summaryrefslogtreecommitdiffstats
path: root/yocto-poky/documentation/ref-manual/ref-tasks.xml
blob: c46debb55be32864d8755e412e521586a07c5fa2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
[<!ENTITY % poky SYSTEM "../poky.ent"> %poky; ] >

<chapter id='ref-tasks'>
<title>Tasks</title>

<para>
    Tasks are units of execution for BitBake.
    Recipes (<filename>.bb</filename> files) use tasks to complete
    configuring, compiling, and packaging software.
    This chapter provides a reference of the tasks defined in the
    OpenEmbedded build system.
</para>

<section id='normal-recipe-build-tasks'>
    <title>Normal Recipe Build Tasks</title>

    <para>
        The following sections describe normal tasks associated with building
        a recipe.
    </para>

    <section id='ref-tasks-build'>
        <title><filename>do_build</filename></title>

        <para>
            The default task for all recipes.
            This task depends on all other normal tasks
            required to build a recipe.
        </para>
    </section>

    <section id='ref-tasks-checkpkg'>
        <title><filename>do_checkpkg</filename></title>

        <para>
            Provides information about the recipe including its upstream
            version and status.
            The upstream version and status reveals whether or not a version
            of the recipe exists upstream and a status of not updated, updated,
            or unknown.
        </para>

        <para>
            The <filename>checkpkg</filename> task is included as part of the
            <link linkend='ref-classes-distrodata'><filename>distrodata</filename></link>
            class.
        </para>

        <para>
            To build the <filename>checkpkg</filename> task, use the
            <filename>bitbake</filename> command with the "-c" option and
            task name:
            <literallayout class='monospaced'>
     $ bitbake core-image-minimal -c checkpkg
            </literallayout>
            By default, the results are stored in
            <link linkend='var-LOG_DIR'><filename>$LOG_DIR</filename></link>
            (e.g. <filename>$BUILD_DIR/tmp/log</filename>).
        </para>
    </section>

    <section id='ref-tasks-compile'>
        <title><filename>do_compile</filename></title>

        <para>
            Compiles the source in the compilation directory, which is pointed
            to by the
            <link linkend='var-B'><filename>B</filename></link> variable.
        </para>
    </section>

    <section id='ref-tasks-compile_ptest_base'>
        <title><filename>do_compile_ptest_base</filename></title>

        <para>
            Compiles the runtime test suite included in the software being
            built.
        </para>
    </section>

    <section id='ref-tasks-configure'>
        <title><filename>do_configure</filename></title>

        <para>
            Configures the source by enabling and disabling any build-time and
            configuration options for the software being built.
        </para>
    </section>

    <section id='ref-tasks-configure_ptest_base'>
        <title><filename>do_configure_ptest_base</filename></title>

        <para>
            Configures the runtime test suite included in the software being
            built.
        </para>
    </section>

    <section id='ref-tasks-deploy'>
        <title><filename>do_deploy</filename></title>

        <para>
            Writes output files that are to be deployed to the deploy
            directory, which is defined by the
            <link linkend='var-DEPLOYDIR'><filename>DEPLOYDIR</filename></link>
            variable.
        </para>

        <para>
            The <filename>do_deploy</filename> task is a
            shared state (sstate) task, which means that the task can
            be accelerated through sstate use.
            Realize also that if the task is re-executed, any previous output
            is removed (i.e. "cleaned").
        </para>
    </section>

    <section id='ref-tasks-distrodata'>
        <title><filename>do_distrodata</filename></title>

        <para>
            Provides information about the recipe.
        </para>

        <para>
            The <filename>distrodata</filename> task is included as part of the
            <link linkend='ref-classes-distrodata'><filename>distrodata</filename></link>
            class.
        </para>

        <para>
            To build the <filename>distrodata</filename> task, use the
            <filename>bitbake</filename> command with the "-c" option and
            task name:
            <literallayout class='monospaced'>
     $ bitbake core-image-minimal -c distrodata
            </literallayout>
            By default, the results are stored in
            <link linkend='var-LOG_DIR'><filename>$LOG_DIR</filename></link>
            (e.g. <filename>$BUILD_DIR/tmp/log</filename>).
        </para>
    </section>

    <section id='ref-tasks-fetch'>
        <title><filename>do_fetch</filename></title>

