[FFmpeg-devel] [PATCH] udp: Define _DARWIN_C_SOURCE

Martin Storsjö martin
Tue Oct 5 18:37:21 CEST 2010

On Tue, 5 Oct 2010, Luca Barbato wrote:

> On 10/5/10 3:20 PM, Martin Storsjo wrote:
> > This is required in order to get the IP_MULTICAST_TTL define.
> > 
> > _BSD_SOURCE is already defined for similar reasons.
> Shouldn't hurt.


I investigated related matters a bit more. We also check for struct 
ipv6_mreq in configure, which fails, since ipv6_mreq requires 
_DARWIN_C_SOURCE to be found, too.

And I guess we don't want to enable any such define globally for the whole 
build. Should we force users to manually specify _DARWIN_C_SOURCE via 
--extra-cflags if they really want this, or is there any way to enable 
this define only for one particular test in configure, where checking for 

// Martin

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