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Bug 768342 - kde-apps/kwave-20.12.2 with gcc-11: /usr/include/qt5/QtCore/qfloat16.h:300:7: error: ‘numeric_limits’ is not a class template
Summary: kde-apps/kwave-20.12.2 with gcc-11: /usr/include/qt5/QtCore/qfloat16.h:300:7:...
Status: RESOLVED FIXED
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo KDE team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks: gcc-11
  Show dependency tree
 
Reported: 2021-02-02 10:10 UTC by Kobboi
Modified: 2021-05-20 22:23 UTC (History)
0 users

See Also:
Package list:
Runtime testing required: ---


Attachments
build.log.gz (build.log.gz,20.09 KB, application/octet-stream)
2021-02-02 10:11 UTC, Kobboi
Details

Note You need to log in before you can comment on or make changes to this bug.
Description Kobboi 2021-02-02 10:10:08 UTC
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)> {};
      |                            ^

(...)

Reproducible: Always
Comment 1 Kobboi 2021-02-02 10:10:44 UTC
Portage 3.0.14 (python 3.8.7-final-0, !../../var/db/repos/kobboi-linux/profiles/kobboi/samsonov, gcc-11.0.0, glibc-2.32-r7, 5.4.93 x86_64)
=================================================================
System uname: Linux-5.4.93-x86_64-Intel-R-_Core-TM-_i7-6700_CPU_@_3.40GHz-with-glibc2.2.5
KiB Mem:    32776900 total,   8887672 free
KiB Swap:          0 total,         0 free
Timestamp of repository gentoo: Tue, 02 Feb 2021 07:47:43 +0000
Head commit of repository gentoo: 0ffca56b72b2b78da6a1c023fe86bf922291dbeb

Timestamp of repository brother-overlay: Sat, 23 Jan 2021 10:41:31 +0000
Head commit of repository brother-overlay: fe35aa6732459e8430d9b65f4ef6782d4dd5dde9

Timestamp of repository gitlab: Wed, 27 Jan 2021 16:32:34 +0000
Head commit of repository gitlab: f003d9ba47a403085e2c15bf64f9575493188310

Head commit of repository kobboi-linux: 558c07acd2347251a904c9c5f61655f5822101eb

Timestamp of repository steam-overlay: Sat, 23 Jan 2021 10:41:07 +0000
Head commit of repository steam-overlay: d4fc70b86dcf24462ef302663199c26de4be50cd

sh bash 5.1_p4
ld GNU ld (Gentoo 2.35.1 p2) 2.35.1
distcc 3.3.3 x86_64-pc-linux-gnu [disabled]
ccache version 4.1 [disabled]
app-shells/bash:          5.1_p4::gentoo
dev-java/java-config:     2.3.1::gentoo
dev-lang/perl:            5.32.0-r1::gentoo
dev-lang/python:          2.7.18-r6::gentoo, 3.7.9-r2::gentoo, 3.8.7-r1::gentoo, 3.9.1-r1::gentoo
dev-util/ccache:          4.1::gentoo
dev-util/cmake:           3.19.4::gentoo
sys-apps/baselayout:      2.7-r1::gentoo
sys-apps/sandbox:         2.20::gentoo
sys-devel/autoconf:       2.13-r1::gentoo, 2.69-r5::gentoo
sys-devel/automake:       1.13.4-r2::gentoo, 1.15.1-r2::gentoo, 1.16.3-r1::gentoo
sys-devel/binutils:       2.35.1-r1::gentoo
sys-devel/gcc:            9.3.0-r2::gentoo, 10.2.0-r5::gentoo, 11.0.0_pre9999::gentoo
sys-devel/gcc-config:     2.3.3::gentoo
sys-devel/libtool:        2.4.6-r6::gentoo
sys-devel/make:           4.3::gentoo
sys-kernel/linux-headers: 5.10::gentoo (virtual/os-headers)
sys-libs/glibc:           2.32-r7::gentoo
Repositories:

gentoo
    location: /var/db/repos/gentoo
    sync-type: git
    sync-uri: https://github.com/gentoo-mirror/gentoo.git
    priority: -1000

