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

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>

1 files changed, 3 insertions, 4 deletions

diff --git a/documentation/dev-manual/dev-manual-start.xml b/documentation/dev-manual/dev-manual-start.xml
index df29302fdb..c3206b86f8 100644
--- a/documentation/dev-manual/dev-manual-start.xml
+++ b/documentation/dev-manual/dev-manual-start.xml
@@ -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.