
 build a complete release to
 .Sy DESTDIR
 and
 .Sy RELEASEDIR
 directories that
 .Sy build.sh
 selects (and will show).
 .Sy MKUPDATE=yes
 .Pq Fl u
 is set to prevent the
 .Dq make cleandir ,
 so that if this is run after example 2, it doesn't need to redo that
 portion of the release build.
 .El
+.
 .Sh OBSOLETE VARIABLES
+.
 .Bl -tag -width "NBUILDJOBS"
+.
 .It Sy NBUILDJOBS
 Use the
 .Nm build.sh
 and
 .Xr make 1
 option
 .Fl j
 instead.
+.
 .It Sy USE_NEW_TOOLCHAIN
 The new toolchain is now the default.
 To disable, use
 .Sy TOOLCHAIN_MISSING=yes .
 .El
 .Sh SEE ALSO
 .Xr ar 1 ,
 .Xr config 1 ,
 .Xr ctags 1 ,
 .Xr cvs 1 ,
 .Xr cvslatest 1 ,
 .Xr ex 1 ,
 .Xr g++ 1 ,
 .Xr gzip 1 ,
 .Xr ident 1 ,
 .Xr ld 1 ,
 .Xr lint 1 ,
 .Xr make 1 ,
 .Xr mkisofs 1 ,
 .Xr sh 1 ,
 .Xr uname 1 ,
 .Xr vi 1 ,
 .Xr options 4 ,
 .Xr mk.conf 5 ,
 .Xr atf 7 ,
 .Xr hier 7 ,
 .Xr release 7 ,
 .Xr sysctl 7 ,
 .Xr etcupdate 8 ,
 .Xr installboot 8 ,
 .Xr mount 8 ,
 .Xr mtree 8 ,
 .Xr postinstall 8 ,
 .Xr sysinst 8 ,
 .Pa pkgsrc/sysutils/cdrtools
+.
 .Sh HISTORY
+.
 The
 .Nm build.sh
 based build scheme was introduced for
 .Nx 1.6
 as
 .Sy USE_NEW_TOOLCHAIN ,
 and re-worked to
 .Sy TOOLCHAIN_MISSING
 after that.
+.
 .Sh CAVEATS
+.
 After significant updates to third-party components in the source
 tree, the
 .Dq make cleandir
 operation may be insufficient to clean out old files in object
 directories.
 Instead, one may have to manually remove the files.
 Consult the
 .Pa UPDATING
 file for notices concerning this.

