ref-manual: Inserted Migration 2.7 section.

(From yocto-docs rev: 238ddd62995420741c2b97ccfa7d2c533b72837c)

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

1 files changed, 224 insertions, 0 deletions

diff --git a/documentation/ref-manual/migration.xml b/documentation/ref-manual/migration.xml
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--- a/documentation/ref-manual/migration.xml
+++ b/documentation/ref-manual/migration.xml
@@ -6325,6 +6325,230 @@ id=f4d4f99cfbc2396e49c1613a7d237b9e57f06f81'>commit message</ulink>.
         </para>
     </section>
 </section>
+
+<section id='moving-to-the-yocto-project-2.7-release'>
+    <title>Moving to the Yocto Project 2.7 Release</title>
+
+    <para>
+        This section provides migration information for moving to the
+        Yocto Project 2.7 Release from the prior release.
+    </para>
+
+    <section id='migration-2.7-bitbake-changes'>
+        <title>BitBake Changes</title>
+
+        <para>
+            The following changes have been made to BitBake:
+            <itemizedlist>
+                <listitem><para>
+                    The BBHandler now checks tab indentation for Python code.
+                    </para></listitem>
+                <listitem><para>
+                    Bitbake now checks
+                    <link linkend='var-BBFILE_COLLECTIONS'><filename>BBFILE_COLLECTIONS</filename></link>
+                    for duplicate entries and triggers an error if any are
+                    found.
+                    </para></listitem>
+            </itemizedlist>
+        </para>
+    </section>
+
+    <section id='migration-2.7-qemu-native-splits-system-and-user-mode-parts'>
+        <title><filename>qemu-native</filename> Splits the System and User-Mode Parts</title>
+
+        <para>
+            The system and user-mode parts of <filename>qemu-native</filename>
+            are now split.
+            <filename>qemu-native</filename> provides the user-mode components
+            and <filename>qemu-system-native</filename> provides the system
+            components.
+            If you have recipes that depend on QEMU's system emulation
+            functionality at build time, they should now depend upon
+            <filename>qemu-system-native</filename> instead of
+            <filename>qemu-native</filename>.
+        </para>
+    </section>
+
+    <section id='migration-2.7-upstream-tracking.inc-removed'>
+        <title>The <filename>upstream-tracking.inc</filename> File Has Been Removed</title>
+
+        <para>
+            The previously deprecated <filename>upstream-tracking.inc</filename>
+            file is now removed.
+            Any <filename>UPSTREAM_TRACKING*</filename> variables are now set
+            in the corresponding recipes instead.
+        </para>
+
+        <para>
+            Remove any references you have to the
+            <filename>upstream-tracking.inc</filename> file in your
+            configuration.
+        </para>
+    </section>
+
+    <section id='migration-2.7-distro-features-libc-removed'>
+        <title>The <filename>DISTRO_FEATURES_LIBC</filename> Variable Has Been Removed</title>
+
+        <para>
+            The <filename>DISTRO_FEATURES_LIBC</filename> variable is no
+            longer used.
+            The ability to configure glibc using kconfig has been removed
+            for quite some time making the <filename>libc-*</filename> features
+            set no longer effective.
+        </para>
+
+        <para>
+            Remove any references you have to
+            <filename>DISTRO_FEATURES_LIBC</filename> in your own layers.
+        </para>
+    </section>
+
+    <section id='migration-2.7-packaging-changes'>
+        <title>Packaging Changes</title>
+
+        <para>
+            This section provides information about packaging changes.
+            <itemizedlist>
+                <listitem><para>
+                    <filename>bind</filename>: The
+                    <filename>nsupdate</filename> binary has been moved to
+                    the <filename>bind-utils</filename> package.
+                    </para></listitem>
+                <listitem><para>
+                    Debug split: The default debug split has been changed to
+                    create separate source packages.
+                    </para></listitem>
+                <listitem><para>
+                    <filename>util-linux</filename>:
+                    <itemizedlist>
+                        <listitem><para>
+                            <filename>blkdiscard</filename> has been split out
+                            into own package.
+                            </para></listitem>
+                        <listitem><para>
+                            one package per binary (pt 1:
+                            <filename>base_sbindir</filename>)
+                            </para></listitem>
+                        <listitem><para>
+                            one package per binary (pt 2:
+                            <filename>base_bindir</filename>)
+                            </para></listitem>
+                        <listitem><para>
+                            one package per binary (pt 3:
+                            <filename>sbindir</filename>)
+                            </para></listitem>
