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authorScott Rifenbark <scott.m.rifenbark@intel.com>2014-03-20 17:52:28 -0600
committerRichard Purdie <richard.purdie@linuxfoundation.org>2014-03-25 12:29:44 +0000
commit32890f29afd9bd93e22c325cdc24466982fb80a6 (patch)
treee6e5318d5028db92ede8aaeee17e8b49d349a8fd /documentation/adt-manual/adt-prepare.xml
parentc441f5f005f306a3dfc203237aab42b4a37336b5 (diff)
downloadpoky-32890f29afd9bd93e22c325cdc24466982fb80a6.tar.gz
adt-manual, ref-manual: Cross-toolchain details added. New class also.
In the adt-manual in the "Optionally Building a Toolchain Installer" setion, I added some basic advantage information for building a toolchain installer using bitbake image -c populate_sdk. In the ref-manual, I added cross-referencing to this basic information in several strategic areas: "SDK Generation", the populate_sdk class reference section, the populate_sdk_* class reference section, and the "Cross-Development Toolchain Generation" sections. Finally, I also put in documentation for a new class called autotools-brokensep. (From yocto-docs rev: cde7dd2fbd7bdc0d71dc678ee7a5422459654287) Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'documentation/adt-manual/adt-prepare.xml')
-rw-r--r--documentation/adt-manual/adt-prepare.xml33
1 files changed, 29 insertions, 4 deletions
diff --git a/documentation/adt-manual/adt-prepare.xml b/documentation/adt-manual/adt-prepare.xml
index 0dbbe4dcc8..bb35c28f25 100644
--- a/documentation/adt-manual/adt-prepare.xml
+++ b/documentation/adt-manual/adt-prepare.xml
@@ -584,17 +584,42 @@
584 you can build the toolchain installer one of two ways if you have a 584 you can build the toolchain installer one of two ways if you have a
585 <ulink url='&YOCTO_DOCS_DEV_URL;#build-directory'>Build Directory</ulink>: 585 <ulink url='&YOCTO_DOCS_DEV_URL;#build-directory'>Build Directory</ulink>:
586 <itemizedlist> 586 <itemizedlist>
587 <listitem><para>Use <filename>bitbake meta-toolchain</filename>. 587 <listitem><para>
588 Use <filename>bitbake meta-toolchain</filename>.
588 This method requires you to still install the target 589 This method requires you to still install the target
589 sysroot by installing and extracting it separately. 590 sysroot by installing and extracting it separately.
590 For information on how to install the sysroot, see the 591 For information on how to install the sysroot, see the
591 "<link linkend='extracting-the-root-filesystem'>Extracting the Root Filesystem</link>" 592 "<link linkend='extracting-the-root-filesystem'>Extracting the Root Filesystem</link>"
592 section.</para></listitem> 593 section.
593 <listitem><para>Use 594 </para></listitem>
594 <filename>bitbake image -c populate_sdk</filename>. 595 <listitem><para>
596 Use <filename>bitbake image -c populate_sdk</filename>.
595 This method has significant advantages over the previous method 597 This method has significant advantages over the previous method
596 because it results in a toolchain installer that contains the 598 because it results in a toolchain installer that contains the
597 sysroot that matches your target root filesystem. 599 sysroot that matches your target root filesystem.
600 </para>
601
602 <para>Another powerful feature is that the toolchain is
603 completely self-contained.
604 The binaries are linked against their own copy of
605 <filename>libc</filename>, which results in no dependencies
606 on the target system.
607 To achieve this, the pointer to the dynamic loader is
608 configured at install time since that path cannot be dynamically
609 altered.
610 This is the reason for a wrapper around the
611 <filename>populate_sdk</filename> archive.</para>
612
613 <para>Another feature is that only one set of cross-canadian
614 toolchain binaries are produced per architecture.
615 This feature takes advantage of the fact that the target
616 hardware can be passed to <filename>gcc</filename> as a set of
617 compiler options.
618 Those options are set up by the environment script and
619 contained in variables like CC and LD.
620 This reduces the space needed for the tools.
621 Understand, however, that a sysroot is still needed for every
622 target since those binaries are target-specific.
598 </para></listitem> 623 </para></listitem>
599 </itemizedlist> 624 </itemizedlist>
600 </para> 625 </para>