[FFmpeg-devel] I compile the latest ffmpeg version on git and errors when compile in atomic.c

[compn]

On Thu, 28 Mar 2013 16:29:20 +0100, Michael Niedermayer wrote:
>On Thu, Mar 28, 2013 at 04:25:06AM -0300, James Almer wrote:
>> On 20/03/13 8:55 AM, Michael Niedermayer wrote:
>> > On Wed, Mar 20, 2013 at 01:23:33AM -0300, James Almer wrote:
>> >> On 20/03/13 12:43 AM, Wei Gao wrote:
>> >>> Hi
>> >>> libavutil/atomic.c:101:2: error: #error "Threading is enabled, but there is
>> >>> no implementation of atomic operations available"
>> >>>
>> >>> my environment is mingw gcc version 4.6.2 (GCC)
>> >>>
>> >>> Thanks
>> >>> Best regards
>> >>
>> >> Run configure using --cpu=i686 or your computer's CPU.
>> >> That will fix it.
>> > 
>> > If noone fixes mingw + threads + <i686 then please add a warning to
>> > configure so the user knows what happened and how he can workaround it
>> 
>> Adding something like
>> 
>> enabled_any w32threads os2threads && disabled_all sync_val_compare_and_swap machine_rw_barrier MemoryBarrier &&
>>                                      die "Something here"
>> 
>> to configure should be enough.
>> I'm however not sure what message to use for the die() call. Maybe something like "Atomic operations are not 
>> available with the selected thread type and CPU target combination"?
>
>the message should point to the i686 or i486 workaround if it works

can we set the host to i686 if compiled with mingw32 ?
i dont think there are many windows arm systems, and if so ,the winrt
guys are using ming-w64 already?

its going to fail either way, might as well try to support the most
amount of users possible. (how does libav handle this?)

-compn