BUILDING revision 1.122.4.1
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 a special subtree, "tools", which uses the host 13 system to create a build toolchain for the target architecture. The host 14 system must have at least C and C++ compilers in order to create the 15 toolchain (make is not required); all other tools are created as part of 16 the NetBSD build process. (See the environment variables section below 17 if you need to override or manually select your compilers.) 18 19 FILES 20 Source tree layout 21 doc/BUILDING.mdoc 22 This document (in -mdoc troff format; the original copy). 23 24 BUILDING This document (in plaintext). 25 26 tools/compat/README 27 Special notes for cross-hosting a NetBSD build on non- 28 NetBSD platforms. 29 30 Makefile The main Makefile for NetBSD; should only be run for 31 native builds with an appropriately up-to-date version of 32 NetBSD make(1). (For building from out-of-date systems or 33 on a non-native host, see the build.sh shell script.) 34 35 UPDATING Special notes for updating from an earlier revision of 36 NetBSD. It is important to read this file before every 37 build of an updated source tree. 38 39 build.sh Bourne-compatible shell script used for building the host 40 build tools and the NetBSD system from scratch. Can be 41 used for both native and cross builds, and should be used 42 instead of make(1) for any source tree that is updated and 43 recompiled regularly. 44 45 crypto/dist/, dist/, gnu/dist/ 46 Sources imported verbatim from third parties, without 47 mangling the existing build structure. Other source trees 48 in bin through usr.sbin use the NetBSD make(1) "reachover" 49 Makefile semantics when building these programs for a 50 native host. 51 52 external, sys/external 53 Sources and build infrastructure for components imported 54 (mostly) unchanged from upstream maintainers, sorted by 55 applicable license. This is (slowly) replacing the 56 crypto/dist, dist, and gnu/dist directories. 57 58 distrib/, etc/ 59 Sources for items used when making a full release 60 snapshot, such as files installed in DESTDIR/etc on the 61 destination system, boot media, and release notes. 62 63 tests/, regress/ 64 Regression test harness. Can be cross-compiled, but only 65 run natively. tests/ uses the atf(7) test framework; 66 regress/ contains older tests that have not yet been 67 migrated to atf(7). 68 69 sys/ NetBSD kernel sources. 70 71 tools/ "Reachover" build structure for the host build tools. 72 This has a special method of determining out-of-date 73 status. 74 75 bin/ ... usr.sbin/ 76 Sources to the NetBSD userland (non-kernel) programs. If 77 any of these directories are missing, they will be skipped 78 during the build. 79 80 external/mit/xorg/ 81 "Reachover" build structure for modular Xorg; the source 82 is in X11SRCDIR. 83 84 extsrc/ "Reachover" build structure for externally added programs 85 and libraries; the source is in EXTSRCSRCDIR. 86 87 Build tree layout 88 The NetBSD build tree is described in hier(7), and the release layout is 89 described in release(7). 90 91 CONFIGURATION 92 Environment variables 93 Several environment variables control the behaviour of NetBSD builds. 94 95 HOST_SH Path name to a shell available on the host system and 96 suitable for use during the build. The NetBSD build 97 system requires a modern Bourne-like shell with POSIX- 98 compliant features, and also requires support for the 99 "local" keyword to declare local variables in shell 100 functions (which is a widely-implemented but non- 101 standardised feature). 102 103 Depending on the host system, a suitable shell may be 104 /bin/sh, /usr/xpg4/bin/sh, /bin/ksh (provided it is a 105 variant of ksh that supports the "local" keyword, such 106 as ksh88, but not ksh93), or /usr/local/bin/bash. 107 108 Most parts of the build require HOST_SH to be an 109 absolute path; however, build.sh allows it to be a 110 simple command name, which will be converted to an 111 absolute path by searching the PATH. 112 113 HOST_CC Path name to C compiler used to create the toolchain. 114 115 HOST_CXX Path name to C++ compiler used to create the toolchain. 116 117 MACHINE Machine type, e.g., "macppc". 118 119 MACHINE_ARCH Machine architecture, e.g., "powerpc". 120 121 MAKE Path name to invoke make(1) as. 122 123 MAKEFLAGS Flags to invoke make(1) with. Note that build.sh 124 ignores the value of MAKEFLAGS passed in the 125 environment, but allows MAKEFLAGS to be set via the -V 126 option. 127 128 MAKEOBJDIR Directory to use as the .OBJDIR for the current 129 directory. The value is subjected to variable 130 expansion by make(1). Typical usage is to set this 131 variable to a value involving the use of 132 `${.CURDIR:S...}' or `${.CURDIR:C...}', to derive the 133 value of .OBJDIR from the value of .CURDIR. Used only 134 if MAKEOBJDIRPREFIX is not defined. MAKEOBJDIR can be 135 provided only in the environment or via the -O flag of 136 build.sh; it cannot usefully be set inside a Makefile, 137 including mk.conf or ${MAKECONF}. 138 139 MAKEOBJDIRPREFIX Top level directory of the object directory tree. The 140 value is subjected to variable expansion by make(1). 141 build.sh will create the ${MAKEOBJDIRPREFIX} directory 142 if necessary, but if make(1) is used without build.sh, 143 then rules in <bsd.obj.mk> will abort the build if the 144 ${MAKEOBJDIRPREFIX} directory does not exist. If the 145 value is defined and valid, then 146 ${MAKEOBJDIRPREFIX}/${.CURDIR} is used as the .OBJDIR 147 for the current directory. The current directory may 148 be read only. MAKEOBJDIRPREFIX can be provided only in 149 the environment or via the -M flag of build.sh; it 150 cannot usefully be set inside a Makefile, including 151 mk.conf or ${MAKECONF}. 