On Tue, Oct 9, 2012 at 5:31 PM, Patrick Turley
<patricktur...@gamestop.com> wrote:
> Success. The file tree depicted at the bottom of this mail is nearly the
> smallest, valid BitBake project that prints "Hello, World!" Here's the
> output:
Perhaps you could push this to github somewhere as an example?
-M
>
>
> $ ../BitBake/bin/bitbake a
> Parsing recipes: 100%
> |#############################################################| Time:
> 00:00:00
> Parsing of 1 .bb files complete (0 cached, 1 parsed). 1 targets, 0
> skipped, 0 masked, 0 errors.
> NOTE: Resolving any missing task queue dependencies
> NOTE: Preparing runqueue
> NOTE: Executing RunQueue Tasks
> NOTE: Running task 1 of 1 (ID: 0,
> /home/pturley/Workspace/Hello/LayerA/a.bb, do_build)
> NOTE: package None: task do_build: Started
> Hello, World!
> NOTE: package None: task do_build: Succeeded
> NOTE: Tasks Summary: Attempted 1 tasks of which 0 didn't need to be
> rerun and all succeeded.
>
>
> A few things to note:
>
> 1) This is not the *smallest* such BitBake project. For example, the
> "DESCRIPTION" and "PV" variables need not be assigned in "a.bb". I set those
> variables because I wanted "show-layers" and "show-recipes" to display
> reasonable information.
>
> 2) Some of the variables set in "bitbake.conf" have "simplified" values. For
> example, you would *not* want to use these values if there were multiple
> recipes and you had to disambiguate the output from each of them.
>
> 3) On the other hand, *all* the variable assignments in "bitbake.conf" are
> *essential* to BitBake itself. If you remove any one of those assignments,
> BitBake will either declare an error or die (usually because some internal
> variable is set to "None" and the BitBake code can't handle it).
>
>
> ------------------------------------------------------------
>
>
> ├── build
> │ │
> │ ├── classes
> │ │ │
> │ │ └── base.bbclass
> │ │
> │ │ +-----------------------------------------------
> │ │ | addtask build
> │ │ +-----------------------------------------------
> │ │
> │ └── conf
> │ │
> │ ├── bblayers.conf
> │ │
> │ │ +-----------------------------------------------
> │ │ | BBLAYERS ?= " \
> │ │ | /home/pturley/Workspace/Hello/LayerA \
> │ │ | "
> │ │ +-----------------------------------------------
> │ │
> │ └── bitbake.conf
> │
> │ +-----------------------------------------------
> │ | TMPDIR = "${TOPDIR}/tmp"
> │ | CACHE = "${TMPDIR}/cache"
> │ | STAMP = "${TMPDIR}/stamps"
> │ | T = "${TMPDIR}/work"
> │ | B = "${TMPDIR}"
> │ +-----------------------------------------------
> │
> ├── LayerA
> │ │
> │ ├── a.bb
> │ │
> │ │ +-----------------------------------------------
> │ │ | DESCRIPTION = "Layer A Recipe"
> │ │ | PN = 'a'
> │ │ | PV = '1'
> │ │ |
> │ │ | python do_build() {
> │ │ | bb.plain("Hello, World!");
> │ │ | }
> │ │ +-----------------------------------------------
> │ │
> │ └── conf
> │ │
> │ └── layer.conf
> │
> │ +-----------------------------------------------
> │ | BBPATH .= ":${LAYERDIR}"
> │ |
> │ | BBFILES += "${LAYERDIR}/*.bb"
> │ |
> │ | BBFILE_COLLECTIONS += "A"
> │ | BBFILE_PATTERN_A := "^${LAYERDIR}/"
> │ +-----------------------------------------------
> │
> └── BitBake
>
> The BitBake directory origin is:
>
> http://git.openembedded.org/bitbake/
>
> I have the 1.15.2 tag checked out, which is what
> Yocto denzil uses.
>
>
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> yocto@yoctoproject.org
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>
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