BUILDING revision 1.55
1BUILDING(8) NetBSD System Manager's Manual BUILDING(8) 2 3NAME 4 BUILDING -- Procedure for building NetBSD from source code. 5 6STATUS 7 This document is a work-in-progress. As such, the information described 8 here may not match the reality of the build system as of this writing. 9 Once this document is completely in sync with reality, this paragraph 10 will be removed. 11 12 Discrepancies between this documentation and the current reality of 13 implementation are noted specially, as with the note below: 14 15 Note: This document applies only to platforms which use the new toolchain 16 as indicated by the default setting of TOOLCHAIN_MISSING in <bsd.own.mk>. 17 Platforms which have not yet been switched to the new toolchain should 18 continue building traditionally, using the notes specified in the file 19 UPDATING. 20 21REQUIREMENTS 22 NetBSD is designed to be buildable on most POSIX-compliant host systems. 23 The basic build procedure is the same whether compiling natively (on the 24 same NetBSD architecture) or cross compiling (on another architecture or 25 OS). 26 27 This source tree contains a special subtree, ``tools'', which uses the 28 host system to create a build toolchain for the target architecture. The 29 host system must have at least C and C++ compilers in order to create the 30 toolchain (make is not required); all other tools are created as part of 31 the NetBSD build process. (See the environment variables section below 32 if you need to override or manually select your compilers.) 33 34FILES 35 Source tree layout 36 doc/BUILDING.mdoc 37 This document (in -mdoc troff format; the original copy). 38 39 BUILDING This document (in plaintext). 40 41 tools/compat/README 42 Special notes for cross-hosting a NetBSD build on non- 43 NetBSD platforms. 44 45 Makefile The main Makefile for NetBSD; should only be run for 46 native builds with an appropriately up-to-date version of 47 NetBSD make(1). (For building from out-of-date systems or 48 on a non-native host, see the build.sh shell script.) 49 50 UPDATING Special notes for updating from an earlier revision of 51 NetBSD. It is important to read this file before every 52 build of an updated source tree. 53 54 build.sh Bourne-compatible shell script used for building the host 55 build tools and the NetBSD system from scratch. Can be 56 used for both native and cross builds, and should be used 57 instead of make(1) for any source tree that is updated and 58 recompiled regularly. 59 60 crypto/dist/, dist/, gnu/dist/ 61 Sources imported verbatim from third parties, without man- 62 gling the existing build structure. Other source trees in 63 bin through usr.sbin use the NetBSD make(1) ``reachover'' 64 Makefile semantics when building these programs for a 65 native host. 66 67 distrib/, etc/ 68 Sources for items used when making a full release snap- 69 shot, such as files installed in DESTDIR/etc on the desti- 70 nation system, boot media, and release notes. 71 72 regress/ Regression test harness. Can be cross-compiled, but only 73 run natively. 74 75 sys/ NetBSD kernel sources. 76 77 tools/ ``Reachover'' build structure for the host build tools. 78 This has a special method of determining out-of-date sta- 79 tus. 80 81 bin/ ... usr.sbin/ 82 Sources to the NetBSD userland (non-kernel) programs. If 83 any of these directories are missing, they will be skipped 84 during the build. 85 86 x11/ ``Reachover'' build structure for X11R6; the source is in 87 X11SRCDIR. 88 89 Build tree layout 90 The NetBSD build tree is described in hier(7), and the release layout is 91 described in release(7). 92 93CONFIGURATION 94 Environment variables 95 Several environment variables control the behaviour of NetBSD builds. 96 97 HOST_CC Path name to C compiler used to create the toolchain. 98 99 HOST_CXX Path name to C++ compiler used to create the toolchain. 100 101 MACHINE Machine type. 102 103 MACHINE_ARCH Machine architecture. 