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-rw-r--r--documentation/ref-manual/ref-variables.xml18
1 files changed, 13 insertions, 5 deletions
diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index fa652e57a1..fd15dff9a1 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -9592,14 +9592,22 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
9592 PREFERRED_VERSION_python = "2.7.3" 9592 PREFERRED_VERSION_python = "2.7.3"
9593 PREFERRED_VERSION_linux-yocto = "3.19%" 9593 PREFERRED_VERSION_linux-yocto = "3.19%"
9594 </literallayout> 9594 </literallayout>
9595 If you want to force a particular version of a recipe, 9595 Sometimes the <filename>PREFERRED_VERSION</filename>
9596 you can use "forcevariable" as follows: 9596 variable can be set by configuration files in a way that
9597 is hard to change.
9598 You can use
9599 <link linkend='var-OVERRIDES'><filename>OVERRIDES</filename></link>
9600 to set a machine-specific override.
9601 Here is an example:
9597 <literallayout class='monospaced'> 9602 <literallayout class='monospaced'>
9598 PREFERRED_VERSION_linux-yocto_forcevariable = "3.4%" 9603 PREFERRED_VERSION_linux-yocto_qemux86 = "3.4%"
9599 </literallayout> 9604 </literallayout>
9600 Another method is to use a machine override: 9605 Although not recommended, worst case, you can also use the
9606 "forcevariable" override, which is the strongest override
9607 possible.
9608 Here is an example:
9601 <literallayout class='monospaced'> 9609 <literallayout class='monospaced'>
9602 PREFERRED_VERSION_linux-yocto_qemux86 = "3.4%" 9610 PREFERRED_VERSION_linux-yocto_forcevariable = "3.4%"
9603 </literallayout> 9611 </literallayout>
9604 </para> 9612 </para>
9605 </glossdef> 9613 </glossdef>