Andrea, the message you pointed out is just a warning, i.e. the one below:
1052:/home/paz/cinelerra-gg-qt6/cinelerra-5.1/guicast/errorbox.h:35:14: note:   by ‘void ErrorBox::create_objects(const char*)’
several of these warnings are also in what Andrew is referring to as the "classic Cinelerra" (gg 5.1).

Looking for "Error " and "error:" in the log instead shows:
make[2]: *** [cinelerra/CMakeFiles/cin.dir/build.make:2621: cinelerra/CMakeFiles/cin.dir/ffmpeg.C.o] Error 1
...
 /home/paz/cinelerra-gg-qt6/cinelerra-5.1/cinelerra/ffmpeg.C:1991:31: error: ‘const AVCodec’ {aka ‘const struct AVCodec’} has no member named ‘supported_samplerates’
 1991 |         const int *p = codec->supported_samplerates;
      |                               ^~~~~~~~~~~~~~~~~~~~~
It looks like you must be running FFmpeg 9.x which is good but the modifications needed for the deletion of the deprecated "const AVCodec" have to be propagated to cinelerra/ffmpeg.C, cinelerra/fileffmpeg.C, and cinelerra/fileac3.C (although I did not see a fileac3.C error message in your build log).

Modifications needed to correct the "error:" messages and hopefully get you further along can be found in:
https://git.cinelerra-gg.org/?p=goodguy/cinelerra.git;a=commit;h=e0902d80ebfe17601b0673cea78824bb4d948887
but I will add a Mantis Bug report for this and provide a patch there if I can get it done tonight yet.
 
Thank you for providing the log file and Please keep them coming! 

On Thu, Oct 15, 2026 at 1:11 PM Andrea paz via Cin <cin@lists.cinelerra-gg.org> wrote:
You're right—the PATH was missing. After adding it to /usr/include, the compilation started. It stopped after 1–2 minutes with the following message:

1052:/home/paz/cinelerra-gg-qt6/cinelerra-5.1/guicast/errorbox.h:35:14: note:   by ‘void ErrorBox::create_objects(const char*)’


Looking at .../cinelerra-5.1/guicast/errorbox.h on line 35, I find the following line:

void create_objects(const char *text);


But I don't know how to proceed from here. I'm attaching the build.log file.
https://paste.c-net.org/TurksKeith
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