documentation/poky-ref-manual/ref-variables.xml: new BBMASK glossary entry
Added a glossary entry for BBMASK. Fixes [YOCTO #1935] Reported by: Gary Thomas <gary@mlbassoc.com> (From yocto-docs rev: 4406a8b0b85ac15070e2ccb1c57ef9801827a7f7) Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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</glossdef>
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</glossentry>
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<glossentry id='var-BBMASK'><glossterm>BBMASK</glossterm>
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<glossdef>
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<para>Prevents BitBake from processing recipes and recipe append files.
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You can use the <filename>BBMASK</filename> variable to "hide"
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these <filename>.bb</filename> and <filename>.bbappend</filename> files.
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BitBake ignores any recipe or recipe append files that match the expression.
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It is as if BitBake does not see them at all.
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Consequently, matching files are not parsed or otherwise used by
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BitBake.</para>
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<para>The value you provide is passed to python's regular expression compiler.
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For complete syntax information, see python's documentation at
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<ulink url='http://docs.python.org/release/2.3/lib/re-syntax.html'></ulink>.
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The expression is compared against the full paths to the files.
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For example, the following uses a complete regular expression to tell
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BitBake to ignore all recipe and recipe append files in the
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<filename>.*/meta-ti/recipes-misc/</filename> directory:
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<literallayout class='monospaced'>
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BBMASK = ".*/meta-ti/recipes-misc/"
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</literallayout></para>
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<para>Use the <filename>BBMASK</filename> variable from within the
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<filename>conf/local.conf</filename> file found
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in the Yocto Project build directory.</para>
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</glossdef>
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</glossentry>
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<glossentry id='var-BB_NUMBER_THREADS'><glossterm>BB_NUMBER_THREADS</glossterm>
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<glossdef>
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<para>The maximum number of tasks BitBake should run in parallel at any one time.
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