brother-overlay
    location: /var/db/repos/brother-overlay
    sync-type: git
    sync-uri: https://github.com/gentoo-mirror/brother-overlay.git
    masters: gentoo

gitlab
    location: /var/db/repos/gitlab
    sync-type: git
    sync-uri: https://github.com/gentoo-mirror/gitlab.git
    masters: gentoo

kobboi-linux
    location: /var/db/repos/kobboi-linux
    sync-type: git
    sync-uri: https://github.com/kobboi/kobboi-linux.git
    masters: gentoo

steam-overlay
    location: /var/db/repos/steam-overlay
    sync-type: git
    sync-uri: https://github.com/gentoo-mirror/steam-overlay.git
    masters: gentoo

Installed sets: @kobboi-all
ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -march=x86-64 -pipe -fomit-frame-pointer -g -ggdb"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/maven-bin-3.6/conf"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php7.4/ext-active/ /etc/php/apache2-php8.0/ext-active/ /etc/php/cgi-php7.4/ext-active/ /etc/php/cgi-php8.0/ext-active/ /etc/php/cli-php7.4/ext-active/ /etc/php/cli-php8.0/ext-active/ /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CXXFLAGS="-O2 -march=x86-64 -pipe -fomit-frame-pointer -g -ggdb"
DISTDIR="/usr/portage/distfiles"
ENV_UNSET="CARGO_HOME DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN GOPATH PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs buildpkg compressdebug config-protect-if-modified distlocks ebuild-locks fixlafiles installsources ipc-sandbox merge-sync multilib-strict network-sandbox news parallel-install pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms splitdebug strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="ftp://kobboi-linux:*password*@10.8.0.1/2020.11"
INSTALL_MASK="/usr/src/debug /usr/lib/debug"
LANG="en_US.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
PKGDIR="/usr/portage/packages"
PORTAGE_BINHOST="ftp://kobboi-linux:*password*@10.8.0.1/2020.11/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git"
PORTAGE_TMPDIR="/var/tmp"
USE="X a52 aac acl acpi alsa amd64 avahi berkdb bluetooth bzip2 cairo cdda cdr cli colord crypt cups dbus dist-kernel djvu dri dts dvd dvdr eds egl emboss encode evo exif facedetect ffmpeg flac fluidsynth fortran frei0r gdbm gif glade gles gles2 gnome gnome-keyring gnome-online-accounts gpm gstreamer gtk gtk3 gtkstyle gui iconv icu introspection ipv6 jpeg ladspa lcms libass libglvnd libnotify libsecret libtirpc lv2 lz4 lzma lzo mad midi mng modemmanager mono mp3 mp4 mpeg mtp multilib nautilus ncurses networkmanager nls nptl ogg opencv opengl openmp opus pam pango pcre pdf png policykit ppds pulseaudio qt5 readline samba screencast sdl seccomp smartcard smp spell split-usr ssl startup-notification svg sysprof systemd tcpd tiff truetype udev udisks unicode upower usb v4l vaapi vdpau vorbis wayland wxwidgets x264 xattr xcb xml xv xvid zeroconf zlib" ABI_X86="64" ADA_TARGET="gnat_2018" ALSA_CARDS="hda-intel ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="keyboard mouse synaptics libinput" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LUA_SINGLE_TARGET="lua5-1" LUA_TARGETS="lua5-1" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-3 php7-4" POSTGRES_TARGETS="postgres10 postgres11" PYTHON_SINGLE_TARGET="python3_8" PYTHON_TARGETS="python3_8" RUBY_TARGETS="ruby26" USERLAND="GNU" VIDEO_CARDS="vesa radeon nvidia intel amdgpu dummy fbdev nouveau radeonsi v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, LC_ALL, LINGUAS, MAKEOPTS, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
Comment 2 Kobboi 2021-02-02 10:11:12 UTC
Created attachment 685542 [details]
build.log.gz
Comment 3 Andreas Sturmlechner gentoo-dev 2021-02-02 10:27:50 UTC
Please rebuild qtcore and try again.
Comment 4 Kobboi 2021-02-02 10:47:02 UTC
(In reply to Andreas Sturmlechner from comment #3)
> Please rebuild qtcore and try again.

