ref-manual, dev-manual: Added references to SYSROOT_DIRS

Fixes [YOCTO #10692]

I updated the STAGING_DIR variable description to have a reference
to the SYSROOT_DIRS variable as well as the "Sharing Files
Between Recipes" section of the dev-manual.

I also updated the "Sharing Files Between Recipes" section so
that the role of SYSROOT_DIRS is explained and actually used
in an example to add another directory.

(From yocto-docs rev: 23114b4bc708398bae8c4559793dd36bc53c96a2)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 14 insertions, 1 deletions

diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 9d6fab0c94..af1ed8408b 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -12692,9 +12692,22 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
                     Specifies the path to the top-level sysroots directory
                     (i.e.
                     <filename>${</filename><link linkend='var-TMPDIR'><filename>TMPDIR</filename></link><filename>}/sysroots</filename>).
+                </para>
+
+                <para>
+                    <filename>STAGING_DIR</filename> contains the directories
+                    that are staged into the sysroot by the
+                    <link linkend='ref-tasks-populate_sysroot'><filename>do_populate_sysroot</filename></link>
+                    task.
+                    See the
+                    <link linkend='var-SYSROOT_DIRS'><filename>SYSROOT_DIRS</filename></link>
+                    variable and the
+                    "<ulink url='&YOCTO_DOCS_DEV_URL;#new-sharing-files-between-recipes'>Sharing Files Between Recipes</ulink>"
+                    section for more information.
                     <note>
                         Recipes should never write files directly under
-                        this directory because the OpenEmbedded build system
+                        the <filename>STAGING_DIR</filename> directory because
+                        the OpenEmbedded build system
                         manages the directory automatically.
                         Instead, files should be installed to
                         <filename>${</filename><link linkend='var-D'><filename>D</filename></link><filename>}</filename>