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

[Michael Niedermayer]

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

[...]
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Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

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