Re: [FFmpeg-devel] commits ecee6af8bd and 4ac869ca2a break build for macOS

From: Christopher Degawa <ccom@randomderp.com>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Cc: "Helmut K. C. Tessarek" <tessarek@evermeet.cx>
Subject: Re: [FFmpeg-devel] commits ecee6af8bd and 4ac869ca2a break build for macOS
Date: Mon, 20 Dec 2021 19:18:24 -0600
Message-ID: <CABDPGrxJFU=3urEmoTLeH7R7nhasT0jOJLZKGq693A7NuSbLsQ@mail.gmail.com> (raw)
In-Reply-To: <CAK=uwuzkqFWCXwk=5T8+kVYcihYtcaEc_P6-1DKCKfCeRuy4=w@mail.gmail.com>

On Mon, Dec 20, 2021 at 6:55 PM Aman Karmani <ffmpeg@tmm1.net> wrote:

> On Mon, Dec 20, 2021 at 4:52 PM Helmut K. C. Tessarek <
> tessarek@evermeet.cx>
> wrote:
>
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA512
> >
> >
> >
> > On 2021-12-20 19:38, Aman Karmani wrote:
> > > Could you share the output of `xcrun metal -v`
> >
> > $ xcrun metal -v
> > Apple LLVM version 902.9 (metalfe-902.9.61)
> > Target: air64-apple-darwin18.7.0
> > Thread model: posix
> > InstalledDir:
> >
> >
> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain
> > /usr/metal/ios/bin
> >
>
> I am able to get the ios binary too, but only when I request is explicitly
> as follows:
>
> $ xcrun -sdk $(xcodebuild -sdk iphoneos -version Path) metal -v
>
> Apple metal version 31001.325 (metalfe-31001.325)
> Target: air64-apple-darwin20.6.0
> Thread model: posix
> InstalledDir:
>
> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/metal/ios/bin
>
>

Running `xcrun -sdk $(xcodebuild -sdk macosx -version Path) metal
libavfilter/metal/vf_yadif_videotoolbox.metal -o
libavfilter/metal/vf_yadif_videotoolbox.metal.air` does indeed compile
properly and properly shows macos

xcrun -sdk $(xcodebuild -sdk macosx -version Path) metal -v
Apple LLVM version 31001.143 (metalfe-31001.143)
Target: air64-apple-darwin19.6.0
Thread model: posix
InstalledDir:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/metal/macos/bin

and I can indeed have FFmpeg configure and make with `./configure
--metalcc="xcrun -sdk $(xcodebuild -sdk macosx -version Path) metal"`, but
that would sorta ruin the whole idea of being able to simply clone and
./configure and make.

I tried looking online, and I guess maybe it's not something often asked as
I could not find relevant results to how to set the default xcrun sdk, so
I'm not sure how to make that -sdk flag apply to all xcruns regardless of
configure flags
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