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40f37ab231
Fix error like:
Makefile.perf:597: recipe for target
'intel_x86_64-wrs-linux/perf/1.0-r9/perf-1.0/perf-in.o] Error 2
Makefile.perf:220: recipe for target 'sub-make' failed
make[1]: *** [sub-make] Error 2
Makefile:69: recipe for target 'all' failed
make: *** [all] Error 2
during rebuilding, when kernel version changed, some
source files also maybe changed. It could happened
that the source under ${S} messed up with some already
dropped files and also new files. Fix by clean the ${S}
before copy source files.
(From OE-Core rev: 57b4745cca8d486c1f20b8f01f4a25cb59c4b968)
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.