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Revision 1.100, Fri May 25 10:47:25 2012 UTC (7 years ago) by wiz
Branch: MAIN
Changes since 1.99: +511 -499 lines

Document MKREPRO using joerg's wording.

BUILDING(8)                 System Manager's Manual                BUILDING(8)

NNAAMMEE
     BBUUIILLDDIINNGG -- Procedure for building NetBSD from source code.

RREEQQUUIIRREEMMEENNTTSS
     NetBSD is designed to be buildable on most POSIX-compliant host systems.
     The basic build procedure is the same whether compiling _n_a_t_i_v_e_l_y (on the
     same NetBSD architecture) or _c_r_o_s_s _c_o_m_p_i_l_i_n_g (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 (mmaakkee 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.)

FFIILLEESS
   SSoouurrccee ttrreeee llaayyoouutt
     ddoocc//BBUUIILLDDIINNGG..mmddoocc
                    This document (in -mdoc troff format; the original copy).

     BBUUIILLDDIINNGG       This document (in plaintext).

     ttoooollss//ccoommppaatt//RREEAADDMMEE
                    Special notes for cross-hosting a NetBSD build on non-
                    NetBSD platforms.

     MMaakkeeffiillee       The main Makefile for NetBSD; should only be run for
                    native builds with an appropriately up-to-date version of
                    NetBSD make(1).  (For building from out-of-date systems or
                    on a non-native host, see the bbuuiilldd..sshh shell script.)

     UUPPDDAATTIINNGG       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.

     bbuuiilldd..sshh       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) for any source tree that is updated and
                    recompiled regularly.

     ccrryyppttoo//ddiisstt//, ddiisstt//, ggnnuu//ddiisstt//
                    Sources imported verbatim from third parties, without
                    mangling the existing build structure.  Other source trees
                    in bbiinn through uussrr..ssbbiinn use the NetBSD make(1)
                    ``reachover'' Makefile semantics when building these
                    programs for a native host.

     ddiissttrriibb//, eettcc//
                    Sources for items used when making a full release
                    snapshot, such as files installed in DDEESSTTDDIIRR_/_e_t_c on the
                    destination system, boot media, and release notes.

     tteessttss//, rreeggrreessss//
                    Regression test harness.  Can be cross-compiled, but only
                    run natively.  _t_e_s_t_s_/ uses the atf(7) test framework;
                    _r_e_g_r_e_s_s_/ contains older tests that have not yet been
                    migrated to atf(7).

     ssyyss//           NetBSD kernel sources.

     ttoooollss//         ``Reachover'' build structure for the host build tools.
                    This has a special method of determining out-of-date
                    status.

     bbiinn// ...... uussrr..ssbbiinn//
                    Sources to the NetBSD userland (non-kernel) programs.  If
                    any of these directories are missing, they will be skipped
                    during the build.

     xx1111//           ``Reachover'' build structure for X11R6; the source is in
                    XX1111SSRRCCDDIIRR.

   BBuuiilldd ttrreeee llaayyoouutt
     The NetBSD build tree is described in hier(7), and the release layout is
     described in release(7).

CCOONNFFIIGGUURRAATTIIOONN
   EEnnvviirroonnmmeenntt vvaarriiaabblleess
     Several environment variables control the behaviour of NetBSD builds.

     HHOOSSTT__SSHH           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
                       _/_b_i_n_/_s_h, _/_u_s_r_/_x_p_g_4_/_b_i_n_/_s_h, _/_b_i_n_/_k_s_h (provided it is a
                       variant of ksh that supports the ``local'' keyword,
                       such as ksh88, but not ksh93), or _/_u_s_r_/_l_o_c_a_l_/_b_i_n_/_b_a_s_h.

                       Most parts of the build require HHOOSSTT__SSHH to be an
                       absolute path; however, bbuuiilldd..sshh allows it to be a
                       simple command name, which will be converted to an
                       absolute path by searching the PPAATTHH.

     HHOOSSTT__CCCC           Path name to C compiler used to create the toolchain.

     HHOOSSTT__CCXXXX          Path name to C++ compiler used to create the toolchain.

     MMAACCHHIINNEE           Machine type, e.g., ``macppc''.

     MMAACCHHIINNEE__AARRCCHH      Machine architecture, e.g., ``powerpc''.

     MMAAKKEE              Path name to invoke make(1) as.

     MMAAKKEEFFLLAAGGSS         Flags to invoke make(1) with.  Note that bbuuiilldd..sshh
                       ignores the value of MMAAKKEEFFLLAAGGSS passed in the
                       environment, but allows MMAAKKEEFFLLAAGGSS to be set via the --VV
                       option.

     MMAAKKEEOOBBJJDDIIRR        Directory to use as the ..OOBBJJDDIIRR 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 ..OOBBJJDDIIRR from the value of ..CCUURRDDIIRR.  Used only
                       if MMAAKKEEOOBBJJDDIIRRPPRREEFFIIXX is not defined.  MMAAKKEEOOBBJJDDIIRR can be
                       provided only in the environment or via the --OO flag of
                       bbuuiilldd..sshh; it cannot usefully be set inside a Makefile,
                       including _m_k_._c_o_n_f or $${{MMAAKKEECCOONNFF}}.

