Package: src:kde-gtk-config
Version: 4:6.3.0-1
Severity: important
Tags: sid forky
User: debian-...@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/kde-gtk-config_6.3.0-1_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

[...]
/usr/include/x86_64-linux-gnu/qt6/QtCore/qvariant.h:142:70: note: declared here
  142 |     enum QT_DEPRECATED_VERSION_X_6_0("Use QMetaType::Type instead.") 
Type
      |                                                                      
^~~~
/build/reproducible-path/kde-gtk-config-6.3.0/kded/config_editor/gtk2.cpp:23:31:
 warning: ‘QVariant::Type QVariant::type() const’ is deprecated: Use typeId() 
or metaType(). [-Wdeprecated-declarations]
   23 |     } else if (paramValue.type() == QVariant::Type::Bool) {
      |                ~~~~~~~~~~~~~~~^~
/usr/include/x86_64-linux-gnu/qt6/QtCore/qvariant.h:432:10: note: declared here
  432 |     Type type() const
      |          ^~~~
/build/reproducible-path/kde-gtk-config-6.3.0/kded/config_editor/gtk2.cpp:23:53:
 warning: ‘Type’ is deprecated: Use QMetaType::Type instead. 
[-Wdeprecated-declarations]
   23 |     } else if (paramValue.type() == QVariant::Type::Bool) {
      |                                                     ^~~~
/usr/include/x86_64-linux-gnu/qt6/QtCore/qvariant.h:142:70: note: declared here
  142 |     enum QT_DEPRECATED_VERSION_X_6_0("Use QMetaType::Type instead.") 
Type
      |                                                                      
^~~~
[ 64%] Building CXX object 
kconf_update/CMakeFiles/gtk_theme.dir/__/kded/config_editor/xsettings.cpp.o
cd 
/build/reproducible-path/kde-gtk-config-6.3.0/obj-x86_64-linux-gnu/kconf_update 
&& /usr/bin/c++ -DKGUIADDONS_LIB -DQT_CORE_LIB -DQT_GUI_LIB -DQT_NO_DEBUG 
-DQT_NO_SIGNALS_SLOTS_KEYWORDS -D_GNU_SOURCE -D_LARGEFILE64_SOURCE 
-I/build/reproducible-path/kde-gtk-config-6.3.0/obj-x86_64-linux-gnu/kconf_update
 -I/build/reproducible-path/kde-gtk-config-6.3.0/kconf_update 
-I/build/reproducible-path/kde-gtk-config-6.3.0/obj-x86_64-linux-gnu/kconf_update/gtk_theme_autogen/include
 -I/build/reproducible-path/kde-gtk-config-6.3.0/kconf_update/../kded -isystem 
/usr/include/x86_64-linux-gnu/qt6/QtCore -isystem 
/usr/include/x86_64-linux-gnu/qt6 -isystem 
/usr/lib/x86_64-linux-gnu/qt6/mkspecs/linux-g++ -isystem 
/usr/include/KF6/KConfig -isystem /usr/include/KF6/KConfigCore -isystem 
/usr/include/KF6/KGuiAddons -isystem /usr/include/x86_64-linux-gnu/qt6/QtGui 
-isystem /usr/include/glib-2.0 -isystem 
/usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /usr/include/sysprof-6 
-isystem /usr/include/libmount 
 -isystem /usr/include/blkid -g -O2 
-ffile-prefix-map=/build/reproducible-path/kde-gtk-config-6.3.0=. 
