1 BUILDING(8) System Manager's Manual BUILDING(8) 2 3 NAME 4 BUILDING - Procedure for building NetBSD from source code 5 6 REQUIREMENTS 7 NetBSD is designed to be buildable on most POSIX-compliant host systems. 8 The basic build procedure is the same whether compiling natively (on the 9 same NetBSD architecture) or cross compiling (on another architecture or 10 OS). 11 12 This source tree contains the build.sh shell script which supports both 13 native and cross builds of NetBSD. 14 15 This source tree contains a special subtree, "tools", which uses the host 16 system to create a build toolchain for the target architecture. The host 17 system must have at least C and C++ compilers in order to create the 18 toolchain (make(1) is not required); all other tools (including make(1) 19 as nbmake) are created as part of the NetBSD build process. (See the 20 Environment variables section below if you need to override or manually 21 select your compilers.) 22 23 Note: Within this document, cross-references to manual pages are to the 24 NetBSD manual pages, not the host system manual pages. The mdoc(7) 25 source to the NetBSD manual pages can be found within the source tree, 26 and these and can be formatted with mandoc(1) or nroff(1) if those are 27 available on the host system. The NetBSD manual pages are also available 28 at https://man.netbsd.org 29 30 FILES 31 Source tree layout 32 BUILDING This document (in plaintext). Generated from 33 doc/BUILDING.mdoc. 34 35 Makefile The main Makefile for NetBSD; should only be run for 36 native builds with an appropriately up-to-date version of 37 NetBSD make(1). Intended for expert use with knowledge of 38 its shortcomings, it has been superseded by the build.sh 39 shell script as the recommended means for building NetBSD. 40 41 UPDATING Special notes for updating from an earlier revision of 42 NetBSD. It is important to read this file before every 43 build of an updated source tree. 44 45 build.sh Bourne-compatible shell script used for building the host 46 build tools and the NetBSD system from scratch. Can be 47 used for both native and cross builds, and should be used 48 instead of make(1) as it performs additional checks to 49 prevent common issues going undetected, such as building 50 with an outdated version of make(1). 51 52 crypto/dist/, dist/, gnu/dist/ 53 Sources imported verbatim from third parties, without 54 mangling the existing build structure. Other source trees 55 in bin through usr.sbin use the NetBSD make(1) "reachover" 56 Makefile semantics when building these programs for a 57 native host. 58 59 distrib/, etc/ 60 Sources for items used when making a full release 61 snapshot, such as files installed in DESTDIR/etc on the 62 destination system, boot media, and release notes. 63 64 doc/BUILDING.mdoc 65 The source to this document, in mdoc(7) format. Used to 66 generate BUILDING. 67 68 external/, sys/external/ 69 Sources and build infrastructure for components imported 70 (mostly) unchanged from upstream maintainers, sorted by 71 applicable license. This is (slowly) replacing the 72 crypto/dist, dist, and gnu/dist directories. 73 74 external/mit/xorg/ 75 "Reachover" build structure for modular Xorg; the source 76 is in X11SRCDIR. 77 78 mk.conf Optional source tree specific mk.conf(5), used (if 79 present) instead of /etc/mk.conf unless MAKECONF is 80 defined. 81 82 Note: Not part of the NetBSD source repository. 83 84 regress/, tests/ 85 Regression test harness. Can be cross-compiled, but only 86 run natively. tests/ uses the atf(7) test framework; 87 regress/ contains older tests that have not yet been 88 migrated to atf(7). 89 90 sys/ NetBSD kernel sources. 91 92 tools/ "Reachover" build structure for the host build tools. 93 This has a special method of determining out-of-date 94 status. 95 96 tools/compat/README 97 Special notes for cross-hosting a NetBSD build on non- 98 NetBSD platforms. 99 100 Other directories including bin/ ... usr.sbin/ 101 Sources to the NetBSD userland (non-kernel) programs. If 102 any of these directories are missing, they will be skipped 103 during the build. 104 105 Build tree layout 106 The NetBSD build tree is described in hier(7) (whose mdoc(7) source is in 107 share/man/man7/hier.7), and the release layout is described in release(7) 108 (whose mdoc(7) source is in share/man/man7/release.7). 109 110 CONFIGURATION 111 Environment variables 112 Several environment variables control the behaviour of NetBSD builds. 113 114 HOST_CC Path name to C compiler used to create the toolchain. 115 116 Default: "cc". 