1 # Copyright (c) 2013 The Chromium OS Authors.
3 # SPDX-License-Identifier: GPL-2.0+
9 This tool handles building U-Boot to check that you have not broken it
10 with your patch series. It can build each individual commit and report
11 which boards fail on which commits, and which errors come up. It aims
12 to make full use of multi-processor machines.
14 A key feature of buildman is its output summary, which allows warnings,
15 errors or image size increases in a particular commit or board to be
16 quickly identified and the offending commit pinpointed. This can be a big
17 help for anyone working with >10 patches at a time.
23 Buildman is still in its infancy. It is already a very useful tool, but
24 expect to find problems and send patches.
26 Buildman can be stopped and restarted, in which case it will continue
27 where it left off. This should happen cleanly and without side-effects.
28 If not, it is a bug, for which a patch would be welcome.
30 Buildman gets so tied up in its work that it can ignore the outside world.
31 You may need to press Ctrl-C several times to quit it. Also it will print
32 out various exceptions when stopped.
38 (please read this section in full twice or you will be perpetually confused)
40 Buildman is a builder. It is not make, although it runs make. It does not
41 produce any useful output on the terminal while building, except for
42 progress information. All the output (errors, warnings and binaries if you
43 are ask for them) is stored in output directories, which you can look at
44 while the build is progressing, or when it is finished.
46 Buildman produces a concise summary of which boards succeeded and failed.
47 It shows which commit introduced which board failure using a simple
48 red/green colour coding. Full error information can be requested, in which
49 case it is de-duped and displayed against the commit that introduced the
50 error. An example workflow is below.
52 Buildman stores image size information and can report changes in image size
53 from commit to commit. An example of this is below.
55 Buildman starts multiple threads, and each thread builds for one board at
56 a time. A thread starts at the first commit, configures the source for your
57 board and builds it. Then it checks out the next commit and does an
58 incremental build. Eventually the thread reaches the last commit and stops.
59 If errors or warnings are found along the way, the thread will reconfigure
60 after every commit, and your build will be very slow. This is because a
61 file that produces just a warning would not normally be rebuilt in an
64 Buildman works in an entirely separate place from your U-Boot repository.
65 It creates a separate working directory for each thread, and puts the
66 output files in the working directory, organised by commit name and board
67 name, in a two-level hierarchy.
69 Buildman is invoked in your U-Boot directory, the one with the .git
70 directory. It clones this repository into a copy for each thread, and the
71 threads do not affect the state of your git repository. Any checkouts done
72 by the thread affect only the working directory for that thread.
74 Buildman automatically selects the correct toolchain for each board. You
75 must supply suitable toolchains, but buildman takes care of selecting the
78 Buildman always builds a branch, and always builds the upstream commit as
79 well, for comparison. It cannot build individual commits at present, unless
80 (maybe) you point it at an empty branch. Put all your commits in a branch,
81 set the branch's upstream to a valid value, and all will be well. Otherwise
82 buildman will perform random actions. Use -n to check what the random
85 Buildman is optimised for building many commits at once, for many boards.
86 On multi-core machines, Buildman is fast because it uses most of the
87 available CPU power. When it gets to the end, or if you are building just
88 a few commits or boards, it will be pretty slow. As a tip, if you don't
89 plan to use your machine for anything else, you can use -T to increase the
90 number of threads beyond the default.
92 Buildman lets you build all boards, or a subset. Specify the subset by passing
93 command-line arguments that list the desired board name, architecture name,
94 SOC name, or anything else in the boards.cfg file. Multiple arguments are
95 allowed. Each argument will be interpreted as a regular expression, so
96 behaviour is a superset of exact or substring matching. Examples are:
98 * 'tegra20' All boards with a Tegra20 SoC
99 * 'tegra' All boards with any Tegra Soc (Tegra20, Tegra30, Tegra114...)
100 * '^tegra[23]0$' All boards with either Tegra20 or Tegra30 SoC
101 * 'powerpc' All PowerPC boards
103 Buildman does not store intermediate object files. It optionally copies
104 the binary output into a directory when a build is successful. Size
105 information is always recorded. It needs a fair bit of disk space to work,
106 typically 250MB per thread.
112 1. Get the U-Boot source. You probably already have it, but if not these
113 steps should get you started with a repo and some commits for testing.
