Re: [Qemu-devel] [PULL 0/8] target/s390x tcg improvements

[Peter Maydell]

On 17 July 2017 at 20:36, Richard Henderson <address@hidden> wrote:
> On 07/17/2017 12:46 AM, Peter Maydell wrote:
>>
>> Hi. This fails to link with clang (OSX, linux, freebsd):
>>
>> Undefined symbols for architecture x86_64:
>>    "_helper_atomic_cmpxchgq_be_mmu", referenced from:
>>        _helper_csst in mem_helper.o
>> ld: symbol(s) not found for architecture x86_64
>> clang: error: linker command failed with exit code 1 (use -v to see
>> invocation)
>
>
> What os and clang version?
>
> Because, frankly, I can't even get this far with clang 3.9 as shipped with
> fedora 25.  As far as I can see top-of-tree doesn't build at all with that
> compiler.

This was OSX 10.12.5 (Sierra) running
Apple LLVM version 7.0.0 (clang-700.1.76)
(running strings on the binary suggests this is based
on upstream clang 3.7.0)

and Linux Ubuntu x86_64 Xenial running
clang version 3.8.0-2ubuntu4 (tags/RELEASE_380/final)

and FreeBSD 11.0 running
FreeBSD clang version 3.8.0 (tags/RELEASE_380/final 262564) (based on
LLVM 3.8.0)

If we don't build with clang 3.9 that's worth fixing;
it's not in my test set, which will be why the
breakage has slipped through.

thanks
-- PMM