117 118 HOST_CFLAGS Flags passed to the host C compiler. 119 120 Default: "-O". 121 122 HOST_CPPFLAGS Flags passed to the host C/C++ pre-processor. 123 124 Default: Unset. 125 126 HOST_CXX Path name to C++ compiler used to create the toolchain. 127 128 Default: Unset, but defaults to "c++" where required. 129 130 HOST_CXXFLAGS Flags passed to the host C++ compiler. 131 132 Default: Unset. 133 134 HOST_SH Path name to a shell available on the host system and 135 suitable for use during the build. The NetBSD build 136 system requires a modern Bourne-like shell with POSIX- 137 compliant features, and also requires support for the 138 "local" keyword to declare local variables in shell 139 functions (which is a widely-implemented but non- 140 standardised feature). 141 142 Depending on the host system, a suitable shell may be 143 /bin/sh, /usr/xpg4/bin/sh, /bin/ksh (provided it is a 144 variant of ksh that supports the "local" keyword, such as 145 ksh88, but not ksh93), or /usr/local/bin/bash. 146 147 Most parts of the build require HOST_SH to be an absolute 148 path; however, build.sh allows it to be a simple command 149 name, which will be converted to an absolute path by 150 searching the PATH. 151 152 Default: "sh". 153 154 INSTALLBOOT_UBOOT_PATHS 155 A colon-separated list of search paths used by 156 installboot(8) to find U-Boot packages. 157 158 Default: Unset. 159 160 MACHINE Machine type, e.g., "macppc". 161 162 Default: Unset. 163 164 MACHINE_ARCH Machine architecture, e.g., "powerpc". 165 166 Default: Unset. 167 168 MAKE Path name to invoke make(1) as. 169 170 Default: "make". 171 172 MAKECONF The name of the make(1) configuration file. See make 173 variables and mk.conf(5). 174 175 Note: Only settable in the process environment. 176 177 Default: "/etc/mk.conf", although build.sh will set the 178 default to the full path to mk.conf if the latter is 179 present in the same directory as build.sh. 180 181 MAKEFLAGS Flags to invoke make(1) with. 182 183 Note: build.sh ignores the value of MAKEFLAGS passed in 184 the environment, but allows MAKEFLAGS to be set via the 185 -V option. 186 187 Default: "-X" on systems with a small ARG_MAX (Cygwin, 188 Darwin, FreeBSD); otherwise unset. 189 190 MAKEOBJDIR Directory to use as the .OBJDIR for the current 191 directory. The value is subjected to variable expansion 192 by make(1). Typical usage is to set this variable to a 193 value involving the use of `${.CURDIR:S...}' or 194 `${.CURDIR:C...}', to derive the value of .OBJDIR from 195 the value of .CURDIR. Used only if MAKEOBJDIRPREFIX is 196 not defined. 197 198 Note: MAKEOBJDIR can be provided only in the environment 199 or via the -O flag of build.sh; it cannot usefully be set 200 inside a Makefile, including in mk.conf(5) or MAKECONF. 201 202 Default: Unset. 203 204 MAKEOBJDIRPREFIX 205 Top level directory of the object directory tree. The 206 value is subjected to variable expansion by make(1). 207 build.sh will create the ${MAKEOBJDIRPREFIX} directory if 208 necessary, but if make(1) is used without build.sh, then 209 rules in <bsd.obj.mk> will abort the build if the 210 ${MAKEOBJDIRPREFIX} directory does not exist. If the 211 value is defined and valid, then 212 ${MAKEOBJDIRPREFIX}/${.CURDIR} is used as the .OBJDIR for 213 the current directory. The current directory may be read 214 only. 215 216 Note: MAKEOBJDIRPREFIX can be provided only in the 217 environment or via the -M flag of build.sh; it cannot 218 usefully be set inside a Makefile, including in 219 mk.conf(5) or MAKECONF. 220 221 Default: Unset. 222 223 TMPDIR Top-level directory to store temporary directories used 224 by build.sh before paths to other directories such as 225 .OBJDIR can be determined. 226 227 Note: Must support execution of binaries. I.e., without 228 mount(8)'s -o noexec option. 229 230 Default: "/tmp". 231 232 make variables 233 Variables that control the behavior of NetBSD builds are documented in 234 mk.conf(5) (whose mdoc(7) source is in share/man/man5/mk.conf.5). 235 236 Unless otherwise specified, these variables may be set in either the 237 process environment or the make(1) configuration file mk.conf(5) 238 specified by MAKECONF. 239 240 Note: Variables set in the environment, either directly or via build.sh 241 options to set specific values in the nbmake-MACHINE wrapper script do 242 not override variables set in the mk.conf(5) file. To allow variables in 243 mk.conf(5) to be overridden by the environment or build.sh options, 244 define the variables using the "?=" make(1) variable assignment operator. 