116 $ git clone git://git.denx.de/u-boot.git .
117 $ git checkout -b my-branch origin/master
118 $ # Add some commits to the branch, reading for testing
120 2. Create ~/.buildman to tell buildman where to find tool chains. As an
123 # Buildman settings file
138 This selects the available toolchain paths. Add the base directory for
139 each of your toolchains here. Buildman will search inside these directories
140 and also in any '/usr' and '/usr/bin' subdirectories.
142 Make sure the tags (here root: rest: and eldk:) are unique.
144 The toolchain-alias section indicates that the i386 toolchain should be used
145 to build x86 commits.
148 2. Check the available toolchains
150 Run this check to make sure that you have a toolchain for every architecture.
152 $ ./tools/buildman/buildman --list-tool-chains
153 Scanning for tool chains
157 - looking in '/usr/bin'
158 - found '/usr/bin/gcc'
160 - found '/usr/bin/c89-gcc'
162 - found '/usr/bin/c99-gcc'
164 - found '/usr/bin/x86_64-linux-gnu-gcc'
166 - scanning path '/toolchains/powerpc-linux'
167 - looking in '/toolchains/powerpc-linux/.'
168 - looking in '/toolchains/powerpc-linux/bin'
169 - found '/toolchains/powerpc-linux/bin/powerpc-linux-gcc'
171 - looking in '/toolchains/powerpc-linux/usr/bin'
172 - scanning path '/toolchains/nds32le-linux-glibc-v1f'
173 - looking in '/toolchains/nds32le-linux-glibc-v1f/.'
174 - looking in '/toolchains/nds32le-linux-glibc-v1f/bin'
175 - found '/toolchains/nds32le-linux-glibc-v1f/bin/nds32le-linux-gcc'
177 - looking in '/toolchains/nds32le-linux-glibc-v1f/usr/bin'
178 - scanning path '/toolchains/nios2'
179 - looking in '/toolchains/nios2/.'
180 - looking in '/toolchains/nios2/bin'
181 - found '/toolchains/nios2/bin/nios2-linux-gcc'
183 - found '/toolchains/nios2/bin/nios2-linux-uclibc-gcc'
185 - looking in '/toolchains/nios2/usr/bin'
186 - found '/toolchains/nios2/usr/bin/nios2-linux-gcc'
188 - found '/toolchains/nios2/usr/bin/nios2-linux-uclibc-gcc'
190 - scanning path '/toolchains/microblaze-unknown-linux-gnu'
191 - looking in '/toolchains/microblaze-unknown-linux-gnu/.'
192 - looking in '/toolchains/microblaze-unknown-linux-gnu/bin'
193 - found '/toolchains/microblaze-unknown-linux-gnu/bin/microblaze-unknown-linux-gnu-gcc'
195 - found '/toolchains/microblaze-unknown-linux-gnu/bin/mb-linux-gcc'
197 - looking in '/toolchains/microblaze-unknown-linux-gnu/usr/bin'
198 - scanning path '/toolchains/mips-linux'
199 - looking in '/toolchains/mips-linux/.'
200 - looking in '/toolchains/mips-linux/bin'
201 - found '/toolchains/mips-linux/bin/mips-linux-gcc'
203 - looking in '/toolchains/mips-linux/usr/bin'
204 - scanning path '/toolchains/old'
205 - looking in '/toolchains/old/.'
206 - looking in '/toolchains/old/bin'
207 - looking in '/toolchains/old/usr/bin'
208 - scanning path '/toolchains/i386-linux'
209 - looking in '/toolchains/i386-linux/.'
210 - looking in '/toolchains/i386-linux/bin'
211 - found '/toolchains/i386-linux/bin/i386-linux-gcc'
213 - looking in '/toolchains/i386-linux/usr/bin'
214 - scanning path '/toolchains/bfin-uclinux'
215 - looking in '/toolchains/bfin-uclinux/.'
216 - looking in '/toolchains/bfin-uclinux/bin'
217 - found '/toolchains/bfin-uclinux/bin/bfin-uclinux-gcc'
219 - looking in '/toolchains/bfin-uclinux/usr/bin'
220 - scanning path '/toolchains/sparc-elf'
221 - looking in '/toolchains/sparc-elf/.'
