Details
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Bug
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Resolution: Invalid
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P1: Critical
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None
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5.15.0
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None
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Linux/X11
Description
Using Qt5.15.0 and trying to compile the following hello world fails with g++ versions 6, 7 and 8 but works with g++ version 9 and 10. Same hello world with Qt5.14.2 works for all compilers mention above. Below is a log of first trying all compilers with Qt5.15.0 followed by Qt5.14.2.
Using Qt5.15.0
$ cat bug.cpp #include <QtWidgets/QApplication> #include <QtWidgets/QPushButton> int main( int argc, char **argv ) { QApplication a( argc, argv ); QPushButton hello( "Hello world!", 0 ); hello.resize( 100, 30 ); hello.show(); return a.exec(); } * Test compilation with g++-6 $ qmake --version QMake version 3.1 Using Qt version 5.15.0 in /usr/lib $ g++-6 --version g++-6 (GCC) 6.5.0 Copyright (C) 2017 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ g++-6 -c -pipe -O2 -Wall -Wextra -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -I. -isystem /usr/include/qt -isystem /usr/include/qt/QtWidgets -isystem /usr/include/qt/QtGui -isystem /usr/include/qt/QtCore -I. -I/usr/lib/qt/mkspecs/linux-g++ -o bug.o bug.cpp $ g++-6 -Wl,-O1 -o qtbug bug.o /usr/lib/libQt5Widgets.so /usr/lib/libQt5Gui.so /usr/lib/libQt5Core.so -lGL -lpthread ld: /usr/lib/libQt5Widgets.so: undefined reference to `std::pmr::monotonic_buffer_resource::~monotonic_buffer_resource()@GLIBCXX_3.4.28' ld: /usr/lib/libQt5Widgets.so: undefined reference to `vtable for std::pmr::monotonic_buffer_resource@GLIBCXX_3.4.28' ld: /usr/lib/libQt5Widgets.so: undefined reference to `std::pmr::get_default_resource()@GLIBCXX_3.4.26' ld: /usr/lib/libQt5Widgets.so: undefined reference to `std::pmr::monotonic_buffer_resource::_M_new_buffer(unsigned long, unsigned long)@GLIBCXX_3.4.26' * Test compilation with g++-7 $ qmake --version QMake version 3.1 Using Qt version 5.15.0 in /usr/lib $ g++-7 --version g++-7 (GCC) 7.5.0 Copyright (C) 2017 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ g++-7 -c -pipe -O2 -Wall -Wextra -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -I. -isystem /usr/include/qt -isystem /usr/include/qt/QtWidgets -isystem /usr/include/qt/QtGui -isystem /usr/include/qt/QtCore -I. -I/usr/lib/qt/mkspecs/linux-g++ -o bug.o bug.cpp $ g++-7 -Wl,-O1 -o qtbug bug.o /usr/lib/libQt5Widgets.so /usr/lib/libQt5Gui.so /usr/lib/libQt5Core.so -lGL -lpthread /usr/bin/ld: /usr/lib/libQt5Widgets.so: undefined reference to `std::pmr::monotonic_buffer_resource::~monotonic_buffer_resource()@GLIBCXX_3.4.28' /usr/bin/ld: /usr/lib/libQt5Widgets.so: undefined reference to `vtable for std::pmr::monotonic_buffer_resource@GLIBCXX_3.4.28' /usr/bin/ld: /usr/lib/libQt5Widgets.so: undefined reference to `std::pmr::get_default_resource()@GLIBCXX_3.4.26' /usr/bin/ld: /usr/lib/libQt5Widgets.so: undefined reference to `std::pmr::monotonic_buffer_resource::_M_new_buffer(unsigned long, unsigned long)@GLIBCXX_3.4.26' collect2: error: ld returned 1 exit status * Test compilation with g++-8 $ qmake --version QMake version 3.1 Using Qt version 5.15.0 in /usr/lib $ g++-8 --version g++-8 (GCC) 8.4.0 Copyright (C) 2018 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ g++-8 -c -pipe -O2 -Wall -Wextra -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -I. -isystem /usr/include/qt -isystem /usr/include/qt/QtWidgets -isystem /usr/include/qt/QtGui -isystem /usr/include/qt/QtCore -I. -I/usr/lib/qt/mkspecs/linux-g++ -o bug.o bug.cpp $ g++-8 -Wl,-O1 -o qtbug bug.o /usr/lib/libQt5Widgets.so /usr/lib/libQt5Gui.so /usr/lib/libQt5Core.so -lGL -lpthread /usr/bin/ld: /usr/lib/libQt5Widgets.so: undefined reference to `std::pmr::monotonic_buffer_resource::~monotonic_buffer_resource()@GLIBCXX_3.4.28' /usr/bin/ld: /usr/lib/libQt5Widgets.so: undefined reference to `vtable for std::pmr::monotonic_buffer_resource@GLIBCXX_3.4.28' /usr/bin/ld: /usr/lib/libQt5Widgets.so: undefined reference to `std::pmr::get_default_resource()@GLIBCXX_3.4.26' /usr/bin/ld: /usr/lib/libQt5Widgets.so: undefined reference to `std::pmr::monotonic_buffer_resource::_M_new_buffer(unsigned long, unsigned long)@GLIBCXX_3.4.26' collect2: error: ld returned 1 exit