[[qanda:topic_unsolved]] How to allow other developers(with no QT installed) to build and run a QT GUI project inside Visual Studio 2019?
[[qanda:topic_unsolved]] Can't Launch Designer w/ Anaconda 3
[[qanda:topic_unsolved]] Explanation configure options of QT for cross-compiling
Hi All,
that's my first topic here on the forum. I am trying to cross-compiling QT libraries 5.12.5 for my Raspberry PI 3B+ and then trying to cross-compiling a simply QT application.
First of all I configured, built and installed from sources the libraries specifying the following data:
./configure -release -opengl es2 -device linux-rasp-pi3-g++ -device-option CROSS_COMPILE=<path_to_compiler> -sysroot <path_to_sysroot> -opensource -confirm-license -skip qtwayland -skip qtlocation -skip qtscript -make libs -prefix /usr/local/qt5pi -extprefix /develop/raspberry/qt5pi -hostprefix /develop/raspberry/qt5pi -no-use-gold-linker -no-gbm
Sysroot has been downloaded from Raspi with rsync command.
From the output of the whole process I can see the bin libraries has been installed in /develop/raspberry/qt5pi as stated in -extprefix and -hostprefix.
Now I was wondering what is the role of -prefix path? If I am building everything on the host is that path important?
And, as soon as I will deploy my application to final platform, Do I have to copy the whole /develop/raspberry/qt5pi into /usr/local/qt5pi?
Thanks in advance,
Andrea
[[qanda:topic_unsolved]] Download speed is very low
Hi Team,
I'm trying to download Qt frame and chose the latest release. However the download speed is very low (about 100KBps). Any idea on how to fix this? I'm using Ubuntu 18.04.4 LTS OS. I tried by switching to the Open DNS but didn't help much.
Thanks,
Arun
[[qanda:topic_solved]] qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
[[qanda:topic_unsolved]] Silent installation of QT 4.6.2 on Windows 10
[[qanda:topic_unsolved]] ValueError: source code string cannot contain null bytes
El Qt 5.14.2 al instalar la version actual instala un Pyside2-uic que convierte los archivos *.py con una serie de candenas con bytes nulos esto lo experimente al convertir un archivo .ui que funcionaba y lo converti a python y me di la sorpresa que al comparar ambos archivos el nuevo era mas grande y no funcionaba me generaba el error del titulo ValueError: source code string cannot contain null bytes, por favor corregir la archivo PySide2-uic.exe
[[qanda:topic_unsolved]] How to properly build QT 64 bit version
[[qanda:topic_unsolved]] "Preparing meta information download" takes hours
Hello all
I'm trying to update my components, but the management tool is "preparing meta information download" hor hours, litrally. I have now waited for 50 minutes. Does anybody know why?
QT Creator v. 4.11.1, based on Qt 5.14.1 (MSVC 2017, 32 bit)
on Windows 7
Ove
[[qanda:topic_unsolved]] How to build and deploy the CMake project for debugging ?
Hey, I need to debug a plugin for simulator through qt creator. But I am confused with settings after importing CMakelists.txt into Qt Creator.
Any blog or documentation. I tried with the existing documentation, but I did not get What I needed. After all the necessary changes, deploy option is not enable, only I can see build option.
Thanks in advance
[[qanda:topic_unsolved]] QT Desinger doens't show GUI
[[qanda:topic_solved]] dll error when starting Qt Creator 4.8.2
[[qanda:topic_unsolved]] QT 5.14 build with MySQL Connector C 6.1 Error
Sorry about my English, but I met some error need to fix it.