104 105 MAKE Path name to invoke make(1) as. 106 107 MAKEFLAGS Flags to invoke make(1) with. 108 109 MAKEOBJDIR Directory to use as the .OBJDIR for the current direc- 110 tory. Used only if MAKEOBJDIRPREFIX is not defined. 111 MAKEOBJDIR can only be provided in the environment or 112 via the -O flag of build.sh. 113 114 MAKEOBJDIRPREFIX Top level directory of the object directory tree. If 115 this is defined, ${MAKEOBJDIRPREFIX}/${.CURDIR} is used 116 as the .OBJDIR for the current directory. The current 117 directory may be read only. MAKEOBJDIRPREFIX can only 118 be provided in the environment or via the -M flag of 119 build.sh. 120 121 "make" variables 122 Several variables control the behavior of NetBSD builds. Unless other- 123 wise specified, these variables may be set in either the process environ- 124 ment or the make(1) configuration file specified by MAKECONF. 125 126 BUILDID Identifier for the build. The identifier will be appended to 127 object directory names, and can be consulted in the make(1) 128 configuration file in order to set additional build parame- 129 ters, such as compiler flags. 130 131 DESTDIR Directory to contain the built NetBSD system. If set, spe- 132 cial options are passed to the compilation tools to prevent 133 their default use of the host system's /usr/include, 134 /usr/lib, and so forth. This pathname should not end with a 135 slash (/) character (for installation into the system's root 136 directory, set DESTDIR to an empty string). The directory 137 must reside on a file system which supports long file names 138 and hard links. 139 140 Default: Empty string if USETOOLS is ``yes''; unset other- 141 wise. 142 143 Note: build.sh will provide a default of destdir.MACHINE (in 144 the top-level .OBJDIR) unless run in `expert' mode 145 146 MAKECONF The name of the make(1) configuration file. Only settable in 147 the process environment. 148 149 Default: ``/etc/mk.conf'' 150 151 MAKEVERBOSE 152 Level of verbosity of status messages. Supported values: 153 154 0 No descriptive messages are shown. 155 156 1 Descriptive messages are shown. 157 158 2 Descriptive messages (prefixed with a `#') and command 159 output is not suppressed. 160 161 Default: 2 162 163 MKCATPAGES Can be set to ``yes'' or ``no''. Indicates whether prefor- 164 matted plaintext manual pages will be created during a build. 165 166 Default: ``yes'' 167 168 MKCRYPTO Can be set to ``yes'' or ``no''. Indicates whether crypto- 169 graphic code will be included in a build; provided for the 170 benefit of countries that do not allow strong cryptography. 171 Will not affect use of the standard low-security password 172 encryption system, crypt(3). 173 174 Default: ``yes'' 175 176 MKDOC Can be set to ``yes'' or ``no''. Indicates whether system 177 documentation destined for DESTDIR/usr/share/doc will be 178 installed during a build. 179 180 Default: ``yes'' 181 182 MKHOSTOBJ Can be set to ``yes'' or ``no''. If set to ``yes'', then for 183 programs intended to be run on the compile host, the name, 184 release, and architecture of the host operating system will 185 be suffixed to the name of the object directory created by 186 ``make obj''. (This allows multiple host systems to compile 187 NetBSD for a single target.) If set to ``no'', then programs 188 built to be run on the compile host will use the same object 189 directory names as programs built to be run on the target. 190 191 Default: ``no'' 192 193 MKINFO Can be set to ``yes'' or ``no''. Indicates whether GNU Info 194 files, used for the documentation for most of the compilation 195 tools, will be created and installed during a build. 196 197 Default: ``yes'' 198 199 MKLINT Can be set to ``yes'' or ``no''. Indicates whether lint(1) 200 will be run against portions of the NetBSD source code during 201 the build, and whether lint libraries will be installed into 202 DESTDIR/usr/libdata/lint. 203 204 Default: ``yes'' 205 206 MKMAN Can be set to ``yes'' or ``no''. Indicates whether manual 207 pages will be installed during a build. 