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documentation/poky-ref-manual/faq.xml: Added new FAQ entry x-toolchain 

Added a new FAQ entry per Richard Purdie answering the question
'How do I use an external toolchain?'

(From yocto-docs rev: 58b78df0d78637234cbcb0e70e225b72ba0f9a2b)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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Scott Rifenbark 2011-05-23 18:49:33 -05:00 committed by Richard Purdie
parent 4a7bf7dd9d
commit baf6bf4a5d
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@ -428,6 +428,39 @@
</answer>
</qandaentry>
<qandaentry>
<question>
<para>
How do I use an external toolchain?
</para>
</question>
<answer>
<para>
The toolchain configuration is very flexible and customizable.
It is primarily controlled with the TCMODE variable.
This variable controls which file to include
(<filename>conf/distro/include/tcmode-*.inc</filename>).
</para>
<para>
The default value of TCMODE is "default".
However, other patterns are accepted.
In particular, "external-*" refers to external toolchains of which there are some basic examples
included with the core.
A user can use their own custom toolchain definition in their own layer
(or <filename>local.conf</filename> directory) at the location
<filename>conf/distro/include/tcmode-*.inc</filename>.
</para>
<para>
In addition to the toolchain configuration, you also need a corresponding toolchain recipe file.
This recipe file needs to package up any pre-built objects in the toolchain such as
<filename>libgcc</filename>, <filename>libstdcc++</filename>,
any locales and <filename>libc</filename>.
An example is the <filename>external-csl-toolchain_2008q3-72.bb</filename>, which reuses the core
<filename>libc</filename> packaging class to do most of the work.
</para>
</answer>
</qandaentry>