[MacPorts] #67459: mame: upstream issue tracking for 0.252 and later: 3rd-party component bgfx broken for 10.14/10.15

[MacPorts]

#67459: mame: upstream issue tracking for 0.252 and later: 3rd-party component bgfx
broken for 10.14/10.15
----------------------+----------------------
  Reporter:  mascguy  |      Owner:  mascguy
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.8.1
Resolution:           |   Keywords:
      Port:  mame     |
----------------------+----------------------
Description changed by mascguy:

Old description:

> Presently Mame is pinned at 0.251 for 10.14 and later, due to breakage
> within 3rd-party component BGFX. Specifically, certain pixel formats are
> unavailable in releases prior to Big Sur, even though upstream still
> officially supports 10.14 and later.
>
> For 10.14:
>
> ```
> renderer_mtl.mm:: error: unknown type name 'MTLTextureSwizzleChannels'
> renderer_mtl.mm:: error: use of undeclared identifier
> 'MTLTextureSwizzleAlpha'
> renderer_mtl.mm:: error: use of undeclared identifier
> 'MTLTextureSwizzleBlue'
> renderer_mtl.mm:: error: use of undeclared identifier
> 'MTLTextureSwizzleGreen'
> renderer_mtl.mm:: error: use of undeclared identifier
> 'MTLTextureSwizzleRed'
> ```
>
> For 10.15:
>
> ```
> renderer_mtl.mm: error: 'MTLPixelFormatABGR4Unorm' is unavailable: not
> available on macOS
> renderer_mtl.mm: error: 'MTLPixelFormatB5G6R5Unorm' is unavailable: not
> available on macOS
> renderer_mtl.mm: error: 'MTLPixelFormatBGR5A1Unorm' is unavailable: not
> available on macOS
> ```
>
> This issue has officially been reported to upstream, and is being tracked
> by:
>
> * [https://github.com/mamedev/mame/issues/11245 11254 - bgfx: metal
> renderer: pixel-format build errors for macOS 10.14 and 10.15]
>
> While the issue would be easy enough to patch - it's limited to two
> source files - there's a possibility that it will cause downstream
> compilation (or runtime) issues with Mame. So rather than simply blindly
> patch it, the goal is to engage with upstream, and validate that we won't
> have other unexpected problems.

New description:

 Presently Mame is pinned at 0.251 for 10.14 and later, due to breakage
 within 3rd-party component BGFX. Specifically, certain pixel formats are
 unavailable in releases prior to Big Sur, even though upstream still
 officially supports 10.14 and later.

 For 10.14:

 {{{
 renderer_mtl.mm:: error: unknown type name 'MTLTextureSwizzleChannels'
 renderer_mtl.mm:: error: use of undeclared identifier
 'MTLTextureSwizzleAlpha'
 renderer_mtl.mm:: error: use of undeclared identifier
 'MTLTextureSwizzleBlue'
 renderer_mtl.mm:: error: use of undeclared identifier
 'MTLTextureSwizzleGreen'
 renderer_mtl.mm:: error: use of undeclared identifier
 'MTLTextureSwizzleRed'
 }}}

 For 10.15:

 {{{
 renderer_mtl.mm: error: 'MTLPixelFormatABGR4Unorm' is unavailable: not
 available on macOS
 renderer_mtl.mm: error: 'MTLPixelFormatB5G6R5Unorm' is unavailable: not
 available on macOS
 renderer_mtl.mm: error: 'MTLPixelFormatBGR5A1Unorm' is unavailable: not
 available on macOS
 }}}

 This issue has officially been reported to upstream, and is being tracked
 by:

 * [https://github.com/mamedev/mame/issues/11245 11254 - bgfx: metal
 renderer: pixel-format build errors for macOS 10.14 and 10.15]

 While the issue would be easy enough to patch - it's limited to two source
 files - there's a possibility that it will cause downstream compilation
 (or runtime) issues with Mame. So rather than simply blindly patch it, the
 goal is to engage with upstream, and validate that we won't have other
 unexpected problems.

--

-- 
Ticket URL: <https://trac.macports.org/ticket/67459#comment:1>
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