        <para>
            Fetches the source code.
            This task uses the
            <link linkend='var-SRC_URI'><filename>SRC_URI</filename></link>
            variable and the argument's prefix to determine the correct
            fetcher module.
        </para>
    </section>

    <section id='ref-tasks-image'>
        <title><filename>do_image</filename></title>

        <para>
            Starts the image generation process.
            The <filename>do_image</filename> task runs after the
            OpenEmbedded build system has run the
            <link linkend='ref-tasks-rootfs'><filename>do_rootfs</filename></link>
            task during which packages are identified for installation into
            the image and the root filesystem is created, complete with
            post-processing.
        </para>

        <para>
            The <filename>do_image</filename> task performs pre-processing
            on the image through the
            <link linkend='var-IMAGE_PREPROCESS_COMMAND'><filename>IMAGE_PREPROCESS_COMMAND</filename></link>
            and dynamically generates supporting
            <filename>do_image_*</filename> tasks as needed.
        </para>

        <para>
            For more information on image creation, see the
            "<link linkend='image-generation-dev-environment'>Image Generation</link>"
            section.
        </para>
    </section>

    <section id='ref-tasks-image-complete'>
        <title><filename>do_image_complete</filename></title>

        <para>
            Completes the image generation process.
            The <filename>do_image_complete</filename> task runs after the
            OpenEmbedded build system has run the
            <link linkend='ref-tasks-rootfs'><filename>do_image</filename></link>
            task during which image pre-processing occurs and through
            dynamically generated <filename>do_image_*</filename> tasks the
            image is constructed.
        </para>

        <para>
            The <filename>do_image_complete</filename> task performs
            post-processing on the image through the
            <link linkend='var-IMAGE_POSTPROCESS_COMMAND'><filename>IMAGE_POSTPROCESS_COMMAND</filename></link>.
        </para>

        <para>
            For more information on image creation, see the
            "<link linkend='image-generation-dev-environment'>Image Generation</link>"
            section.
        </para>
    </section>

    <section id='ref-tasks-install'>
        <title><filename>do_install</filename></title>

        <para>
            Copies files from the compilation directory, which is defined by
            the
            <link linkend='var-B'><filename>B</filename></link> variable,
            to a holding area defined by the
            <link linkend='var-D'><filename>D</filename></link> variable.
        </para>
    </section>

    <section id='ref-tasks-install_ptest_base'>
        <title><filename>do_install_ptest_base</filename></title>

        <para>
            Copies the runtime test suite files from the compilation directory
            to a holding area.
        </para>
    </section>

    <section id='ref-tasks-package'>
        <title><filename>do_package</filename></title>

        <para>
            Analyzes the content of the holding area and splits it into subsets
            based on available packages and files.
        </para>
    </section>

    <section id='ref-tasks-package_qa'>
        <title><filename>do_package_qa</filename></title>

        <para>
            Runs QA checks on packaged files.
            For more information on these checks, see the
            <link linkend='ref-classes-insane'><filename>insane</filename></link>
            class.
        </para>
    </section>

    <section id='ref-tasks-package_write_deb'>
        <title><filename>do_package_write_deb</filename></title>

        <para>
            Creates Debian packages (i.e. <filename>*.deb</filename> files) and
            places them in the
            <filename>${</filename><link linkend='var-DEPLOY_DIR_DEB'><filename>DEPLOY_DIR_DEB</filename></link><filename>}</filename>
            directory in the package feeds area.
            For more information, see the
            "<link linkend='package-feeds-dev-environment'>Package Feeds</link>"
            section.
        </para>
    </section>

    <section id='ref-tasks-package_write_ipk'>
        <title><filename>do_package_write_ipk</filename></title>

        <para>
            Creates IPK packages (i.e. <filename>*.ipk</filename> files) and
            places them in the
            <filename>${</filename><link linkend='var-DEPLOY_DIR_IPK'><filename>DEPLOY_DIR_IPK</filename></link><filename>}</filename>
            directory in the package feeds area.
            For more information, see the
            "<link linkend='package-feeds-dev-environment'>Package Feeds</link>"
            section.
        </para>
    </section>

    <section id='ref-tasks-package_write_rpm'>
        <title><filename>do_package_write_rpm</filename></title>