     MMAAKKEEOOBBJJDDIIRRPPRREEFFIIXX  Top level directory of the object directory tree.  The
                       value is subjected to variable expansion by make(1).
                       bbuuiilldd..sshh will create the ${MAKEOBJDIRPREFIX} directory
                       if necessary, but if make(1) is used without bbuuiilldd..sshh,
                       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 ..OOBBJJDDIIRR
                       for the current directory.  The current directory may
                       be read only.  MMAAKKEEOOBBJJDDIIRRPPRREEFFIIXX can be provided only in
                       the environment or via the --MM flag of bbuuiilldd..sshh; it
                       cannot usefully be set inside a Makefile, including
                       _m_k_._c_o_n_f or $${{MMAAKKEECCOONNFF}}.

   ""mmaakkee"" vvaarriiaabblleess
     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 specified by MMAAKKEECCOONNFF.

     BBUUIILLDDIIDD     Identifier for the build.  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.

     BBUUIILLDDSSEEEEDD   GCC uses random numbers when compiling C++ code.  This
                 variable seeds the gcc random number generator using the
                 -frandom-seed flag 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 GCC documentation of
                 -frandom-seed.

     DDEESSTTDDIIRR     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 //uussrr//iinncclluuddee,
                 //uussrr//lliibb, and so forth.  This pathname must be an absolute
                 path, and should _n_o_t end with a slash (/) character.  (For
                 installation into the system's root directory, set DDEESSTTDDIIRR to
                 an empty string, not to ``/'').  The directory must reside on
                 a file system which supports long file names and hard links.

                 _D_e_f_a_u_l_t: Empty string if UUSSEETTOOOOLLSS is ``yes''; unset
                 otherwise.

                 _N_o_t_e: bbuuiilldd..sshh will provide a default of _d_e_s_t_d_i_r_.MMAACCHHIINNEE (in
                 the top-level ..OOBBJJDDIIRR) unless run in `expert' mode.

     MMAAKKEECCOONNFF    The name of the make(1) configuration file.  _O_n_l_y _s_e_t_t_a_b_l_e _i_n
                 _t_h_e _p_r_o_c_e_s_s _e_n_v_i_r_o_n_m_e_n_t_.

                 _D_e_f_a_u_l_t: ``/etc/mk.conf''

     MMAAKKEEVVEERRBBOOSSEE
                 Level of verbosity of status messages.  Supported values:

                 0    No descriptive messages or commands executed by make(1)
                      are shown.

                 1    Brief messages are shown describing what is being done,
                      but the actual commands executed by make(1) are not
                      displayed.

                 2    Descriptive messages are shown as above (prefixed with a
                      `#'), and ordinary commands performed by make(1) are
                      displayed.

                 3    In addition to the above, all commands performed by
                      make(1) are displayed, even if they would ordinarily
                      have been hidden through use of the ``@'' prefix in the
                      relevant makefile.

                 4    In addition to the above, commands executed by make(1)
                      are traced through use of the sh(1) ``--xx'' flag.

                 _D_e_f_a_u_l_t: 2

     MMKKCCAATTPPAAGGEESS  Can be set to ``yes'' or ``no''.  Indicates whether
                 preformatted plaintext manual pages will be created during a
                 build.

                 _D_e_f_a_u_l_t: ``yes''

     MMKKCCRRYYPPTTOO    Can be set to ``yes'' or ``no''.  Indicates whether
                 cryptographic code will be included in a build; provided for
                 the benefit of countries that do not allow strong
                 cryptography.  Will not affect use of the standard low-
                 security password encryption system, crypt(3).

                 _D_e_f_a_u_l_t: ``yes''

     MMKKDDOOCC       Can be set to ``yes'' or ``no''.  Indicates whether system
                 documentation destined for DDEESSTTDDIIRR_/_u_s_r_/_s_h_a_r_e_/_d_o_c will be
                 installed during a build.

                 _D_e_f_a_u_l_t: ``yes''

     MMKKHHTTMMLL      Can be set to ``yes'' or ``no''.  Indicates whether
                 preformatted HTML manual pages will be built and installed

                 _D_e_f_a_u_l_t: ``yes''

     MMKKHHOOSSTTOOBBJJ   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.

                 _D_e_f_a_u_l_t: ``no''

     MMKKIINNFFOO      Can be set to ``yes'' or ``no''.  Indicates whether GNU Info
                 files, used for the documentation for most of the compilation
                 tools, will be created and installed during a build.

                 _D_e_f_a_u_l_t: ``yes''

     MMKKKKMMOODD      Can be set to ``yes'' or ``no''.  Indicates whether kernel
                 modules are built and installed.

                 _D_e_f_a_u_l_t: ``yes''

     MMKKLLIINNTT      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
                 DDEESSTTDDIIRR_/_u_s_r_/_l_i_b_d_a_t_a_/_l_i_n_t.

                 _D_e_f_a_u_l_t: ``yes''

     MMKKMMAANN       Can be set to ``yes'' or ``no''.  Indicates whether manual
                 pages will be installed during a build.

