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Hongxu Jia reported a problem where the bb_cache files were not always being written out correctly. This was due to the sync thread being terminated prematurely. Whilst the preceeding changes mean the exit handler for this thread is now correctly called since we switch to using sys.exit() instead of os._exit(), this write can happen after we drop the bitbake lock, leading to potential races. Avoid that headache by adding in explicit thread join() calls before we drop the lock (which atexit or Finalize can't do). (Bitbake rev: 6d2dd16b87ce62086f956912e9a7335b2adfcc94) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> Signed-off-by: Steve Sakoman <steve@sakoman.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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.