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adc37721a8
Converts sstate so that it can use a hash equivalence server to
determine if a task really needs to be rebuilt, or if it can be restored
from a different (equivalent) sstate object.
The unique hashes are cached persistently using persist_data. This has
a number of advantages:
1) Unique hashes can be cached between invocations of bitbake to
prevent needing to contact the server every time (which is slow)
2) The value of each tasks unique hash can easily be synchronized
between different threads, which will be useful if bitbake is
updated to do on the fly task re-hashing.
[YOCTO #13030]
(From OE-Core rev: d889acb4f8f06f09cece80fa12661725e6e5f037)
Signed-off-by: Joshua Watt <JPEWhacker@gmail.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.