222 - looking in '/toolchains/sparc-elf/bin'
223 - found '/toolchains/sparc-elf/bin/sparc-elf-gcc'
225 - looking in '/toolchains/sparc-elf/usr/bin'
226 - scanning path '/toolchains/arm-2010q1'
227 - looking in '/toolchains/arm-2010q1/.'
228 - looking in '/toolchains/arm-2010q1/bin'
229 - found '/toolchains/arm-2010q1/bin/arm-none-linux-gnueabi-gcc'
231 - looking in '/toolchains/arm-2010q1/usr/bin'
232 - scanning path '/toolchains/from'
233 - looking in '/toolchains/from/.'
234 - looking in '/toolchains/from/bin'
235 - looking in '/toolchains/from/usr/bin'
236 - scanning path '/toolchains/sh4-gentoo-linux-gnu'
237 - looking in '/toolchains/sh4-gentoo-linux-gnu/.'
238 - looking in '/toolchains/sh4-gentoo-linux-gnu/bin'
239 - found '/toolchains/sh4-gentoo-linux-gnu/bin/sh4-gentoo-linux-gnu-gcc'
241 - looking in '/toolchains/sh4-gentoo-linux-gnu/usr/bin'
242 - scanning path '/toolchains/avr32-linux'
243 - looking in '/toolchains/avr32-linux/.'
244 - looking in '/toolchains/avr32-linux/bin'
245 - found '/toolchains/avr32-linux/bin/avr32-gcc'
247 - looking in '/toolchains/avr32-linux/usr/bin'
248 - scanning path '/toolchains/m68k-linux'
249 - looking in '/toolchains/m68k-linux/.'
250 - looking in '/toolchains/m68k-linux/bin'
251 - found '/toolchains/m68k-linux/bin/m68k-linux-gcc'
253 - looking in '/toolchains/m68k-linux/usr/bin'
254 List of available toolchains (17):
255 arm : /toolchains/arm-2010q1/bin/arm-none-linux-gnueabi-gcc
256 avr32 : /toolchains/avr32-linux/bin/avr32-gcc
257 bfin : /toolchains/bfin-uclinux/bin/bfin-uclinux-gcc
258 c89 : /usr/bin/c89-gcc
259 c99 : /usr/bin/c99-gcc
260 i386 : /toolchains/i386-linux/bin/i386-linux-gcc
261 m68k : /toolchains/m68k-linux/bin/m68k-linux-gcc
262 mb : /toolchains/microblaze-unknown-linux-gnu/bin/mb-linux-gcc
263 microblaze: /toolchains/microblaze-unknown-linux-gnu/bin/microblaze-unknown-linux-gnu-gcc
264 mips : /toolchains/mips-linux/bin/mips-linux-gcc
265 nds32le : /toolchains/nds32le-linux-glibc-v1f/bin/nds32le-linux-gcc
266 nios2 : /toolchains/nios2/bin/nios2-linux-gcc
267 powerpc : /toolchains/powerpc-linux/bin/powerpc-linux-gcc
268 sandbox : /usr/bin/gcc
269 sh4 : /toolchains/sh4-gentoo-linux-gnu/bin/sh4-gentoo-linux-gnu-gcc
270 sparc : /toolchains/sparc-elf/bin/sparc-elf-gcc
271 x86_64 : /usr/bin/x86_64-linux-gnu-gcc
274 You can see that everything is covered, even some strange ones that won't
275 be used (c88 and c99). This is a feature.
281 First do a dry run using the -n flag: (replace <branch> with a real, local
282 branch with a valid upstream)
284 $ ./tools/buildman/buildman -b <branch> -n
286 If it can't detect the upstream branch, try checking out the branch, and
287 doing something like 'git branch --set-upstream <branch> upstream/master'
288 or something similar.