245 For example, 246 247 MAKEVERBOSE?=1 248 249 The supported mk.conf(5) make variables are: 250 251 BSDOBJDIR, BSDSRCDIR, BUILD, BUILDID, BUILDINFO, BUILDSEED, 252 CDEXTRA, CONFIGOPTS, COPTS, CPUFLAGS, DESTDIR, EXTERNAL_TOOLCHAIN, 253 INSTALLBOOT_BOARDS, INSTALLWORLDDIR, KERNARCHDIR, KERNCONFDIR, 254 KERNEL_DIR, KERNOBJDIR, KERNSRCDIR, LOCALTIME, MAKEVERBOSE, 255 MKAMDGPUFIRMWARE, MKARGON2, MKARZERO, MKATF, MKBINUTILS, MKBSDDIFF, 256 MKBSDGREP, MKBSDTAR, MKCATPAGES, MKCLEANSRC, MKCLEANVERIFY, 257 MKCOMPAT, MKCOMPATMODULES, MKCOMPATTESTS, MKCOMPATX11, MKCOMPLEX, 258 MKCROSSGDB, MKCTF, MKCVS, MKCXX, MKDEBUG, MKDEBUGKERNEL, 259 MKDEBUGLIB, MKDEBUGTOOLS, MKDEPINCLUDES, MKDOC, MKDTB, MKDTC, 260 MKDTRACE, MKDYNAMICROOT, MKFIRMWARE, MKGCC, MKGCCCMDS, MKGDB, 261 MKGROFF, MKGROFFHTMLDOC, MKHESIOD, MKHOSTOBJ, MKHTML, MKIEEEFP, 262 MKINET6, MKINFO, MKIPFILTER, MKISCSI, MKKERBEROS, MKKMOD, MKKYUA, 263 MKLDAP, MKLIBCSANITIZER, MKLIBCXX, MKLIBSTDCXX, MKLINKLIB, MKLINT, 264 MKLLVM, MKLLVMRT, MKLVM, MKMAKEMANDB, MKMAN, MKMANDOC, MKMANZ, 265 MKMDNS, MKNLS, MKNOUVEAUFIRMWARE, MKNPF, MKNSD, MKOBJ, MKOBJDIRS, 266 MKPAM, MKPCC, MKPF, MKPIC, MKPICINSTALL, MKPICLIB, MKPIE, 267 MKPIGZGZIP, MKPOSTFIX, MKPROFILE, MKRADEONFIRMWARE, MKRELRO, 268 MKREPRO, MKREPRO_TIMESTAMP, MKRUMP, MKSANITIZER, MKSHARE, MKSKEY, 269 MKSLJIT, MKSOFTFLOAT, MKSTATICLIB, MKSTATICPIE, MKSTRIPIDENT, 270 MKSTRIPSYM, MKTEGRAFIRMWARE, MKTPM, MKUNBOUND, MKUNPRIVED, 271 MKUPDATE, MKX11, MKX11FONTS, MKX11MOTIF, MKXORG_SERVER, MKYP, 272 MKZFS, NETBSDSRCDIR, NETBSD_OFFICIAL_RELEASE, NOCLEANDIR, 273 NODISTRIBDIRS, NOINCLUDES, OBJMACHINE, RELEASEDIR, 274 RUMPUSER_THREADS, RUMP_CURLWP, RUMP_DEBUG, RUMP_DIAGNOSTIC, 275 RUMP_KTRACE, RUMP_LOCKDEBUG, RUMP_LOCKS_UP, RUMP_NBCOMPAT, 276 RUMP_VIRTIF, RUMP_VNODE_LOCKDEBUG, TOOLCHAIN_MISSING, TOOLDIR, 277 USETOOLS, USE_FORT, USE_HESIOD, USE_INET6, USE_JEMALLOC, 278 USE_KERBEROS, USE_LDAP, USE_LIBCSANITIZER, USE_PAM, USE_PIGZGZIP, 279 USE_SANITIZER, USE_SKEY, USE_SSP, USE_XZ_SETS, USE_YP, 280 X11MOTIFPATH, X11SRCDIR. 281 282 The obsolete mk.conf(5) make variables are: 283 284 EXTSRCSRCDIR, MKBFD, MKCRYPTO, MKEXTSRC, MKKDEBUG, MKKERBEROS4, 285 MKLLD, MKLLDB, MKMCLINKER, MKPERFUSE, MKTOOLSDEBUG, NBUILDJOBS, 286 SHAREDSTRINGS, USE_COMBINE, USE_NEW_TOOLCHAIN. 287 288 BUILDING 289 make command line options 290 This is not a summary of all the options available to make(1); only the 291 options used most frequently with NetBSD builds are listed here. 292 293 -j njob Run up to njob make(1) subjobs in parallel. Makefiles should 294 use .WAIT or have explicit dependencies as necessary to 295 enforce build ordering. 296 297 -m dir Specify the default directory for searching for system 298 Makefile segments, mainly the <bsd.*.mk> files. When building 299 any full NetBSD source tree, this should be set to the 300 "share/mk" directory in the source tree. This is set 301 automatically when building from the top level, or when using 302 build.sh. 303 304 -n Show the commands that would have been executed, but do not 305 actually execute them. This will still cause recursion to 306 take place. 307 308 -V var Show make(1)'s idea of the value of var. Does not build any 309 targets. 310 311 var=value Set the variable var to value, overriding any setting 312 specified by the process environment, the MAKECONF 313 configuration file, or the system Makefile segments. 314 315 make targets 316 These default targets may be built by running make(1) in any subtree of 317 the NetBSD source code. It is recommended that none of these be used 318 from the top level Makefile; as a specific exception, "make obj" and 319 "make cleandir" are useful in that context. 320 321 all Build programs, libraries, and preformatted documentation. 322 323 clean Remove program and library object code files. 324 325 cleandir Same as clean, but also remove preformatted documentation, 326 dependency files generated by "make depend", and any other 327 files known to be created at build time. 328 329 depend Create dependency files (.depend) containing more detailed 330 information about the dependencies of source code on header 331 files. Allows programs to be recompiled automatically when a 332 dependency changes. 333 334 dependall Does a "make depend" immediately followed by a "make all". 335 This improves cache locality of the build since both passes 336 read the source files in their entirety. 337 338 distclean Synonym for cleandir. 339 340 includes Build and install system header files. Typically needed 341 before any system libraries or programs can be built. 