[OE-core] [PATCH 2/2] libatomics-ops: force omit frame pointer for x86 builds

[Paul Barker]

On 17 July 2013 11:45, Phil Blundell <pb at pbcl.net> wrote:
> On Wed, 2013-07-17 at 16:40 +0800, Jesse Zhang wrote:
>> Fix failures when building with -fno-omit-frame-pointer (and without
>> optimization, i.e. -O0):
>>
>>     In file included from atomic_ops.h:212:0,
>>                      from atomic_ops_stack.h:32,
>>                      from atomic_ops_stack.c:23:
>>     atomic_ops/sysdeps/gcc/x86.h: In function 'AO_compare_double_and_swap_double_full':
>>     atomic_ops/sysdeps/gcc/x86.h:148:3: error: 'asm' operand has impossible constraints
>>        __asm__ __volatile__("xchg %%ebx,%6;" /* swap GOT ptr and new_val1 */
>
> This seems like it must be a bug in either GCC or the libatomic-ops
> source code, and whichever one has the bug ought to be fixed.  Forcing
> -fomit-frame-pointer might be ok as a temporary measure but it doesn't
> seem like a very good long-term solution.
>

If this is on x86, standard Linux desktop/server distros may have ran
into the same problem. Maybe worth having a look if/how they handle
this.

--
Paul Barker

Email: paul at paulbarker.me.uk
http://www.paulbarker.me.uk