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Bug#1117390: cppgir: FTBFS: ERROR could not find GIR for Gst-1.0

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On Wed, 19 Nov 2025 at 11:14:32 +0100, Santiago Vila wrote:
>I confirm that this is fixed in the above version.
>
>And yes, it was not obvious what actually failed. However, I can see
>what failed when I look at a build log made on a machine with 1 CPU,
>the relevant part of the build log seems to be like this:
>
>make  -f CMakeFiles/wrappers.dir/build.make CMakeFiles/wrappers.dir/build
>make[3]: Entering directory '/<<PKGBUILDDIR>>/obj-x86_64-linux-gnu'
>[ 40%] Generating wrapper code for: GObject-2.0;Gio-2.0;Gst-1.0;Gtk-3.0
>cd /<<PKGBUILDDIR>> && /<<PKGBUILDDIR>>/obj-x86_64-linux-gnu/cppgir --class --class-full --ignore data/cppgir.ignore:d
>ata/cppgir_unix.ignore --output /<<PKGBUILDDIR>>/debian/tmp GObject-2.0 Gio-2.0 Gst-1.0 Gtk-3.0
>ERROR could not find GIR for Gst-1.0

I wonder why this wasn't visible in the log you initially linked, which 
was presumably from a machine with more than one CPU? I would expect 
that a parallel build could interleave warning/error output from more 
than one process, but I would also have expected the error to turn up 
*somewhere* in the log.

"ERROR could not find GIR for Gst-1.0" looks like a symptom of #1060906 
(older cppgir didn't look at the Debian-specific multiarch GIR XML 
search paths), combined with libgstreamer1.0-dev (>= 1.26.6-2) 
installing Gst-1.0.gir into the multiarch GIR XML directory so that it 
can be Multi-Arch: same again. So it does make sense that this newer 
version, which searches all the right directories, fixes the FTBFS.

     smcv

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Bug#1117390: cppgir: FTBFS: dh_auto_build: error: cd obj-x86_64-linux-gnu && make -j2 INSTALL="install --strip-program=true" VERBOSE=1 returned exit code 2 Santiago Vila <sanvila@debian.org> - 2025-11-19 11:20 +0100
  Processed: Re: Bug#1117390: cppgir: FTBFS: dh_auto_build: error:  cd obj-x86_64-linux-gnu && make -j2 INSTALL="install --strip-program=true"  VERBOSE=1 returned exit code 2 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-11-19 11:20 +0100
  Bug#1117390: cppgir: FTBFS: ERROR could not find GIR for Gst-1.0 Simon McVittie <smcv@debian.org> - 2025-11-19 14:20 +0100
    Bug#1117390: cppgir: FTBFS: ERROR could not find GIR for Gst-1.0 Santiago Vila <sanvila@debian.org> - 2025-11-19 15:30 +0100

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