ref-manual: add usage NOTE to IMAGE_FSTYPES
Due to the way in which IMAGE_FSTYPES is processed, it is not possible to modify it using _append or _prepend. Therefore add a note to the manual to warn users in case they stumble on this issue. (From yocto-docs rev: 304e196329842d04356775fb8ad5d73466413e66) Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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@ -2199,6 +2199,15 @@
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you can choose, see
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<link linkend='var-IMAGE_TYPES'><filename>IMAGE_TYPES</filename></link>.
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</para>
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<note>
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Due to the way this variable is processed, it is not
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possible to update its contents using
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<filename>_append</filename> or
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<filename>_prepend</filename>. To add one or more
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additional options to this variable the
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<filename>+=</filename> operator must be used.
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</note>
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</glossdef>
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</glossentry>
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