Richard Purdie 9062a225aa bitbake: cache: Fix performance problem with large numbers of source files
Some companies are using large numbers of patch files in SRC_URI.
Rightly or wrongly that exposes a performance problem where the code
does not handle the large string manipulations in a way which works
efficienty in python.

This is a modified version of a patch from z00539568
<zhangyifan46@huawei.com153340508@qq.com which addresses the performance
problem. I modified it to use a more advanced regex, retain the "*" check
and cache the regex.

[YOCTO #13824]

(Bitbake rev: c07f374998903359ed55f263c86466d05aa39b68)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2020-04-26 13:41:29 +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.
Description
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Readme 251 MiB