yocto-project-qs, ref-manual: Fixed core number defaults

Fixes [YOCTO #2528]

The defaults for BB_NUMBER_THREADS and PARALLEL_MAKE are now
automatically set to the build host's number of processor cores.
I updated the "Building and Image" section in the Quick Start
to state that.  I also updated the PARALLEL_MAKE variable.

(From yocto-docs rev: 2069c96d2410605c089da4eede2c7b4f9a7b704a)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 3 insertions, 4 deletions

diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 8e4f1793bb..a0f53713b0 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -5132,10 +5132,9 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
                     command during the <filename>do_compile</filename> task
                     in order to specify parallel compilation on the local
                     build host.
-                    This variable is usually in the form
-                    <filename>-j 4</filename>, where the number
-                    represents the maximum number of parallel threads make can
-                    run.
+                    This variable is usually in the form "-j &lt;x&gt;",
+                    where x represents the maximum number of parallel threads
+                    <filename>make</filename> can run.
                 </para>
 
                 <para>