                 _D_e_f_a_u_l_t: ``yes''

     MMKKNNLLSS       Can be set to ``yes'' or ``no''.  Indicates whether Native
                 Language System locale zone files will be compiled and
                 installed during a build.

                 _D_e_f_a_u_l_t: ``yes''

     MMKKOOBBJJ       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.

                 _D_e_f_a_u_l_t: ``yes''

                 Note that setting MMKKOOBBJJ to ``no'' is not recommended and may
                 cause problems when updating the tree with cvs(1).

     MMKKPPIICC       Can be set to ``yes'' or ``no''.  Indicates whether shared
                 objects and libraries will be created and installed during a
                 build.  If set to ``no'', the entire built system will be
                 statically linked.

                 _D_e_f_a_u_l_t: Platform dependent.  As of this writing, all
                 platforms except sshh33 default to ``yes''.

     MMKKPPIICCIINNSSTTAALLLL
                 Can be set to ``yes'' or ``no''.  Indicates whether the ar(1)
                 format libraries (lliibb**__ppiicc..aa), used to generate shared
                 libraries, are installed during a build.

                 _D_e_f_a_u_l_t: ``yes''

     MMKKPPRROOFFIILLEE   Can be set to ``yes'' or ``no''.  Indicates whether profiled
                 libraries (lliibb**__pp..aa) will be built and installed during a
                 build.

                 _D_e_f_a_u_l_t: ``yes''; however, some platforms turn off MMKKPPRROOFFIILLEE
                 by default at times due to toolchain problems with profiled
                 code.

     MMKKRREEPPRROO     Can be set to ``yes'' or ``no''.  Create reproducable builds.
                 This enables different switches to make two builds from the
                 same source tree result in the same build results.

                 _D_e_f_a_u_l_t: ``no''

     MMKKSSHHAARREE     Can be set to ``yes'' or ``no''.  Indicates whether files
                 destined to reside in DDEESSTTDDIIRR_/_u_s_r_/_s_h_a_r_e will be built and
                 installed during a build.  If set to ``no'', then all of
                 MMKKCCAATTPPAAGGEESS, MMKKDDOOCC, MMKKIINNFFOO, MMKKMMAANN, and MMKKNNLLSS will be set to
                 ``no'' unconditionally.

                 _D_e_f_a_u_l_t: ``yes''

     MMKKSSTTRRIIPPIIDDEENNTT
                 Can be set to ``yes'' or ``no''.  Indicates whether program
                 binaries and shared libraries should be built to include RCS
                 IDs for use with ident(1).

                 _D_e_f_a_u_l_t: ``no''

     MMKKUUNNPPRRIIVVEEDD  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 _M_E_T_A_L_O_G in DDEESSTTDDIIRR.  The contents of _M_E_T_A_L_O_G are used
                 during the generation of the distribution tar files to ensure
                 that the appropriate file ownership is stored.

                 _D_e_f_a_u_l_t: ``no''

     MMKKUUPPDDAATTEE    Can be set to ``yes'' or ``no''.  Indicates whether all
                 install operations intended to write to DDEESSTTDDIIRR will compare
                 file timestamps before installing, and skip the install phase
                 if the destination files are up-to-date.  This also has
                 implications on full builds (see next subsection).

                 _D_e_f_a_u_l_t: ``no''

     MMKKXX1111       Can be set to ``yes'' or ``no''.  Indicates whether X11 is
                 built from XX1111SSRRCCDDIIRR.

                 _D_e_f_a_u_l_t: ``no''

     TTOOOOLLDDIIRR     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 TTOOOOLLDDIIRR; 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 ..OOBBJJDDIIRR of _s_r_c.

                 _D_e_f_a_u_l_t: Unset.

     UUSSEETTOOOOLLSS    Indicates whether the tools specified by TTOOOOLLDDIIRR should be
                 used as part of a build in progress.  Must be set to ``yes''
                 if cross-compiling.

                 yyeess    Use the tools from TTOOOOLLDDIIRR.

                 nnoo     Do not use the tools from TTOOOOLLDDIIRR, but refuse to build
                        native compilation tool components that are version-
                        specific for that tool.

                 nneevveerr  Do not use the tools from TTOOOOLLDDIIRR, even when building
                        native tool components.  This is similar to the
                        traditional NetBSD build method, but does _n_o_t 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.

                 _D_e_f_a_u_l_t: ``yes'', unless TTOOOOLLCCHHAAIINN__MMIISSSSIINNGG is set to ``yes''.

                 UUSSEETTOOOOLLSS is also set to ``no'' when using <bsd.*.mk> outside
                 the NetBSD source tree.

     XX1111SSRRCCDDIIRR   Directory containing the X11R6 source.  If specified, must be
                 an absolute path.  The main X11R6 source is found in
                 XX1111SSRRCCDDIIRR_/_x_f_r_e_e_/_x_c.

                 _D_e_f_a_u_l_t: NNEETTBBSSDDRRCCDDIIRR_/_._._/_x_s_r_c, if that exists; otherwise
                 _/_u_s_r_/_x_s_r_c.

     XX1111FFLLAAVVOOUURR  The style of X11 cross-built, set to either ``Xorg'' or
                 ``XFree86''.