292 Dry run, so not doing much. But I would do this:
294 Building 18 commits for 1059 boards (4 threads, 1 job per thread)
295 Build directory: ../lcd9b
296 5bb3505 Merge branch 'master' of git://git.denx.de/u-boot-arm
297 c18f1b4 tegra: Use const for pinmux_config_pingroup/table()
298 2f043ae tegra: Add display support to funcmux
299 e349900 tegra: fdt: Add pwm binding and node
300 424a5f0 tegra: fdt: Add LCD definitions for Tegra
301 0636ccf tegra: Add support for PWM
302 a994fe7 tegra: Add SOC support for display/lcd
303 fcd7350 tegra: Add LCD driver
304 4d46e9d tegra: Add LCD support to Nvidia boards
305 991bd48 arm: Add control over cachability of memory regions
306 54e8019 lcd: Add CONFIG_LCD_ALIGNMENT to select frame buffer alignment
307 d92aff7 lcd: Add support for flushing LCD fb from dcache after update
308 dbd0677 tegra: Align LCD frame buffer to section boundary
309 0cff9b8 tegra: Support control of cache settings for LCD
310 9c56900 tegra: fdt: Add LCD definitions for Seaboard
311 5cc29db lcd: Add CONFIG_CONSOLE_SCROLL_LINES option to speed console
312 cac5a23 tegra: Enable display/lcd support on Seaboard
315 Total boards to build for each commit: 1059
317 This shows that it will build all 1059 boards, using 4 threads (because
318 we have a 4-core CPU). Each thread will run with -j1, meaning that each
319 make job will use a single CPU. The list of commits to be built helps you
320 confirm that things look about right. Notice that buildman has chosen a
321 'base' directory for you, immediately above your source tree.
323 Buildman works entirely inside the base directory, here ../lcd9b,
324 creating a working directory for each thread, and creating output
325 directories for each commit and board.
331 To run the build for real, take off the -n:
333 $ ./tools/buildman/buildman -b <branch>
335 Buildman will set up some working directories, and get started. After a
336 minute or so it will settle down to a steady pace, with a display like this:
338 Building 18 commits for 1059 boards (4 threads, 1 job per thread)
339 528 36 124 /19062 1:13:30 : SIMPC8313_SP
341 This means that it is building 19062 board/commit combinations. So far it
342 has managed to succesfully build 528. Another 36 have built with warnings,
343 and 124 more didn't build at all. Buildman expects to complete the process
344 in an hour and 15 minutes. Use this time to buy a faster computer.
347 To find out how the build went, ask for a summary with -s. You can do this
348 either before the build completes (presumably in another terminal) or or
349 afterwards. Let's work through an example of how this is used:
351 $ ./tools/buildman/buildman -b lcd9b -s
353 01: Merge branch 'master' of git://git.denx.de/u-boot-arm
354 powerpc: + galaxy5200_LOWBOOT
355 02: tegra: Use const for pinmux_config_pingroup/table()
356 03: tegra: Add display support to funcmux
357 04: tegra: fdt: Add pwm binding and node
358 05: tegra: fdt: Add LCD definitions for Tegra
359 06: tegra: Add support for PWM
360 07: tegra: Add SOC support for display/lcd
361 08: tegra: Add LCD driver
362 09: tegra: Add LCD support to Nvidia boards
363 10: arm: Add control over cachability of memory regions
364 11: lcd: Add CONFIG_LCD_ALIGNMENT to select frame buffer alignment
365 12: lcd: Add support for flushing LCD fb from dcache after update
367 13: tegra: Align LCD frame buffer to section boundary
368 14: tegra: Support control of cache settings for LCD
369 15: tegra: fdt: Add LCD definitions for Seaboard
370 16: lcd: Add CONFIG_CONSOLE_SCROLL_LINES option to speed console
371 17: tegra: Enable display/lcd support on Seaboard
374 This shows which commits have succeeded and which have failed. In this case
375 the build is still in progress so many boards are not built yet (use -u to
376 see which ones). But still we can see a few failures. The galaxy5200_LOWBOOT
377 never builds correctly. This could be a problem with our toolchain, or it
378 could be a bug in the upstream. The good news is that we probably don't need
379 to blame our commits. The bad news is it isn't tested on that board.
