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Geoff Parker 50f41202cc wic: make engine.py:get_partitions() resilient to parted/dmidecode stderr output
Running wic commands on Debian 10 systems fail in
scripts/lib/wic/engine.py:get_partitions() due to new stderr output captured
when trying to parse the output from /sbin/parted as a non-root user.

The parted command calls the dmidecode utility, which produces this error
as a non-root user:
    /sys/firmware/dmi/tables/smbios_entry_point: Permission denied
    /dev/mem: Permission denied

scripts/lib/wic/engine.py:get_partitions() calls misc.py:exec_cmd(),
a subprocess wrapper which returns a combined stderr and sdtdout.
These messages to stderr confuse the partition table parser in
get_partitions().

This patch has the partition table parser ignore lines before the expected
"BYT;" header string.

Running wic in Debian 9 does not have this issue.

(From OE-Core rev: d6936301d7598b7a783beaae95109555faf6cc17)

Signed-off-by: Geoff Parker <geoffhp@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2018-10-12 16:57:21 +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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