[Bug gas/21965] New: Kernel 4.12.5 compile fails -- Error: instruction `andn' isn't supported in 16-bit mode.

[fhlfibh at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=21965

            Bug ID: 21965
           Summary: Kernel 4.12.5 compile fails -- Error: instruction
                    `andn' isn't supported in 16-bit mode.
           Product: binutils
           Version: 2.28
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: fhlfibh at gmail dot com
  Target Milestone: ---

Hi,

While usual kernel update from 4.9.34 to 4.12.5 it fails with the error:

-------------------------------------------------------------
/tmp/cc3rZjPi.s: Assembler messages:
/tmp/cc3rZjPi.s:32: Error: instruction `andn' isn't supported in 16-bit mode.
/tmp/cc3rZjPi.s:40: Error: instruction `shlx' isn't supported in 16-bit mode.
make[1]: *** [scripts/Makefile.build:302: arch/x86/boot/cpucheck.o] Error 1
make: *** [arch/x86/Makefile:281: bzImage] Error 2
make: *** Waiting for unfinished jobs....
------------------------------------------------------------

GNU assembler version 2.28 (x86_64-pc-linux-gnu) using BFD version (Gentoo 2.28
p1.2) 2.28

This bug here https://sourceware.org/bugzilla/show_bug.cgi?id=17421 seems to be
similar.

My report on Gentoo bugtracker https://bugs.gentoo.org/show_bug.cgi?id=627890

My report with more detailed debug on kernel.org bugtracker
https://bugzilla.kernel.org/show_bug.cgi?id=196689

Really, I don't know whose bug it actually is...

Sorry.

Regards,
Alex

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