Bug#1096458: connectagram: ftbfs with GCC-15

[Matthias Klose]

Package: src:connectagram
Version: 1.3.6-1
Severity: important
Tags: sid forky
User: debian-gcc at lists.debian.org
Usertags: ftbfs-gcc-15

[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/connectagram_1.3.6-1_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

[...]
AutoRcc: Generating "SRC:/obj-x86_64-linux-gnu/connectagram_autogen/2SEMU33LXP/qrc_icons.cpp", because it doesn't exist, from "SRC:/icons/icons.qrc"
/usr/lib/qt6/libexec/rcc -name icons -o /build/reproducible-path/connectagram-1.3.6/obj-x86_64-linux-gnu/connectagram_autogen/2SEMU33LXP/qrc_icons.cpp /build/reproducible-path/connectagram-1.3.6/icons/icons.qrc
AutoRcc: Writing settings file "SRC:/obj-x86_64-linux-gnu/CMakeFiles/connectagram_autogen.dir/AutoRcc_icons_2SEMU33LXP_Used.txt"
cd /build/reproducible-path/connectagram-1.3.6/obj-x86_64-linux-gnu && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /build/reproducible-path/connectagram-1.3.6 /build/reproducible-path/connectagram-1.3.6 /build/reproducible-path/connectagram-1.3.6/obj-x86_64-linux-gnu /build/reproducible-path/connectagram-1.3.6/obj-x86_64-linux-gnu /build/reproducible-path/connectagram-1.3.6/obj-x86_64-linux-gnu/CMakeFiles/connectagram.dir/DependInfo.cmake "--color="
Dependencies file "connectagram_autogen/deps" is newer than depends file "/build/reproducible-path/connectagram-1.3.6/obj-x86_64-linux-gnu/CMakeFiles/connectagram.dir/compiler_depend.internal".
Consolidate compiler generated dependencies of target connectagram
make[3]: Leaving directory '/build/reproducible-path/connectagram-1.3.6/obj-x86_64-linux-gnu'
make  -f CMakeFiles/connectagram.dir/build.make CMakeFiles/connectagram.dir/build
make[3]: Entering directory '/build/reproducible-path/connectagram-1.3.6/obj-x86_64-linux-gnu'
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[ 75%] Building CXX object CMakeFiles/connectagram.dir/src/letter.cpp.o
[ 78%] Building CXX object CMakeFiles/connectagram.dir/src/board.cpp.o
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/usr/bin/ld: CMakeFiles/connectagram.dir/src/cell.cpp.o:(.rodata+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; CMakeFiles/connectagram.dir/connectagram_autogen/mocs_compilation.cpp.o:(.rodata+0x123c): first defined here
/usr/bin/ld: CMakeFiles/connectagram.dir/src/clock.cpp.o:(.rodata+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; CMakeFiles/connectagram.dir/connectagram_autogen/mocs_compilation.cpp.o:(.rodata+0x123c): first defined here
/usr/bin/ld: CMakeFiles/connectagram.dir/src/definitions.cpp.o:(.rodata+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; CMakeFiles/connectagram.dir/connectagram_autogen/mocs_compilation.cpp.o:(.rodata+0x123c): first defined here
/usr/bin/ld: CMakeFiles/connectagram.dir/src/letter.cpp.o:(.rodata+0x30): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; CMakeFiles/connectagram.dir/connectagram_autogen/mocs_compilation.cpp.o:(.rodata+0x123c): first defined here
/usr/bin/ld: CMakeFiles/connectagram.dir/src/locale_dialog.cpp.o:(.rodata+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; CMakeFiles/connectagram.dir/connectagram_autogen/mocs_compilation.cpp.o:(.rodata+0x123c): first defined here
/usr/bin/ld: CMakeFiles/connectagram.dir/src/main.cpp.o:(.rodata+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; CMakeFiles/connectagram.dir/connectagram_autogen/mocs_compilation.cpp.o:(.rodata+0x123c): first defined here