        <para>
            Creates RPM packages (i.e. <filename>*.rpm</filename> files) and
            places them in the
            <filename>${</filename><link linkend='var-DEPLOY_DIR_RPM'><filename>DEPLOY_DIR_RPM</filename></link><filename>}</filename>
            directory in the package feeds area.
            For more information, see the
            "<link linkend='package-feeds-dev-environment'>Package Feeds</link>"
            section.
        </para>
    </section>

    <section id='ref-tasks-package_write_tar'>
        <title><filename>do_package_write_tar</filename></title>

        <para>
            Creates tarballs and places them in the
            <filename>${</filename><link linkend='var-DEPLOY_DIR_TAR'><filename>DEPLOY_DIR_TAR</filename></link><filename>}</filename>
            directory in the package feeds area.
            For more information, see the
            "<link linkend='package-feeds-dev-environment'>Package Feeds</link>"
            section.
        </para>
    </section>

    <section id='ref-tasks-packagedata'>
        <title><filename>do_packagedata</filename></title>

        <para>
            Creates package metadata used by the build system to generate the
            final packages.
        </para>
    </section>

    <section id='ref-tasks-patch'>
        <title><filename>do_patch</filename></title>

        <para>
            Locates patch files and applies them to the source code.
            See the
            "<link linkend='patching-dev-environment'>Patching</link>"
            section for more information.
        </para>
    </section>

    <section id='ref-tasks-populate_lic'>
        <title><filename>do_populate_lic</filename></title>

        <para>
            Writes license information for the recipe that is collected later
            when the image is constructed.
        </para>
    </section>

    <section id='ref-tasks-populate_sdk'>
        <title><filename>do_populate_sdk</filename></title>

        <para>
            Creates the file and directory structure for an installable SDK.
            See the
            "<link linkend='sdk-generation-dev-environment'>SDK Generation</link>"
            section for more information.
        </para>
    </section>

    <section id='ref-tasks-populate_sysroot'>
        <title><filename>do_populate_sysroot</filename></title>

        <para>
            Copies a subset of the files installed by the
            <link linkend='ref-tasks-install'><filename>do_install</filename></link>
            task into the sysroot to make them available to other recipes.
            Files that would typically not be needed by other recipes at build
            time are skipped.
            Skipped files include files installed into
            <filename>/etc.</filename>
            For information on what files are copied, see the
            <link linkend='ref-classes-staging'><filename>staging</filename></link>
            class.
        </para>

        <para>
            The <filename>do_populate_sysroot</filename> task is a
            shared state (sstate) task, which means that the task can
            be accelerated through sstate use.
            Realize also that if the task is re-executed, any previous output
            is removed (i.e. "cleaned").
        </para>
    </section>

    <section id='ref-tasks-rm_work'>
        <title><filename>do_rm_work</filename></title>

        <para>
            Removes work files after the OpenEmbedded build system has
            finished with them.
            You can learn more by looking at the
            "<link linkend='ref-classes-rm-work'><filename>rm_work.bbclass</filename></link>"
            section.
        </para>
    </section>

    <section id='ref-tasks-rm_work_all'>
        <title><filename>do_rm_work_all</filename></title>

        <para>
            Top-level task for removing work files after the build system has
            finished with them.
        </para>
    </section>

    <section id='ref-tasks-unpack'>
        <title><filename>do_unpack</filename></title>

        <para>
            Unpacks the source code into a working directory pointed to
            by
            <filename>${</filename><link linkend='var-WORKDIR'><filename>WORKDIR</filename></link><filename>}</filename>.
            The
            <link linkend='var-S'><filename>S</filename></link> variable also
            plays a role in where unpacked source files ultimately reside.
            For more information on how source files are unpacked, see the
            "<link linkend='source-fetching-dev-environment'>Source Fetching</link>"
            section and the <filename>WORKDIR</filename> and
            <filename>S</filename> variable descriptions.
        </para>
    </section>
</section>

<section id='manually-called-tasks'>
    <title>Manually Called Tasks</title>

    <para>
        These tasks are typically manually triggered (e.g. by using the
        <filename>bitbake -c</filename> command-line option):
    </para>

    <section id='ref-tasks-checkuri'>
        <title><filename>do_checkuri</filename></title>