-fstack-protector-strong -fstack-clash-protection -Wformat 
-Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 
-fno-operator-names -fno-exceptions -Wall -Wextra -Wcast-align 
-Wchar-subscripts -Wformat-security -Wno-long-long -Wpointer-arith -Wundef 
-Wnon-virtual-dtor -Woverloaded-virtual -Werror=return-type -Werror=init-self 
-Wvla -Wdate-time -Wsuggest-override -Wlogical-op -std=gnu++20 
-fvisibility=hidden -fvisibility-inlines-hidden -pthread -MD -MT 
kconf_update/CMakeFiles/gtk_theme.dir/__/kded/config_editor/xsettings.cpp.o -MF 
CMakeFiles/gtk_theme.dir/__/kded/config_editor/xsettings.cpp.o.d -o 
CMakeFiles/gtk_theme.dir/__/kded/config_editor/xsettings.cpp.o -c 
/build/reproducible-path/kde-gtk-config-6.3.0/kded/config_editor/xsettings.cpp
[ 66%] Linking CXX static library ../../lib/libKWinBridge.a
cd 
/build/reproducible-path/kde-gtk-config-6.3.0/obj-x86_64-linux-gnu/kded/kwin_bridge
 && /usr/bin/cmake -P CMakeFiles/KWinBridge.dir/cmake_clean_target.cmake
cd 
/build/reproducible-path/kde-gtk-config-6.3.0/obj-x86_64-linux-gnu/kded/kwin_bridge
 && /usr/bin/cmake -E cmake_link_script CMakeFiles/KWinBridge.dir/link.txt 
--verbose=1
/usr/bin/ar qc ../../lib/libKWinBridge.a 
CMakeFiles/KWinBridge.dir/KWinBridge_autogen/mocs_compilation.cpp.o 
CMakeFiles/KWinBridge.dir/dummydecoratedclient.cpp.o 
CMakeFiles/KWinBridge.dir/dummydecorationbridge.cpp.o 
CMakeFiles/KWinBridge.dir/dummydecorationsettings.cpp.o 
CMakeFiles/KWinBridge.dir/decorationpalette.cpp.o 
CMakeFiles/KWinBridge.dir/decorationpainter.cpp.o 
CMakeFiles/KWinBridge.dir/auroraedecorationpainter.cpp.o 
CMakeFiles/KWinBridge.dir/standarddecorationpainter.cpp.o 
CMakeFiles/KWinBridge.dir/debug.cpp.o
/usr/bin/ranlib ../../lib/libKWinBridge.a
make[3]: Leaving directory 
'/build/reproducible-path/kde-gtk-config-6.3.0/obj-x86_64-linux-gnu'
[ 67%] Built target KWinBridge
/build/reproducible-path/kde-gtk-config-6.3.0/kded/config_editor/xsettings.cpp: 
In function ‘void {anonymous}::replaceValueInXSettingsdContents(QString&, const 
QString&, const QVariant&)’:
/build/reproducible-path/kde-gtk-config-6.3.0/kded/config_editor/xsettings.cpp:27:24:
 warning: ‘QVariant::Type QVariant::type() const’ is deprecated: Use typeId() 
or metaType(). [-Wdeprecated-declarations]
   27 |     if (paramValue.type() == QVariant::Type::String) {
      |         ~~~~~~~~~~~~~~~^~
In file included from /usr/include/x86_64-linux-gnu/qt6/QtCore/QVariant:1,
                 from 
/build/reproducible-path/kde-gtk-config-6.3.0/kded/config_editor/xsettings.h:7,
                 from 
/build/reproducible-path/kde-gtk-config-6.3.0/kded/config_editor/xsettings.cpp:4:
/usr/include/x86_64-linux-gnu/qt6/QtCore/qvariant.h:432:10: note: declared here
  432 |     Type type() const
      |          ^~~~
/build/reproducible-path/kde-gtk-config-6.3.0/kded/config_editor/xsettings.cpp:27:46:
 warning: ‘Type’ is deprecated: Use QMetaType::Type instead. 
[-Wdeprecated-declarations]
   27 |     if (paramValue.type() == QVariant::Type::String) {
      |                                              ^~~~~~
/usr/include/x86_64-linux-gnu/qt6/QtCore/qvariant.h:142:70: note: declared here
  142 |     enum QT_DEPRECATED_VERSION_X_6_0("Use QMetaType::Type instead.") 
Type
      |                                                                      
^~~~
/build/reproducible-path/kde-gtk-config-6.3.0/kded/config_editor/xsettings.cpp:29:31:
 warning: ‘QVariant::Type QVariant::type() const’ is deprecated: Use typeId() 
or metaType(). [-Wdeprecated-declarations]
   29 |     } else if (paramValue.type() == QVariant::Type::Bool) {
      |                ~~~~~~~~~~~~~~~^~
/usr/include/x86_64-linux-gnu/qt6/QtCore/qvariant.h:432:10: note: declared here
  432 |     Type type() const
      |          ^~~~
/build/reproducible-path/kde-gtk-config-6.3.0/kded/config_editor/xsettings.cpp:29:53:
 warning: ‘Type’ is deprecated: Use QMetaType::Type instead. 
[-Wdeprecated-declarations]
   29 |     } else if (paramValue.type() == QVariant::Type::Bool) {
      |                                                     ^~~~
/usr/include/x86_64-linux-gnu/qt6/QtCore/qvariant.h:142:70: note: declared here
  142 |     enum QT_DEPRECATED_VERSION_X_6_0("Use QMetaType::Type instead.") 
