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Richard Purdie
8ae762ada1
Currently if you build qemux86 and then generic86, the latter will remove all of the former from deploy and workdir. This is because qemux86 is i586, genericx86 is i686 and the architctures are compatible therefore the sstate 'cleaup' code kicks in. There was a valid reason for this to ensure i586 packages didn't get into an i686 rootfs for example. With the rootfs creation being filtered now, this is no longer necessary. Instead, save out a list of stamps which a give machine has ever seen in a given build and only clean up these things if they're no longer "reachable". In particular this means the autobuilder should no longer spend a load of time deleting files when switching MACHINE, improving build times. (From OE-Core rev: 5634f2fb1740732056d2c1a22717184ef94405bf) 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.