342 343 install Install programs, libraries, and documentation into DESTDIR. 344 Few files will be installed to DESTDIR/dev, DESTDIR/etc, 345 DESTDIR/root or DESTDIR/var in order to prevent user supplied 346 configuration data from being overwritten. 347 348 lint Run lint(1) against the C source code, where appropriate, and 349 generate system-installed lint libraries. 350 351 obj Create object directories to be used for built files, instead 352 of building directly in the source tree. 353 354 tags Create ctags(1) searchable function lists usable by the ex(1) 355 and vi(1) text editors. 356 357 make targets for the top level 358 Additional make(1) targets are usable specifically from the top source 359 level to facilitate building the entire NetBSD source tree. 360 361 build Build the entire NetBSD system (except the kernel). This 362 orders portions of the source tree such that prerequisites 363 will be built in the proper order. 364 365 distribution Do a "make build", and then install a full distribution 366 (which does not include a kernel) into DESTDIR, including 367 files in DESTDIR/dev, DESTDIR/etc, DESTDIR/root and 368 DESTDIR/var. 369 370 buildworld As per "make distribution", except that it ensures that 371 DESTDIR is not the root directory. 372 373 installworld Install the distribution from DESTDIR to INSTALLWORLDDIR, 374 which defaults to the root directory. Ensures that 375 INSTALLWORLDDIR is not the root directory if cross 376 compiling. 377 378 The INSTALLSETS environment variable may be set to a space- 379 separated list of distribution sets to be installed. By 380 default, all sets except "etc" and "xetc" are installed, so 381 most files in INSTALLWORLDDIR/etc will not be installed or 382 modified. 383 384 Note: Before performing this operation with 385 INSTALLWORLDDIR=/, it is highly recommended that you 386 upgrade your kernel and reboot. After performing this 387 operation, it is recommended that you use etcupdate(8) to 388 update files in INSTALLWORLDDIR/etc, and postinstall(8) to 389 check for or fix inconsistencies. 390 391 sets Create distribution sets from DESTDIR into 392 RELEASEDIR/RELEASEMACHINEDIR/binary/sets. Should be run 393 after "make distribution", as "make build" alone does not 394 install all of the required files. 395 396 sourcesets Create source sets of the source tree into 397 RELEASEDIR/source/sets. 398 399 syspkgs Create syspkgs from DESTDIR into 400 RELEASEDIR/RELEASEMACHINEDIR/binary/syspkgs. Should be run 401 after "make distribution", as "make build" alone does not 402 install all of the required files. 403 404 release Do a "make distribution", build kernels, distribution 405 media, and install sets (this as per "make sets"), and then 406 package the system into a standard release layout as 407 described by release(7). This requires that RELEASEDIR be 408 set (see above). 409 410 iso-image Create a NetBSD installation CD-ROM image in the 411 RELEASEDIR/images directory. The CD-ROM file system will 412 have a layout as described in release(7). 413 414 For most machine types, the CD-ROM will be bootable, and 415 will automatically run the sysinst(8) menu-based 416 installation program, which can be used to install or 417 upgrade a NetBSD system. Bootable CD-ROMs also contain 418 tools that may be useful in repairing a damaged NetBSD 419 installation. 420 421 Before "make iso-image" is attempted, RELEASEDIR must be 422 populated by "make release" or equivalent. 423 424 Note: Other, smaller, CD-ROM images may be created in the 425 RELEASEDIR/RELEASEMACHINEDIR/installation/cdrom directory 426 by "make release". These smaller images usually contain 427 the same tools as the larger images in RELEASEDIR/images, 428 but do not contain additional content such as the 429 distribution sets. 430 431 Note: The mac68k port still uses an older method of 432 creating CD-ROM images. This requires the mkisofs(1) 433 utility, which is not part of NetBSD, but which can be 434 installed from pkgsrc/sysutils/cdrtools. 435 436 iso-image-source 437 Create a NetBSD installation CD-ROM image in the 438 RELEASEDIR/images directory. The CD-ROM file system will 439 have a layout as described in release(7). It will have top 440 level directories for the machine type and source. 441 442 For most machine types, the CD-ROM will be bootable, and 443 will automatically run the sysinst(8) menu-based 444 installation program, which can be used to install or 445 upgrade a NetBSD system. Bootable CD-ROMs also contain 446 tools that may be useful in repairing a damaged NetBSD 447 installation. 