                 _D_e_f_a_u_l_t: ``Xorg'' on amd64, i386, macppc, shark and sparc64
                 platforms, ``XFree86'' on everything else.

   ""mmaakkee"" vvaarriiaabblleess ffoorr ffuullll bbuuiillddss
     These variables only affect the top level ``Makefile'' and do not affect
     manually building subtrees of the NetBSD source code.

     IINNSSTTAALLLLWWOORRLLDDDDIIRR  Location for the ``make installworld'' target to install
                      to.  If specified, must be an absolute path.

                      _D_e_f_a_u_l_t: ``/''

     MMKKOOBBJJDDIIRRSS        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.

                      _D_e_f_a_u_l_t: ``no''

                      If using bbuuiilldd..sshh, the default is ``yes''.  This may be
                      set back to ``no'' by giving bbuuiilldd..sshh the --oo option.

     MMKKUUPPDDAATTEE         Can be set to ``yes'' or ``no''.  If set, then in
                      addition to the effects described for MMKKUUPPDDAATTEE==yyeess
                      above, this implies the effects of NNOOCCLLEEAANNDDIIRR (i.e.,
                      ``make cleandir'' is avoided).

                      _D_e_f_a_u_l_t: ``no''

                      If using bbuuiilldd..sshh, this may be set by giving the --uu
                      option.

     NNBBUUIILLDDJJOOBBSS       Now obsolete.  Use the make(1) option --jj, instead.  See
                      below.

                      _D_e_f_a_u_l_t: Unset.

     NNOOCCLLEEAANNDDIIRR       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.

                      _D_e_f_a_u_l_t: Unset.

                      See also MMKKUUPPDDAATTEE.

     NNOODDIISSTTRRIIBBDDIIRRSS    If set, avoids the ``make distrib-dirs'' phase of a full
                      build.  This skips running mtree(8) on DDEESSTTDDIIRR, useful
                      on systems where building as an unprivileged user, or
                      where it is known that the system-wide mtree files have
                      not changed.

                      _D_e_f_a_u_l_t: Unset.

     NNOOIINNCCLLUUDDEESS       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
                      MMKKUUPPDDAATTEE==yyeess instead in that case.

                      _D_e_f_a_u_l_t: Unset.

     RREELLEEAASSEEDDIIRR       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.

                      _D_e_f_a_u_l_t: Unset.

                      _N_o_t_e: bbuuiilldd..sshh will provide a default of _r_e_l_e_a_s_e_d_i_r (in
                      the top-level ..OOBBJJDDIIRR) unless run in `expert' mode.

BBUUIILLDDIINNGG
   ""mmaakkee"" ccoommmmaanndd lliinnee ooppttiioonnss
     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.

     --jj _n_j_o_b    Run up to _n_j_o_b make(1) subjobs in parallel.  Makefiles should
                use .WAIT or have explicit dependencies as necessary to
                enforce build ordering.

     --mm _d_i_r     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
                bbuuiilldd..sshh.

     --nn         Display the commands that would have been executed, but do not
                actually execute them.  This will still cause recursion to
                take place.

     --VV _v_a_r     Print make(1)'s idea of the value of _v_a_r.  Does not build any
                targets.

     _v_a_r_=_v_a_l_u_e  Set the variable _v_a_r to _v_a_l_u_e, overriding any setting
                specified by the process environment, the MMAAKKEECCOONNFF
                configuration file, or the system Makefile segments.

   ""mmaakkee"" ttaarrggeettss
     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.

     aallll        Build programs, libraries, and preformatted documentation.

     cclleeaann      Remove program and library object code files.

     cclleeaannddiirr   Same as cclleeaann, but also remove preformatted documentation,
                dependency files generated by ``make depend'', and any other
                files known to be created at build time.

     ddeeppeenndd     Create dependency files (..ddeeppeenndd) containing more detailed
                information about the dependencies of source code on header
                files.  Allows programs to be recompiled automatically when a
                dependency changes.

     ddeeppeennddaallll  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.

     ddiissttcclleeaann  Synonym for cclleeaannddiirr.

     iinncclluuddeess   Build and install system header files.  Typically needed
                before any system libraries or programs can be built.

     iinnssttaallll    Install programs, libraries, and documentation into DDEESSTTDDIIRR.
                Few files will be installed to DDEESSTTDDIIRR_/_d_e_v, DDEESSTTDDIIRR_/_e_t_c,
                DDEESSTTDDIIRR_/_r_o_o_t or DDEESSTTDDIIRR_/_v_a_r in order to prevent user supplied
                configuration data from being overwritten.

     lliinntt       Run lint(1) against the C source code, where appropriate, and
                generate system-installed lint libraries.

     oobbjj        Create object directories to be used for built files, instead
                of building directly in the source tree.

     ttaaggss       Create ctags(1) searchable function lists usable by the ex(1)
                and vi(1) text editors.

