https://bugs.kde.org/show_bug.cgi?id=432413

            Bug ID: 432413
           Summary: kwave-20.12.1 with gcc-11:
                    /usr/include/qt5/QtCore/qfloat16.h:300:7: error:
                    ‘numeric_limits’ is not a class template
           Product: kwave
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: thomas.eschenbac...@gmx.de
          Reporter: k...@lermytte.be
  Target Milestone: ---

FAILED: plugins/codec_wav/CMakeFiles/plugin_codec_wav.dir/WavDecoder.cpp.o 
/usr/bin/x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -DKCOREADDONS_LIB
-DKXMLGUI_NO_DEPRECATED -DQT_CONCURRENT_LIB -DQT_CORE_LIB -DQT_DBUS_LIB
-DQT_DEPRECATED_WARNINGS -DQT_GUI_LIB -DQT_NETWORK_LIB -DQT_NO_CAST_FROM_ASCII
-DQT_NO_CAST_TO_ASCII -DQT_NO_DEBUG -DQT_NO_URL_CAST_FROM_STRING
-DQT_USE_FAST_OPERATOR_PLUS -DQT_WIDGETS_LIB -DQT_XML_LIB -D_GNU_SOURCE
-D_LARGEFILE64_SOURCE -Dplugin_codec_wav_EXPORTS -Iplugins/codec_wav
-I/var/tmp/portage/kde-apps/kwave-20.12.1/work/kwave-20.12.1/plugins/codec_wav
-Iplugins/codec_wav/plugin_codec_wav_autogen/include
-I/var/tmp/portage/kde-apps/kwave-20.12.1/work/kwave-20.12.1 -I. -isystem
/usr/include/qt5 -isystem /usr/include/qt5/QtCore -isystem
/usr/lib64/qt5/mkspecs/linux-g++ -isystem /usr/include/qt5/QtConcurrent
-isystem /usr/include/qt5/QtWidgets -isystem /usr/include/qt5/QtGui -isystem
/usr/include/KF5/KConfigCore -isystem /usr/include/KF5 -isystem
/usr/include/KF5/KCoreAddons -isystem /usr/include/KF5/KI18n -isystem
/usr/include/KF5/KIconThemes -isystem /usr/include/KF5/KIOFileWidgets -isystem
/usr/include/KF5/KIOWidgets -isystem /usr/include/KF5/KIOGui -isystem
/usr/include/KF5/KIOCore -isystem /usr/include/KF5/KService -isystem
/usr/include/qt5/QtNetwork -isystem /usr/include/qt5/QtDBus -isystem
/usr/include/KF5/KWindowSystem -isystem /usr/include/KF5/KJobWidgets -isystem
/usr/include/KF5/KCompletion -isystem /usr/include/KF5/KWidgetsAddons -isystem
/usr/include/KF5/KBookmarks -isystem /usr/include/qt5/QtXml -isystem
/usr/include/KF5/KItemViews -isystem /usr/include/KF5/KXmlGui -isystem
/usr/include/KF5/KConfigWidgets -isystem /usr/include/KF5/KCodecs -isystem
/usr/include/KF5/KConfigGui -isystem /usr/include/KF5/KAuth -isystem
/usr/include/KF5/Solid -isystem /usr/include/KF5/KTextWidgets -isystem
/usr/include/KF5/SonnetUi  -DQT_NO_DEBUG -O2 -march=x86-64 -pipe
-fomit-frame-pointer -g -ggdb -fPIC --std=c++11 -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 -Wvla -Wdate-time -Wsuggest-override -Wlogical-op
-fdiagnostics-color=always -fPIC -fvisibility=hidden
-fvisibility-inlines-hidden -fPIC -std=gnu++11 -MD -MT
plugins/codec_wav/CMakeFiles/plugin_codec_wav.dir/WavDecoder.cpp.o -MF
plugins/codec_wav/CMakeFiles/plugin_codec_wav.dir/WavDecoder.cpp.o.d -o
plugins/codec_wav/CMakeFiles/plugin_codec_wav.dir/WavDecoder.cpp.o -c
/var/tmp/portage/kde-apps/kwave-20.12.1/work/kwave-20.12.1/plugins/codec_wav/WavDecoder.cpp
In file included from /usr/include/qt5/QtCore/qendian.h:44,
                 from /usr/include/qt5/QtCore/QtEndian:1,
                 from
/var/tmp/portage/kde-apps/kwave-20.12.1/work/kwave-20.12.1/plugins/codec_wav/WavDecoder.cpp:26:
/usr/include/qt5/QtCore/qfloat16.h:300:7: error: ‘numeric_limits’ is not a
class template
  300 | class numeric_limits<QT_PREPEND_NAMESPACE(qfloat16)> : public
numeric_limits<float>
      |       ^~~~~~~~~~~~~~
/usr/include/qt5/QtCore/qfloat16.h:300:77: error: expected template-name before
‘<’ token
  300 | class numeric_limits<QT_PREPEND_NAMESPACE(qfloat16)> : public
numeric_limits<float>
      |                                                                        
    ^
/usr/include/qt5/QtCore/qfloat16.h:300:77: error: expected ‘{’ before ‘<’ token
/usr/include/qt5/QtCore/qfloat16.h:344:18: error: ‘numeric_limits’ is not a
class template
  344 | template<> class numeric_limits<const QT_PREPEND_NAMESPACE(qfloat16)>
      |                  ^~~~~~~~~~~~~~
/usr/include/qt5/QtCore/qfloat16.h:344:69: error: ‘std::numeric_limits’ is not
a template
  344 | template<> class numeric_limits<const QT_PREPEND_NAMESPACE(qfloat16)>
      |                                                                     ^
/usr/include/qt5/QtCore/qfloat16.h:300:7: note: previous declaration here
  300 | class numeric_limits<QT_PREPEND_NAMESPACE(qfloat16)> : public
numeric_limits<float>
      |       ^~~~~~~~~~~~~~
/usr/include/qt5/QtCore/qfloat16.h:345:28: error: expected template-name before
‘<’ token
  345 |     : public numeric_limits<QT_PREPEND_NAMESPACE(qfloat16)> {};
      |                            ^
/usr/include/qt5/QtCore/qfloat16.h:346:18: error: ‘numeric_limits’ is not a
class template
  346 | template<> class numeric_limits<volatile
QT_PREPEND_NAMESPACE(qfloat16)>
      |                  ^~~~~~~~~~~~~~
/usr/include/qt5/QtCore/qfloat16.h:346:72: error: ‘std::numeric_limits’ is not
a template
  346 | template<> class numeric_limits<volatile
QT_PREPEND_NAMESPACE(qfloat16)>
      |                                                                       
^
/usr/include/qt5/QtCore/qfloat16.h:300:7: note: previous declaration here
  300 | class numeric_limits<QT_PREPEND_NAMESPACE(qfloat16)> : public
numeric_limits<float>
      |       ^~~~~~~~~~~~~~
/usr/include/qt5/QtCore/qfloat16.h:347:28: error: expected template-name before
‘<’ token
  347 |     : public numeric_limits<QT_PREPEND_NAMESPACE(qfloat16)> {};
      |                            ^
/usr/include/qt5/QtCore/qfloat16.h:348:18: error: ‘numeric_limits’ is not a
class template
  348 | template<> class numeric_limits<const volatile
QT_PREPEND_NAMESPACE(qfloat16)>
      |                  ^~~~~~~~~~~~~~
/usr/include/qt5/QtCore/qfloat16.h:348:78: error: ‘std::numeric_limits’ is not
a template
  348 | template<> class numeric_limits<const volatile
QT_PREPEND_NAMESPACE(qfloat16)>
      |                                                                        
     ^
/usr/include/qt5/QtCore/qfloat16.h:300:7: note: previous declaration here
  300 | class numeric_limits<QT_PREPEND_NAMESPACE(qfloat16)> : public
numeric_limits<float>
      |       ^~~~~~~~~~~~~~
/usr/include/qt5/QtCore/qfloat16.h:349:28: error: expected template-name before
‘<’ token
  349 |     : public numeric_limits<QT_PREPEND_NAMESPACE(qfloat16)> {};
      |                            ^

(...)

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