448 449 Before "make iso-image-source" is attempted, RELEASEDIR 450 must be populated by "make sourcesets release" or 451 equivalent. 452 453 Note: Other, smaller, CD-ROM images may be created in the 454 RELEASEDIR/RELEASEMACHINEDIR/installation/cdrom directory 455 by "make release". These smaller images usually contain 456 the same tools as the larger images in RELEASEDIR/images, 457 but do not contain additional content such as the 458 distribution sets. 459 460 Note: The mac68k port still uses an older method of 461 creating CD-ROM images. This requires the mkisofs(1) 462 utility, which is not part of NetBSD, but which can be 463 installed from pkgsrc/sysutils/cdrtools. 464 465 install-image 466 Create a bootable NetBSD installation disk image in the 467 RELEASEDIR/images directory. The installation disk image 468 is suitable for copying to bootable USB flash memory 469 sticks, etc., for machines which are able to boot from such 470 devices. The file system in the bootable disk image will 471 have a layout as described in release(7). 472 473 The installation image is bootable, and will automatically 474 run the sysinst(8) menu-based installation program, which 475 can be used to install or upgrade a NetBSD system. The 476 image also contains tools that may be useful in repairing a 477 damaged NetBSD installation. 478 479 Before "make install-image" is attempted, RELEASEDIR must 480 be populated by "make release" or equivalent. The build 481 must have been performed with MKUNPRIVED=yes because "make 482 install-image" relies on information in DESTDIR/METALOG. 483 484 live-image Create NetBSD live images in the RELEASEDIR/images 485 directory. The live image contains all necessary files to 486 boot NetBSD up to multi-user mode, including all files 487 which should be extracted during installation, NetBSD 488 disklabel, bootloaders, etc. 489 490 The live image is suitable for use as a disk image in 491 virtual machine environments such as QEMU, and also useful 492 to boot NetBSD from a USB flash memory stick on a real 493 machine, without the need for installation. 494 495 Before "make live-image" is attempted, RELEASEDIR must be 496 populated by "make release" or equivalent. The build must 497 have been performed with MKUNPRIVED=yes because "make 498 install-image" relies on information in DESTDIR/METALOG. 499 500 regression-tests 501 Can only be run after building the regression tests in the 502 directory "regress". Runs those compiled regression tests 503 on the local host. 504 505 Note: Most tests are now managed instead using atf(7); this 506 target should probably run those as well but currently does 507 not. 508 509 The build.sh script 510 This script file is a shell script designed to build the entire NetBSD 511 system on any host with a suitable modern shell and some common 512 utilities. The required shell features are described under the HOST_SH 513 variable. 514 515 If a host system's default shell does support the required features, then 516 we suggest that you explicitly specify a suitable shell using a command 517 like 518 519 /path/to/suitable/shell build.sh [options] 520 521 The above command will usually enable build.sh to automatically set 522 HOST_SH=/path/to/suitable/shell, but if that fails, then the following 523 set of commands may be used instead: 524 525 HOST_SH=/path/to/suitable/shell 526 export HOST_SH 527 ${HOST_SH} build.sh [options] 528 529 If build.sh detects that it is being executed under an unsuitable shell, 530 it attempts to exec a suitable shell instead, or shows an error message. 531 If HOST_SH is not set explicitly, then build.sh sets a default using 532 heuristics dependent on the host platform, or from the shell under which 533 build.sh is executed (if that can be determined), or using the first copy 534 of sh found in PATH. 535 536 All cross-compile builds, and most native builds, of the entire system 537 should make use of build.sh rather than just running "make". This way, 538 the make(1) program will be bootstrapped properly, in case the host 539 system has an older or incompatible "make" program. 540 541 When compiling the entire system via build.sh, many make(1) variables are 542 set for you in order to help encapsulate the build process. In the list 543 of options below, variables that are automatically set by build.sh are 544 noted where applicable. 545 546 The following operations are supported by build.sh: 547 548 build Build the system as per "make build". Before the main part 549 of the build commences, this command runs the obj operation 550 (unless the -o option is given), "make cleandir" (unless 551 the -u option is given), and the tools operation. 