        <para>
            Validates the
            <link linkend='var-SRC_URI'><filename>SRC_URI</filename></link>
            value.
        </para>
    </section>

    <section id='ref-tasks-checkuriall'>
        <title><filename>do_checkuriall</filename></title>

        <para>
            Validates the
            <link linkend='var-SRC_URI'><filename>SRC_URI</filename></link>
            value for all recipes required to build a target.
        </para>
    </section>

    <section id='ref-tasks-clean'>
        <title><filename>do_clean</filename></title>

        <para>
            Removes all output files for a target from the
            <link linkend='ref-tasks-unpack'><filename>do_unpack</filename></link>
            task forward (i.e.
            <link linkend='ref-tasks-patch'><filename>do_unpack</filename></link>,
            <link linkend='ref-tasks-configure'><filename>do_configure</filename></link>,
            <link linkend='ref-tasks-compile'><filename>do_compile</filename></link>,
            <link linkend='ref-tasks-install'><filename>do_install</filename></link>,
            and
            <link linkend='ref-tasks-package'><filename>do_package</filename></link>).
        </para>

        <para>
            You can run this task using BitBake as follows:
            <literallayout class='monospaced'>
     $ bitbake -c clean <replaceable>recipe</replaceable>
            </literallayout>
        </para>

        <para>
            Running this task does not remove the
            <link linkend='shared-state-cache'>sstate</link>) cache
            files.
            Consequently, if no changes have been made and the recipe is
            rebuilt after cleaning, output files are simply restored from the
            sstate cache.
            If you want to remove the sstate cache files for the recipe,
            you need to use the
            <link linkend='ref-tasks-cleansstate'><filename>do_cleansstate</filename></link>
            task instead (i.e. <filename>bitbake -c cleansstate</filename> <replaceable>recipe</replaceable>).
        </para>
    </section>

    <section id='ref-tasks-cleanall'>
        <title><filename>do_cleanall</filename></title>

        <para>
            Removes all output files, shared state
            (<link linkend='shared-state-cache'>sstate</link>) cache, and
            downloaded source files for a target (i.e. the contents of
            <link linkend='var-DL_DIR'><filename>DL_DIR</filename></link>).
            Essentially, the <filename>do_cleanall</filename> task is
            identical to the
            <link linkend='ref-tasks-cleansstate'><filename>do_cleansstate</filename></link>
            task with the added removal of downloaded source files.
        </para>

        <para>
            You can run this task using BitBake as follows:
            <literallayout class='monospaced'>
     $ bitbake -c cleanall <replaceable>recipe</replaceable>
            </literallayout>
        </para>

        <para>
            Typically, you would not normally use the
            <filename>cleanall</filename> task.
            Do so only if you want to start fresh with the
            <link linkend='ref-tasks-fetch'><filename>do_fetch</filename></link>
            task.
        </para>
    </section>

    <section id='ref-tasks-cleansstate'>
        <title><filename>do_cleansstate</filename></title>

        <para>
            Removes all output files and shared state
            (<link linkend='shared-state-cache'>sstate</link>)
            cache for a target.
            Essentially, the <filename>do_cleansstate</filename> task is
            identical to the
            <link linkend='ref-tasks-clean'><filename>do_clean</filename></link>
            task with the added removal of shared state
            (<link linkend='shared-state-cache'>sstate</link>) cache.
        </para>

        <para>
            You can run this task using BitBake as follows:
            <literallayout class='monospaced'>
     $ bitbake -c cleansstate <replaceable>recipe</replaceable>
            </literallayout>
        </para>

        <para>
            When you run the <filename>do_cleansstate</filename> task,
            the OpenEmbedded build system no longer uses any
            sstate.
            Consequently, building the recipe from scratch is guaranteed.
            <note>
                The <filename>do_cleansstate</filename> task cannot remove
                sstate from a remote sstate mirror.
                If you need to build a target from scratch using remote
                mirrors, use the "-f" option as follows:
                <literallayout class='monospaced'>
     $ bitbake -f -c do_cleansstate <replaceable>target</replaceable>
                </literallayout>
            </note>
        </para>
     </section>

    <section id='ref-tasks-devshell'>
        <title><filename>do_devshell</filename></title>

