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Robert Yang 8eb91205f6 multilib.bbclass: Reduce ALTERNATIVE_PRIORITY for extended recipes
Fixed:
MACHINE = "qemux86-64"
require conf/multilib.conf
MULTILIBS = "multilib:lib32"
DEFAULTTUNE_virtclass-multilib-lib32 = "x86"

$ bitbake core-image-minimal
update-alternatives: libtool has multiple providers with the same priority,
please check
/path/to/rootfs/usr/lib/opkg/alternatives/libtool for details

Both libtool and lib32-libtool have the same priority (as they're the same
recipe), so update-alternatives won't deterministically pick a provider. This
means you could end up with an image using a 32-bit pkgconfig and 64-bit
libtool, for example.

Make extended recipes reduce priority by 1 (or 2, 3 ... when there are multiple
variants in MULTILIB_VARIANTS) to fix the problem.

[YOCTO #13418]

(From OE-Core rev: a2f53255ed7fb3657c470cd6a4452d883edd11cc)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2019-06-27 12:20:36 +01:00
2018-02-24 10:31:45 +00:00

QEMU Emulation Targets
======================

To simplify development, the build system supports building images to
work with the QEMU emulator in system emulation mode. Several architectures
are currently supported in 32 and 64 bit variants:

  * ARM (qemuarm + qemuarm64)
  * x86 (qemux86 + qemux86-64)
  * PowerPC (qemuppc only)
  * MIPS (qemumips + qemumips64)

Use of the QEMU images is covered in the Yocto Project Reference Manual.
The appropriate MACHINE variable value corresponding to the target is given
in brackets.
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