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dev-manual: Updates to section on multiconfig builds

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* Added qualifying text indicating that you can build images or
packages.  In other words, the multiconfig does not necessarily
have to be an image.  It can be a package as well.

* Added qualifying text describing that it is not a requirement
to have separate TMPDIRs for each multiconfig.  I used a build
for two multiconfigs of "qemux86" for different DISTROs as
a case.

(From yocto-docs rev: 6e5ed0d1ab305c3382fea55fc1a2deaac0b7d518)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Scott Rifenbark
2018-08-27 09:14:42 -07:00
committed by Richard Purdie
parent 2d3a811338
commit accd9e7b62
1 changed files with 15 additions and 5 deletions
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documentation/dev-manual/dev-manual-common-tasks.xml
+15 -5
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@@ -5326,9 +5326,9 @@
<para>
You can use a single <filename>bitbake</filename> command
to build multiple images for different targets where each
image requires a different configuration (multiple
configuration builds).
to build multiple images or packages for different targets
where each image or package requires a different configuration
(multiple configuration builds).
The builds, in this scenario, are sometimes referred to as
"multiconfigs", and this section uses that term throughout.
</para>
@@ -5363,8 +5363,18 @@
Minimally, each configuration file must define the
machine and the temporary directory BitBake uses
for the build.
You must not overlap the temporary directories
used during the build.</para>
Suggested practice dictates that you do not
overlap the temporary directories
used during the builds.
However, it is possible that you can share the
temporary directory
(<ulink url='&YOCTO_DOCS_REF_URL;#var-TMPDIR'><filename>TMPDIR</filename></ulink>).
For example, consider a scenario with two
different multiconfigs for the same
<ulink url='&YOCTO_DOCS_REF_URL;#var-MACHINE'><filename>MACHINE</filename></ulink>: "qemux86" built for
two distributions such as "poky" and "poky-lsb".
In this case, you might want to use the same
<filename>TMPDIR</filename>.</para>
<para>Here is an example showing the minimal
statements needed in a configuration file for