        <para>
            Starts a shell whose environment is set up for
            development, debugging, or both.
            See the
            "<ulink url='&YOCTO_DOCS_DEV_URL;#platdev-appdev-devshell'>Using a Development Shell</ulink>"
            section in the Yocto Project Development Manual for more
            information about using <filename>devshell</filename>.
        </para>
    </section>

    <section id='ref-tasks-fetchall'>
        <title><filename>do_fetchall</filename></title>

        <para>
            Fetches all remote sources required to build a target.
        </para>
    </section>

    <section id='ref-tasks-listtasks'>
        <title><filename>do_listtasks</filename></title>

        <para>
            Lists all defined tasks for a target.
        </para>
    </section>

    <section id='ref-tasks-package_index'>
        <title><filename>do_package_index</filename></title>

        <para>
            Creates or updates the index in the
            <link linkend='package-feeds-dev-environment'>Package Feeds</link>
            area.
            <note>
                This task is not triggered with the
                <filename>bitbake -c</filename> command-line option as
                are the other tasks in this section.
                Because this task is specifically for the
                <filename>package-index</filename> recipe,
                you run it using
                <filename>bitbake package-index</filename>.
            </note>
        </para>
    </section>
</section>

<section id='image-related-tasks'>
    <title>Image-Related Tasks</title>

    <para>
        The following tasks are applicable to image recipes.
    </para>

    <section id='ref-tasks-bootimg'>
        <title><filename>do_bootimg</filename></title>

        <para>
            Creates a bootable live image.
            See the
            <link linkend='var-IMAGE_FSTYPES'><filename>IMAGE_FSTYPES</filename></link>
            variable for additional information on live image types.
        </para>
    </section>

    <section id='ref-tasks-bundle_initramfs'>
        <title><filename>do_bundle_initramfs</filename></title>

        <para>
            Combines an initial RAM disk (initramfs) image and kernel
            together to form a single image.
            The
            <link linkend='var-CONFIG_INITRAMFS_SOURCE'><filename>CONFIG_INITRAMFS_SOURCE</filename></link>
            variable has some more information about these types of images.
        </para>
    </section>

    <section id='ref-tasks-rootfs'>
        <title><filename>do_rootfs</filename></title>

        <para>
            Creates the root filesystem (file and directory structure) for an
            image.
            See the
            "<link linkend='image-generation-dev-environment'>Image Generation</link>"
            section for more information on how the root filesystem is created.
        </para>
    </section>

    <section id='ref-tasks-testimage'>
        <title><filename>do_testimage</filename></title>

        <para>
            Boots an image and performs runtime tests within the image.
            For information on automatically testing images, see the
            "<ulink url='&YOCTO_DOCS_DEV_URL;#performing-automated-runtime-testing'>Performing Automated Runtime Testing</ulink>"
            section in the Yocto Project Development Manual.
        </para>
    </section>

    <section id='ref-tasks-testimage_auto'>
        <title><filename>do_testimage_auto</filename></title>

        <para>
            Boots an image and performs runtime tests within the image
            immediately after it has been built.
            This task is enabled when you set
            <link linkend='var-TEST_IMAGE'><filename>TEST_IMAGE</filename></link>
            equal to "1".
        </para>

        <para>
            For information on automatically testing images, see the
            "<ulink url='&YOCTO_DOCS_DEV_URL;#performing-automated-runtime-testing'>Performing Automated Runtime Testing</ulink>"
            section in the Yocto Project Development Manual.
        </para>
    </section>

    <section id='ref-tasks-vmdkimg'>
        <title><filename>do_vmdkimg</filename></title>

        <para>
            Creates a <filename>.vmdk</filename> image for use with
            <ulink url='http://www.vmware.com/'>VMware</ulink>
            and compatible virtual machine hosts.
        </para>
    </section>
</section>

<section id='kernel-related-tasks'>
    <title>Kernel-Related Tasks</title>

    <para>
        The following tasks are applicable to kernel recipes.
        Some of these tasks (e.g. the
        <link linkend='ref-tasks-menuconfig'><filename>do_menuconfig</filename></link>
        task) are also applicable to recipes that use
        Linux kernel style configuration such as the BusyBox recipe.
    </para>