208 209 Default: ``yes'' 210 211 MKNLS Can be set to ``yes'' or ``no''. Indicates whether Native 212 Language System locale zone files will be compiled and 213 installed during a build. 214 215 Default: ``yes'' 216 217 MKOBJ Can be set to ``yes'' or ``no''. Indicates whether object 218 directories will be created when running ``make obj''. If 219 set to ``no'', then all built files will be located inside 220 the regular source tree. 221 222 Default: ``yes'' 223 224 MKPIC Can be set to ``yes'' or ``no''. Indicates whether shared 225 objects and libraries will be created and installed during a 226 build. If set to ``no'', the entire built system will be 227 statically linked. 228 229 Default: Platform dependent. As of this writing, all plat- 230 forms except sh3 default to ``yes''. 231 232 MKPICINSTALL 233 Can be set to ``yes'' or ``no''. Indicates whether the ar(1) 234 format libraries (lib*_pic.a), used to generate shared 235 libraries, are installed during a build. 236 237 Default: ``yes'' 238 239 MKPROFILE Can be set to ``yes'' or ``no''. Indicates whether profiled 240 libraries (lib*_p.a) will be built and installed during a 241 build. 242 243 Default: ``yes''; however, some platforms turn off MKPROFILE 244 by default at times due to toolchain problems with profiled 245 code. 246 247 MKSHARE Can be set to ``yes'' or ``no''. Indicates whether files 248 destined to reside in DESTDIR/usr/share will be built and 249 installed during a build. If set to ``no'', then all of 250 MKCATPAGES, MKDOC, MKINFO, MKMAN, and MKNLS will be set to 251 ``no'' unconditionally. 252 253 Default: ``yes'' 254 255 MKTTINTERP Can be set to ``yes'' or ``no''. For X builds, decides if 256 the TrueType bytecode interpreter is turned on. See 257 http://www.freetype.org/patents.html for details. 258 259 Default: ``no'' 260 261 MKUNPRIVED Can be set to ``yes'' or ``no''. Indicates whether an 262 unprivileged install will occur. The user, group, permis- 263 sions, and file flags, will not be set on the installed 264 items; instead the information will be appended to a file 265 called METALOG in DESTDIR. The contents of METALOG are used 266 during the generation of the distribution tar files to ensure 267 that the appropriate file ownership is stored. 268 269 Default: ``no'' 270 271 MKUPDATE Can be set to ``yes'' or ``no''. Indicates whether all 272 install operations intended to write to DESTDIR will compare 273 file timestamps before installing, and skip the install phase 274 if the destination files are up-to-date. This also has 275 implications on full builds (see next subsection). 276 277 Default: ``no'' 278 279 MKX11 Can be set to ``yes'' or ``no''. Indicates whether X11R6 is 280 built from X11SRCDIR. 281 282 Default: ``no'' 283 284 TOOLDIR Directory to hold the host tools, once built. This directory 285 should be unique to a given host system and NetBSD source 286 tree. (However, multiple targets may share the same TOOLDIR; 287 the target-dependent files have unique names.) If unset, a 288 default based on the uname(1) information of the host plat- 289 form will be created in the .OBJDIR of src. 290 291 Default: Unset. 292 293 USETOOLS Indicates whether the tools specified by TOOLDIR should be 294 used as part of a build in progress. Must be set to ``yes'' 295 if cross-compiling. 296 297 yes Use the tools from TOOLDIR. 298 299 no Do not use the tools from TOOLDIR, but refuse to build 300 native compilation tool components that are version- 301 specific for that tool. 302 303 never Do not use the tools from TOOLDIR, even when building 304 native tool components. This is similar to the tradi- 305 tional NetBSD build method, but does not verify that 306 the compilation tools in use are up-to-date enough in 307 order to build the tree successfully. This may cause 308 build or runtime problems when building the whole 309 NetBSD source tree. 310 311 Default: ``yes'' if building all or part of a whole NetBSD 312 source tree (detected automatically); ``no'' otherwise (to 313 preserve traditional semantics of the <bsd.