QT Problems on macOS 15

[Mark E Anderson]

Side note - Fred, can you send me some ports where I can find the Float16 bug?

—Mark

On Sun, Aug 25, 2024, at 10:57 PM, Fred Wright wrote:
> 
> On Thu, 15 Aug 2024, Mark E Anderson wrote:
> 
> > Just a heads up, `CGDisplayCreateImageForRect` is no longer supported in the macOS 15 SDK.
> 
> I don't know what SDK you're looking at, but I see that definition in the 
> macOS 15 SDK here, in both the beta 4 and beta 6 versions of XCode 16.
> 
> If that were really true, it's a bug that would need to be fixed before it 
> comes out of beta, since Apple encourages, and in some cases requires, 
> builds to use the SDK for the next later OS version than the one being 
> targeted.  So the SDK for OS N+1 damn well better include all the 
> definitions for OS N.
> 
> There are at least two bugs that *do* exist in the macOS 15 SDK, at least 
> as of beta 6:
> 
> 1) It still thinks it's a 14.0 SDK:
> -------------------------------------------------------------------------
> /*
>   * if max OS not specified, assume larger of (10.15, min)
>   */
> #ifndef MAC_OS_X_VERSION_MAX_ALLOWED
>      #if MAC_OS_X_VERSION_MIN_REQUIRED > MAC_OS_VERSION_14_0
>          #define MAC_OS_X_VERSION_MAX_ALLOWED MAC_OS_X_VERSION_MIN_REQUIRED
>      #else
>          #define MAC_OS_X_VERSION_MAX_ALLOWED MAC_OS_VERSION_14_0
>      #endif
> #endif
> -------------------------------------------------------------------------
> Note that the comment is even more outdated than the code. :-)
> 
> 2) There are new functions for half-precision floats in 15.x, and their 
> prototypes are *unconditionally* included in math.h.  That means that 
> building anything that uses math.h with a compiler that doesn't provide 
> the _Float16 type gets fatal errors.  Availability attributes don't help 
> with this, since the declarations themselves are illegal without the type.
> Usually, things of this form have conditionals related to compiler 
> capabilities, but that's currently missing here, and the usual "define it 
> as empty" approach doesn't work with types.
> 
> Anyone with a paid developer account should feel free to file bugs about 
> those.  Those of us who don't pay Apple for the privilege of telling them 
> what they're doing wrong don't have that option.
> 
> On Fri, 16 Aug 2024, Mark E Anderson wrote:
> 
> > I do! I'll look into that. Yeah, I don't even have the 14 SDK on this machine since Xcode 15 won't run.
> 
> You don't need to *run* a version of Xcode just to extract an SDK from it. 
> Though in some cases you may trip over issues with the installer and/or 
> unarchiver.
> 
> Fred Wright
> 
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