381 Commit 12 broke lubbock. That's what the '+ lubbock' means. The failure
382 is never fixed by a later commit, or you would see lubbock again, in green,
385 To see the actual error:
387 $ ./tools/buildman/buildman -b <branch> -se lubbock
389 12: lcd: Add support for flushing LCD fb from dcache after update
391 +common/libcommon.o: In function `lcd_sync':
392 +/u-boot/lcd9b/.bm-work/00/common/lcd.c:120: undefined reference to `flush_dcache_range'
393 +arm-none-linux-gnueabi-ld: BFD (Sourcery G++ Lite 2010q1-202) 2.19.51.20090709 assertion fail /scratch/julian/2010q1-release-linux-lite/obj/binutils-src-2010q1-202-arm-none-linux-gnueabi-i686-pc-linux-gnu/bfd/elf32-arm.c:12572
394 +make: *** [/u-boot/lcd9b/.bm-work/00/build/u-boot] Error 139
395 13: tegra: Align LCD frame buffer to section boundary
396 14: tegra: Support control of cache settings for LCD
397 15: tegra: fdt: Add LCD definitions for Seaboard
398 16: lcd: Add CONFIG_CONSOLE_SCROLL_LINES option to speed console
399 -/u-boot/lcd9b/.bm-work/00/common/lcd.c:120: undefined reference to `flush_dcache_range'
400 +/u-boot/lcd9b/.bm-work/00/common/lcd.c:125: undefined reference to `flush_dcache_range'
401 17: tegra: Enable display/lcd support on Seaboard
404 So the problem is in lcd.c, due to missing cache operations. This information
405 should be enough to work out what that commit is doing to break these
406 boards. (In this case pxa did not have cache operations defined).
408 If you see error lines marked with - that means that the errors were fixed
409 by that commit. Sometimes commits can be in the wrong order, so that a
410 breakage is introduced for a few commits and fixed by later commits. This
411 shows up clearly with buildman. You can then reorder the commits and try
414 At commit 16, the error moves - you can see that the old error at line 120
415 is fixed, but there is a new one at line 126. This is probably only because
416 we added some code and moved the broken line futher down the file.
418 If many boards have the same error, then -e will display the error only
419 once. This makes the output as concise as possible.
421 The full build output in this case is available in:
423 ../lcd9b/12_of_18_gd92aff7_lcd--Add-support-for/lubbock/
425 done: Indicates the build was done, and holds the return code from make.
426 This is 0 for a good build, typically 2 for a failure.
428 err: Output from stderr, if any. Errors and warnings appear here.
430 log: Output from stdout. Normally there isn't any since buildman runs
431 in silent mode for now.
433 toolchain: Shows information about the toolchain used for the build.
435 sizes: Shows image size information.
437 It is possible to get the build output there also. Use the -k option for
438 this. In that case you will also see some output files, like:
440 System.map toolchain u-boot u-boot.bin u-boot.map autoconf.mk
441 (also SPL versions u-boot-spl and u-boot-spl.bin if available)
447 A key requirement for U-Boot is that you keep code/data size to a minimum.
448 Where a new feature increases this noticeably it should normally be put
449 behind a CONFIG flag so that boards can leave it off and keep the image
450 size more or less the same with each new release.
452 To check the impact of your commits on image size, use -S. For example:
454 $ ./tools/buildman/buildman -b us-x86 -sS
455 Summary of 10 commits for 1066 boards (4 threads, 1 job per thread)
456 01: MAKEALL: add support for per architecture toolchains
457 02: x86: Add function to get top of usable ram
458 x86: (for 1/3 boards) text -272.0 rodata +41.0
459 03: x86: Add basic cache operations
460 04: x86: Permit bootstage and timer data to be used prior to relocation
461 x86: (for 1/3 boards) data +16.0
462 05: x86: Add an __end symbol to signal the end of the U-Boot binary
463 x86: (for 1/3 boards) text +76.0
464 06: x86: Rearrange the output input to remove BSS
465 x86: (for 1/3 boards) bss -2140.0
466 07: x86: Support relocation of FDT on start-up
468 08: x86: Add error checking to x86 relocation code
469 09: x86: Adjust link device tree include file
470 10: x86: Enable CONFIG_OF_CONTROL on coreboot
473 You can see that image size only changed on x86, which is good because this
474 series is not supposed to change any other board. From commit 7 onwards the
475 build fails so we don't get code size numbers. The numbers are fractional
476 because they are an average of all boards for that architecture. The
477 intention is to allow you to quickly find image size problems introduced by
480 Note that the 'text' region and 'rodata' are split out. You should add the
481 two together to get the total read-only size (reported as the first column
482 in the output from binutil's 'size' utility).
