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Alexander Kanavin 7bc55b2960 meta/lib/oe/package_manager.py: deprecate 'exit 1' as a way to defer to first boot
'exit 1' is not optimal for two reasons:

1) Code is hard to read; it is not obvious that it means 'defer what follows to first boot'.
2) Worse, this hides actual errors in the scriptlets; there is no difference between scriptlet
failing because it's intended to be run on target and scriptlet failing because there's a bug or
a regression somewhere.

The new, supported way is to place the code that has to run on target into pkg_postinst_ontarget(),
or, if a more fine-tuned control is required, call 'postinst-intercepts defer_to_first_boot' from
pkg_postinst() to explicitly request deferral to first boot.

(From OE-Core rev: d12cf56e9ff2a4f13dfbef9290ea5647b52b3f6d)

Signed-off-by: Alexander Kanavin <alexander.kanavin@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2018-01-30 11:50:12 +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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