152 153 "make" variables 154 Several variables control the behavior of NetBSD builds. Unless 155 otherwise specified, these variables may be set in either the process 156 environment or the make(1) configuration file specified by MAKECONF. 157 158 BUILDID Identifier for the build. If set, this should be a short 159 string that is suitable for use as part of a file or 160 directory name. The identifier will be appended to object 161 directory names, and can be consulted in the make(1) 162 configuration file in order to set additional build 163 parameters, such as compiler flags. It will also be used as 164 part of the kernel version string, which can be printed by 165 "uname -v". 166 167 Default: Unset. 168 169 BUILDINFO This may be a multi-line string containing information about 170 the build. This will appear in DESTDIR/etc/release, and it 171 will be stored in the buildinfo variable in any kernels that 172 are built. When such kernels are booted, the sysctl(7) 173 kern.buildinfo variable will report this value. The string 174 may contain backslash escape sequences, such as "\\" 175 (representing a backslash character) and "\n" (representing a 176 newline). 177 178 Default: Unset. 179 180 BUILDSEED GCC uses random numbers when compiling C++ code. This 181 variable seeds the gcc random number generator using the 182 -frandom-seed flag with this value. By default, it is set to 183 NetBSD-(majorversion). Using a fixed value causes C++ 184 binaries to be the same when built from the same sources, 185 resulting in identical (reproducible) builds. Additional 186 information is available in the GCC documentation of 187 -frandom-seed. 188 189 DESTDIR Directory to contain the built NetBSD system. If set, 190 special options are passed to the compilation tools to 191 prevent their default use of the host system's /usr/include, 192 /usr/lib, and so forth. This pathname must be an absolute 193 path, and should not end with a slash (/) character. (For 194 installation into the system's root directory, set DESTDIR to 195 an empty string, not to "/"). The directory must reside on a 196 file system which supports long file names and hard links. 197 198 Default: Empty string if USETOOLS is "yes"; unset otherwise. 199 200 Note: build.sh will provide a default of destdir.MACHINE (in 201 the top-level .OBJDIR) unless run in `expert' mode. 202 203 EXTSRCSRCDIR 204 Directory containing sources of externally added programs and 205 libraries. If specified, must be an absolute path. 206 207 Default: NETBSDRCDIR/../extsrc, if that exists; otherwise 208 /usr/extsrc. 209 210 MAKECONF The name of the make(1) configuration file. Only settable in 211 the process environment. 212 213 Default: "/etc/mk.conf" 214 215 MAKEVERBOSE 216 Level of verbosity of status messages. Supported values: 217 218 0 No descriptive messages or commands executed by make(1) 219 are shown. 220 221 1 Brief messages are shown describing what is being done, 222 but the actual commands executed by make(1) are not 223 displayed. 224 225 2 Descriptive messages are shown as above (prefixed with a 226 `#'), and ordinary commands performed by make(1) are 227 displayed. 228 229 3 In addition to the above, all commands performed by 230 make(1) are displayed, even if they would ordinarily 231 have been hidden through use of the "@" prefix in the 232 relevant makefile. 233 234 4 In addition to the above, commands executed by make(1) 235 are traced through use of the sh(1) "-x" flag. 236 237 Default: 2 238 239 MKCATPAGES Can be set to "yes" or "no". Indicates whether preformatted 240 plaintext manual pages will be created during a build. 241 242 Default: "no" 243 244 MKCROSSGDB Can be set to "yes" or "no". Create a cross-gdb as a host 245 tool. 246 247 Default: "no" 248 249 MKCRYPTO Can be set to "yes" or "no". Indicates whether cryptographic 250 code will be included in a build; provided for the benefit of 251 countries that do not allow strong cryptography. Will not 252 affect use of the standard low-security password encryption 253 system, crypt(3). 254 255 Default: "yes" 256 257 MKDEBUG Can be set to "yes" or "no". Indicates whether debug 258 information should be generated for all userland binaries 259 compiled. The result is collected as an additional debug.tgz 260 and xdebug.tgz set and installed in /usr/libdata/debug. 261 262 Default: "no" 263 264 MKDEBUGLIB Can be set to "yes" or "no". Indicates whether debug 265 information (see MKDEBUG) should also be generated for all 266 libraries build. 267 268 Default: "no" 269 270 MKDOC Can be set to "yes" or "no". Indicates whether system 271 documentation destined for DESTDIR/usr/share/doc will be 272 installed during a build. 273 274 Default: "yes" 275 276 MKEXTSRC Can be set to "yes" or "no". Indicates whether extsrc is 277 built from EXTSRCSRCDIR. 278 279 Default: "no" 280 281 MKHTML Can be set to "yes" or "no". Indicates whether preformatted 282 HTML manual pages will be built and installed 283 284 Default: "yes" 285 286 MKHOSTOBJ Can be set to "yes" or "no". If set to "yes", then for 287 programs intended to be run on the compile host, the name, 288 release, and architecture of the host operating system will 289 be suffixed to the name of the object directory created by 290 "make obj". (This allows multiple host systems to compile 291 NetBSD for a single target.) If set to "no", then programs 292 built to be run on the compile host will use the same object 293 directory names as programs built to be run on the target. 