Richard Purdie d0f86a99f7 bitbake: runqueue: Ensure task dependencies are run correctly
We've seen a number of mystery failures where task B would run despite
task A, its dependency not having run. An example would be do_compile
when do_unpack didn't run.

This has been tracked down to this code block. In theory it shouldn't
trigger however it can and has due to bugs elsewhere. When it does, it
causes significant weird failures and possible build corruption.

Change the code to abort the build. This avoids any chance of corruption
and should ensure the issues get reported, putting an end to the weird
build failures.

There may be some cases where this triggers and it shouldn't, we'll work
through those as they arise and are identified.

(Bitbake rev: 182b2ae7bab4a943978154be3a65c018aaf21fdc)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 7a92b7f58ab187eddfe550bd6fb687240c7b11bb)
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2020-01-11 11:06:23 +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.
Description
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