Type
      |                                                                      
^~~~
[ 69%] Linking CXX executable ../bin/gtk_theme
cd 
/build/reproducible-path/kde-gtk-config-6.3.0/obj-x86_64-linux-gnu/kconf_update 
&& /usr/bin/cmake -E cmake_link_script CMakeFiles/gtk_theme.dir/link.txt 
--verbose=1
/usr/bin/ld: 
CMakeFiles/gtk_theme.dir/__/kded/config_editor/gsettings.cpp.o:(.rodata+0x0): 
multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
CMakeFiles/gtk_theme.dir/gtktheme.cpp.o:(.rodata+0x0): first defined here
/usr/bin/ld: 
CMakeFiles/gtk_theme.dir/__/kded/config_editor/gtk2.cpp.o:(.rodata+0x0): 
multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
CMakeFiles/gtk_theme.dir/gtktheme.cpp.o:(.rodata+0x0): first defined here
/usr/bin/ld: 
CMakeFiles/gtk_theme.dir/__/kded/config_editor/settings_ini.cpp.o:(.rodata+0x0):
 multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
CMakeFiles/gtk_theme.dir/gtktheme.cpp.o:(.rodata+0x0): first defined here
/usr/bin/ld: 
CMakeFiles/gtk_theme.dir/__/kded/config_editor/utils.cpp.o:(.rodata+0x0): 
multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
CMakeFiles/gtk_theme.dir/gtktheme.cpp.o:(.rodata+0x0): first defined here
/usr/bin/ld: 
CMakeFiles/gtk_theme.dir/__/kded/config_editor/xsettings.cpp.o:(.rodata+0x0): 
multiple definition of `QtPrivate::IsFloatType_v<_Float16>'; 
CMakeFiles/gtk_theme.dir/gtktheme.cpp.o:(.rodata+0x0): first defined here
collect2: error: ld returned 1 exit status
/usr/bin/c++ -g -O2 
-ffile-prefix-map=/build/reproducible-path/kde-gtk-config-6.3.0=. 
-fstack-protector-strong -fstack-clash-protection -Wformat 
-Werror=format-security -fcf-protection -Wdate-time -D_FORTIFY_SOURCE=2 
-fno-operator-names -fno-exceptions -Wall -Wextra -Wcast-align 
-Wchar-subscripts -Wformat-security -Wno-long-long -Wpointer-arith -Wundef 
-Wnon-virtual-dtor -Woverloaded-virtual -Werror=return-type -Werror=init-self 
-Wvla -Wdate-time -Wsuggest-override -Wlogical-op -Wl,--enable-new-dtags 
-Wl,-z,relro -Wl,-z,now 
CMakeFiles/gtk_theme.dir/gtk_theme_autogen/mocs_compilation.cpp.o 
CMakeFiles/gtk_theme.dir/gtktheme.cpp.o 
CMakeFiles/gtk_theme.dir/__/kded/config_editor/gsettings.cpp.o 
CMakeFiles/gtk_theme.dir/__/kded/config_editor/gtk2.cpp.o 
CMakeFiles/gtk_theme.dir/__/kded/config_editor/settings_ini.cpp.o 
CMakeFiles/gtk_theme.dir/__/kded/config_editor/utils.cpp.o 
CMakeFiles/gtk_theme.dir/__/kded/config_editor/xsettings.cpp.o -o 
../bin/gtk_theme  /usr/lib/x86_64-linux-gnu/libKF6
 ConfigCore.so.6.10.0 /usr/lib/x86_64-linux-gnu/libKF6GuiAddons.so.6.10.0 
/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 
/usr/lib/x86_64-linux-gnu/libgio-2.0.so 
/usr/lib/x86_64-linux-gnu/libgobject-2.0.so 
/usr/lib/x86_64-linux-gnu/libglib-2.0.so
make[3]: *** [kconf_update/CMakeFiles/gtk_theme.dir/build.make:210: 
bin/gtk_theme] Error 1
make[3]: Leaving directory 
'/build/reproducible-path/kde-gtk-config-6.3.0/obj-x86_64-linux-gnu'
make[2]: *** [CMakeFiles/Makefile2:941: 
kconf_update/CMakeFiles/gtk_theme.dir/all] Error 2
make[2]: Leaving directory 
'/build/reproducible-path/kde-gtk-config-6.3.0/obj-x86_64-linux-gnu'
make[1]: *** [Makefile:149: all] Error 2
make[1]: Leaving directory 
'/build/reproducible-path/kde-gtk-config-6.3.0/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

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