294 295 Default: "no" 296 297 MKINFO Can be set to "yes" or "no". Indicates whether GNU Info 298 files, used for the documentation for most of the compilation 299 tools, will be created and installed during a build. 300 301 Default: "yes" 302 303 MKKDEBUG Can be set to "yes" or "no". Force generation of full-debug 304 symbol versions of all kernels compiled. Alongside of the 305 netbsd kernel file, an unstripped version netbsd.gdb is 306 created. This is useful if a cross-gdb is built as well (see 307 MKCROSSGDB). 308 309 Default: "no" 310 311 MKKMOD Can be set to "yes" or "no". Indicates whether kernel 312 modules are built and installed. 313 314 Default: "yes" 315 316 MKLINT Can be set to "yes" or "no". Indicates whether lint(1) will 317 be run against portions of the NetBSD source code during the 318 build, and whether lint libraries will be installed into 319 DESTDIR/usr/libdata/lint. 320 321 Default: "yes" 322 323 MKMAN Can be set to "yes" or "no". Indicates whether manual pages 324 will be installed during a build. 325 326 Default: "yes" 327 328 MKNLS Can be set to "yes" or "no". Indicates whether Native 329 Language System locale zone files will be compiled and 330 installed during a build. 331 332 Default: "yes" 333 334 MKOBJ Can be set to "yes" or "no". Indicates whether object 335 directories will be created when running "make obj". If set 336 to "no", then all built files will be located inside the 337 regular source tree. 338 339 Default: "yes" 340 341 Note that setting MKOBJ to "no" is not recommended and may 342 cause problems when updating the tree with cvs(1). 343 344 MKPIC Can be set to "yes" or "no". Indicates whether shared 345 objects and libraries will be created and installed during a 346 build. If set to "no", the entire built system will be 347 statically linked. 348 349 Default: Platform dependent. As of this writing, all 350 platforms except sh3 default to "yes". 351 352 MKPICINSTALL 353 Can be set to "yes" or "no". Indicates whether the ar(1) 354 format libraries (lib*_pic.a), used to generate shared 355 libraries, are installed during a build. 356 357 Default: "yes" 358 359 MKPROFILE Can be set to "yes" or "no". Indicates whether profiled 360 libraries (lib*_p.a) will be built and installed during a 361 build. 362 363 Default: "yes"; however, some platforms turn off MKPROFILE by 364 default at times due to toolchain problems with profiled 365 code. 366 367 MKREPRO Can be set to "yes" or "no". Create reproducible builds. 368 This enables different switches to make two builds from the 369 same source tree result in the same build results. 370 371 Default: "no" This may be set to "yes" by giving build.sh the 372 -P option. 373 374 MKREPRO_TIMESTAMP 375 Unix timestamp. When MKREPRO is set, the timestamp of all 376 files in the sets will be set to this value. 377 378 Default: Unset. This may be set automatically to the latest 379 source tree timestamp using cvslatest(1) by giving build.sh 380 the -P option. 381 382 MKSHARE Can be set to "yes" or "no". Indicates whether files 383 destined to reside in DESTDIR/usr/share will be built and 384 installed during a build. If set to "no", then all of 385 MKCATPAGES, MKDOC, MKINFO, MKMAN, and MKNLS will be set to 386 "no" unconditionally. 387 388 Default: "yes" 389 390 MKSTRIPIDENT 391 Can be set to "yes" or "no". Indicates whether RCS IDs, for 392 use with ident(1), should be stripped from program binaries 393 and shared libraries. 394 395 Default: "no" 396 397 MKSTRIPSYM Can be set to "yes" or "no". Indicates whether all local 398 symbols should be stripped from shared libraries. If "yes", 399 strip all local symbols from shared libraries; the affect is 400 equivalent to the -x option of ld(1). If "no", strip only 401 temporary local symbols; the affect is equivalent to the -X 402 option of ld(1). Keeping non-temporary local symbols such as 403 static function names is useful on using DTrace for userland 404 libraries and getting a backtrace from a rump kernel loading 405 shared libraries. 406 407 Default: "yes" 408 409 MKUNPRIVED Can be set to "yes" or "no". Indicates whether an 410 unprivileged install will occur. The user, group, 411 permissions, and file flags, will not be set on the installed 412 items; instead the information will be appended to a file 413 called METALOG in DESTDIR. The contents of METALOG are used 414 during the generation of the distribution tar files to ensure 415 that the appropriate file ownership is stored. 416 417 Default: "no" 418 419 MKUPDATE Can be set to "yes" or "no". Indicates whether all install 420 operations intended to write to DESTDIR will compare file 421 timestamps before installing, and skip the install phase if 422 the destination files are up-to-date. This also has 423 implications on full builds (see next subsection). 424 425 Default: "no" 426 427 MKX11 Can be set to "yes" or "no". Indicates whether X11 is built 428 from X11SRCDIR. 429 430 Default: "no" 431 432 TOOLDIR Directory to hold the host tools, once built. If specified, 433 must be an absolute path. This directory should be unique to 434 a given host system and NetBSD source tree. (However, 435 multiple targets may share the same TOOLDIR; the target- 436 dependent files have unique names.) If unset, a default 437 based on the uname(1) information of the host platform will 438 be created in the .OBJDIR of src. 439 440 Default: Unset. 441 442 USETOOLS Indicates whether the tools specified by TOOLDIR should be 443 used as part of a build in progress. Must be set to "yes" if 444 cross-compiling. 445 446 yes Use the tools from TOOLDIR. 