status * Test compilation with g++-9 $ qmake --version QMake version 3.1 Using Qt version 5.15.0 in /usr/lib $ g++-9 --version g++-9 (Arch Linux 9.3.0-2) 9.3.0 Copyright (C) 2019 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ g++-9 -c -pipe -O2 -Wall -Wextra -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -I. -isystem /usr/include/qt -isystem /usr/include/qt/QtWidgets -isystem /usr/include/qt/QtGui -isystem /usr/include/qt/QtCore -I. -I/usr/lib/qt/mkspecs/linux-g++ -o bug.o bug.cpp $ g++-9 -Wl,-O1 -o qtbug bug.o /usr/lib/libQt5Widgets.so /usr/lib/libQt5Gui.so /usr/lib/libQt5Core.so -lGL -lpthread * Test compilation with g++ $ qmake --version QMake version 3.1 Using Qt version 5.15.0 in /usr/lib $ g++ --version g++ (GCC) 10.1.0 Copyright (C) 2020 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ g++ -c -pipe -O2 -Wall -Wextra -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -I. -isystem /usr/include/qt -isystem /usr/include/qt/QtWidgets -isystem /usr/include/qt/QtGui -isystem /usr/include/qt/QtCore -I. -I/usr/lib/qt/mkspecs/linux-g++ -o bug.o bug.cpp $ g++ -Wl,-O1 -o qtbug bug.o /usr/lib/libQt5Widgets.so /usr/lib/libQt5Gui.so /usr/lib/libQt5Core.so -lGL -lpthread
Using Qt5.14.2
$ cat bug.cpp #include <QtWidgets/QApplication> #include <QtWidgets/QPushButton> int main( int argc, char **argv ) { QApplication a( argc, argv ); QPushButton hello( "Hello world!", 0 ); hello.resize( 100, 30 ); hello.show(); return a.exec(); } * Test compilation with g++-6 $ qmake --version QMake version 3.1 Using Qt version 5.14.2 in /usr/lib $ g++-6 --version g++-6 (GCC) 6.5.0 Copyright (C) 2017 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ g++-6 -c -pipe -O2 -Wall -Wextra -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -I. -isystem /usr/include/qt -isystem /usr/include/qt/QtWidgets -isystem /usr/include/qt/QtGui -isystem /usr/include/qt/QtCore -I. -I/usr/lib/qt/mkspecs/linux-g++ -o bug.o bug.cpp $ g++-6 -Wl,-O1 -o qtbug bug.o /usr/lib/libQt5Widgets.so /usr/lib/libQt5Gui.so /usr/lib/libQt5Core.so -lGL -lpthread * Test compilation with g++-7 $ qmake --version QMake version 3.1 Using Qt version 5.14.2 in /usr/lib $ g++-7 --version g++-7 (GCC) 7.5.0 Copyright (C) 2017 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ g++-7 -c -pipe -O2 -Wall -Wextra -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -I. -isystem /usr/include/qt -isystem /usr/include/qt/QtWidgets -isystem /usr/include/qt/QtGui -isystem /usr/include/qt/QtCore -I. -I/usr/lib/qt/mkspecs/linux-g++ -o bug.o bug.cpp $ g++-7 -Wl,-O1 -o qtbug bug.o /usr/lib/libQt5Widgets.so /usr/lib/libQt5Gui.so /usr/lib/libQt5Core.so -lGL -lpthread * Test compilation with g++-8 $ qmake --version QMake version 3.1 Using Qt version 5.14.2 in /usr/lib $ g++-8 --version g++-8 (GCC) 8.4.0 Copyright (C) 2018 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ g++-8 -c -pipe -O2 -Wall -Wextra -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -I. -isystem /usr/include/qt -isystem /usr/include/qt/QtWidgets -isystem /usr/include/qt/QtGui -isystem /usr/include/qt/QtCore -I. -I/usr/lib/qt/mkspecs/linux-g++ -o bug.o bug.cpp $ g++-8 -Wl,-O1 -o qtbug bug.o /usr/lib/libQt5Widgets.so /usr/lib/libQt5Gui.so /usr/lib/libQt5Core.so -lGL -lpthread * Test compilation with g++-9 $ qmake --version QMake version 3.1 Using Qt version 5.14.2 in /usr/lib $ g++-9 --version g++-9 (Arch Linux 9.3.0-2) 9.3.0 Copyright (C) 2019 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ g++-9 -c -pipe -O2 -Wall -Wextra -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -I. -isystem /usr/include/qt -isystem /usr/include/qt/QtWidgets -isystem /usr/include/qt/QtGui -isystem /usr/include/qt/QtCore -I. -I/usr/lib/qt/mkspecs/linux-g++ -o bug.o bug.cpp $ g++-9 -Wl,-O1 -o qtbug bug.o /usr/lib/libQt5Widgets.so /usr/lib/libQt5Gui.so /usr/lib/libQt5Core.so -lGL -lpthread * Test compilation with g++ $ qmake --version QMake version 3.1 Using Qt version 5.14.2 in /usr/lib $ g++ --version g++ (GCC) 10.1.0 Copyright (C) 2020 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. $ g++ -c -pipe -O2 -Wall -Wextra -D_REENTRANT -fPIC -DQT_NO_DEBUG -DQT_WIDGETS_LIB -DQT_GUI_LIB -DQT_CORE_LIB -I. -I. -isystem /usr/include/qt -isystem /usr/include/qt/QtWidgets -isystem /usr/include/qt/QtGui -isystem /usr/include/qt/QtCore -I. -I/usr/lib/qt/mkspecs/linux-g++ -o bug.o bug.cpp $ g++ -Wl,-O1 -o qtbug bug.o /usr/lib/libQt5Widgets.so /usr/lib/libQt5Gui.so /usr/lib/libQt5Core.so -lGL -lpthread