*.mk> make(1) 314 include files). 315 316 X11SRCDIR Directory containing the X11R6 source. The main X11R6 source 317 is found in X11SRCDIR/xfree/xc. 318 319 Default: ``/usr/xsrc'' 320 321 "make" variables for full builds 322 These variables only affect the top level ``Makefile'' and do not affect 323 manually building subtrees of the NetBSD source code. 324 325 INSTALLWORLDDIR Location for the ``make installworld'' target to install 326 to. 327 328 Default: ``/'' 329 330 MKOBJDIRS Can be set to ``yes'' or ``no''. Indicates whether 331 object directories will be created automatically (via a 332 ``make obj'' pass) at the start of a build. 333 334 Default: ``no'' 335 336 MKUPDATE Can be set to ``yes'' or ``no''. If set, then in addi- 337 tion to the effects described for MKUPDATE=yes above, 338 this implies the effects of NOCLEANDIR (i.e., ``make 339 cleandir'' is avoided). 340 341 Default: ``no'' 342 343 NBUILDJOBS Now obsolete. Use the make(1) option -j, instead (see 344 below) 345 346 Default: Unset. 347 348 NOCLEANDIR If set, avoids the ``make cleandir'' phase of a full 349 build. This has the effect of allowing only changed 350 files in a source tree to be recompiled. This can speed 351 up builds when updating only a few files in the tree. 352 353 Default: Unset. 354 355 NODISTRIBDIRS If set, avoids the ``make distrib-dirs'' phase of a full 356 build. This skips running mtree(8) on DESTDIR, useful 357 on systems where building as an unprivileged user, or 358 where it is known that the system-wide mtree files have 359 not changed. 360 361 Default: Unset. 362 363 NOINCLUDES If set, avoids the ``make includes'' phase of a full 364 build. This has the effect of preventing make(1) from 365 thinking that some programs are out-of-date simply 366 because the system include files have changed. However, 367 this option should not be used when updating the entire 368 NetBSD source tree arbitrarily; it is suggested to use 369 MKUPDATE=yes in that case. 370 371 Default: Unset. 372 373 RELEASEDIR If set, specifies the directory to which a release(7) 374 layout will be written at the end of a ``make release''. 375 376 Default: Unset. 377 378 Note: build.sh will provide a default of releasedir (in 379 the top-level .OBJDIR) unless run in `expert' mode 380 381BUILDING 382 "make" command line options 383 This is not a summary of all the options available to make(1); only the 384 options used most frequently with NetBSD builds are listed here. 385 386 -j njob Run up to njob make(1) subjobs in parallel. Makefiles should 387 use .WAIT or have explicit dependencies as necessary to 388 enforce build ordering. If you see build failures with -j, 389 please save complete build logs so the failures can be ana- 390 lyzed. 391 392 -m dir Specify the default directory for searching for system Make- 393 file segments, mainly the <bsd.*.mk> files. When building any 394 full NetBSD source tree, this should be set to the 395 ``share/mk'' directory in the source tree. (This is set auto- 396 matically when building from the top level.) 397 398 -n Display the commands that would have been executed, but do not 399 actually execute them. This will still cause recursion to 400 take place. 401 402 -V var Print make(1)'s idea of the value of var. Does not build any 403 targets. 404 405 var=value Set the variable var to value, overriding any setting speci- 406 fied by the process environment, the MAKECONF configuration 407 file, or the system Makefile segments. 408 409 "make" targets 410 These default targets may be built by running make(1) in any subtree of 411 the NetBSD source code. It is recommended that none of these be used 412 from the top level Makefile; as a specific exception, ``make obj'' and 413 ``make cleandir'' are useful in that context. 