447 448 no Do not use the tools from TOOLDIR, but refuse to build 449 native compilation tool components that are version- 450 specific for that tool. 451 452 never Do not use the tools from TOOLDIR, even when building 453 native tool components. This is similar to the 454 traditional NetBSD build method, but does not verify 455 that the compilation tools in use are up-to-date 456 enough in order to build the tree successfully. This 457 may cause build or runtime problems when building the 458 whole NetBSD source tree. 459 460 Default: "yes", unless TOOLCHAIN_MISSING is set to "yes". 461 462 USETOOLS is also set to "no" when using <bsd.*.mk> outside 463 the NetBSD source tree. 464 465 X11SRCDIR Directory containing the modular Xorg source. If specified, 466 must be an absolute path. The main modular Xorg source is 467 found in X11SRCDIR/external/mit. 468 469 Default: NETBSDRCDIR/../xsrc, if that exists; otherwise 470 /usr/xsrc. 471 472 "make" variables for full builds 473 These variables only affect the top level "Makefile" and do not affect 474 manually building subtrees of the NetBSD source code. 475 476 INSTALLWORLDDIR Location for the "make installworld" target to install 477 to. If specified, must be an absolute path. 478 479 Default: "/" 480 481 MKOBJDIRS Can be set to "yes" or "no". Indicates whether object 482 directories will be created automatically (via a "make 483 obj" pass) at the start of a build. 484 485 Default: "no" 486 487 If using build.sh, the default is "yes". This may be 488 set back to "no" by giving build.sh the -o option. 489 490 MKUPDATE Can be set to "yes" or "no". If set, then in addition 491 to the effects described for MKUPDATE=yes above, this 492 implies the effects of NOCLEANDIR (i.e., "make cleandir" 493 is avoided). 494 495 Default: "no" 496 497 If using build.sh, this may be set by giving the -u 498 option. 499 500 NBUILDJOBS Now obsolete. Use the make(1) option -j, instead. See 501 below. 502 503 Default: Unset. 504 505 NOCLEANDIR If set, avoids the "make cleandir" phase of a full 506 build. This has the effect of allowing only changed 507 files in a source tree to be recompiled. This can speed 508 up builds when updating only a few files in the tree. 509 510 Default: Unset. 511 512 See also MKUPDATE. 513 514 NODISTRIBDIRS If set, avoids the "make distrib-dirs" phase of a full 515 build. This skips running mtree(8) on DESTDIR, useful 516 on systems where building as an unprivileged user, or 517 where it is known that the system-wide mtree files have 518 not changed. 519 520 Default: Unset. 521 522 NOINCLUDES If set, avoids the "make includes" phase of a full 523 build. This has the effect of preventing make(1) from 524 thinking that some programs are out-of-date simply 525 because the system include files have changed. However, 526 this option should not be used when updating the entire 527 NetBSD source tree arbitrarily; it is suggested to use 528 MKUPDATE=yes instead in that case. 529 530 Default: Unset. 531 532 RELEASEDIR If set, specifies the directory to which a release(7) 533 layout will be written at the end of a "make release". 534 If specified, must be an absolute path. 535 536 Default: Unset. 537 538 Note: build.sh will provide a default of releasedir (in 539 the top-level .OBJDIR) unless run in `expert' mode. 540 541 BUILDING 542 "make" command line options 543 This is not a summary of all the options available to make(1); only the 544 options used most frequently with NetBSD builds are listed here. 545 546 -j njob Run up to njob make(1) subjobs in parallel. Makefiles should 547 use .WAIT or have explicit dependencies as necessary to 548 enforce build ordering. 549 550 -m dir Specify the default directory for searching for system 551 Makefile segments, mainly the <bsd.*.mk> files. When building 552 any full NetBSD source tree, this should be set to the 553 "share/mk" directory in the source tree. This is set 554 automatically when building from the top level, or when using 555 build.sh. 556 557 -n Display the commands that would have been executed, but do not 558 actually execute them. This will still cause recursion to 559 take place. 560 561 -V var Print make(1)'s idea of the value of var. Does not build any 562 targets. 563 564 var=value Set the variable var to value, overriding any setting 565 specified by the process environment, the MAKECONF 566 configuration file, or the system Makefile segments. 567 568 "make" targets 569 These default targets may be built by running make(1) in any subtree of 570 the NetBSD source code. It is recommended that none of these be used 571 from the top level Makefile; as a specific exception, "make obj" and 572 "make cleandir" are useful in that context. 573 574 all Build programs, libraries, and preformatted documentation. 575 576 clean Remove program and library object code files. 577 578 cleandir Same as clean, but also remove preformatted documentation, 579 dependency files generated by "make depend", and any other 580 files known to be created at build time. 581 582 depend Create dependency files (.depend) containing more detailed 583 information about the dependencies of source code on header 584 files. Allows programs to be recompiled automatically when a 585 dependency changes. 586 587 dependall Does a "make depend" immediately followed by a "make all". 588 This improves cache locality of the build since both passes 589 read the source files in their entirety. 590 591 distclean Synonym for cleandir. 592 593 includes Build and install system header files. Typically needed 594 before any system libraries or programs can be built. 