[FFmpeg-devel] In Leopard library is broken if compiled with Tiger compatibility

Måns Rullgård mans
Sun Dec 7 15:16:38 CET 2008

?????????? ??????????? <panayotis at panayotis.com> writes:

> On 07 ??? 2008, at 3:30 ??, M?ns Rullg?rd wrote:
>> ?????????? ??????????? <panayotis at panayotis.com>  
>> writes:
>>> On 07 ??? 2008, at 2:59 ??, M?ns Rullg?rd wrote:
>>>> ?????????? ???????????  
>>>> <panayotis at panayotis.com>
>>>> writes:
>>>>> In Mac OS X 10.5, in order to produce binary compatible code with
>>>>> version 10.4, there is a need to manually add the command line
>>>>> argument
>>>>> -mmacosx-version-min=10.4
>>>>> or else the produced code will not be binary compatible with  
>>>>> previous
>>>>> version.
>>> ...
>>>> The Apple build system is broken.  There's nothing we can do about
>>>> that.
>>> As most systems. Windows for example ;)
>>> Yes there is, I even included a proposed solution. If you don't want
>>> to do anything, even with a solution provided, it's another thing.
>> What you suggested is not a solution.  It's an ugly hack that appears
>> to work for you.
>> Can FFmpeg be built on an OSX 10.4 system?
> Ugly hack is the    #define _XOPEN_SOURCE 600

That is not a hack, that's what the SUSv3 standard says you must do.

> And this is what I was trying to avoid.

Why do you want to avoid following the standard?

> This should be really defined only for the systems that really need it  

Strictly speaking, the systems that do *not* need that #define to
expose XSI extensions are in violation of the standard.

> (I think it's for windows only but I might be wrong).

You are very wrong.

> The correct should be something like
> #ifdef __WINDOWS__
> etc. but I don't really know which operating systems really need the   
> mkstemp() function hack with this #define.

May I suggest you find out all the facts before offering your

> About your question:  Yes it works,

That means FFmpeg is compatible with OSX 10.4, and the 10.4
compatibility in 10.5 is at fault.

> but it actually breaks compatibility issues with other OS X
> versions.  If you need more information I will be more than happy to
> explain the situation.

Humour me.

M?ns Rullg?rd
mans at mansr.com

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