    <section id='ref-tasks-compile_kernelmodules'>
        <title><filename>do_compile_kernelmodules</filename></title>

        <para>
            Compiles loadable modules for the Linux kernel.
        </para>
    </section>

    <section id='ref-tasks-diffconfig'>
        <title><filename>do_diffconfig</filename></title>

        <para>
            Compares the old and new config files after running the
            <link linkend='ref-tasks-menuconfig'><filename>do_menuconfig</filename></link>
            task for the kernel.
        </para>
    </section>

    <section id='ref-tasks-kernel_checkout'>
        <title><filename>do_kernel_checkout</filename></title>

        <para>
            Checks out source/meta branches for a linux-yocto style kernel.
        </para>
    </section>

    <section id='ref-tasks-kernel_configcheck'>
        <title><filename>do_kernel_configcheck</filename></title>

        <para>
            Validates the kernel configuration for a linux-yocto style kernel.
        </para>
    </section>

    <section id='ref-tasks-kernel_configme'>
        <title><filename>do_kernel_configme</filename></title>

        <para>
            Assembles the kernel configuration for a linux-yocto style kernel.
        </para>
    </section>

    <section id='ref-tasks-kernel_link_vmlinux'>
        <title><filename>do_kernel_link_vmlinux</filename></title>

        <para>
            Creates a symbolic link in
            <filename>arch/$arch/boot</filename> for vmlinux kernel
            images.
        </para>
    </section>

    <section id='ref-tasks-kernel_metadata'>
        <title><filename>do_kernel_metadata</filename></title>

        <para>
            Collects kernel metadata for a
            <filename>linux-yocto</filename> style kernel.
        </para>
    </section>

    <section id='ref-tasks-menuconfig'>
        <title><filename>do_menuconfig</filename></title>

        <para>
            Runs <filename>make menuconfig</filename> for the kernel.
            For information on <filename>menuconfig</filename>, see the
            "<ulink url='&YOCTO_DOCS_DEV_URL;#using-menuconfig'>Using&nbsp;&nbsp;<filename>menuconfig</filename></ulink>"
            section in the Yocto Project Development Manual.
        </para>
    </section>

    <section id='ref-tasks-savedefconfig'>
        <title><filename>do_savedefconfig</filename></title>

        <para>
            Creates a minimal Linux kernel configuration file.
        </para>
    </section>

    <section id='ref-tasks-shared_workdir'>
        <title><filename>do_shared_workdir</filename></title>

        <para>
            Creates the shared working directory for the kernel.
        </para>
    </section>

    <section id='ref-tasks-sizecheck'>
        <title><filename>do_sizecheck</filename></title>

        <para>
            Checks the size of the kernel image against
            <link linkend='var-KERNEL_IMAGE_MAXSIZE'><filename>KERNEL_IMAGE_MAXSIZE</filename></link>
            when set.
        </para>
    </section>

    <section id='ref-tasks-strip'>
        <title><filename>do_strip</filename></title>

        <para>
            Strips unneeded sections out of the Linux kernel image.
        </para>
    </section>

    <section id='ref-tasks-uboot_mkimage'>
        <title><filename>do_uboot_mkimage</filename></title>

        <para>
            Creates a uImage file from the kernel for the U-Boot bootloader.
        </para>
    </section>

    <section id='ref-tasks-validate_branches'>
        <title><filename>do_validate_branches</filename></title>

        <para>
            Ensures that the source, metadata (or both) branches are on the
            locations specified by their
            <link linkend='var-SRCREV'><filename>SRCREV</filename></link>
            values for a linux-yocto style kernel.
        </para>
    </section>
</section>

<section id='miscellaneous-tasks'>
    <title>Miscellaneous Tasks</title>

    <para>
        The following sections describe miscellaneous tasks.
    </para>

    <section id='ref-tasks-spdx'>
        <title><filename>do_spdx</filename></title>

        <para>
            A build stage that takes the source code and scans it on a remote
            FOSSOLOGY server in order to produce an SPDX document.
            This task applies only to the
            <link linkend='ref-classes-spdx'><filename>spdx</filename></link>
            class.
        </para>
    </section>
</section>

</chapter>
<!--
vim: expandtab tw=80 ts=4
-->
OpenPOWER on IntegriCloud