595 596 install Install programs, libraries, and documentation into DESTDIR. 597 Few files will be installed to DESTDIR/dev, DESTDIR/etc, 598 DESTDIR/root or DESTDIR/var in order to prevent user supplied 599 configuration data from being overwritten. 600 601 lint Run lint(1) against the C source code, where appropriate, and 602 generate system-installed lint libraries. 603 604 obj Create object directories to be used for built files, instead 605 of building directly in the source tree. 606 607 tags Create ctags(1) searchable function lists usable by the ex(1) 608 and vi(1) text editors. 609 610 "make" targets for the top level 611 Additional make(1) targets are usable specifically from the top source 612 level to facilitate building the entire NetBSD source tree. 613 614 build Build the entire NetBSD system (except the kernel). This 615 orders portions of the source tree such that prerequisites 616 will be built in the proper order. 617 618 distribution Do a "make build", and then install a full distribution 619 (which does not include a kernel) into DESTDIR, including 620 files in DESTDIR/dev, DESTDIR/etc, DESTDIR/root and 621 DESTDIR/var. 622 623 buildworld As per "make distribution", except that it ensures that 624 DESTDIR is not the root directory. 625 626 installworld Install the distribution from DESTDIR to INSTALLWORLDDIR, 627 which defaults to the root directory. Ensures that 628 INSTALLWORLDDIR is not the root directory if cross 629 compiling. 630 631 The INSTALLSETS environment variable may be set to a space- 632 separated list of distribution sets to be installed. By 633 default, all sets except "etc" and "xetc" are installed, so 634 most files in INSTALLWORLDDIR/etc will not be installed or 635 modified. 636 637 Note: Before performing this operation with 638 INSTALLWORLDDIR=/, it is highly recommended that you 639 upgrade your kernel and reboot. After performing this 640 operation, it is recommended that you use etcupdate(8) to 641 update files in INSTALLWORLDDIR/etc, and postinstall(8) to 642 check for or fix inconsistencies. 643 644 sets Create distribution sets from DESTDIR into 645 RELEASEDIR/RELEASEMACHINEDIR/binary/sets. Should be run 646 after "make distribution", as "make build" alone does not 647 install all of the required files. 648 649 sourcesets Create source sets of the source tree into 650 RELEASEDIR/source/sets. 651 652 syspkgs Create syspkgs from DESTDIR into 653 RELEASEDIR/RELEASEMACHINEDIR/binary/syspkgs. Should be run 654 after "make distribution", as "make build" alone does not 655 install all of the required files. 656 657 release Do a "make distribution", build kernels, distribution 658 media, and install sets (this as per "make sets"), and then 659 package the system into a standard release layout as 660 described by release(7). This requires that RELEASEDIR be 661 set (see above). 662 663 iso-image Create a NetBSD installation CD-ROM image in the 664 RELEASEDIR/images directory. The CD-ROM file system will 665 have a layout as described in release(7). 666 667 For most machine types, the CD-ROM will be bootable, and 668 will automatically run the sysinst(8) menu-based 669 installation program, which can be used to install or 670 upgrade a NetBSD system. Bootable CD-ROMs also contain 671 tools that may be useful in repairing a damaged NetBSD 672 installation. 673 674 Before "make iso-image" is attempted, RELEASEDIR must be 675 populated by "make release" or equivalent. 676 677 Note that other, smaller, CD-ROM images may be created in 678 the RELEASEDIR/RELEASEMACHINEDIR/installation/cdrom 679 directory by "make release". These smaller images usually 680 contain the same tools as the larger images in 681 RELEASEDIR/images, but do not contain additional content 682 such as the distribution sets. 683 684 Note that the mac68k port still uses an older method of 685 creating CD-ROM images. This requires the mkisofs(1) 686 utility, which is not part of NetBSD, but which can be 687 installed from pkgsrc/sysutils/cdrtools. 688 689 iso-image-source 690 Create a NetBSD installation CD-ROM image in the 691 RELEASEDIR/images directory. The CD-ROM file system will 692 have a layout as described in release(7). It will have top 693 level directories for the machine type and source. 694 695 For most machine types, the CD-ROM will be bootable, and 696 will automatically run the sysinst(8) menu-based 697 installation program, which can be used to install or 698 upgrade a NetBSD system. Bootable CD-ROMs also contain 699 tools that may be useful in repairing a damaged NetBSD 700 installation. 701 702 Before "make iso-image-source" is attempted, RELEASEDIR 703 must be populated by "make sourcesets release" or 704 equivalent. 705 706 Note that other, smaller, CD-ROM images may be created in 707 the RELEASEDIR/RELEASEMACHINEDIR/installation/cdrom 708 directory by "make release". These smaller images usually 709 contain the same tools as the larger images in 710 RELEASEDIR/images, but do not contain additional content 711 such as the distribution sets. 712 713 Note that the mac68k port still uses an older method of 714 creating CD-ROM images. This requires the mkisofs(1) 715 utility, which is not part of NetBSD, but which can be 716 installed from pkgsrc/sysutils/cdrtools. 717 718 install-image 719 Create a bootable NetBSD installation disk image in the 720 RELEASEDIR/RELEASEMACHINEDIR/installation/installimage 721 directory. The installation disk image is suitable for 722 copying to bootable USB flash memory sticks, etc., for 723 machines which are able to boot from such devices. The 724 file system in the bootable disk image will have a layout 725 as described in release(7). 