414 415 all Build programs, libraries, and preformatted documentation. 416 417 clean Remove program and library object code files. 418 419 cleandir Same as clean, but also remove preformatted documentation, 420 dependency files generated by ``make depend'', and any other 421 files known to be created at build time. 422 423 depend Create dependency files (.depend) containing more detailed 424 information about the dependencies of source code on header 425 files. Allows programs to be recompiled automatically when a 426 dependency changes. 427 428 dependall Does a ``make depend'' immediately followed by a ``make all''. 429 This improves cache locality of the build since both passes 430 read the source files in their entirety. 431 432 distclean Synonym for cleandir. 433 434 includes Build and install system header files. Typically needed 435 before any system libraries or programs can be built. 436 437 install Install programs, libraries, and documentation into DESTDIR. 438 Few files will be installed to DESTDIR/dev, DESTDIR/etc, 439 DESTDIR/root or DESTDIR/var in order to prevent user supplied 440 configuration data from being overwritten. 441 442 lint Run lint(1) against the C source code, where appropriate, and 443 generate system-installed lint libraries. 444 445 obj Create object directories to be used for built files, instead 446 of building directly in the source tree. 447 448 tags Create ctags(1) searchable function lists usable by the ex(1) 449 and vi(1) text editors. 450 451 "make" targets for the top level 452 Additional make(1) targets are usable specifically from the top source 453 level to facilitate building the entire NetBSD source tree. 454 455 build Build the entire NetBSD system. This orders portions of 456 the source tree such that prerequisites will be built in 457 the proper order. 458 459 distribution Do a ``make build'', and then install a full distribution 460 into DESTDIR, including files in DESTDIR/dev, DESTDIR/etc, 461 DESTDIR/root and DESTDIR/var. 462 463 buildworld As per ``make distribution'', except that it ensures that 464 DESTDIR is not the root directory. 465 466 installworld Install the distribution from DESTDIR to INSTALLWORLDDIR 467 (which defaults to the root directory). Ensures that 468 INSTALLWORLDDIR is not the root directory if cross compil- 469 ing. 470 471 Note: It is highly recommended that you upgrade your kernel 472 and reboot before performing this operation. 473 474 sets Create distribution sets from DESTDIR into 475 RELEASEDIR/MACHINE/binary/sets. Should be run after ``make 476 distribution'' (as ``make build'' does not install all of 477 the required files). 478 479 sourcesets Create source sets of the source tree into 480 RELEASEDIR/source/sets. 481 482 syspkgs Create syspkgs from DESTDIR into 483 RELEASEDIR/MACHINE/binary/syspkgs. Should be run after 484 ``make distribution'' (as ``make build'' does not install 485 all of the required files). 486 487 release Do a ``make distribution'', build kernels, distribution 488 media, and install sets (this as per ``make sets''), and 489 then package the system into a standard release layout as 490 described by release(7). This requires that RELEASEDIR be 491 set (see above). 492 493 regression-tests 494 Can only be run after building the regression tests in the 495 directory ``regress''. Runs the compiled regression tests 496 on the local host. 497 498 The "build.sh" script 499 This script file is a Bourne shell script designed to build the entire 500 NetBSD system on any host with a Bourne shell in /bin/sh, including many 501 that are not POSIX compliant. Note that if a host system's /bin/sh is 502 unusually old and broken, the Korn Shell (/bin/ksh), if available, may be 503 a usable alternative. 504 505 All cross-compile builds, and most native builds, of the entire system 506 should make use of build.sh rather than just running ``make''. This way, 507 the make(1) program will be bootstrapped properly, in case the host sys- 508 tem has an older or incompatible ``make'' program. 