552 553 distribution Build a full distribution as per "make distribution". This 554 command first runs the build operation. 555 556 release Build a full release as per "make release". This command 557 first runs the distribution operation. 558 559 help Show a help message, and exit. 560 561 makewrapper Create the nbmake-MACHINE wrapper script. This operation 562 is automatically performed for any of the other operations. 563 564 cleandir Perform "make cleandir". 565 566 obj Perform "make obj". 567 568 tools Build and install the host tools from src/tools. This 569 command will first run "make obj" and "make cleandir" in 570 the tools subdirectory unless the -o or -u options 571 (respectively) are given. 572 573 install=idir Install the contents of DESTDIR to idir, using "make 574 installworld". 575 576 Note: Files that are part of the "etc" or "xetc" sets will 577 not be installed, unless overridden by the INSTALLSETS 578 environment variable. 579 580 kernel=kconf Build a new kernel. The kconf argument is the name of a 581 configuration file suitable for use by config(1). If kconf 582 does not contain any `/' characters, the configuration file 583 is expected to be found in the KERNCONFDIR directory, which 584 is typically sys/arch/MACHINE/conf. The new kernel will be 585 built in a subdirectory of KERNOBJDIR, which is typically 586 sys/arch/MACHINE/compile or an associated object directory. 587 588 This command does not imply the tools command; run the 589 tools command first unless it is certain that the tools 590 already exist and are up to date. 591 592 This command will run "make cleandir" on the kernel in 593 question first unless the -u option is given. 594 595 kernel.gdb=kconf 596 Build a new kernel with debug information. Similar to the 597 above kernel=kconf operation, but creates a netbsd.gdb file 598 alongside of the kernel netbsd, which contains a full 599 symbol table and can be used for debugging (for example 600 with a cross-gdb built by MKCROSSGDB). 601 602 kernels This command will build all kernels defined in port 603 specific release build procedure. 604 605 This command internally calls the kernel=kconf operation 606 for each found kernel configuration file. 607 608 modules This command will build kernel modules and install them 609 into DESTDIR. 610 611 releasekernel=kconf 612 Install a gzip(1)ed copy of the kernel previously built by 613 kernel=kconf into 614 RELEASEDIR/RELEASEMACHINEDIR/binary/kernel, usually as 615 netbsd-kconf.gz, although the "netbsd" prefix is determined 616 from the "config" directives in kconf. 617 618 sets Perform "make sets". 619 620 sourcesets Perform "make sourcesets". 621 622 syspkgs Perform "make syspkgs". 623 624 iso-image Perform "make iso-image". 625 626 iso-image-source 627 Perform "make iso-image-source". 628 629 install-image 630 Perform "make install-image". 631 632 live-image Perform "make live-image". 633 634 list-arch Show a list of valid MACHINE and MACHINE_ARCH settings, the 635 default MACHINE_ARCH for each MACHINE, and aliases for 636 MACHINE/MACHINE_ARCH pairs, and then exits. The -m or -a 637 options (or both) may be used to specify glob patterns that 638 will be used to narrow the list of results; for example, 639 "build.sh -m 'evb*' -a '*arm*' list-arch" will list all 640 known MACHINE/MACHINE_ARCH values in which either MACHINE 641 or ALIAS matches the pattern `evb*', and MACHINE_ARCH 642 matches the pattern `*arm*'. 643 644 The following command line options alter the behaviour of the build.sh 645 operations described above: 646 647 -a arch Set the value of MACHINE_ARCH to arch. See the -m option for 648 more information. 649 650 -B buildid 651 Set the value of BUILDID to buildid. This will also append the 652 build identifier to the name of the nbmake-MACHINE wrapper 653 script so that the resulting name is of the form 654 "nbmake-MACHINE-BUILDID". 655 656 -C cdextras 657 Append cdextras to the CDEXTRA variable, which is a space- 658 separated list of files or directories that will be added to 659 the CD-ROM image that may be create by the "iso-image" or 660 "iso-image-source" operations. Files will be added to the root 661 of the CD-ROM image, whereas directories will be copied 662 recursively. If relative paths are specified, they will be 663 converted to absolute paths before being used. Multiple paths 664 may be specified via multiple -C options, or via a single 665 option whose argument contains multiple space-separated paths. 