[Buildroot] [PATCH v2 15/17] openal: add missing BR2_TOOLCHAIN_HAS_SYNC_4 dependency

[André Hentschel]

Hi,

Am 30.01.2016 um 00:06 schrieb Thomas Petazzoni:
> André,
> 
> On Fri, 29 Jan 2016 19:34:42 +0100, André Hentschel wrote:
>> Hi Thomas,
>>
>> Isn't openal looking for the atomic functions and not for the sync ones?
>> As seen in the URL you provided:
>>
>> libopenal.so.1.17.1: undefined reference to `__atomic_fetch_sub_4'
>> libopenal.so.1.17.1: undefined reference to `__atomic_compare_exchange_4'
>> libopenal.so.1.17.1: undefined reference to `__atomic_fetch_add_4'
> 
> Hum, you are right indeed. I will look into this again, but if it's a
> dependency on __atomic functions, then it should depend on gcc >= 4.7
> *and* link with libatomic.

I looked a bit closer and openal has its own checks for availability of sync/atomic functions...
So the dependecy is something like (gcc >= 4.7 || has_sync_4)
Not sure how to make it link to libatomic without patching...