726 727 The installation image is bootable, and will automatically 728 run the sysinst(8) menu-based installation program, which 729 can be used to install or upgrade a NetBSD system. The 730 image also contains tools that may be useful in repairing a 731 damaged NetBSD installation. 732 733 Before "make install-image" is attempted, RELEASEDIR must 734 be populated by "make release" or equivalent. The build 735 must have been performed with MKUNPRIVED=yes because "make 736 install-image" relies on information in DESTDIR/METALOG. 737 738 live-image Create NetBSD live images in the RELEASEDIR/images 739 directory. The live image contains all necessary files to 740 boot NetBSD up to multi-user mode, including all files 741 which should be extracted during installation, NetBSD 742 disklabel, bootloaders, etc. 743 744 The live image is suitable for use as a disk image in 745 virtual machine environments such as QEMU, and also useful 746 to boot NetBSD from a USB flash memory stick on a real 747 machine, without the need for installation. 748 749 Before "make live-image" is attempted, RELEASEDIR must be 750 populated by "make release" or equivalent. The build must 751 have been performed with MKUNPRIVED=yes because "make 752 install-image" relies on information in DESTDIR/METALOG. 753 754 regression-tests 755 Can only be run after building the regression tests in the 756 directory "regress". Runs those compiled regression tests 757 on the local host. Note that most tests are now managed 758 instead using atf(7); this target should probably run those 759 as well but currently does not. 760 761 The "build.sh" script 762 This script file is a shell script designed to build the entire NetBSD 763 system on any host with a suitable modern shell and some common 764 utilities. The required shell features are described under the HOST_SH 765 variable. 766 767 If a host system's default shell does support the required features, then 768 we suggest that you explicitly specify a suitable shell using a command 769 like 770 771 /path/to/suitable/shell build.sh [options] 772 773 The above command will usually enable build.sh to automatically set 774 HOST_SH=/path/to/suitable/shell, but if that fails, then the following 775 set of commands may be used instead: 776 777 HOST_SH=/path/to/suitable/shell 778 export HOST_SH 779 ${HOST_SH} build.sh [options] 780 781 If build.sh detects that it is being executed under an unsuitable shell, 782 it attempts to exec a suitable shell instead, or prints an error message. 783 If HOST_SH is not set explicitly, then build.sh sets a default using 784 heuristics dependent on the host platform, or from the shell under which 785 build.sh is executed (if that can be determined), or using the first copy 786 of sh found in PATH. 787 788 All cross-compile builds, and most native builds, of the entire system 789 should make use of build.sh rather than just running "make". This way, 790 the make(1) program will be bootstrapped properly, in case the host 791 system has an older or incompatible "make" program. 792 793 When compiling the entire system via build.sh, many make(1) variables are 794 set for you in order to help encapsulate the build process. In the list 795 of options below, variables that are automatically set by build.sh are 796 noted where applicable. 797 798 The following operations are supported by build.sh: 799 800 build Build the system as per "make build". Before the main part 801 of the build commences, this command runs the obj operation 802 (unless the -o option is given), "make cleandir" (unless 803 the -u option is given), and the tools operation. 804 805 distribution Build a full distribution as per "make distribution". This 806 command first runs the build operation. 807 808 release Build a full release as per "make release". This command 809 first runs the distribution operation. 810 811 makewrapper Create the nbmake-MACHINE wrapper. This operation is 812 automatically performed for any of the other operations. 813 814 cleandir Perform "make cleandir". 815 816 obj Perform "make obj". 817 818 tools Build and install the host tools from src/tools. This 819 command will first run "make obj" and "make cleandir" in 820 the tools subdirectory unless the -o or -u options 821 (respectively) are given. 822 823 install=idir Install the contents of DESTDIR to idir, using "make 824 installworld". Note that files that are part of the "etc" 825 or "xetc" sets will not be installed, unless overridden by 826 the INSTALLSETS environment variable. 827 828 kernel=kconf Build a new kernel. The kconf argument is the name of a 829 configuration file suitable for use by config(1). If kconf 830 does not contain any `/' characters, the configuration file 831 is expected to be found in the KERNCONFDIR directory, which 832 is typically sys/arch/MACHINE/conf. The new kernel will be 833 built in a subdirectory of KERNOBJDIR, which is typically 834 sys/arch/MACHINE/compile or an associated object directory. 835 836 This command does not imply the tools command; run the 837 tools command first unless it is certain that the tools 838 already exist and are up to date. 839 840 This command will run "make cleandir" on the kernel in 841 question first unless the -u option is given. 842 843 kernel.gdb=kconf 844 Build a new kernel with debug information. Similar to the 845 above kernel=kconf operation, but creates a netbsd.gdb file 846 alongside of the kernel netbsd, which contains a full 847 symbol table and can be used for debugging (for example 848 with a cross-gdb built by MKCROSSGDB). 