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when build with EXTERNALSRC, checksum of EXTERNALSRC is one of inputs for generate sigdata of task do_compile. without change any source, the sigdata will not changed, and buildclean task only do make clean, and not clean stampfiles like clean task, so the stampfile keep there, then do_compile after do_buildclean will not rerun, and targetfile tempdir_mdadm/mdadm will not be generated, report below error: AssertionError: '/tmp/devtoolqarxv8ct6u/mdadm' does not exist Fix by add a comments in Makefile to trigger rebuild of compile task (From OE-Core rev: f4621cf4516f9de9980f3864a193f3f61c4abedc) Signed-off-by: Changqing Li <changqing.li@windriver.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.