I have built MySQL successfully with MySQL8.0 x64 with below step
1. run Qt 5.14.1 (MinGW 7.3.0 64-bit)
2. cd C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers
3. qmake -- MYSQL_INCDIR="C:/Program Files/MySQL/MySQL Server 8.0/include" MYSQL_LIBDIR="C:/Program Files/MySQL/MySQL Server 8.0/lib"
4. make sure "MySql .................................. yes"
5. mingw32-make
6. mingw32-make install
Then I used similar step to build MySQL Connector C 6.1 x86, like
1. run Qt 5.14.1 (MinGW 7.3.0 32-bit)
2. cd C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers
3. qmake -- MYSQL_INCDIR="C:/Program Files (x86)/MySQL/MySQL Connector C 6.1/include" MYSQL_LIBDIR="C:/Program Files (x86)/MySQL/MySQL Connector C 6.1/lib"
4. make sure "MySql .................................. yes"
5. mingw32-make
And I got lots of "undefined reference" from "qsql_mysql.cpp", How should I do? Thanks!
...
...
...
.obj/qsql_mysql.o:C:/Qt/Qt5.14.1/5.14.1/mingw73_64/include/QtCore/qarraydata.h:225: undefined reference to `_imp___ZN10QArrayData8allocateEjjj6QFlagsINS_16AllocationOptionEE'
.obj/qsql_mysql.o:C:/Qt/Qt5.14.1/5.14.1/mingw73_64/include/QtCore/qarraydata.h:225: more undefined references to `_imp___ZN10QArrayData8allocateEjjj6QFlagsINS_16AllocationOptionEE' follow
.obj/qsql_mysql.o:C:/Qt/Qt5.14.1/5.14.1/mingw73_64/include/QtCore/qarraydata.h:239: undefined reference to `_imp___ZN10QArrayData10deallocateEPS_jj'
.obj/qsql_mysql.o:C:/Qt/Qt5.14.1/5.14.1/mingw73_64/include/QtCore/qarraydata.h:225: undefined reference to `_imp___ZN10QArrayData8allocateEjjj6QFlagsINS_16AllocationOptionEE'
.obj/qsql_mysql.o:C:/Qt/Qt5.14.1/5.14.1/mingw73_64/include/QtCore/qarraydata.h:225: undefined reference to `_imp___ZN10QArrayData8allocateEjjj6QFlagsINS_16AllocationOptionEE'
.obj/qsql_mysql.o:C:/Qt/Qt5.14.1/5.14.1/mingw73_64/include/QtCore/qarraydata.h:225: undefined reference to `_imp___ZN10QArrayData8allocateEjjj6QFlagsINS_16AllocationOptionEE'
.obj/qsql_mysql.o:C:/Qt/Qt5.14.1/5.14.1/mingw73_64/include/QtCore/qarraydata.h:225: undefined reference to `_imp___ZN10QArrayData8allocateEjjj6QFlagsINS_16AllocationOptionEE'
.obj/qsql_mysql.o:C:/Qt/Qt5.14.1/5.14.1/mingw73_64/include/QtCore/qarraydata.h:225: undefined reference to `_imp___ZN10QArrayData8allocateEjjj6QFlagsINS_16AllocationOptionEE'
.obj/qsql_mysql.o:C:/Qt/Qt5.14.1/5.14.1/mingw73_64/include/QtCore/qarraydata.h:225: more undefined references to `_imp___ZN10QArrayData8allocateEjjj6QFlagsINS_16AllocationOptionEE' follow
.obj/qsql_mysql.o:C:/Qt/Qt5.14.1/5.14.1/mingw73_64/include/QtCore/qarraydata.h:239: undefined reference to `_imp___ZN10QArrayData10deallocateEPS_jj'
.obj/qsql_mysql.o:C:/Qt/Qt5.14.1/Tools/mingw730_32/lib/gcc/i686-w64-mingw32/7.3.0/include/c++/bits/atomic_base.h:396: undefined reference to `_imp___ZN10QArrayData11shared_nullE'
.obj/qsql_mysql.o:C:/Qt/Qt5.14.1/5.14.1/mingw73_64/include/QtCore/qarraydata.h:239: undefined reference to `_imp___ZN10QArrayData10deallocateEPS_jj'
.obj/qsql_mysql.o:qsql_mysql.cpp:(.rdata$_ZTV19QMYSQLResultPrivate[__ZTV19QMYSQLResultPrivate]+0x10): undefined reference to `QSqlResultPrivate::fieldSerial(int) const'
.obj/qsql_mysql.o:qsql_mysql.cpp:(.rdata$_ZTV12QMYSQLResult[__ZTV12QMYSQLResult]+0x14): undefined reference to `QSqlResult::setAt(int)'