849 850 kernels This command will build all kernels defined in port 851 specific release build procedure. 852 853 This command internally calls the kernel=kconf operation 854 for each found kernel configuration file. 855 856 modules This command will build kernel modules and install them 857 into DESTDIR. 858 859 releasekernel=kconf 860 Install a gzip(1)ed copy of the kernel previously built by 861 kernel=kconf into 862 RELEASEDIR/RELEASEMACHINEDIR/binary/kernel, usually as 863 netbsd-kconf.gz, although the "netbsd" prefix is determined 864 from the "config" directives in kconf. 865 866 sets Perform "make sets". 867 868 sourcesets Perform "make sourcesets". 869 870 syspkgs Perform "make syspkgs". 871 872 iso-image Perform "make iso-image". 873 874 iso-image-source 875 Perform "make iso-image-source". 876 877 install-image 878 Perform "make install-image". 879 880 live-image Perform "make live-image". 881 882 list-arch Prints a list of valid MACHINE and MACHINE_ARCH settings, 883 the default MACHINE_ARCH for each MACHINE, and aliases for 884 MACHINE/MACHINE_ARCH pairs, and then exits. The -m or -a 885 options (or both) may be used to specify glob patterns that 886 will be used to narrow the list of results; for example, 887 "build.sh -m 'evm*' -a '*arm*' list-arch" will list all 888 known MACHINE/MACHINE_ARCH values in which either MACHINE 889 or ALIAS matches the pattern `evb*', and MACHINE_ARCH 890 matches the pattern `*arm*'. 891 892 The following command line options alter the behaviour of the build.sh 893 operations described above: 894 895 -a arch Set the value of MACHINE_ARCH to arch. See the -m option for 896 more information. 897 898 -B buildid 899 Set the value of BUILDID to buildid. This will also append the 900 build identifier to the name of the "make" wrapper script so 901 that the resulting name is of the form 902 "nbmake-MACHINE-BUILDID". 903 904 -C cdextras 905 Append cdextras to the CDEXTRA variable, which is a space- 906 separated list of files or directories that will be added to 907 the CD-ROM image that may be create by the "iso-image" or 908 "iso-image-source" operations. Files will be added to the root 909 of the CD-ROM image, whereas directories will be copied 910 recursively. If relative paths are specified, they will be 911 converted to absolute paths before being used. Multiple paths 912 may be specified via multiple -C options, or via a single 913 option whose argument contains multiple space-separated paths. 914 915 -D dest Set the value of DESTDIR to dest. If a relative path is 916 specified, it will be converted to an absolute path before 917 being used. 918 919 -E Set `expert' mode. This overrides various sanity checks, and 920 allows: DESTDIR does not have to be set to a non-root path for 921 builds, and MKUNPRIVED=yes does not have to be set when 922 building as a non-root user. 923 924 Note: It is highly recommended that you know what you are doing 925 when you use this option. 926 927 -h Print a help message. 928 929 -j njob Run up to njob make(1) subjobs in parallel; passed through to 930 make(1). If you see failures for reasons other than running 931 out of memory while using build.sh with -j, please save 932 complete build logs so the failures can be analyzed. 933 934 To achieve the fastest builds, -j values between (1 + the 935 number of CPUs) and (2 * the number of CPUs) are recommended. 936 Use lower values on machines with limited memory or I/O 937 bandwidth. 938 939 -M obj Set MAKEOBJDIRPREFIX to obj. Unsets MAKEOBJDIR. See "-O obj" 940 for more information. 941 942 For instance, if the source directory is /usr/src, a setting of 943 "-M /usr/obj" will place build-time files under 944 /usr/obj/usr/src/bin, /usr/obj/usr/src/lib, 945 /usr/obj/usr/src/usr.bin, and so forth. 946 947 If a relative path is specified, it will be converted to an 948 absolute path before being used. build.sh imposes the 949 restriction that the argument to the -M option must not begin 950 with a "$" (dollar sign) character; otherwise it would be too 951 difficult to determine whether the value is an absolute or a 952 relative path. If the directory does not already exist, 953 build.sh will create it. 954 955 -m mach Set the value of MACHINE to mach, unless the mach argument is 956 an alias that refers to a MACHINE/MACHINE_ARCH pair, in which 957 case both MACHINE and MACHINE_ARCH are set from the alias. 958 Such aliases are interpreted entirely by build.sh; they are not 959 used by any other part of the build system. The MACHINE_ARCH 960 setting implied by mach will override any value of MACHINE_ARCH 961 in the process environment, but will not override a value set 962 by the -a option. All cross builds require -m, but if unset on 963 a NetBSD host, the host's value of MACHINE will be detected and 964 used automatically. 965 966 See the list-arch operation for a way to get a list of valid 967 MACHINE and MACHINE_ARCH settings. 968 969 -N noiselevel 970 Set the "noisyness" level of the build, by setting MAKEVERBOSE 971 to noiselevel. 972 973 -n Show the commands that would be executed by build.sh, but do 974 not make any changes. This is similar in concept to "make -n". 975 976 -O obj Create an appropriate transform macro for MAKEOBJDIR that will 977 place the built object files under obj. Unsets 978 MAKEOBJDIRPREFIX. 979 980 For instance, a setting of "-O /usr/obj" will place build-time 981 files under /usr/obj/bin, /usr/obj/lib, /usr/obj/usr.bin, and 982 so forth. 