484 A useful option is --step which lets you skip some commits. For example
485 --step 2 will show the image sizes for only every 2nd commit (so it will
486 compare the image sizes of the 1st, 3rd, 5th... commits). You can also use
487 --step 0 which will compare only the first and last commits. This is useful
488 for an overview of how your entire series affects code size.
490 You can also use -d to see a detailed size breakdown for each board. This
491 list is sorted in order from largest growth to largest reduction.
493 It is possible to go a little further with the -B option (--bloat). This
494 shows where U-Boot has bloted, breaking the size change down to the function
495 level. Example output is below:
497 $ ./tools/buildman/buildman -b us-mem4 -sSdB
499 19: Roll crc32 into hash infrastructure
500 arm: (for 10/10 boards) all -143.4 bss +1.2 data -4.8 rodata -48.2 text -91.6
501 paz00 : all +23 bss -4 rodata -29 text +56
502 u-boot: add: 1/0, grow: 3/-2 bytes: 168/-104 (64)
503 function old new delta
504 hash_command 80 160 +80
505 crc32_wd_buf - 56 +56
506 ext4fs_read_file 540 568 +28
507 insert_var_value_sub 688 692 +4
508 run_list_real 1996 1992 -4
509 do_mem_crc 168 68 -100
510 trimslice : all -9 bss +16 rodata -29 text +4
511 u-boot: add: 1/0, grow: 1/-3 bytes: 136/-124 (12)
512 function old new delta
513 hash_command 80 160 +80
514 crc32_wd_buf - 56 +56
515 ext4fs_iterate_dir 672 668 -4
516 ext4fs_read_file 568 548 -20
517 do_mem_crc 168 68 -100
518 whistler : all -9 bss +16 rodata -29 text +4
519 u-boot: add: 1/0, grow: 1/-3 bytes: 136/-124 (12)
520 function old new delta
521 hash_command 80 160 +80
522 crc32_wd_buf - 56 +56
523 ext4fs_iterate_dir 672 668 -4
524 ext4fs_read_file 568 548 -20
525 do_mem_crc 168 68 -100
526 seaboard : all -9 bss -28 rodata -29 text +48
527 u-boot: add: 1/0, grow: 3/-2 bytes: 160/-104 (56)
528 function old new delta
529 hash_command 80 160 +80
530 crc32_wd_buf - 56 +56
531 ext4fs_read_file 548 568 +20
532 run_list_real 1996 2000 +4
533 do_nandboot 760 756 -4
534 do_mem_crc 168 68 -100
535 colibri_t20_iris: all -9 rodata -29 text +20
536 u-boot: add: 1/0, grow: 2/-3 bytes: 140/-112 (28)
537 function old new delta
538 hash_command 80 160 +80
539 crc32_wd_buf - 56 +56
540 read_abs_bbt 204 208 +4
541 do_nandboot 760 756 -4
542 ext4fs_read_file 576 568 -8
543 do_mem_crc 168 68 -100
544 ventana : all -37 bss -12 rodata -29 text +4
545 u-boot: add: 1/0, grow: 1/-3 bytes: 136/-124 (12)
546 function old new delta
547 hash_command 80 160 +80
548 crc32_wd_buf - 56 +56
549 ext4fs_iterate_dir 672 668 -4
550 ext4fs_read_file 568 548 -20
551 do_mem_crc 168 68 -100
552 harmony : all -37 bss -16 rodata -29 text +8
553 u-boot: add: 1/0, grow: 2/-3 bytes: 140/-124 (16)
554 function old new delta
555 hash_command 80 160 +80
556 crc32_wd_buf - 56 +56
557 nand_write_oob_syndrome 428 432 +4
558 ext4fs_iterate_dir 672 668 -4
559 ext4fs_read_file 568 548 -20
560 do_mem_crc 168 68 -100
561 medcom-wide : all -417 bss +28 data -16 rodata -93 text -336
562 u-boot: add: 1/-1, grow: 1/-2 bytes: 88/-376 (-288)
563 function old new delta
564 crc32_wd_buf - 56 +56
565 do_fat_read_at 2872 2904 +32
567 do_mem_crc 168 68 -100
568 hash_command 420 160 -260
569 tec : all -449 bss -4 data -16 rodata -93 text -336
570 u-boot: add: 1/-1, grow: 1/-2 bytes: 88/-376 (-288)
571 function old new delta
572 crc32_wd_buf - 56 +56
573 do_fat_read_at 2872 2904 +32
575 do_mem_crc 168 68 -100
576 hash_command 420 160 -260
577 plutux : all -481 bss +16 data -16 rodata -93 text -388
578 u-boot: add: 1/-1, grow: 1/-3 bytes: 68/-408 (-340)
579 function old new delta
580 crc32_wd_buf - 56 +56