   ""mmaakkee"" ttaarrggeettss ffoorr tthhee ttoopp lleevveell
     Additional make(1) targets are usable specifically from the top source
     level to facilitate building the entire NetBSD source tree.

     bbuuiilldd         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.

     ddiissttrriibbuuttiioonn  Do a ``make build'', and then install a full distribution
                   (which does not include a kernel) into DDEESSTTDDIIRR, including
                   files in DDEESSTTDDIIRR_/_d_e_v, DDEESSTTDDIIRR_/_e_t_c, DDEESSTTDDIIRR_/_r_o_o_t and
                   DDEESSTTDDIIRR_/_v_a_r.

     bbuuiillddwwoorrlldd    As per ``make distribution'', except that it ensures that
                   DDEESSTTDDIIRR is not the root directory.

     iinnssttaallllwwoorrlldd  Install the distribution from DDEESSTTDDIIRR to IINNSSTTAALLLLWWOORRLLDDDDIIRR,
                   which defaults to the root directory.  Ensures that
                   IINNSSTTAALLLLWWOORRLLDDDDIIRR is not the root directory if cross
                   compiling.

                   The IINNSSTTAALLLLSSEETTSS 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 IINNSSTTAALLLLWWOORRLLDDDDIIRR_/_e_t_c will not be
                   installed or modified.

                   _N_o_t_e: Before performing this operation with
                   IINNSSTTAALLLLWWOORRLLDDDDIIRR=_/, 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 IINNSSTTAALLLLWWOORRLLDDDDIIRR_/_e_t_c and that you use
                   postinstall(8) to check for inconsistencies (and possibly
                   to fix them).

     sseettss          Create distribution sets from DDEESSTTDDIIRR into
                   RREELLEEAASSEEDDIIRR//RREELLEEAASSEEMMAACCHHIINNEEDDIIRR_/_b_i_n_a_r_y_/_s_e_t_s.  Should be run
                   after ``make distribution'', as ``make build'' alone does
                   not install all of the required files.

     ssoouurrcceesseettss    Create source sets of the source tree into
                   RREELLEEAASSEEDDIIRR_/_s_o_u_r_c_e_/_s_e_t_s.

     ssyyssppkkggss       Create syspkgs from DDEESSTTDDIIRR into
                   RREELLEEAASSEEDDIIRR//RREELLEEAASSEEMMAACCHHIINNEEDDIIRR_/_b_i_n_a_r_y_/_s_y_s_p_k_g_s.  Should be run
                   after ``make distribution'', as ``make build'' alone does
                   not install all of the required files.

     rreelleeaassee       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 RREELLEEAASSEEDDIIRR be
                   set (see above).

     iissoo--iimmaaggee     Create a NetBSD installation CD-ROM image in the
                   RREELLEEAASSEEDDIIRR_/_i_s_o 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 that other, smaller, CD-ROM images may be created in
                   the RREELLEEAASSEEDDIIRR//RREELLEEAASSEEMMAACCHHIINNEEDDIIRR_/_i_n_s_t_a_l_l_a_t_i_o_n_/_c_d_r_o_m
                   directory by ``make release''.  These smaller images
                   usually contain the same tools as the larger images in
                   RREELLEEAASSEEDDIIRR_/_i_s_o, but do not contain additional content such
                   as the distribution sets.

                   Note that 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 _p_k_g_s_r_c_/_s_y_s_u_t_i_l_s_/_c_d_r_t_o_o_l_s.

     iissoo--iimmaaggee--ssoouurrccee
                   Create a NetBSD installation CD-ROM image in the
                   RREELLEEAASSEEDDIIRR_/_i_s_o 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 that other, smaller, CD-ROM images may be created in
                   the RREELLEEAASSEEDDIIRR//RREELLEEAASSEEMMAACCHHIINNEEDDIIRR_/_i_n_s_t_a_l_l_a_t_i_o_n_/_c_d_r_o_m
                   directory by ``make release''.  These smaller images
                   usually contain the same tools as the larger images in
                   RREELLEEAASSEEDDIIRR_/_i_s_o, but do not contain additional content such
                   as the distribution sets.

                   Note that 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 _p_k_g_s_r_c_/_s_y_s_u_t_i_l_s_/_c_d_r_t_o_o_l_s.

     iinnssttaallll--iimmaaggee
                   Create a bootable NetBSD installation disk image in the
                   RREELLEEAASSEEDDIIRR//RREELLEEAASSEEMMAACCHHIINNEEDDIIRR_/_i_n_s_t_a_l_l_a_t_i_o_n_/_i_n_s_t_a_l_l_i_m_a_g_e
                   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, RREELLEEAASSEEDDIIRR must
                   be populated by ``make release'' or equivalent.  The build
                   must have been performed with MMKKUUNNPPRRIIVVEEDD==yyeess because ``make
                   install-image'' relies on information in DDEESSTTDDIIRR_/_M_E_T_A_L_O_G.

     live-image    Create NetBSD live images in the
                   RREELLEEAASSEEDDIIRR//RREELLEEAASSEEMMAACCHHIINNEEDDIIRR_/_i_n_s_t_a_l_l_a_t_i_o_n_/_l_i_v_e_i_m_a_g_e
                   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 MMKKUUNNPPRRIIVVEEDD==yyeess because ``make
                   install-image'' relies on information in DDEESSTTDDIIRR_/_M_E_T_A_L_O_G.

     rreeggrreessssiioonn--tteessttss
                   Can only be run after building the regression tests in the
                   directory ``regress''.  Runs those compiled regression
                   tests on the local host.  Note that most tests are now
                   managed instead using atf(7); this target should probably
                   run those as well but currently does not.