983 984 If a relative path is specified, it will be converted to an 985 absolute path before being used. build.sh imposes the 986 restriction that the argument to the -O option must not contain 987 a "$" (dollar sign) character. If the directory does not 988 already exist, build.sh will create it. 989 990 In normal use, exactly one of the -M or -O options should be 991 specified. If neither -M nor -O is specified, then a default 992 object directory will be chosen according to rules in 993 <bsd.obj.mk>. Relying on this default is not recommended 994 because it is determined by complex rules that are influenced 995 by the values of several variables and by the location of the 996 source directory. 997 998 Note that placing the obj directory location outside of the 999 default source tree hierarchy makes it easier to manually clear 1000 out old files in the event the "make cleandir" operation is 1001 unable to do so. (See CAVEATS below.) 1002 1003 Note also that use of one of -M or -O is the only means of 1004 building multiple machine architecture userlands from the same 1005 source tree without cleaning between builds (in which case, one 1006 would specify distinct obj locations for each). 1007 1008 -o Set the value of MKOBJDIRS to "no". Otherwise, it will be 1009 automatically set to "yes". This default is opposite to the 1010 behaviour when not using build.sh. 1011 1012 -R rel Set the value of RELEASEDIR to rel. If a relative path is 1013 specified, it will be converted to an absolute path before 1014 being used. 1015 1016 -r Remove the contents of DESTDIR and TOOLDIR before building 1017 (provides a clean starting point). This will skip deleting 1018 DESTDIR if building on a native system to the root directory. 1019 1020 -S seed Change the value of BUILDSEED to seed. This should rarely be 1021 necessary. 1022 1023 -T tools Set the value of TOOLDIR to tools. If a relative path is 1024 specified, it will be converted to an absolute path before 1025 being used. If set, the bootstrap "make" will only be rebuilt 1026 if the source files for make(1) have changed. 1027 1028 -U Set MKUNPRIVED=yes. 1029 1030 -u Set MKUPDATE=yes. 1031 1032 -V var=[value] 1033 Set the environment variable var to an optional value. This is 1034 propagated to the nbmake wrapper. 1035 1036 -w wrapper 1037 Create the nbmake wrapper script (see below) in a custom 1038 location, specified by wrapper. This allows, for instance, to 1039 place the wrapper in PATH automatically. Note that wrapper is 1040 the full name of the file, not just a directory name. If a 1041 relative path is specified, it will be converted to an absolute 1042 path before being used. 1043 1044 -X x11src 1045 Set the value of X11SRCDIR to x11src. If a relative path is 1046 specified, it will be converted to an absolute path before 1047 being used. 1048 1049 -x Set MKX11=yes. 1050 1051 -Y extsrcdir 1052 Set the value of EXTSRCSRCDIR to extsrcdir. If a relative path 1053 is specified, it will be converted to an absolute path before 1054 being used. 1055 1056 -y Set MKEXTSRC=yes. 1057 1058 -Z var Unset ("zap") the environment variable var. This is propagated 1059 to the nbmake wrapper. 1060 1061 The "nbmake-MACHINE" wrapper script 1062 If using the build.sh script to build NetBSD, a nbmake-MACHINE script 1063 will be created in TOOLDIR/bin upon the first build to assist in building 1064 subtrees on a cross-compile host. 1065 1066 nbmake-MACHINE can be invoked in lieu of make(1), and will instead call 1067 the up-to-date version of "nbmake" installed into TOOLDIR/bin with 1068 several key variables pre-set, including MACHINE, MACHINE_ARCH, and 1069 TOOLDIR. nbmake-MACHINE will also set variables specified with -V, and 1070 unset variables specified with -Z. 1071 1072 This script can be symlinked into a directory listed in PATH, or called 1073 with an absolute path. 1074 1075 EXAMPLES 1076 1. % ./build.sh [options] tools kernel=GENERIC 1077 1078 Build a new toolchain, and use the new toolchain to configure and 1079 build a new GENERIC kernel. 1080 1081 2. % ./build.sh [options] -U distribution 1082 1083 Using unprivileged mode, build a complete distribution to a DESTDIR 1084 directory that build.sh selects (and will display). 1085 1086 3. # ./build.sh [options] -U install=/ 1087 1088 As root, install to / the distribution that was built by example 2. 1089 Even though this is run as root, -U is required so that the 1090 permissions stored in DESTDIR/METALOG are correctly applied to the 1091 files as they're copied to /. 1092 1093 4. % ./build.sh [options] -U -u release 1094 1095 Using unprivileged mode, build a complete release to DESTDIR and 1096 RELEASEDIR directories that build.sh selects (and will display). 1097 MKUPDATE=yes (-u) is set to prevent the "make cleandir", so that if 1098 this is run after example 2, it doesn't need to redo that portion of 1099 the release build. 1100 1101 OBSOLETE VARIABLES 1102 NBUILDJOBS Use the make(1) option -j instead. 1103 1104 USE_NEW_TOOLCHAIN 1105 The new toolchain is now the default. To disable, use 1106 TOOLCHAIN_MISSING=yes. 1107 1108 SEE ALSO 1109 make(1), hier(7), release(7), etcupdate(8), postinstall(8), sysinst(8), 1110 pkgsrc/sysutils/cdrtools 1111 1112 HISTORY 1113 The build.sh based build scheme was introduced for NetBSD 1.6 as 1114 USE_NEW_TOOLCHAIN, and re-worked to TOOLCHAIN_MISSING after that. 1115 1116 CAVEATS 1117 After significant updates to third-party components in the source tree, 1118 the "make cleandir" operation may be insufficient to clean out old files 1119 in object directories. Instead, one may have to manually remove the 1120 files. Consult the UPDATING file for notices concerning this. 1121 1122 NetBSD April 13, 2017 NetBSD 1123
Indexes created Fri Oct 10 14:10:03 GMT 2025