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dev-manual, ref-manual, yocto-project-qs: Updates to parallelism variables

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The way the old manual set had worded the use of the
BB_NUMBER_THREADS, PARALLEL_MAKE, and BB_NUMBER_PARSE_THREADS
had become depricated.  It suggested a lot of user intervention
to get these variables set to have the build system utilize
optimal parallelism.  The change a while back to the build system
where the variables are set to the number of build host cores
now makes the variables automatically be set to their best
values.  I have gone through the manual set and changed wordings
appropriately to reflect this.

Reported-by: Robert P. J. Day <rpjday@crashcourse.ca>
(From yocto-docs rev: 3a27b1792c92a2f22173315e2732f672cdad2c78)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Scott Rifenbark
2015-01-19 14:14:19 -08:00
committed by Richard Purdie
parent 0a367c514b
commit 4ab132a20d
5 changed files with 33 additions and 50 deletions
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documentation/dev-manual/dev-manual-start.xml
+3 -4
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@@ -297,10 +297,9 @@
This file defines many aspects of the build environment including
the target machine architecture through the
<filename><ulink url='&YOCTO_DOCS_REF_URL;#var-MACHINE'>MACHINE</ulink></filename> variable,
the development machine's processor use through the
<filename><ulink url='&YOCTO_DOCS_REF_URL;#var-BB_NUMBER_THREADS'>BB_NUMBER_THREADS</ulink></filename> and
<filename><ulink url='&YOCTO_DOCS_REF_URL;#var-PARALLEL_MAKE'>PARALLEL_MAKE</ulink></filename> variables, and
a centralized tarball download directory through the
the packaging format used during the build
(<ulink url='&YOCTO_DOCS_REF_URL;#var-PACKAGE_CLASSES'><filename>PACKAGE_CLASSES</filename></ulink>),
and a centralized tarball download directory through the
<filename><ulink url='&YOCTO_DOCS_REF_URL;#var-DL_DIR'>DL_DIR</ulink></filename> variable.</para></listitem>
<listitem><para>
Build the image using the <filename>bitbake</filename> command.