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Devendra Tewari 581233a798 bitbake: lib/bb: Add bb.utils.rename() helper function and use for renaming
os.rename can fail for example an incremental build in Docker fails with:

OSError: [Errno 18] Invalid cross-device link

when source and destination are on different overlay filesystems.

Rather than trying to fix every call site, add a wrapper in bb.utils
for renames. We can then handle cross device failures and
fall back to shutil.move. The reason os.rename is still used is
because shutil.move is too slow for speed sensitive sections of code.

[YOCTO #14301]

(Bitbake rev: c5c4e49574ab2a65e06298a0a77bb98b041cf56b)

Signed-off-by: Devendra Tewari <devendra.tewari@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2021-05-06 11:04:59 +01:00

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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