.obj/qsql_mysql.o:qsql_mysql.cpp:(.rdata$_ZTV12QMYSQLResult[__ZTV12QMYSQLResult]+0x18): undefined reference to `QSqlResult::setActive(bool)'
.obj/qsql_mysql.o:qsql_mysql.cpp:(.rdata$_ZTV12QMYSQLResult[__ZTV12QMYSQLResult]+0x1c): undefined reference to `QSqlResult::setLastError(QSqlError const&)'
.obj/qsql_mysql.o:qsql_mysql.cpp:(.rdata$_ZTV12QMYSQLResult[__ZTV12QMYSQLResult]+0x20): undefined reference to `QSqlResult::setQuery(QString const&)'
.obj/qsql_mysql.o:qsql_mysql.cpp:(.rdata$_ZTV12QMYSQLResult[__ZTV12QMYSQLResult]+0x24): undefined reference to `QSqlResult::setSelect(bool)'
.obj/qsql_mysql.o:qsql_mysql.cpp:(.rdata$_ZTV12QMYSQLResult[__ZTV12QMYSQLResult]+0x28): undefined reference to `QSqlResult::setForwardOnly(bool)'
.obj/qsql_mysql.o:qsql_mysql.cpp:(.rdata$_ZTV12QMYSQLResult[__ZTV12QMYSQLResult]+0x34): undefined reference to `QSqlResult::savePrepare(QString const&)'
.obj/qsql_mysql.o:qsql_mysql.cpp:(.rdata$_ZTV12QMYSQLResult[__ZTV12QMYSQLResult]+0x38): undefined reference to `QSqlResult::bindValue(int, QVariant const&, QFlags<QSql::ParamTypeFlag>)'
.obj/qsql_mysql.o:qsql_mysql.cpp:(.rdata$_ZTV12QMYSQLResult[__ZTV12QMYSQLResult]+0x3c): undefined reference to `QSqlResult::bindValue(QString const&, QVariant const&, QFlags<QSql::ParamTypeFlag>)'
.obj/qsql_mysql.o:qsql_mysql.cpp:(.rdata$_ZTV12QMYSQLResult[__ZTV12QMYSQLResult]+0x54): undefined reference to `QSqlResult::fetchPrevious()'
.obj/qsql_mysql.o:qsql_mysql.cpp:(.rdata$_ZTV12QMYSQLResult[__ZTV12QMYSQLResult]+0x74): undefined reference to `QSqlResult::execBatch(bool)'
.obj/qsql_mysql.o:qsql_mysql.cpp:(.rdata$_ZTV12QMYSQLResult[__ZTV12QMYSQLResult]+0x7c): undefined reference to `QSqlResult::setNumericalPrecisionPolicy(QSql::NumericalPrecisionPolicy)'
.obj/main.o: In function `ZN18QMYSQLDriverPlugin6createERK7QString':
C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers\mysql/main.cpp:64: undefined reference to `_imp___ZNK7QStringeqE13QLatin1String'
.obj/main.o: In function `ZNK18QMYSQLDriverPlugin10metaObjectEv':
C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers\mysql/.moc/main.moc:78: undefined reference to `_imp___ZNK11QObjectData17dynamicMetaObjectEv'
.obj/main.o: In function `ZN18QMYSQLDriverPluginC2Ev':
C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers\mysql/main.cpp:58: undefined reference to `_imp___ZN16QSqlDriverPluginC2EP7QObject'
.obj/main.o:C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers\mysql/main.cpp:58: undefined reference to `_imp___ZN16QSqlDriverPluginC2EP7QObject'
.obj/main.o:C:/Qt/Qt5.14.1/5.14.1/mingw73_64/include/QtCore/qsharedpointer_impl.h:682: undefined reference to `_imp___ZN15QtSharedPointer20ExternalRefCountData9getAndRefEPK7QObject'
.obj/main.o: In function `ZN18QMYSQLDriverPlugin11qt_metacastEPKc':
C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers\mysql/.moc/main.moc:86: undefined reference to `_imp___ZN16QSqlDriverPlugin11qt_metacastEPKc'
.obj/main.o: In function `ZN18QMYSQLDriverPlugin11qt_metacallEN11QMetaObject4CallEiPPv':
C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers\mysql/.moc/main.moc:91: undefined reference to `_imp___ZN16QSqlDriverPlugin11qt_metacallEN11QMetaObject4CallEiPPv'
.obj/main.o: In function `ZN18QMYSQLDriverPluginD1Ev':