/usr/bin/ld: CMakeFiles/connectagram.dir/src/new_game_dialog.cpp.o:(.rodata+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; CMakeFiles/connectagram.dir/connectagram_autogen/mocs_compilation.cpp.o:(.rodata+0x123c): first defined here
/usr/bin/ld: CMakeFiles/connectagram.dir/src/pattern.cpp.o:(.rodata+0x44): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; CMakeFiles/connectagram.dir/connectagram_autogen/mocs_compilation.cpp.o:(.rodata+0x123c): first defined here
/usr/bin/ld: CMakeFiles/connectagram.dir/src/scores_dialog.cpp.o:(.rodata+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; CMakeFiles/connectagram.dir/connectagram_autogen/mocs_compilation.cpp.o:(.rodata+0x123c): first defined here
/usr/bin/ld: CMakeFiles/connectagram.dir/src/view.cpp.o:(.rodata+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; CMakeFiles/connectagram.dir/connectagram_autogen/mocs_compilation.cpp.o:(.rodata+0x123c): first defined here
/usr/bin/ld: CMakeFiles/connectagram.dir/src/window.cpp.o:(.rodata+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; CMakeFiles/connectagram.dir/connectagram_autogen/mocs_compilation.cpp.o:(.rodata+0x123c): first defined here
/usr/bin/ld: CMakeFiles/connectagram.dir/src/word.cpp.o:(.rodata+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; CMakeFiles/connectagram.dir/connectagram_autogen/mocs_compilation.cpp.o:(.rodata+0x123c): first defined here
/usr/bin/ld: CMakeFiles/connectagram.dir/src/wordlist.cpp.o:(.rodata+0x0): multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; CMakeFiles/connectagram.dir/connectagram_autogen/mocs_compilation.cpp.o:(.rodata+0x123c): first defined here
collect2: error: ld returned 1 exit status
/usr/bin/c++ -g -O2 -ffile-prefix-map=/build/reproducible-path/connectagram-1.3.6=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 -Wl,-z,relro -Wl,-z,now -Wl,--dependency-file=CMakeFiles/connectagram.dir/link.d CMakeFiles/connectagram.dir/connectagram_autogen/mocs_compilation.cpp.o CMakeFiles/connectagram.dir/src/board.cpp.o CMakeFiles/connectagram.dir/src/cell.cpp.o CMakeFiles/connectagram.dir/src/clock.cpp.o CMakeFiles/connectagram.dir/src/definitions.cpp.o CMakeFiles/connectagram.dir/src/letter.cpp.o CMakeFiles/connectagram.dir/src/locale_dialog.cpp.o CMakeFiles/connectagram.dir/src/main.cpp.o CMakeFiles/connectagram.dir/src/new_game_dialog.cpp.o CMakeFiles/connectagram.dir/src/pattern.cpp.o CMakeFiles/connectagram.dir/src/scores_dialog.cpp.o CMakeFiles/connectagram.dir/src/view.cpp.o CMakeFiles/connectagram.dir/src/window.cpp.o CMakeFiles/connectagram.dir/src/word.cpp.o CMakeFiles/connectagram.dir/src/wordlist.cpp.o CMakeFiles/connectagram.dir/connectagram_autogen/2SEMU33LXP/qrc_icons.cpp.o CMakeFiles/connectagram.dir/connectagram_autogen/2SEMU33LXP/qrc_icon.cpp.o -o connectagram  /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]: *** [CMakeFiles/connectagram.dir/build.make:477: connectagram] Error 1
make[3]: Leaving directory '/build/reproducible-path/connectagram-1.3.6/obj-x86_64-linux-gnu'
make[2]: *** [CMakeFiles/Makefile2:124: CMakeFiles/connectagram.dir/all] Error 2
make[2]: Leaving directory '/build/reproducible-path/connectagram-1.3.6/obj-x86_64-linux-gnu'
make[1]: *** [Makefile:139: all] Error 2
make[1]: Leaving directory '/build/reproducible-path/connectagram-1.3.6/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:9: binary] Error 25
dpkg-buildpackage: error: debian/rules binary subprocess returned exit status 2