[FFmpeg-user] Compiling on an aarch64 machine

[Verachten Bruno]

> > > CFLAGS='-mfpu=neon'

> > > This is apparently not ignored (I thought it should be) and you are
> > > therefore responsible not to set these variables.
> > Thanks a lot. Unfortunately, These variables are not set on my machine...
> > or am I mistaken?
> I tested that if I don't export CFLAGS, they do not show up in config.log,
> if I export a value, I can reproduce your issue (or I can set a value that
> does not break compilation).
>
> I also confirmed that git grep mfpu did not show anything suspicious.
>
> In general, builds that use CFLAGS are not supported.

I exported an empty CFLAGS variable, and configure succeeded. The same
happened for x264.
The compilation is not finished yet, but all looks fine to me.

Could this behaviour be considered as a bug? If so, I can file it.
If not, thanks a lot for your help.