666 667 -c compiler 668 Select the compiler for the toolchain to build NetBSD and for 669 inclusion in the NetBSD distribution. Supported choices: 670 671 clang 672 673 gcc [default] 674 675 The compiler used to build the toolchain can be different; see 676 HOST_CC and HOST_CXX. 677 678 -D dest Set the value of DESTDIR to dest. If a relative path is 679 specified, it will be converted to an absolute path before 680 being used. 681 682 -E Set `expert' mode. This overrides various sanity checks, and 683 allows: DESTDIR does not have to be set to a non-root path for 684 builds, and MKUNPRIVED=yes does not have to be set when 685 building as a non-root user. 686 687 Note: It is highly recommended that you know what you are doing 688 when you use this option. 689 690 -h Show a help message, and exit. 691 692 -j njob Run up to njob make(1) subjobs in parallel; passed through to 693 make(1). If you see failures for reasons other than running 694 out of memory while using build.sh with -j, please save 695 complete build logs so the failures can be analyzed. 696 697 To achieve the fastest builds, -j values between (1 + the 698 number of CPUs) and (2 * the number of CPUs) are recommended. 699 Use lower values on machines with limited memory or I/O 700 bandwidth. 701 702 -M obj Set MAKEOBJDIRPREFIX to obj. Unsets MAKEOBJDIR. See "-O obj" 703 for more information. 704 705 For instance, if the source directory is /usr/src, a setting of 706 "-M /usr/obj" will place build-time files under 707 /usr/obj/usr/src/bin, /usr/obj/usr/src/lib, 708 /usr/obj/usr/src/usr.bin, and so forth. 709 710 If a relative path is specified, it will be converted to an 711 absolute path before being used. build.sh imposes the 712 restriction that the argument to the -M option must not begin 713 with a "$" (dollar sign) character; otherwise it would be too 714 difficult to determine whether the value is an absolute or a 715 relative path. If the directory does not already exist, 716 build.sh will create it. 717 718 -m mach Set the value of MACHINE to mach, unless the mach argument is 719 an alias that refers to a MACHINE/MACHINE_ARCH pair, in which 720 case both MACHINE and MACHINE_ARCH are set from the alias. 721 Such aliases are interpreted entirely by build.sh; they are not 722 used by any other part of the build system. The MACHINE_ARCH 723 setting implied by mach will override any value of MACHINE_ARCH 724 in the process environment, but will not override a value set 725 by the -a option. All cross builds require -m, but if unset on 726 a NetBSD host, the host's value of MACHINE will be detected and 727 used automatically. 728 729 See the list-arch operation for a way to get a list of valid 730 MACHINE and MACHINE_ARCH settings. 731 732 -N noiselevel 733 Set the "noisiness" level of the build, by setting MAKEVERBOSE 734 to noiselevel. 735 736 -n Show the commands that would be executed by build.sh, but do 737 not make any changes. This is similar in concept to "make -n". 738 739 -O obj Create an appropriate transform macro for MAKEOBJDIR that will 740 place the built object files under obj. Unsets 741 MAKEOBJDIRPREFIX. 742 743 For instance, a setting of "-O /usr/obj" will place build-time 744 files under /usr/obj/bin, /usr/obj/lib, /usr/obj/usr.bin, and 745 so forth. 746 747 If a relative path is specified, it will be converted to an 748 absolute path before being used. build.sh imposes the 749 restriction that the argument to the -O option must not contain 750 a "$" (dollar sign) character. If the directory does not 751 already exist, build.sh will create it. 752 753 In normal use, exactly one of the -M or -O options should be 754 specified. If neither -M nor -O is specified, then a default 755 object directory will be chosen according to rules in 756 <bsd.obj.mk>. Relying on this default is not recommended 757 because it is determined by complex rules that are influenced 758 by the values of several variables and by the location of the 759 source directory. 760 761 Note: Placing the obj directory location outside of the default 762 source tree hierarchy makes it easier to manually clear out old 763 files in the event the "make cleandir" operation is unable to 764 do so. (See CAVEATS below.) 765 766 Note: The use of one of -M or -O is the only means of building 767 multiple machine architecture userlands from the same source 768 tree without cleaning between builds (in which case, one would 769 specify distinct obj locations for each). 