581 do_load_serial_bin 1688 1700 +12
583 do_fat_read_at 2904 2872 -32
584 do_mem_crc 168 68 -100
585 hash_command 420 160 -260
586 powerpc: (for 5/5 boards) all +37.4 data -3.2 rodata -41.8 text +82.4
587 MPC8610HPCD : all +55 rodata -29 text +84
588 u-boot: add: 1/0, grow: 0/-1 bytes: 176/-96 (80)
589 function old new delta
590 hash_command - 176 +176
591 do_mem_crc 184 88 -96
592 MPC8641HPCN : all +55 rodata -29 text +84
593 u-boot: add: 1/0, grow: 0/-1 bytes: 176/-96 (80)
594 function old new delta
595 hash_command - 176 +176
596 do_mem_crc 184 88 -96
597 MPC8641HPCN_36BIT: all +55 rodata -29 text +84
598 u-boot: add: 1/0, grow: 0/-1 bytes: 176/-96 (80)
599 function old new delta
600 hash_command - 176 +176
601 do_mem_crc 184 88 -96
602 sbc8641d : all +55 rodata -29 text +84
603 u-boot: add: 1/0, grow: 0/-1 bytes: 176/-96 (80)
604 function old new delta
605 hash_command - 176 +176
606 do_mem_crc 184 88 -96
607 xpedite517x : all -33 data -16 rodata -93 text +76
608 u-boot: add: 1/-1, grow: 0/-1 bytes: 176/-112 (64)
609 function old new delta
610 hash_command - 176 +176
612 do_mem_crc 184 88 -96
616 This shows that commit 19 has increased text size for arm (although only one
617 board was built) and by 96 bytes for powerpc. This increase was offset in both
618 cases by reductions in rodata and data/bss.
620 Shown below the summary lines is the sizes for each board. Below each board
621 is the sizes for each function. This information starts with:
623 add - number of functions added / removed
624 grow - number of functions which grew / shrunk
625 bytes - number of bytes of code added to / removed from all functions,
626 plus the total byte change in brackets
628 The change seems to be that hash_command() has increased by more than the
629 do_mem_crc() function has decreased. The function sizes typically add up to
630 roughly the text area size, but note that every read-only section except
631 rodata is included in 'text', so the function total does not exactly
634 It is common when refactoring code for the rodata to decrease as the text size
635 increases, and vice versa.
638 Providing 'make' flags
639 ======================
641 U-Boot's build system supports a few flags (such as BUILD_TAG) which affect
642 the build product. These flags can be specified in the buildman settings
643 file. They can also be useful when building U-Boot against other open source
647 at91-boards=ENABLE_AT91_TEST=1
648 snapper9260=${at91-boards} BUILD_TAG=442
649 snapper9g45=${at91-boards} BUILD_TAG=443
651 This will use 'make ENABLE_AT91_TEST=1 BUILD_TAG=442' for snapper9260
652 and 'make ENABLE_AT91_TEST=1 BUILD_TAG=443' for snapper9g45. A special
653 variable ${target} is available to access the target name (snapper9260 and
654 snapper9g20 in this case). Variables are resolved recursively.
656 It is expected that any variables added are dealt with in U-Boot's
657 config.mk file and documented in the README.
663 Buildman has various other command line options. Try --help to see them.
669 This has mostly be written in my spare time as a response to my difficulties
670 in testing large series of patches. Apart from tidying up there is quite a
671 bit of scope for improvement. Things like better error diffs, easier access
672 to log files, error display while building. Also it would be nice it buildman
673 could 'hunt' for problems, perhaps by building a few boards for each arch,
674 or checking commits for changed files and building only boards which use
681 Thanks to Grant Grundler <grundler@chromium.org> for his ideas for improving
682 the build speed by building all commits for a board instead of the other