[This bug is NOT targeted to the upcoming trixie release]

Please keep this issue open in the bug tracker for the package it
was filed for.  If a fix in another package is required, please
file a bug for the other package (or clone), and add a block in this
package. Please keep the issue open until the package can be built in
a follow-up test rebuild.

The package fails to build in a test rebuild on at least amd64 with
gcc-15/g++-15, but succeeds to build with gcc-14/g++-14. The
severity of this report will be raised before the forky release.

The full build log can be found at:
http://qa-logs.debian.net/2025/02/16/amd64exp/sigil_2.2.1+dfsg-1_unstable_gccexp.log.gz
The last lines of the build log are at the end of this report.

To build with GCC 15, either set CC=gcc-15 CXX=g++-15 explicitly,
or install the gcc, g++, gfortran, ... packages from experimental.

  apt-get -t=experimental install g++

GCC 15 now defaults to the C23/C++23 standards, exposing many FTBFS.
Other Common build failures are new warnings resulting in build failures
with -Werror turned on, or new/dropped symbols in Debian symbols files.
For other C/C++ related build failures see the porting guide at
http://gcc.gnu.org/gcc-15/porting_to.html

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collect2: error: ld returned 1 exit status
bQt6WebEngineCore.so.6.7.2 /usr/lib/x86_64-linux-gnu/libQt6Quick.so.6.7.2 /usr/lib/x86_64-linux-gnu/libQt6QmlModels.so.6.7.2 /usr/lib/x86_64-linux-gnu/libQt6OpenGL.so.6.7.2 /usr/lib/x86_64-linux-gnu/libQt6WebChannel.so.6.7.2 /usr/lib/x86_64-linux-gnu/libQt6Qml.so.6.7.2 /usr/lib/x86_64-linux-gnu/libQt6Network.so.6.7.2 /usr/lib/x86_64-linux-gnu/libQt6QmlBuiltins.a /usr/lib/x86_64-linux-gnu/libQt6Positioning.so.6.7.2 /usr/lib/x86_64-linux-gnu/libQt6PrintSupport.so.6.7.2 /usr/lib/x86_64-linux-gnu/libQt6Widgets.so.6.7.2 /usr/lib/x86_64-linux-gnu/libQt6Gui.so.6.7.2 /usr/lib/x86_64-linux-gnu/libGLX.so /usr/lib/x86_64-linux-gnu/libOpenGL.so /usr/lib/x86_64-linux-gnu/libQt6Core.so.6.7.2
make[3]: *** [src/CMakeFiles/sigil.dir/build.make:4230: bin/sigil] Error 1
make[3]: Leaving directory '/build/reproducible-path/sigil-2.2.1+dfsg/obj-x86_64-linux-gnu'
make[2]: *** [CMakeFiles/Makefile2:296: src/CMakeFiles/sigil.dir/all] Error 2
make[2]: Leaving directory '/build/reproducible-path/sigil-2.2.1+dfsg/obj-x86_64-linux-gnu'
make[1]: *** [Makefile:139: all] Error 2
make[1]: Leaving directory '/build/reproducible-path/sigil-2.2.1+dfsg/obj-x86_64-linux-gnu'
dh_auto_build: error: cd obj-x86_64-linux-gnu && make -j8 "INSTALL=install --strip-program=true" VERBOSE=1 returned exit code 2
make: *** [debian/rules:7: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2