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btrfs-tools compile fails with mips, musl and 5.12+ headers. The definition of __ALIGN_KERNEL has moved in 5.12+ kernels, so we add an explicit include of const.h to pickup the macro: | make: *** [Makefile:595: mkfs.btrfs] Error 1 | make: *** Waiting for unfinished jobs.... | libbtrfs.a(volumes.o): in function `dev_extent_search_start': | /usr/src/debug/btrfs-tools/5.12.1-r0/git/kernel-shared/volumes.c:464: undefined reference to `__ALIGN_KERNEL' | collect2: error: ld returned 1 exit status This is safe for older kernels as well, since the header still exists, and is valid to include. (From OE-Core rev: 78eb20ed31e27865c990f96803215139bc99060f) (From OE-Core rev: e81b531939214a1a34f8841a5f0aaf16fbbe4d08) Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.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.