   TThhee ""bbuuiilldd..sshh"" ssccrriipptt
     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 HHOOSSTT__SSHH
     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 [_o_p_t_i_o_n_s]

     The above command will usually enable bbuuiilldd..sshh to automatically set
     HHOOSSTT__SSHH==_/_p_a_t_h_/_t_o_/_s_u_i_t_a_b_l_e_/_s_h_e_l_l, but if that fails, then the following
     set of commands may be used instead:

           HOST_SH=_/_p_a_t_h_/_t_o_/_s_u_i_t_a_b_l_e_/_s_h_e_l_l
           export HOST_SH
           ${HOST_SH} build.sh [_o_p_t_i_o_n_s]

     If bbuuiilldd..sshh detects that it is being executed under an unsuitable shell,
     it attempts to exec a suitable shell instead, or prints an error message.
     If HHOOSSTT__SSHH is not set explicitly, then bbuuiilldd..sshh sets a default using
     heuristics dependent on the host platform, or from the shell under which
     bbuuiilldd..sshh is executed (if that can be determined), or using the first copy
     of _s_h found in PPAATTHH.

     All cross-compile builds, and most native builds, of the entire system
     should make use of bbuuiilldd..sshh 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 bbuuiilldd..sshh, 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 bbuuiilldd..sshh are
     noted where applicable.

     The following operations are supported by bbuuiilldd..sshh:

     bbuuiilldd         Build the system as per ``make build''.  Before the main
                   part of the build commences, this command runs the oobbjj
                   operation (unless the --oo option is given), ``make
                   cleandir'' (unless the --uu option is given), and the ttoooollss
                   operation.

     ddiissttrriibbuuttiioonn  Build a full distribution as per ``make distribution''.
                   This command first runs the bbuuiilldd operation.

     rreelleeaassee       Build a full release as per ``make release''.  This command
                   first runs the ddiissttrriibbuuttiioonn operation.

     mmaakkeewwrraappppeerr   Create the nnbbmmaakkee--MMAACCHHIINNEE wrapper.  This operation is
                   automatically performed for any of the other operations.

     cclleeaannddiirr      Perform ``make cleandir''.

     oobbjj           Perform ``make obj''.

     ttoooollss         Build and install the host tools from _s_r_c_/_t_o_o_l_s.  This
                   command will first run ``make obj'' and ``make cleandir''
                   in the _t_o_o_l_s subdirectory unless the --oo or --uu options
                   (respectively) are given.

     iinnssttaallll=_i_d_i_r  Install the contents of DDEESSTTDDIIRR to _i_d_i_r, using ``make
                   installworld''.  Note that files that are part of the
                   ``etc'' or ``xetc'' sets will not be installed, unless
                   overridden by the INSTALLSETS environment variable.

     kkeerrnneell=_k_c_o_n_f  Build a new kernel.  The _k_c_o_n_f argument is the name of a
                   configuration file suitable for use by config(1).  If _k_c_o_n_f
                   does not contain any `/' characters, the configuration file
                   is expected to be found in the KKEERRNNCCOONNFFDDIIRR directory, which
                   is typically ssyyss//aarrcchh//MMAACCHHIINNEE//ccoonnff.  The new kernel will be
                   built in a subdirectory of KKEERRNNOOBBJJDDIIRR, which is typically
                   ssyyss//aarrcchh//MMAACCHHIINNEE//ccoommppiillee or an associated object directory.

                   This command does _n_o_t imply the ttoooollss command; run the
                   ttoooollss command first unless it is _c_e_r_t_a_i_n that the tools
                   already exist and are up to date.

                   This command will run ``make cleandir'' on the kernel in
                   question first unless the --uu option is given.

     mmoodduulleess       This command will build kernel modules and install them
                   into DDEESSTTDDIIRR.

     rreelleeaasseekkeerrnneell=_k_c_o_n_f
                   Install a gzip(1)ed copy of the kernel previously built by
                   kkeerrnneell=_k_c_o_n_f into
                   RREELLEEAASSEEDDIIRR//RREELLEEAASSEEMMAACCHHIINNEEDDIIRR_/_b_i_n_a_r_y_/_k_e_r_n_e_l, usually as
                   _n_e_t_b_s_d_-_k_c_o_n_f_._g_z, although the ``_n_e_t_b_s_d'' prefix is
                   determined from the ``ccoonnffiigg'' directives in _k_c_o_n_f.

     sseettss          Perform ``make sets''.

     ssoouurrcceesseettss    Perform ``make sourcesets''.

     ssyyssppkkggss       Perform ``make syspkgs''.

     iissoo--iimmaaggee     Perform ``make iso-image''.

     iissoo--iimmaaggee--ssoouurrccee
                   Perform ``make iso-image-source''.

     iinnssttaallll--iimmaaggee
                   Perform ``make install-image''.

     lliivvee--iimmaaggee    Perform ``make live-image''.

