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ref-manual: Added notes to the DEPENDS variable description.

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Fixes [YOCTO #9933]

Added two notes to help clarify how DEPENDS works with pre-compiled
objects.  There are some details that trip people up.

(From yocto-docs rev: 06917e97adf24816b0aee6fdfdd14aa79d4c6ab2)

Signed-off-by: Scott Rifenbark <srifenbark@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Scott Rifenbark
2016-07-14 12:31:38 -07:00
committed by Richard Purdie
parent b09a3adb64
commit acdfb5f3cc
1 changed files with 33 additions and 0 deletions
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documentation/ref-manual/ref-variables.xml
+33
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@@ -2791,6 +2791,39 @@
task of recipe "b". task of recipe "b".
This means anything that recipe "b" puts into sysroot This means anything that recipe "b" puts into sysroot
is available when recipe "a" is configuring itself. is available when recipe "a" is configuring itself.
<note>
<title>Notes</title>
<itemizedlist>
<listitem><para>
<filename>DEPENDS</filename> is a list of
recipe names.
Or, to be more precise, it is a list of
<link linkend='var-PROVIDES'><filename>PROVIDES</filename></link>
names, which usually match recipe names.
Putting a package name such as "foo-dev" in
<filename>DEPENDS</filename> does not make
sense.
Use "foo" instead, as this will put files
from all the packages that make up "foo" -
including those from "foo-dev" - into the
sysroot.
</para></listitem>
<listitem><para>
Counter intuitively,
<filename>DEPENDS</filename> is often necessary
even for recipes that install precompiled
components.
For example, if "libfoo" is a precompiled
library that links against "libbar", then
linking against "libfoo" requires both "libfoo"
and "libbar" to be available in the sysroot.
Without a <filename>DEPENDS</filename> from the
recipe that installs "libfoo" to the recipe
that installs "libbar", other recipes might
fail to link against "libfoo".
</para></listitem>
</itemizedlist>
</note>
</para> </para>
<para> <para>