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He Zhe 3f7a2ca81b glibc: Disable CPU ISA level requirement check
We experience the following error and fail to boot on qemu64 machine

/lib64/libc.so.6: CPU ISA level is lower than required
Kernel panic - not syncing: Attempted to kill init! exitcode=0x00007f00

As stated in [1],

Passing -march= causes glibc to add annotations not compatible to run
result on -march= as too high ISA level is inferred.

ISA level is a new feature of 2.33 release.

Until it's fixed let's disable ISA level inference with
    libc_cv_include_x86_isa_level=no
(no better configure option yet).

[1] https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=5dbd6a821ff753e3b41324c4fb7c58cf65eeea33

(From OE-Core rev: 91264e14a088013b138e82520744f79fa7c8d585)

Signed-off-by: He Zhe <zhe.he@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2021-03-02 14:15:34 +00:00

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.
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