[Spice-devel] [spice-protocol] Use gcc builtin rather than asm for memory barriers

[Uri Lublin]

On 01/08/2016 11:41 AM, Frediano Ziglio wrote:
>>
>> On Thu, Jan 07, 2016 at 09:35:34PM +0200, Uri Lublin wrote:
>>> On 01/06/2016 12:26 PM, Christophe Fergeau wrote:
>>>> This should make things more portable.
>>>
>>> Hi Christophe,
>>>
>>> This only works for building with (not too old) gcc.
>>>
>>> It would be safer to check that in configure and
>>> add a conditional here.
>>
>> This works starting from 4.4 (sync_synchronize was available before but
>> broken on x86 if I read
>> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=36793 correctly).
>> EL6 has gcc 4.4 as Frediano pointed out, so I think we'll be fine
>> with this.
>>
>> Christophe
>>
>
> According to https://gcc.gnu.org/releases.html gcc 4.4 was released on April 2009.
> According to packages.ubuntu.com precise (12.04) supports gcc 4.4.
> Unless we want to compile with a RH 5 looks like 4.4 should be available.
> On the other side you never know on which environment people wants to compile stuff
> but I vote to just assume gcc 4.4.
>
> Frediano
>

OK.