770 771 -o Set the value of MKOBJDIRS to "no". Otherwise, it will be 772 automatically set to "yes". This default is opposite to the 773 behaviour when not using build.sh. 774 775 -P Set the value of MKREPRO and MKREPRO_TIMESTAMP to the latest 776 source CVS timestamp for reproducible builds. 777 778 -R rel Set the value of RELEASEDIR to rel. If a relative path is 779 specified, it will be converted to an absolute path before 780 being used. 781 782 -r Remove the contents of DESTDIR and TOOLDIR before building 783 (provides a clean starting point). This will skip deleting 784 DESTDIR if building on a native system to the root directory. 785 786 -S seed Change the value of BUILDSEED to seed. This should rarely be 787 necessary. 788 789 -T tools Set the value of TOOLDIR to tools. If a relative path is 790 specified, it will be converted to an absolute path before 791 being used. If set, the bootstrap "make" will only be rebuilt 792 if the source files for make(1) have changed. 793 794 -U Set MKUNPRIVED=yes. 795 796 -u Set MKUPDATE=yes. 797 798 -V var=[value] 799 Set the environment variable var to an optional value. This is 800 propagated to the nbmake-MACHINE wrapper script. 801 802 -w wrapper 803 Create the nbmake-MACHINE wrapper script (see below) in a 804 custom location, specified by wrapper. This allows, for 805 instance, to place the wrapper script in PATH automatically. 806 807 Note: wrapper is the full name of the file, not just a 808 directory name. If a relative path is specified, it will be 809 converted to an absolute path before being used. 810 811 -X x11src 812 Set the value of X11SRCDIR to x11src. If a relative path is 813 specified, it will be converted to an absolute path before 814 being used. 815 816 -x Set MKX11=yes. 817 818 -Z var Unset ("zap") the environment variable var. This is propagated 819 to the nbmake-MACHINE wrapper script. 820 821 -? Show a help message, and exit. 822 823 The nbmake-MACHINE wrapper script 824 If using the build.sh script to build NetBSD, a nbmake-MACHINE wrapper 825 script will be created in TOOLDIR/bin upon the first build to assist in 826 building subtrees on a cross-compile host. 827 828 The nbmake-MACHINE wrapper script can be invoked in lieu of make(1), and 829 will instead call the up-to-date version of "nbmake" installed into 830 TOOLDIR/bin with several key variables pre-set, including MACHINE, 831 MACHINE_ARCH, and TOOLDIR. nbmake-MACHINE will also set variables 832 specified with -V, and unset variables specified with -Z. Note that by 833 default these variables will not override mk.conf(5); see make variables 834 for more details. 835 836 This wrapper script can be symlinked into a directory listed in PATH, or 837 called with an absolute path. 838 839 EXAMPLES 840 1. % ./build.sh [OPTIONS] tools kernel=GENERIC 841 842 Build a new toolchain, and use the new toolchain to configure and 843 build a new GENERIC kernel. 844 845 2. % ./build.sh [OPTIONS] -U distribution 846 847 Using unprivileged mode, build a complete distribution to a DESTDIR 848 directory that build.sh selects (and will show). 849 850 3. # ./build.sh [OPTIONS] -U install=/ 851 852 As root, install to / the distribution that was built by example 2. 853 Even though this is run as root, -U is required so that the 854 permissions stored in DESTDIR/METALOG are correctly applied to the 855 files as they're copied to /. 856 857 4. % ./build.sh [OPTIONS] -U -u release 858 859 Using unprivileged mode, build a complete release to DESTDIR and 860 RELEASEDIR directories that build.sh selects (and will show). 861 MKUPDATE=yes (-u) is set to prevent the "make cleandir", so that if 862 this is run after example 2, it doesn't need to redo that portion of 863 the release build. 864 865 SEE ALSO 866 config(1), ctags(1), ex(1), gzip(1), lint(1), make(1), mandoc(1), 867 mkisofs(1), nroff(1), vi(1), mk.conf(5), atf(7), hier(7), mdoc(7), 868 release(7), etcupdate(8), installboot(8), mount(8), postinstall(8), 869 sysinst(8), pkgsrc/sysutils/cdrtools 870 871 Note: The NetBSD manual pages are also available at 872 https://man.netbsd.org 873 874 HISTORY 875 The build.sh based build scheme was introduced for NetBSD 1.6 as 876 USE_NEW_TOOLCHAIN, and re-worked to TOOLCHAIN_MISSING after that. 877 878 CAVEATS 879 After significant updates to third-party components in the source tree, 880 the "make cleandir" operation may be insufficient to clean out old files 881 in object directories. Instead, one may have to manually remove the 882 files. Consult the UPDATING file for notices concerning this. 883 884 NetBSD November 28, 2025 NetBSD 885
Indexes created Fri Feb 27 05:31:41 UTC 2026