[FFmpeg-devel] Building for Mac x86 with GCC & NASM

[softworkz .]

> -----Original Message-----
> From: ffmpeg-devel <ffmpeg-devel-bounces at ffmpeg.org> On Behalf Of
> Christopher Snowhill
> Sent: Mittwoch, 28. Mai 2025 09:40
> To: FFmpeg development discussions and patches <ffmpeg-
> devel at ffmpeg.org>
> Subject: Re: [FFmpeg-devel] Building for Mac x86 with GCC & NASM
> 
> On Tue May 27, 2025 at 10:54 PM PDT, Martin Storsjö wrote:
> > On Tue, 27 May 2025, softworkz . wrote:
> >
> >> Hi,
> >>
> >> I have an issue with the CI builds for Mac in a way that it prints
> >> tons of lines like this:
> >>
> >> ld: warning: no platform load command found in
> 'libavcodec/libavcodec.a[1008](sao_10bit.o)', assuming: macOS
> >> ld: warning: no platform load command found in
> 'libavcodec/libavcodec.a[1009](hpeldsp.o)', assuming: macOS
> >> ld: warning: no platform load command found in
> 'libavcodec/libavcodec.a[1011](huffyuvdsp.o)', assuming: macOS
> >> ld: warning: no platform load command found in
> 'libavcodec/libavcodec.a[1013](huffyuvencdsp.o)', assuming: macOS
> >>
> >>
> >> These are all about X86AM output. I've had those lines for all .o
> files
> >> before and was able to get rid of them by adding flags like below.
> >>
> >> Does anybody know how I can avoid those lines for the X86ASM output
> as well?
> >> (don't know much about building for Apple)
> >
> > 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.
> >
> > These warnings would go away of nasm could produce the right
> platform load
> > commands; this is https://github.com/netwide-assembler/nasm/pull/13,
> but
> > there hasn't been much progress on it. (And since the macOS
> ecossytem
> > mostly is moving away from x86, I guess there's progressively less
> effort
> > on it as well.)
> >
> > // Martin
> 
> I do wonder how this is going, since I have never noticed such
> messages
> while building for x86 from an ARM machine. I continue to support x86
> machines all the way down to the minimum spec of current Xcode, which
> is
> 10.13.

I don't think you can cross-compile x86 assembler on an arm machine.

Best regards
sw