+                        <listitem><para>
+                            one package per binary (pt 4:
+                            <filename>bindir</filename>)
+                            </para></listitem>
+                        <listitem><para>
+                            <filename>/etc/default/mountall</filename> has
+                            moved into the -mount sub-package.
+                            </para></listitem>
+                    </itemizedlist>
+                    </para></listitem>
+                <listitem><para>
+                    <filename>netbase/base-files</filename>:
+                    <filename>/etc/hosts</filename> has moved from
+                    <filename>netbase</filename> to
+                    <filename>base-files</filename>.
+                    </para></listitem>
+                <listitem><para>
+                    <filename>tzdata</filename>: The main package has been
+                    converted to an empty meta package that pulls in all
+                    <filename>tzdata</filename> packages by default.
+                    </para></listitem>
+                <listitem><para>
+                    <filename>lrzsz</filename>: This package has been removed
+                    from <filename>packagegroup-self-hosted</filename> and
+                    <filename>packagegroup-core-tools-testapps</filename>.
+                    The X/Y/ZModem support is less likely to be needed on
+                    modern systems.
+                    If you are relying on these packagegroups to include the
+                    <filename>lrzsz</filename> package in your image, you
+                    now need to explicitly add the package.
+                    </para></listitem>
+            </itemizedlist>
+        </para>
+    </section>
+
+    <section id='migration-2.7-removed-recipes'>
+        <title>Removed Recipes</title>
+
+        <para>
+            The following recipes have been removed:
+            <literallayout class='monospaced'>
+     gcc: Drop version 7.3 recipes. Version 8.3 now remains.
+     linux-yocto: Drop versions 4.14 and 4.18 recipes. Versions 4.19 and 5.0 remain.
+     go: Drop version 1.9 recipes. Versions 1.11 and 1.12 remain.
+     xvideo-tests: Became obsolete.
+     libart-lgpl: Became obsolete.
+     gtk-icon-utils-native: These tools are now provided by gtk+3-native
+     gcc-cross-initial: No longer needed. gcc-cross/gcc-crosssdk are now used.
+     gcc-crosssdk-initial: No longer needed. gcc-cross/gcc-crosssdk are now used.
+     glibc-initial: Removed because the benefits of having it for site_config are
+        currently outweighed by the cost of building the recipe.
+            </literallayout>
+         </para>
+    </section>
+
+    <section id='migration-2.7-removed-classes'>
+        <title>Removed Classes</title>
+
+        <para>
+            The following classes have been removed:
+            <literallayout class='monospaced'>
+     distutils-tools: This class was never used.
+     bugzilla.bbclass: Became obsolete.
+     distrodata: This functionally has been replaced by a more modern
+         tinfoil-based implementation.
+            </literallayout>
+        </para>
+    </section>
+
+    <section id='migration-2.7-miscellaneous-changes'>
+        <title>Miscellaneous Changes</title>
+
+        <para>
+            The following miscellaneous changes occurred:
+            <itemizedlist>
+                <listitem><para>
+                    The <filename>distro</filename> subdirectory of the Poky
+                    repository has been removed from the top-level
+                    <filename>scripts</filename> directory.
+                    </para></listitem>
+                <listitem><para>
+                    Perl added a version that builds recipes using
+                    <filename>perl-cross</filename>
+                    </para></listitem>
+                <listitem><para>
+                    <filename>arm-tunes</filename>: Removed the "-march"
+                    option if mcpu is already added.
+                    </para></listitem>
+                <listitem><para>
+                    <filename>update-alternatives</filename>: Convert file
+                    renames to
+                    <link linkend='var-PACKAGE_PREPROCESS_FUNCS'><filename>PACKAGE_PREPROCESS_FUNCS</filename></link>
+                    </para></listitem>
+                <listitem><para>
+                    <filename>base/pixbufcache</filename>: Obsolete
+                    <filename>sstatecompletions</filename> code has been
+                    removed.
+                    </para></listitem>
+                <listitem><para>
+                    <link linkend='ref-classes-native'><filename>native</filename></link>
+                    class:
+                    <link linkend='var-RDEPENDS'><filename>RDEPENDS</filename></link>
+                    handling has been enabled.
+                    </para></listitem>
+                <listitem><para>
+                    <filename>inetutils</filename>: This recipe has rsh
+                    disabled.
+                    </para></listitem>
+            </itemizedlist>
+        </para>
+    </section>
+</section>
 </chapter>
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