[FFmpeg-user] ERROR: libass >= 0.11.0 not found using pkg-config

[kozaick]

On Wed, 25 Dec 2024 22:34:45 +0100
Alexander Strasser via ffmpeg-user <ffmpeg-user at ffmpeg.org> wrote:

> On 2024-12-25 22:40 +0900, kozaick via ffmpeg-user wrote:
> > On Wed, 25 Dec 2024 21:07:44 +0900
> > Masaru Nomiya <nomiya at lake.dti.ne.jp> wrote:
> >
> [...]
> > > [kozaick] == kozaick via ffmpeg-user <ffmpeg-user at ffmpeg.org> has written:
> > >
> > > kozaick> Hello.
> > > kozaick> I am trying to compile ffmpeg with libass included for windows in ubuntu container (docker).
> > > kozaick> But I get an error when running the configure file.
> > > kozaick> To check, I placed the following command in the test_pkg_config() method of the configure file.
> > > kozaick> ---
> > > kozaick> echo “Checking package: $pkg_version”
> > > kozaick> pkg-config --exists --print-errors $pkg_version
> > > kozaick> echo “pkg-config exit code: $?”
> > > kozaick> ---
> > > kozaick> And display like this.
> > > kozaick> ---
> > > kozaick> Checking package: libass >= 0.11.0
> > > kozaick> pkg-config exit code: 0
> > > kozaick> ERROR: libass >= 0.11.0 not found using pkg-config
> > > [...]
> > >
> > > This says that libass.pc cannot be found. Your compilation method
> > > should have created libass.pc, but since /usr/local/lib/pkgconfig is
> > > missing, it is probably not installed.
> > >
> > > How about this?
> > >
> > >    1. $ sudo mkdir /usr/local/lib/pkgconfig
> > >
> > >    2. $ sudo cp somewhere/libass.pc /usr/local/lib/pkgconfig
> > >
> > > Best Reagrs & お休みなさい．
> > >
> > > ---
> > > ┏━━┓彡     Masaru Nomiya                   mail-to: nomiya @ lake.dti.ne.jp
> > > ┃＼／彡
> > > ┗━━┛       "Reading widely about things that don't seem immediately or
> > > 	       practically useful, in the hope that what you learn now may prove
> > > 	       meaningful later―that's pretty much the definition of a liberal-
> > > 	       arts education. Who knew that one of its best defenders would turn
> > > 	       out to be a computer scientist?"
> > >
> > >                     -- "What Does It Really Mean to Learn?" THE NEW YORKER --
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> > >
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> >
> > Thank you for quick reply.
> >
> > First, I forgot to mention that I have set the following my environment variables,
> > PKG_CONFIG_LIBDIR="/usr/local/x86_64-w64-mingw32/lib/pkgconfig:$PKG_CONFIG_LIBDIR”
> > PKG_CONFIG_PATH="/usr/local/x86_64-w64-mingw32/lib/pkgconfig:$PKG_CONFIG_PATH”
> > The setting you mentioned to put the .pc file in /usr/local/lib/pkgconfig does not work in my environment when I do this, and pkg-config returns 1.
> > I think the error is probably related to the configure file itself.?
> >
> > Second, I forgot to attach the config.log file, Sorry.
> > So, I attached this.
> > Thanks for let me know.
> >
> > Finally, My container envrioment is ubuntu 24.04 x86_64, ffmpeg release 7.1 from github, gcc 13, g++-mingw-w64-x86-64.
> >
> > ありがとう & お休みなさい．
> 
> I think this your problem at hand:
> 
>     WARNING: x86_64-w64-mingw32-pkg-config not found, library detection may fail.
> 
> You should also see it somewhere in the output, but I took this line
> from your `config.log`.
> 
> It means ffmpeg cannot run the pkg-config executable it expects to and
> instead uses `false` which will always give a negative (non-zero) exit
> status.
> 
> 
> Best regards,
>   Alexander
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Thank you very much for your reply.

It seems I was right on that your point.

I made the change using --pkg-config and ffmpeg was recognized.

I am so embarrassed...

Thank you all very much.