10.6.8 and ffmpeg

[Jeremy Huddleston Sequoia]

> On Nov 2, 2016, at 09:31, Ken Cunningham <ken.cunningham.webuse at gmail.com> wrote:
> 
> 
> On 2016-11-02, at 2:03 AM, Jeremy Huddleston Sequoia wrote:
> 
>> Do you know *why* it is requiring the 10.7 SDK to build?  Why can't libsdl2 use the 10.6 SDK effectively?
>> 
> 
> I took a quick look at the code. It has a lot of AVAILABILITY_ macros in it, a few mentioning 10.7, most of them mentioning IOS / IPHONE things.

I don't see any AVAILABILITY_ macros.  I do see on interesting reference to 10.7 in src/video/cocoa/SDL_cocoawindow.m:

~/src/macports/dports/devel/libsdl2/work/SDL2-2.0.5 $ ack AVAILABILITY_

~/src/macports/dports/devel/libsdl2/work/SDL2-2.0.5 $ ack 10\\.7
docs/README-macosx.md
19:32-bit and 64-bit Intel architectures), on Mac OS X 10.7 and newer, by using
32:Please note that building SDL requires at least Xcode 4.6 and the 10.7 SDK

include/SDL_hints.h
576: *   the OS isn't at least Mac OS X Lion (10.7). This hint must be set before

src/video/cocoa/SDL_cocoamodes.m
47:     *  It happens to work, as of 10.7, but we're going to see if

src/video/cocoa/SDL_cocoaopengl.m
178:    /* specify a profile if we're on Lion (10.7) or later. */
331:     * supported on 10.7+. */

src/video/cocoa/SDL_cocoavideo.m
155:    /* The IOPM assertion API can disable the screensaver as of 10.7. */

src/video/cocoa/SDL_cocoawindow.m
26:# error SDL for Mac OS X must be built with a 10.7 SDK or above.

---

That's just:

#if MAC_OS_X_VERSION_MAX_ALLOWED < 1070
# error SDL for Mac OS X must be built with a 10.7 SDK or above.
#endif /* MAC_OS_X_VERSION_MAX_ALLOWED < 1070 */

which doesn't indicate what the actual problem is.  What happens if you remove that?

> I assume that some of those macros don't work right with the 10.6 SDK, but the details of exactly which ones I didn't look into.
> 
> It seems like a lot of work (too much!) to try to fix that code, and the next version of libsdl2 would just break it all anyway.
> 
> The 10.7 SDK shouldn't be hard to find for anyone motivated to do so, and once it's on the buildbot (and we get that libc++ buildbot naming issue organized) that would make it sorta moot, I would think?
> 
> 
> Thanks,
> 
> Ken

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