 @@ -1,121 +1,121 @@
-#	$NetBSD: Makefile.params,v 1.22 2021/02/14 18:45:44 pgoyette Exp $
+#	$NetBSD: Makefile.params,v 1.23 2023/06/11 10:43:51 lukem Exp $
+#
 # Makefile fragment for printing build parameters.
+#
 # Public variables:
 #	RELEASEVARS
 #		List of variables whose value should be printed.
+#
 #	PRINT_PARAMS
 #		A command to print the desired variables and values
 #		to stdout, without any additional debugging information.
 #		Values are printed as single-quoted strings, with
 #		embedded quotes and newlines escaped in a way that's
 #		acceptable to sh(1).  Undefined values are printed
 #		as "(undefined)" (without quotation marks).
+#
 # Internal targets:
 # 	_params:
 #		Prints the names and values of all the variables
 #		listed in ${RELEASEVARS}.  The desired results may be
 #		redirected somewhere other than stdout, for example by
 #		setting _params_redirect='>&3'.	 stdout and stderr may
 #		contain unwanted debugging information, from make and
 #		the shell.
+#
 # Internal variables:
 #	_params_redirect:
 #		If set, this should be a shell redirection specification, such
 #		as '>&3', controlling where the output from "make _params" will
 #		be sent.
+#
 # Example:
 #	. ${NETBSDSRCDIR}/etc/Makefile.params
 #	show-params: .MAKE .PHONY # print params to stdout
 #		@${PRINT_PARAMS}
+#
 .include <bsd.own.mk>	# for some variables
 RELEASEVARS=	DISTRIBVER EXTERNAL_TOOLCHAIN HAVE_GCC HAVE_GDB \
 		HAVE_LLVM HAVE_PCC INSTALLWORLDDIR \
 		MACHINE MACHINE_ARCH \
 		NETBSD_OFFICIAL_RELEASE NOCLEANDIR NODISTRIBDIRS NOINCLUDES \
 		TOOLCHAIN_MISSING \
 		USE_HESIOD USE_INET6 USE_JEMALLOC USE_KERBEROS USE_LDAP \
 		USE_PAM USE_SKEY USE_YP \
 		USETOOLS
 .if ${MKREPRO:Uno} != "yes"
 RELEASEVARS+= 	BSDOBJDIR BSDSRCDIR BUILDID BUILDINFO BUILDSEED \
 		DESTDIR KERNARCHDIR KERNCONFDIR KERNOBJDIR KERNSRCDIR MAKE \
 		KERNEL_DIR MAKECONF MAKEFLAGS MAKEOBJDIR MAKEOBJDIRPREFIX \
-		MAKEVERBOSE NBUILDJOBS NETBSDSRCDIR OBJMACHINE OBJMACHINE_ARCH \
+		MAKEVERBOSE NETBSDSRCDIR OBJMACHINE OBJMACHINE_ARCH \
 		RELEASEDIR RELEASEMACHINEDIR TOOLDIR USR_OBJMACHINE X11SRCDIR
 .endif
 RELEASEVARS+= ${_MKVARS.yes} ${_MKVARS.no}
+#
 # Duplicate the DISTRIBVER setting from src/etc/Makefile.
+#
 .ifndef DISTRIBVER
 DISTRIBVER!=	${HOST_SH} ${NETBSDSRCDIR}/sys/conf/osrelease.sh
 .endif
+#
 # _params does the printing.
+#
 _params_redirect?= # empty
 _params: .PHONY
 .for var in ${RELEASEVARS:O}
 .if defined(${var})
 	@printf "%20s = '%-s'\n" ${var} ${${var}:C/'/'\\\\''/gW:Q} \
 	    ${_params_redirect}
 .else
 	@printf "%20s = (undefined)\n" ${var} \
 	    ${_params_redirect}
 .endif
 .endfor
 # PRINT_PARAMS:
+#
 # The output from the "make _params" can include the following types of
 # unwanted lines:
+#
 #     make -j prints "--- _params ---";
+#
 #     if MAKEVERBOSE is set to 3 or more then make prints each "printf"
 #     command in addition to executing it;
+#
 #     if MAKEVERBOSE is set to 4 then the shell prints each command
 #     (prefixed with "+").
+#
 # So the resulting output can look like this:
+#
 #	--- _params ---
 #	+ echo 'printf "%20s = '\''%-s'\''\n" BSDOBJDIR /usr/obj'
 #	printf "%20s = '%-s'\n" BSDOBJDIR /usr/obj
 #	+ printf '%20s = '\''%-s'\''\n' BSDOBJDIR /usr/obj
 #	           BSDOBJDIR = '/usr/obj'
 #	+ echo 'printf "%20s = '\''%-s'\''\n" BSDSRCDIR /usr/src'
 #	printf "%20s = '%-s'\n" BSDSRCDIR /usr/src
 #	+ printf '%20s = '\''%-s'\''\n' BSDSRCDIR /usr/src
 #	           BSDSRCDIR = '/usr/src'
 #	[...]
+#
 # where what we want is just this:
+#
 #	           BSDOBJDIR = '/usr/obj'
 #	           BSDSRCDIR = '/usr/src'
 #	           [...]
+#
 # The shell redirections in ${PRINT_PARAMS} ensure that the unwanted
 # noise is discarded (via ">/dev/null"), while the desired information
 # ends up on the subshell's stdout (via ">&3" and "3>&1").  The value
 # of _params_redirect is passed in the environment instead of on the
 # command line, to prevent it from appearing in MAKEFLAGS (which would
 # appear in the output).
+#
 PRINT_PARAMS:=	(_params_redirect='>&3' ${MAKE} -f ${.PARSEDIR:Q}/${.PARSEFILE:Q} _params 3>&1 >/dev/null)