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The rationale is to streamline the overall build. The system parts are only needed to run target images, and so can be built towards the end of the build process. At the same time, the system parts may need gtk+-native and mesa-native which add significantly to the build time. On the other hand, the usermode parts have almost no dependencies and can be built quickly. They are needed at recipes build time to run target binaries, and so are required quite early in the typical build process. (From OE-Core rev: 4a558a5f2db68538e0edad798ddf48eb9510a7d6) Signed-off-by: Alexander Kanavin <alex.kanavin@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.