check failed: build of ffmpeg failed

[mikeswanson]

Everything seemed to work until the ffmpeg build. The end of my build-ffmpeg.log file:

duplicate symbol '_av1_sgr_params' in:
    /Users/michael/Dev/ffmpeg-compile/tool/lib/libSvtAv1Enc.a[48](selfguided_neon.c.o)
    /tmp/lto.o
ld: 1 duplicate symbols
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [ffprobe_g] Error 1
make: *** Waiting for unfinished jobs....
duplicate symbol '_av1_sgr_params' in:
    /Users/michael/Dev/ffmpeg-compile/tool/lib/libSvtAv1Enc.a[48](selfguided_neon.c.o)
    /tmp/lto.o
ld: 1 duplicate symbols
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [ffplay_g] Error 1
duplicate symbol '_dec_init' in:
    /Users/michael/Dev/ffmpeg-compile/ffmpeg/ffmpeg/fftools/ffmpeg_dec.o
    /Users/michael/Dev/ffmpeg-compile/tool/lib/libbluray.a[28](libbluray_la-dec.o)
duplicate symbol '_av1_sgr_params' in:
    /Users/michael/Dev/ffmpeg-compile/tool/lib/libSvtAv1Enc.a[48](selfguided_neon.c.o)
    /tmp/lto.o
ld: 2 duplicate symbols
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [ffmpeg_g] Error 1
rm libavfilter/metal/vf_yadif_videotoolbox.metal.air libavfilter/metal/vf_yadif_videotoolbox.metallib libavfilter/metal/vf_yadif_videotoolbox.metallib.c
+ checkStatus 2 'build of ffmpeg failed'
+ '[' 2 -ne 0 ']'
+ echo 'check failed: build of ffmpeg failed'
check failed: build of ffmpeg failed
+ exit 1

[Vargol]

Xcode 15 strikes again, it looks like Apple have decided that duplicate symbols should fail their linker, and I can't see a flag to work around it, and reverting to classic behaviour is doing the same.

No real fixes, so the only what I can see to fix this ATM is remove the --enable-libsvtav1 and --enable-libbluray options from build-ffmpeg.sh

I can try raising errors with the STV-AV1 team as they also work with the libaom and I've already had work with them to get rid of duplicate symbols before. The one has in libbluray and ffmpeg may be trickier as the vlc team seem to ignore administrator emails for their mailing list so don't allow new people so it may be the ffmpeg team that need to sort it and they are quite slow to respond to issues sometimes.

[mikeswanson]

Thanks. That's actually what I ended up doing. The tests fail, but oh well.

Thank you for your work!

[Vargol]

The svt-av1 issue raised as
https://gitlab.com/AOMediaCodec/SVT-AV1/-/issues/2162

Someone else has raised the libbluray issue, which is a good job as is seems joining the VLC gitlab is as gated as there mailing lists. The ffmpeg team threw it over the fence to libbluray.

[Vargol]

SVT-AV1 should be back working again (as in it works for me :-) )

[Vargol]

No action from the vlc team with regard to libbluray, so I hacked itv tp compile and created a patch.
No idea if libbluray still works as I've got no idea if I've got any non-encrypted blu-ray discs, but its does at least
recognises the encrypted ones.

[ThijmenDam]

Hi @Vargol, thanks for all your work.

I receive the same (or a similar?) error, i.e. duplicate symbol '_dec_init':

MAN	doc/ffmpeg-all.1
LD	ffmpeg_g
LD	ffprobe_g
ld: warning: ignoring duplicate libraries: '-lbrotlicommon', '-lbrotlidec', '-lbz2', '-lc++', '-ldl', '-lfreetype', '-liconv', '-lm', '-logg', '-lpng16', '-lpthread', '-lsharpyuv', '-lvorbis', '-lvpx', '-lwebp', '-lz'
ld: warning: ignoring duplicate libraries: '-lbrotlicommon', '-lbrotlidec', '-lbz2', '-lc++', '-ldl', '-lfreetype', '-liconv', '-lm', '-logg', '-lpng16', '-lpthread', '-lsharpyuv', '-lvorbis', '-lvpx', '-lwebp', '-lz'
duplicate symbol '_dec_init' in:
    /Users/thijmen/repositories/ffmpeg-apple-arm64-build/ffmpeg-compile/ffmpeg/ffmpeg/fftools/ffmpeg_dec.o
    /Users/thijmen/repositories/ffmpeg-apple-arm64-build/ffmpeg-compile/tool/lib/libbluray.a[28](libbluray_la-dec.o)
ld: 1 duplicate symbols
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [ffmpeg_g] Error 1
make: *** Waiting for unfinished jobs....
+ checkStatus 2 'build of ffmpeg failed'
+ '[' 2 -ne 0 ']'
+ echo 'check failed: build of ffmpeg failed'
check failed: build of ffmpeg failed
+ exit 1

Is there anything I can do about this right now? If this requires a separate issue, please let me know!

M1 Mac Mini on Sonoma 14.4.1.

[Vargol]

Did you download the release ?
Download the repository zip instead, big green "Code" button, download zip option at the bottom of the pop up menu.
That should work.

[ThijmenDam]

@Vargol I cloned the most recent version of this repository using the Git CLI. That should give me the most recent version, right?

[Vargol]

Yes that should work, assuming you didn't clone a branch.

Check build/build-libbluray.sh has the following line

git apply $1/libblu_dec_init.patch

I'm running a fresh build from a clone to check.

[ThijmenDam]

@Vargol yes, build/build-libbluray.sh contains

git apply $1/libblu_dec_init.patch

on line 46.

[Vargol]

and thats the version thats not working for you, as that is the latest version that has just successfully built for me.

compile ffmpeg
took 182s
compilation finished successfully
took 918s

bundle result
  adding: ffmpeg (deflated 58%)
  adding: ffprobe (deflated 58%)

run tests
tests executed successfully

[ThijmenDam]

Yes, the latest version has not been working for me. I double checked that I indeed had the latest version, and tried to build twice as well. Could I help by providing additional information?

[Vargol]

Sure, first I need your build-libbluray.log from for build directory.
I can only think the patch needed to modify libbluray to fix the error has failed on your system for some reason.

[Vargol]

Also can you check in the build directory
go to tool/lib

and try running the following command

nm libbluray.a | grep dec_init

which should return somethin like

000000000000025c T _lbr_dec_init
                 U _lbr_dec_init

if the 'lbr_' on the front of dec_init is missing thats more proof the patch is not applying.

[ThijmenDam]

@Vargol indeed, the patch doesn't apply:

❯ nm libbluray.a | grep dec_init
000000000000025c T _dec_init
                 U _dec_init

I'm certain I have the latest version of your repository; I even deleted the repo folder and cloned it again. Do you have any clue on what might be going wrong? Perhaps caching-related issues?