C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers\mysql/main.cpp:46: undefined reference to `_imp___ZN16QSqlDriverPluginD2Ev'
.obj/main.o:C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers\mysql/main.cpp:46: undefined reference to `_imp___ZN16QSqlDriverPluginD2Ev'
.obj/main.o: In function `_static_initialization_and_destruction_0':
C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers\mysql/.moc/main.moc:73: undefined reference to `_imp___ZN16QSqlDriverPlugin16staticMetaObjectE'
.obj/main.o:main.cpp:(.rdata$_ZTV18QMYSQLDriverPlugin[__ZTV18QMYSQLDriverPlugin]+0x1c): undefined reference to `QObject::event(QEvent*)'
.obj/main.o:main.cpp:(.rdata$_ZTV18QMYSQLDriverPlugin[__ZTV18QMYSQLDriverPlugin]+0x20): undefined reference to `QObject::eventFilter(QObject*, QEvent*)'
.obj/main.o:main.cpp:(.rdata$_ZTV18QMYSQLDriverPlugin[__ZTV18QMYSQLDriverPlugin]+0x24): undefined reference to `QObject::timerEvent(QTimerEvent*)'
.obj/main.o:main.cpp:(.rdata$_ZTV18QMYSQLDriverPlugin[__ZTV18QMYSQLDriverPlugin]+0x28): undefined reference to `QObject::childEvent(QChildEvent*)'
.obj/main.o:main.cpp:(.rdata$_ZTV18QMYSQLDriverPlugin[__ZTV18QMYSQLDriverPlugin]+0x2c): undefined reference to `QObject::customEvent(QEvent*)'
.obj/main.o:main.cpp:(.rdata$_ZTV18QMYSQLDriverPlugin[__ZTV18QMYSQLDriverPlugin]+0x30): undefined reference to `QObject::connectNotify(QMetaMethod const&)'
.obj/main.o:main.cpp:(.rdata$_ZTV18QMYSQLDriverPlugin[__ZTV18QMYSQLDriverPlugin]+0x34): undefined reference to `QObject::disconnectNotify(QMetaMethod const&)'
.obj/moc_qsql_mysql_p.o: In function `ZNK12QMYSQLDriver10metaObjectEv':
C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers\mysql/.moc/moc_qsql_mysql_p.cpp:78: undefined reference to `_imp___ZNK11QObjectData17dynamicMetaObjectEv'
.obj/moc_qsql_mysql_p.o: In function `ZN12QMYSQLDriver11qt_metacastEPKc':
C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers\mysql/.moc/moc_qsql_mysql_p.cpp:86: undefined reference to `_imp___ZN10QSqlDriver11qt_metacastEPKc'
.obj/moc_qsql_mysql_p.o: In function `ZN12QMYSQLDriver11qt_metacallEN11QMetaObject4CallEiPPv':
C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers\mysql/.moc/moc_qsql_mysql_p.cpp:91: undefined reference to `_imp___ZN10QSqlDriver11qt_metacallEN11QMetaObject4CallEiPPv'
.obj/moc_qsql_mysql_p.o: In function `_static_initialization_and_destruction_0':
C:\Qt\Qt5.14.1\5.14.1\Src\qtbase\src\plugins\sqldrivers\mysql/.moc/moc_qsql_mysql_p.cpp:73: undefined reference to `_imp___ZN10QSqlDriver16staticMetaObjectE'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x1c): undefined reference to `QObject::event(QEvent*)'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x20): undefined reference to `QObject::eventFilter(QObject*, QEvent*)'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x24): undefined reference to `QObject::timerEvent(QTimerEvent*)'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x28): undefined reference to `QObject::childEvent(QChildEvent*)'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x2c): undefined reference to `QObject::customEvent(QEvent*)'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x30): undefined reference to `QObject::connectNotify(QMetaMethod const&)'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x34): undefined