     The following command line options alter the behaviour of the bbuuiilldd..sshh
     operations described above:

     --aa _a_r_c_h   Set the value of MMAACCHHIINNEE__AARRCCHH to _a_r_c_h.

     --BB _b_u_i_l_d_i_d
               Set the value of BBUUIILLDDIIDD to _b_u_i_l_d_i_d.  This will also append the
               build identifier to the name of the ``make'' wrapper script so
               that the resulting name is of the form
               ``nnbbmmaakkee--MMAACCHHIINNEE--BBUUIILLDDIIDD''.

     --CC _c_d_e_x_t_r_a_s
               Append _c_d_e_x_t_r_a_s to the CCDDEEXXTTRRAA 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 --CC options, or via a single
               option whose argument contains multiple space-separated paths.

     --DD _d_e_s_t   Set the value of DDEESSTTDDIIRR to _d_e_s_t.  If a relative path is
               specified, it will be converted to an absolute path before
               being used.

     --EE        Set `expert' mode.  This overrides various sanity checks, and
               allows: DDEESSTTDDIIRR does not have to be set to a non-root path for
               builds, and MMKKUUNNPPRRIIVVEEDD==yyeess does not have to be set when
               building as a non-root user.

               _N_o_t_e: It is highly recommended that you know what you are doing
               when you use this option.

     --hh        Print a help message.

     --jj _n_j_o_b   Run up to _n_j_o_b make(1) subjobs in parallel; passed through to
               make(1).  If you see failures for reasons other than running
               out of memory while using bbuuiilldd..sshh with --jj, please save
               complete build logs so the failures can be analyzed.

               To achieve the fastest builds, --jj 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.

     --MM _o_b_j    Set MMAAKKEEOOBBJJDDIIRRPPRREEFFIIXX to _o_b_j.  Unsets MMAAKKEEOOBBJJDDIIRR.  See ``--OO
               --oobbjj'' for more information.

               For instance, if the source directory is _/_u_s_r_/_s_r_c, a setting of
               ``--MM _/_u_s_r_/_o_b_j'' will place build-time files under
               _/_u_s_r_/_o_b_j_/_u_s_r_/_s_r_c_/_b_i_n, _/_u_s_r_/_o_b_j_/_u_s_r_/_s_r_c_/_l_i_b,
               _/_u_s_r_/_o_b_j_/_u_s_r_/_s_r_c_/_u_s_r_._b_i_n, and so forth.

               If a relative path is specified, it will be converted to an
               absolute path before being used.  bbuuiilldd..sshh imposes the
               restriction that the argument to the --MM 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,
               bbuuiilldd..sshh will create it.

     --mm _m_a_c_h   Set the value of MMAACCHHIINNEE to _m_a_c_h, except in some special cases
               listed below.  This will also override any value of
               MMAACCHHIINNEE__AARRCCHH in the process environment with a value deduced
               from _m_a_c_h, unless --aa is specified.  All cross builds require
               --mm, but if unset on a NetBSD host, the host's value of MACHINE
               will be detected and used automatically.

               Some machines support multiple values for MMAACCHHIINNEE__AARRCCHH.  The
               following special cases for the _m_a_c_h argument are defined to
               set the listed values of MMAACCHHIINNEE and MMAACCHHIINNEE__AARRCCHH:

                     mmaacchh          MMAACCHHIINNEE    MMAACCHHIINNEE__AARRCCHH
                     evbarm        evbarm     (not set)
                     evbarm-eb     evbarm     armeb
                     evbarm-el     evbarm     arm
                     evbmips       evbmips    (not set)
                     evbmips-eb    evbmips    mipseb
                     evbmips-el    evbmips    mipsel
                     evbsh3        evbsh3     (not set)
                     evbsh3-eb     evbsh3     sh3eb
                     evbsh3-el     evbsh3     sh3el
                     sbmips        sbmips     (not set)
                     sbmips-eb     sbmips     mipseb
                     sbmips-el     sbmips     mipsel

     --NN _n_o_i_s_e_l_e_v_e_l
               Set the ``noisyness'' level of the build, by setting
               MMAAKKEEVVEERRBBOOSSEE to _n_o_i_s_e_l_e_v_e_l.

     --nn        Show the commands that would be executed by bbuuiilldd..sshh, but do
               not make any changes.  This is similar in concept to ``make
               -n''.

     --OO _o_b_j    Create an appropriate transform macro for MMAAKKEEOOBBJJDDIIRR that will
               place the built object files under _o_b_j.  Unsets
               MMAAKKEEOOBBJJDDIIRRPPRREEFFIIXX.

               For instance, a setting of ``--OO _/_u_s_r_/_o_b_j'' will place build-
               time files under _/_u_s_r_/_o_b_j_/_b_i_n, _/_u_s_r_/_o_b_j_/_l_i_b, _/_u_s_r_/_o_b_j_/_u_s_r_._b_i_n,
               and so forth.

               If a relative path is specified, it will be converted to an
               absolute path before being used.  bbuuiilldd..sshh imposes the
               restriction that the argument to the --OO option must not contain
               a ``$'' (dollar sign) character.  If the directory does not
               already exist, bbuuiilldd..sshh will create it.