Not sure what you expected to happen :) 

Problem persists.
Comment 5 Kobboi 2021-02-02 10:52:33 UTC
Let me know if there is anything else I should try.
Comment 6 Andreas Sturmlechner gentoo-dev 2021-02-02 10:53:14 UTC
(In reply to Kobboi from comment #4)
> (In reply to Andreas Sturmlechner from comment #3)
> > Please rebuild qtcore and try again.
> 
> Not sure what you expected to happen :) 
> 
> Problem persists.

I expected you may have built Qt 5.15.2 before it contained a GCC-11 buildfix, and this header it is failing at is part of that patch.

Did you check it is exactly the same error?
Comment 7 Andreas Sturmlechner gentoo-dev 2021-02-02 10:56:17 UTC
You can try with this patch:

https://src.fedoraproject.org/rpms/kwave/blob/master/f/kwave-gcc11.patch
Comment 8 Kobboi 2021-02-02 10:56:51 UTC
(In reply to Andreas Sturmlechner from comment #6)
 
> I expected you may have built Qt 5.15.2 before it contained a GCC-11
> buildfix, and this header it is failing at is part of that patch.
> 
> Did you check it is exactly the same error?


Yes: same error, same location:

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>
      |       ^~~~~~~~~~~~~~

[I] dev-qt/qtcore
     Available versions:  (5) 5.15.2-r2(5/5.15.2)^t{tbz2}
       {debug icu old-kernel systemd test KERNEL="linux"}
     Installed versions:  5.15.2-r2(5/5.15.2)^t{tbz2}(11:43:57 02/02/21)(icu systemd -debug -old-kernel -test KERNEL="linux")
     Homepage:            https://www.qt.io/
     Description:         Cross-platform application development framework
Comment 9 Kobboi 2021-02-02 11:04:46 UTC
(In reply to Andreas Sturmlechner from comment #7)
> You can try with this patch:
> 
> https://src.fedoraproject.org/rpms/kwave/blob/master/f/kwave-gcc11.patch

Patch works nicely. Do you take it from here or do I submit a PR?
Comment 10 Andreas Sturmlechner gentoo-dev 2021-02-02 11:05:35 UTC
Please report it upstream, since Fedora do not seem to care to.
Comment 11 Andreas Sturmlechner gentoo-dev 2021-02-12 22:07:17 UTC
Please rebuild dev-qt/qtcore-5.15.2-r2 and re-open if this can be reproduced afterwards, see also bug 768354.
Comment 12 Kobboi 2021-02-13 09:33:27 UTC
Still happening.

Latest repo = Timestamp of repository gentoo: Sat, 13 Feb 2021 08:22:48 +0000
Head commit of repository gentoo: eed2c80b636d83ffd008443e923a6239384cb482

Latest gcc-11 = gcc (Gentoo 11.0.0_pre9999 p6, commit fab095dad5e1970ceae598ec9c98b07cce3eb599) 11.0.0 20210213 (experimental)

dev-qt/qtcore-qt-5.15.2-r2 rebuilt just now

(and I continuously run rebuilds of everything)
Comment 13 Larry the Git Cow gentoo-dev 2021-02-13 11:38:16 UTC
The bug has been closed via the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=92d54be896563102786238893a9c645b8bdb43ef

commit 92d54be896563102786238893a9c645b8bdb43ef
Author:     Andreas Sturmlechner <asturm@gentoo.org>
AuthorDate: 2021-02-13 11:37:36 +0000
Commit:     Andreas Sturmlechner <asturm@gentoo.org>
CommitDate: 2021-02-13 11:37:59 +0000

    dev-qt/qtcore: Fix headers for revdeps building with GCC-11
    
    Closes: https://bugs.gentoo.org/768342
    Closes: https://bugs.gentoo.org/768354
    Package-Manager: Portage-3.0.14, Repoman-3.0.2
    Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>

 dev-qt/qtcore/files/qtcore-5.15.2-gcc11.patch | 38 +++++++++++++++++++++++++++
 dev-qt/qtcore/qtcore-5.15.2-r2.ebuild         |  1 +
 2 files changed, 39 insertions(+)