[FFmpeg-devel] Compilation broken on PPC/OS X 10.4

[Jean-Daniel Dupas]

Le 8 mars 2010 ? 15:40, Martin Storsj? a ?crit :

> On Mon, 8 Mar 2010, M?ns Rullg?rd wrote:
> 
>> Kostya <kostya.shishkov at gmail.com> writes:
>> 
>>> On Mon, Mar 08, 2010 at 03:57:24PM +0200, Martin Storsj? wrote:
>>>> Hi,
>>>> 
>>>> Since rev 22267, compilation of libavcodec/ppc/check_altivec.c is broken 
>>>> on OS X, if compiling with a 10.4 SDK. (This doesn't happen if compiling 
>>>> with the 10.5 SDK.) The error is:
>>>> 
>>>> /Developer/SDKs/MacOSX10.4u.sdk/usr/include/signal.h:71: error: 'NSIG' 
>>>> undeclared here (not in a function)
>>>> 
>>>> There's a dependency between sys/signal.h (implicitly included through 
>>>> dsputil_altivec.h) and signal.h (included through sys/sysctl.h); NSIG is 
>>>> defined in sys/signal.h, only if it's going to be used by signal.h. If the 
>>>> _POSIX_C_SOURCE defined is changed inbetween, NSIG is required without 
>>>> being defined.
>>>> 
>>>> The attached patch is one way of solving this, although perhaps not the 
>>>> cleanest.
>>>> 
>>>> Other suggestions on how to fix it, or the usual "broken platform" flames? 
>>>> :-)
>>> 
>>> I complained about that yesterday on IRC, David said it compiles fine on
>>> 10.5/PPC though, so it may be definitely a case of broken platform. 
>> 
>> Is 10.4 at all relevant nowadays?
> 
> For normal usage, not particularly, but I think it still is a relatively 
> common binary compatibility baseline; I still compile most release stuff 
> for 10.4, but don't know about others. VLC seems to have moved on to 10.5 
> as a base line for new stuff, at least.
> 

You don't have to use 10.4 SDK to compile for 10.4 anyway, as long as you set the min target version to 10.4.



-- Jean-Daniel