               In normal use, exactly one of the --MM or --OO options should be
               specified.  If neither --MM nor --OO 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.

     --oo        Set the value of MMKKOOBBJJDDIIRRSS to ``no''.  Otherwise, it will be
               automatically set to ``yes''.  This default is opposite to the
               behaviour when not using bbuuiilldd..sshh.

     --RR _r_e_l    Set the value of RREELLEEAASSEEDDIIRR to _r_e_l.  If a relative path is
               specified, it will be converted to an absolute path before
               being used.

     --rr        Remove the contents of DDEESSTTDDIIRR and TTOOOOLLDDIIRR before building
               (provides a clean starting point).  This will skip deleting
               DDEESSTTDDIIRR if building on a native system to the root directory.

     --SS _s_e_e_d   Change the value of BBUUIILLDDSSEEEEDD to _s_e_e_d.  This should rarely be
               necessary.

     --TT _t_o_o_l_s  Set the value of TTOOOOLLDDIIRR to _t_o_o_l_s.  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.

     --UU        Set MMKKUUNNPPRRIIVVEEDD==yyeess.

     --uu        Set MMKKUUPPDDAATTEE==yyeess.

     --VV _v_a_r=[_v_a_l_u_e]
               Set the environment variable _v_a_r to an optional _v_a_l_u_e.  This is
               propagated to the nnbbmmaakkee wrapper.

     --ww _w_r_a_p_p_e_r
               Create the nnbbmmaakkee wrapper script (see below) in a custom
               location, specified by _w_r_a_p_p_e_r.  This allows, for instance, to
               place the wrapper in PPAATTHH automatically.  Note that _w_r_a_p_p_e_r 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.

     --XX _x_1_1_s_r_c
               Set the value of XX1111SSRRCCDDIIRR to _x_1_1_s_r_c.  If a relative path is
               specified, it will be converted to an absolute path before
               being used.

     --xx        Set MMKKXX1111==yyeess.

     --ZZ _v_a_r    Unset ("zap") the environment variable _v_a_r.  This is propagated
               to the nnbbmmaakkee wrapper.

   TThhee ""nnbbmmaakkee--MMAACCHHIINNEE"" wwrraappppeerr ssccrriipptt
     If using the bbuuiilldd..sshh script to build NetBSD, a nnbbmmaakkee--MMAACCHHIINNEE script
     will be created in TTOOOOLLDDIIRR//bbiinn upon the first build to assist in building
     subtrees on a cross-compile host.

     nnbbmmaakkee--MMAACCHHIINNEE can be invoked in lieu of make(1), and will instead call
     the up-to-date version of ``nbmake'' installed into TTOOOOLLDDIIRR//bbiinn with
     several key variables pre-set, including MMAACCHHIINNEE, MMAACCHHIINNEE__AARRCCHH, and
     TTOOOOLLDDIIRR.  nnbbmmaakkee--MMAACCHHIINNEE will also set variables specified with --VV, and
     unset variables specified with --ZZ.

     This script can be symlinked into a directory listed in PPAATTHH, or called
     with an absolute path.

EEXXAAMMPPLLEESS
     1.   % ./build.sh [options] tools kernel=GENERIC

          Build a new toolchain, and use the new toolchain to configure and
          build a new GENERIC kernel.

     2.   % ./build.sh [options] -U distribution

          Using unprivileged mode, build a complete distribution to a DDEESSTTDDIIRR
          directory that bbuuiilldd..sshh selects (and will display).

     3.   # ./build.sh [options] -U install=/

          As root, install to _/ the distribution that was built by example 2.
          Even though this is run as root, --UU is required so that the
          permissions stored in DDEESSTTDDIIRR_/_M_E_T_A_L_O_G are correctly applied to the
          files as they're copied to _/.

     4.   % ./build.sh [options] -U -u release

          Using unprivileged mode, build a complete release to DDEESSTTDDIIRR and
          RREELLEEAASSEEDDIIRR directories that bbuuiilldd..sshh selects (and will display).
          MMKKUUPPDDAATTEE==yyeess (--uu) 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.

OOBBSSOOLLEETTEE VVAARRIIAABBLLEESS
     NNBBUUIILLDDJJOOBBSS  Use the make(1) option --jj instead.

     UUSSEE__NNEEWW__TTOOOOLLCCHHAAIINN
                 The new toolchain is now the default.  To disable, use
                 TTOOOOLLCCHHAAIINN__MMIISSSSIINNGG==yyeess.

SSEEEE AALLSSOO
     make(1), hier(7), release(7), etcupdate(8), postinstall(8), sysinst(8),
     _p_k_g_s_r_c_/_s_y_s_u_t_i_l_s_/_c_d_r_t_o_o_l_s

HHIISSTTOORRYY
     The bbuuiilldd..sshh based build scheme was introduced for NetBSD 1.6 as
     UUSSEE__NNEEWW__TTOOOOLLCCHHAAIINN, and re-worked to TTOOOOLLCCHHAAIINN__MMIISSSSIINNGG after that.

NetBSD                           May 25, 2012                           NetBSD