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dev-manual: clarify how to select "read-only-rootfs"

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For stylistic reasons, clarify the use of both IMAGE_FEATURES versus
EXTRA_IMAGE_FEATURES when configuring a read-only rootfs.

(From yocto-docs rev: 4111e4e70a87400671455ddd873d802d40d6b587)

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Robert P. J. Day
2020-04-07 05:41:58 -04:00
committed by Richard Purdie
parent fc4d55008e
commit 4a115c52cf
1 changed files with 9 additions and 9 deletions
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documentation/dev-manual/dev-manual-common-tasks.xml
+9 -9
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@@ -11195,18 +11195,18 @@
<para>
To create the read-only root filesystem, simply add the
"read-only-rootfs" feature to your image.
Using either of the following statements in your
image recipe or from within the
<filename>local.conf</filename> file found in the
<ulink url='&YOCTO_DOCS_REF_URL;#build-directory'>Build Directory</ulink>
causes the build system to create a read-only root filesystem:
"read-only-rootfs" feature to your image, normally in one of two ways.
The first way is to add the "read-only-rootfs" image feature
in the image's recipe file via the
<filename>IMAGE_FEATURES</filename> variable:
<literallayout class='monospaced'>
IMAGE_FEATURES = "read-only-rootfs"
IMAGE_FEATURES += "read-only-rootfs"
</literallayout>
or
As an alternative, you can add the same feature from within your
build directory's <filename>local.conf</filename> file with the
associated <filename>EXTRA_IMAGE_FEATURES</filename> variable, as in:
<literallayout class='monospaced'>
EXTRA_IMAGE_FEATURES += "read-only-rootfs"
EXTRA_IMAGE_FEATURES = "read-only-rootfs"
</literallayout>
</para>