Bug 6505 - Multilib Support for meta-toolchain (missing rpm support, ipk fixed)
Summary: Multilib Support for meta-toolchain (missing rpm support, ipk fixed)
Status: RESOLVED FIXED
Alias: None
Product: OE-Core
Classification: Build System, Metadata & Runtime
Component: devtools / tool chain (show other bugs)
Version: 1.7
Hardware: x86 Multiple
: Medium enhancement
Target Milestone: 2.0
Assignee: Robert Yang
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Reported: 2014-07-04 06:20 UTC by ATUL
Modified: 2015-10-29 08:54 UTC (History)
10 users (show)

See Also:
OS type for building Yocto: ---
Type of Regression: ---
Verified:
Documentation change: Yes (doc changes required)

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Description ATUL 2014-07-04 06:20:18 UTC 
Hi,

I tried building toolchain using target for bitbake as meta-toochain with the configuration mention below:-
       Adding below configuration in the local.conf
           MACHINE = "qemux86-64"
           require conf/multilib.conf
           MULTILIBS = "multilib:lib32"
           DEFAULTTUNE_virtclass-multilib-lib32 = "x86"
And as per my understanding multilib means it should create multiple library files supporting each variant(like fpu, big endian, 64-bit etc). But the above changes did not create multiple library files.
While extarcting the toolchain it only create one libgcc.a at location $SDKTARGETSYSROOT/usr/lib/arm-poky-linux-gnueabi/4.9.0/libgcc.a
Please help me with your valuable suggestion.

Thanks and regards,
Atul
Comment 1 Mark Hatle 2014-07-25 13:53:09 UTC 
See: http://lists.openembedded.org/pipermail/openembedded-core/2014-July/094877.html

This patch has been provided by the community to attempt to resolve some of the issues.

Note, the patch does not work when 'package_rpm' is selected.  This is due to some limitations in the way the RPM package resolution occurs.  When using IPK, the patch will select multiple packagegroup files instead of just the main system.

A second patch is still needed for the packagegroups to be ARCH specific in their dependencies.
Comment 2 Richard Purdie 2014-07-25 15:12:43 UTC 
http://git.yoctoproject.org/cgit.cgi/poky/commit/?id=d8024434d4c9b6a3400ac494fa3c32d0827e42d3 has now merged and that ensures that meta-toolchain/populate_sdk have the appropriate multilib pieces. This *does* work with package_ipk, contra to what Mark mentions, no second patch is needed.

There is an rpm issue remaining and it does not work with the package_rpm backend. Reassigning to Mark to find someone to resolve the remaining rpm piece.