509 510 When compiling the entire system via build.sh, many make(1) variables are 511 set for you in order to help encapsulate the build process. In the list 512 of options below, variables that are automatically set by build.sh are 513 noted where applicable. 514 515 The following operations are supported by build.sh: 516 517 build Build the system as per ``make build''. This option 518 implies the obj and tools operations. 519 520 distribution Build a full distribution as per ``make distribution''. 521 This option implies the build operation. 522 523 release Build a full release as per ``make release''. This option 524 implies the distribution operation. 525 526 makewrapper Create the nbmake-MACHINE wrapper. This operation is auto- 527 matically performed for any of the other operations. 528 529 obj Perform ``make obj''. 530 531 tools Build and install the host tools from src/tools. 532 533 install=idir Install the contents of DESTDIR to idir, using ``make 534 installworld''. 535 536 kernel=kconf Build a new kernel. The kconf argument is the name of a 537 configuration file suitable for use by config(1). If kconf 538 does not contain any `/' characters, the configuration file 539 is expected to be found in the KERNCONFDIR directory, which 540 is typically sys/arch/MACHINE/conf. The new kernel will be 541 built in a subdirectory of KERNOBJDIR, which is typically 542 sys/arch/MACHINE/compile or an associated object directory. 543 In order to ensure that the kernel is built using up-to- 544 date tools, it is strongly recommended that the tools be 545 rebuilt (using the tools operation). 546 547 releasekernel=kconf 548 Install a gzip(1)ed copy of the kernel built by 549 kernel=kconf into RELEASEDIR/MACHINE/binary/kernel, usually 550 as netbsd-kconf.gz, although the ``netbsd'' prefix is 551 determined from the ``config'' directives in kconf. 552 553 sets Perform ``make sets''. 554 555 sourcesets Perform ``make sourcesets''. 556 557 syspkgs Perform ``make syspkgs''. 558 559 The following command line options alter the behaviour of the build.sh 560 operations described above: 561 562 -a arch Set the value of MACHINE_ARCH to arch. 563 564 -B buildid 565 Set the value of BUILDID to buildid. This will also append the 566 build idenfitier to the name of the ``make'' wrapper script so 567 that the resulting name is of the form 568 ``nbmake-MACHINE-BUILDID''. 569 570 -D dest Set the value of DESTDIR to dest. 571 572 -E Set `expert' mode. This overrides various sanity checks, and 573 allows: DESTDIR does not have to be set to a non-root path for 574 builds, and MKUNPRIVED=yes does not have to be set when build- 575 ing as a non-root user. 576 577 Note: It is highly recommended that you know what you are doing 578 when you use this option. 579 580 -h Print a help message. 581 582 -j njob Passed through to make(1). Makefiles should use .WAIT or have 583 explicit dependancies as necessary to enforce build ordering. 584 If you see build failures with -j, please save complete build 585 logs so the failures can be analyzed. 586 587 -M obj Set MAKEOBJDIRPREFIX to obj. Unsets MAKEOBJDIR. 588 589 -m mach Set the value of MACHINE to mach. This will also override any 590 value of MACHINE_ARCH in the process environment with a value 591 deduced from mach, unless -a is specified, or mach is a special 592 case listed below. All cross builds require -m, but if unset 593 on a NetBSD host, the host's value of MACHINE will be detected 594 and used automatically. 595 596 Some machines support multiple values for MACHINE_ARCH. For a 597 given value of mach, the following MACHINE and MACHINE_ARCH 598 values will result: 599 600 mach MACHINE MACHINE_ARCH 601 evbmips evbmips (not set) 602 evbmips-eb evbmips mipseb 603 evbmips-el evbmips mipsel 604 evbsh3 evbsh3 (not set) 605 evbsh3-eb evbsh3 sh3eb 606 evbsh3-el evbsh3 sh3el 607 sbmips sbmips (not set) 608 sbmips-eb sbmips mipseb 609 sbmips-el sbmips mipsel 610 611 -N noiselevel 612 Set the ``noisyness'' level of the build, by setting 613 MAKEVERBOSE to noiselevel. 