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Sean Christopherson
7cf2e7373a
Explicitly disable the compiler's builtin memcmp(), memcpy(), and
memset(). Because only lib/string_override.c is built with -ffreestanding,
the compiler reserves the right to do what it wants and can try to link the
non-freestanding code to its own crud.
/usr/bin/x86_64-linux-gnu-ld: /lib/x86_64-linux-gnu/libc.a(memcmp.o): in function `memcmp_ifunc':
(.text+0x0): multiple definition of `memcmp'; tools/testing/selftests/kvm/lib/string_override.o:
tools/testing/selftests/kvm/lib/string_override.c:15: first defined here
clang: error: linker command failed with exit code 1 (use -v to see invocation)
Fixes: 6b6f71484b ("KVM: selftests: Implement memcmp(), memcpy(), and memset() for guest use")
Reported-by: Aaron Lewis <aaronlewis@google.com>
Reported-by: Raghavendra Rao Ananta <rananta@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20221213001653.3852042-10-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.