Created attachment 886047 [details] emerge.info dev-qt/qtmultimedia-6.7.9999 fails to compile with libc++-19 (musl/clang/merged-usr) Steps to Reproduce: - Compile with `emerge =dev-qt/qtmultimedia-6.7.9999::gentoo` [105/369] /usr/lib/ccache/bin/clang++ -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_26 -DQGstreamerMediaPlugin_EXPORTS -DQT_CORE_LIB -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_UP_TO=0x050000 -DQT_EXPLICIT_QFILE_CONSTRUCTION_FROM_PATH -DQT_GUI_LIB -DQT_MULTIMEDIA_LIB -DQT_NETWORK_LIB -DQT_NO_AS_CONST -DQT_NO_AS_CONST=1 -DQT_NO_CONTEXTLESS_CONNECT=1 -DQT_NO_DEBUG -DQT_NO_EXCEPTIONS -DQT_NO_FOREACH -DQT_NO_FOREACH=1 -DQT_NO_JAVA_STYLE_ITERATORS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_QEXCHANGE -DQT_PLUGIN -DQT_USE_QSTRINGBUILDER -DQT_WARN_DEPRECATED_UP_TO=0x070000 -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999_build/src/plugins/multimedia/gstreamer/QGstreamerMediaPlugin_autogen/include -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999/src/plugins/multimedia/gstreamer -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999_build/src/plugins/multimedia/gstreamer -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999_build/include -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999/src/plugins/multimedia/gstreamer/audio -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999/src/plugins/multimedia/gstreamer/common -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999/src/plugins/multimedia/gstreamer/mediacapture -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999_build/src/multimedia -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999_build/include/QtMultimedia/6.7.0 -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999_build/include/QtMultimedia/6.7.0/QtMultimedia -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999_build/include/QtMultimedia -isystem /usr/include/qt6/QtCore/6.7.0 -isystem /usr/include/qt6/QtCore/6.7.0/QtCore -isystem /usr/include/qt6/QtCore -isystem /usr/include/qt6 -isystem /usr/lib/qt6/mkspecs/linux-clang -isystem /usr/include/qt6/QtGui/6.7.0 -isystem /usr/include/qt6/QtGui/6.7.0/QtGui -isystem /usr/include/qt6/QtGui -isystem /usr/include/qt6/QtNetwork -isystem /usr/include/gstreamer-1.0 -isystem /usr/include/glib-2.0 -isystem /usr/lib/glib-2.0/include -isystem /usr/lib/libffi/include -isystem /usr/include/orc-0.4 -isystem /usr/lib/gstreamer-1.0/include -O3 -pipe -march=native -mtune=native -D_FORTIFY_SOURCE=3 -g0 -stdlib=libc++ -std=c++17 -fPIC -fvisibility=hidden -fvisibility-inlines-hidden -Wall -Wextra -fno-exceptions -fPIC -pthread -MD -MT src/plugins/multimedia/gstreamer/CMakeFiles/QGstreamerMediaPlugin.dir/common/qgstvideobuffer.cpp.o -MF src/plugins/multimedia/gstreamer/CMakeFiles/QGstreamerMediaPlugin.dir/common/qgstvideobuffer.cpp.o.d -o src/plugins/multimedia/gstreamer/CMakeFiles/QGstreamerMediaPlugin.dir/common/qgstvideobuffer.cpp.o -c /var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999/src/plugins/multimedia/gstreamer/common/qgstvideobuffer.cpp samu: job failed with status 1: /usr/lib/ccache/bin/clang++ -DGLIB_VERSION_MIN_REQUIRED=GLIB_VERSION_2_26 -DQGstreamerMediaPlugin_EXPORTS -DQT_CORE_LIB -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_UP_TO=0x050000 -DQT_EXPLICIT_QFILE_CONSTRUCTION_FROM_PATH -DQT_GUI_LIB -DQT_MULTIMEDIA_LIB -DQT_NETWORK_LIB -DQT_NO_AS_CONST -DQT_NO_AS_CONST=1 -DQT_NO_CONTEXTLESS_CONNECT=1 -DQT_NO_DEBUG -DQT_NO_EXCEPTIONS -DQT_NO_FOREACH -DQT_NO_FOREACH=1 -DQT_NO_JAVA_STYLE_ITERATORS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_NO_QEXCHANGE -DQT_PLUGIN -DQT_USE_QSTRINGBUILDER -DQT_WARN_DEPRECATED_UP_TO=0x070000 -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999_build/src/plugins/multimedia/gstreamer/QGstreamerMediaPlugin_autogen/include -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999/src/plugins/multimedia/gstreamer -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999_build/src/plugins/multimedia/gstreamer -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999_build/include -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999/src/plugins/multimedia/gstreamer/audio -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999/src/plugins/multimedia/gstreamer/common -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999/src/plugins/multimedia/gstreamer/mediacapture -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999_build/src/multimedia -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999_build/include/QtMultimedia/6.7.0 -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999_build/include/QtMultimedia/6.7.0/QtMultimedia -I/var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999_build/include/QtMultimedia -isystem /usr/include/qt6/QtCore/6.7.0 -isystem /usr/include/qt6/QtCore/6.7.0/QtCore -isystem /usr/include/qt6/QtCore -isystem /usr/include/qt6 -isystem /usr/lib/qt6/mkspecs/linux-clang -isystem /usr/include/qt6/QtGui/6.7.0 -isystem /usr/include/qt6/QtGui/6.7.0/QtGui -isystem /usr/include/qt6/QtGui -isystem /usr/include/qt6/QtNetwork -isystem /usr/include/gstreamer-1.0 -isystem /usr/include/glib-2.0 -isystem /usr/lib/glib-2.0/include -isystem /usr/lib/libffi/include -isystem /usr/include/orc-0.4 -isystem /usr/lib/gstreamer-1.0/include -O3 -pipe -march=native -mtune=native -D_FORTIFY_SOURCE=3 -g0 -stdlib=libc++ -std=c++17 -fPIC -fvisibility=hidden -fvisibility-inlines-hidden -Wall -Wextra -fno-exceptions -fPIC -pthread -MD -MT src/plugins/multimedia/gstreamer/CMakeFiles/QGstreamerMediaPlugin.dir/common/qgstsubtitlesink.cpp.o -MF src/plugins/multimedia/gstreamer/CMakeFiles/QGstreamerMediaPlugin.dir/common/qgstsubtitlesink.cpp.o.d -o src/plugins/multimedia/gstreamer/CMakeFiles/QGstreamerMediaPlugin.dir/common/qgstsubtitlesink.cpp.o -c /var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999/src/plugins/multimedia/gstreamer/common/qgstsubtitlesink.cpp In file included from /var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999/src/plugins/multimedia/gstreamer/common/qgstsubtitlesink.cpp:4: In file included from /usr/include/qt6/QtCore/QDebug:1: In file included from /usr/include/qt6/QtCore/qdebug.h:13: In file included from /usr/include/qt6/QtCore/qtextstream.h:8: In file included from /usr/include/qt6/QtCore/qchar.h:656: In file included from /usr/include/qt6/QtCore/qstringview.h:8: In file included from /usr/include/qt6/QtCore/qbytearray.h:14: /usr/include/qt6/QtCore/qbytearrayview.h:70:27: error: implicit instantiation of undefined template 'std::char_traits<unsigned char>' 70 | return qsizetype(std::char_traits<Char>::length(data)); | ^ /usr/include/qt6/QtCore/qbytearrayview.h:152:39: note: in instantiation of function template specialization 'QtPrivate::lengthHelperPointer<unsigned char>' requested here 152 | data, data ? QtPrivate::lengthHelperPointer(data) : 0) {} | ^ /var/tmp/portage/dev-qt/qtmultimedia-6.7.9999/work/qtmultimedia-6.7.9999/src/plugins/multimedia/gstreamer/common/qgstsubtitlesink.cpp:148:38: note: in instantiation of function template specialization 'QByteArrayView::QByteArrayView<unsigned char *, true>' requested here 148 | subtitle = QString::fromUtf8(info.data); | ^ /usr/include/c++/v1/__string/char_traits.h:43:8: note: template is declared here 43 | struct char_traits; | ^ 1 error generated. samu: subcommand failed
Created attachment 886048 [details] build.log
Doesn't hurt to know, but unless clang19 release is close (i.e. -rc stage), and upstream Qt still hasn't fixed it then I'm not going to do anything about this downstream. Overall I'm currently more interested in issues with close-to-release clang18 than getting bugs about the far away clang19. May end up forgetting about this though, so feel free to ping if this becomes more urgent.
(In reply to Ionen Wolkens from comment #2) > Overall I'm currently more interested in issues with close-to-release > clang18 than getting bugs about the far away clang19. (by that I meant the whole stack, including libc++)
Well, looks like upstream fixed this for live ebuilds. Given bug was filed against 6.7.9999 I'll go ahead and close this, will be fixied in 6.6.3 and 6.7.0 which will both come long before libc++19 releases.