614 615 -n Show the commands that would be executed by build.sh, but do 616 not make any changes. This is similar in concept to ``make 617 -n''. 618 619 -O obj Create an appropriate transform macro for MAKEOBJDIR that will 620 place the built object files under obj. For instance, a set- 621 ting of /usr/obj will place build-time files under 622 /usr/obj/bin, /usr/obj/lib, /usr/obj/usr.bin, and so forth. 623 Unsets MAKEOBJDIRPREFIX. 624 625 -o Set the value of MKOBJDIRS to ``no''. Otherwise, it will be 626 automatically set to ``yes'' (which is opposite to the default 627 behaviour). 628 629 -R rel Set the value of RELEASEDIR to rel. 630 631 -r Remove the contents of DESTDIR and TOOLDIR before building 632 (provides a clean starting point). This will skip deleting 633 DESTDIR if building on a native system to the root directory. 634 635 -T tools Set the value of TOOLDIR to tools. If set, the bootstrap 636 ``make'' will only be rebuilt as needed (when the source files 637 for make(1) change). 638 639 -U Set MKUNPRIVED=yes. 640 641 -u Set MKUPDATE=yes. 642 643 -V var=[value] 644 Set the environment variable var to an optional value. This is 645 propagated to the nbmake wrapper. 646 647 -w wrapper 648 Create the nbmake wrapper script (see below) in a custom loca- 649 tion, specified by wrapper. This allows, for instance, to 650 place the wrapper in PATH automatically. Note that wrapper is 651 the full name of the file, not just a directory name. 652 653 -X x11src 654 Set the value of X11SRCDIR to x11src. 655 656 -x Set MKX11=yes. 657 658 -Z var Unset ("zap") the environment variable var. This is propagated 659 to the nbmake wrapper. 660 661 The "nbmake-MACHINE" wrapper script 662 If using the build.sh script to build NetBSD, a nbmake-MACHINE script 663 will be created in TOOLDIR/bin upon the first build to assist in building 664 subtrees on a cross-compile host. 665 666 nbmake-MACHINE can be invoked in lieu of make(1), and will instead call 667 the up-to-date version of ``nbmake'' installed into TOOLDIR/bin with sev- 668 eral key variables pre-set, including MACHINE, MACHINE_ARCH, and TOOLDIR. 669 build.sh will also set variables specified with -V, and unset variables 670 specified with -Z. 671 672 This script can be symlinked into a directory listed in PATH, or called 673 with an absolute path. 674 675EXAMPLES 676 1. % ./build.sh tools kernel=GENERIC 677 678 Build a new toolchain, and use the new toolchain to configure and 679 build a new GENERIC kernel. 680 681 2. % ./build.sh -U distribution 682 683 Using unprivileged mode, build a complete distribution to a DESTDIR 684 directory that build.sh selects (and will display). 685 686 3. # ./build.sh -U install=/ 687 688 As root, install to / the distribution that was built by example 2. 689 Even though this is run as root, -U is required so that the permis- 690 sions stored in DESTDIR/METALOG are correctly applied to the files 691 as they're copied to /. 692 693 4. % ./build.sh -U -u release 694 695 Using unprivileged mode, build a complete release to DESTDIR and 696 RELEASEDIR directories that build.sh selects (and will display). 697 MKUPDATE=yes (-u) is set to prevent the ``make cleandir'', so that 698 if this is run after example 2, it doesn't need to redo that portion 699 of the release build. 700 701OBSOLETE VARIABLES 702 NBUILDJOBS Use the make(1) option -j, instead. 703 704 USE_NEW_TOOLCHAIN 705 The new toolchain is now the default. To disable, use 706 TOOLCHAIN_MISSING=yes. 707 708SEE ALSO 709 make(1), hier(7), release(7) 710 711HISTORY 712 The build.sh based build scheme was introduced for NetBSD 1.6 as 713 USE_NEW_TOOLCHAIN, and re-worked to TOOLCHAIN_MISSING after that. 714 715BUGS 716 A few platforms are not yet using this build system. 717 718NetBSD January 4, 2006 NetBSD 719