On Wed, 28 May 2025, softworkz . wrote:
-----Original Message-----
From: ffmpeg-devel <ffmpeg-devel-boun...@ffmpeg.org> On Behalf Of
Martin Storsjö
Sent: Mittwoch, 28. Mai 2025 07:55
To: FFmpeg development discussions and patches <ffmpeg-
de...@ffmpeg.org>
Subject: Re: [FFmpeg-devel] Building for Mac x86 with GCC & NASM
These warnings appeared since the new linker in Xcode 15.0, 1.5 years
ago.
I'm not aware of a flag for silencing these warnings; the only way I'm
aware of is to force using the old linker by passing -Wl,-ld_classic.
Thanks for the tip. It works to the extent that it prevents those
messages from appearing and make completes successfully. But almost
all (4724) fate tests are failing, haven't tried to trace it down.
That sounds odd; it works fine for me (on an arm64 mac).
However this flag isn't a great solution either, since Xcode 16, the
linker warns "ld: warning: -ld_classic is deprecated and will be removed
in a future release".
This led me to a reference indicating that YASM already does it right.
I tried to build with YASM instead. After disabling HEVC and VVC decoders
it ran almost to the end, but then it failed on tx_float:
Warning: libavcodec/x86/vp9lpf.o
skipping strip -x
Warning: libavcodec/x86/vp9lpf.o
libavutil/x86/tx_float.asm:1936: error:
Warning: (PFA_15_FN:21) expression syntax
Warning: error
libavutil/x86/tx_float.asm:1937: error: (PFA_15_FN:21)
Warning: expression syntax error
make: *** [libavutil/x86/tx_float.o] Error
I don't know whether it can be disabled in some way as it appears to be
a prerequisite for many codecs and filters?
Besides that, I suppose that YASM isn't a good idea at all, right?`
I'm not really familiar with the situation about x86 assemblers, but afaik
yasm is much further behind on many other aspects.
From a different angle - what do you think would be the most useful
Mac build for Patchwork CI in general?
The available runners are macos 13, 14 and 15 - all x86, there's no
arm yet.
And would it be better to use Clang like in case of your FATE machines?
I would recommend you to use the Apple provided Clang rather than GCC.
// Martin
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