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KERNEL_FEATURES are explicitly checked by the kern-tools, and trigger and error when not present. This is since the KERNEL_FEATURES are specified by layers or BSPs as elements that are requied for correct operation. That being said, in order to support more kernel recipes that are using fragments, but not necessarily the yocto kernel-cache for meta-data, this change introduces: KERNEL_DANGLING_FEATURES_WARN_ONLY As you'd expect, when set, missing kernel features only print a message and warn that runtime issues may occur, but otherwise allow the kernel configuration and build process to continue. This was noticed/required when meta-virtualization adopted a more generic kernel bbappend (to serve the needs of more layers in the ecosystem), but also specifies some KERNEL_FEATURES. If layers using a recipe derived from kernel-yocto, but not the main kernel-cache, used meta-virtualization and error would be thrown due to missing features. We now can both allow them to continue, and also provide a more useful message to resolve the issue. (From OE-Core rev: 8d44ea9fbb1ee7bec1062505a9bb1e2d7b360094) Signed-off-by: Bruce Ashfield <bruce.ashfield@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.