reference to `QObject::disconnectNotify(QMetaMethod const&)'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x38): undefined reference to `QSqlDriver::isOpen() const'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x5c): undefined reference to `QSqlDriver::sqlStatement(QSqlDriver::StatementType, QString const&, QSqlRecord const&, bool) const'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x74): undefined reference to `QSqlDriver::subscribeToNotification(QString const&)'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x78): undefined reference to `QSqlDriver::unsubscribeFromNotification(QString const&)'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x7c): undefined reference to `QSqlDriver::subscribedToNotifications() const'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x84): undefined reference to `QSqlDriver::stripDelimiters(QString const&, QSqlDriver::IdentifierType) const'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x88): undefined reference to `QSqlDriver::cancelQuery()'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x8c): undefined reference to `QSqlDriver::setOpen(bool)'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x90): undefined reference to `QSqlDriver::setOpenError(bool)'
.obj/moc_qsql_mysql_p.o:moc_qsql_mysql_p.cpp:(.rdata$_ZTV12QMYSQLDriver[__ZTV12QMYSQLDriver]+0x94): undefined reference to `QSqlDriver::setLastError(QSqlError const&)'
collect2.exe: error: ld returned 1 exit status
mingw32-make[1]: *** [Makefile:73: ../plugins/sqldrivers/qsqlmysql.dll] Error 1
mingw32-make[1]: Leaving directory 'C:/Qt/Qt5.14.1/5.14.1/Src/qtbase/src/plugins/sqldrivers/mysql'
mingw32-make: *** [Makefile:52: sub-mysql-make_first] Error 2
[[qanda:topic_unsolved]] QMYSQL driver build problem
Re: Trouble building the QMYSQL Plugin on Unix (Mint 19.2)
I have the same problem with MacOs X (Catalina) :
sqldrivers % /Users/lorenko/Qt5.14.2/5.14.2/clang_64/bin/qmake -- MYSQL_PREFIX=/usr/local
Running configuration tests...
Done running configuration tests.
Configure summary:
Qt Sql Drivers:
DB2 (IBM) .............................. no
InterBase .............................. no
MySql .................................. no
OCI (Oracle) ........................... no
ODBC ................................... no
PostgreSQL ............................. no
SQLite2 ................................ no
SQLite ................................. yes
Using system provided SQLite ......... no
TDS (Sybase) ........................... no
Tried /usr/local/mysql
but same
log file :
(only mysql part)
loaded result for library config.sqldrivers.libraries.mysql
Trying source 0 (type mysqlConfig) of library mysql ...
mysql_config not found.
=> source produced no result.
Trying source 1 (type mysqlConfig) of library mysql ...
mysql_config not found.
=> source produced no result.
Trying source 2 (type mysqlConfig) of library mysql ...
mysql_config not found.
=> source produced no result.
Trying source 3 (type mysqlConfig) of library mysql ...
mysql_config not found.
=> source produced no result.
Trying source 4 (type inline) of library mysql ...
mysql.h not found in [/usr/local/include] and global paths.
=> source produced no result.
Trying source 5 (type inline) of library mysql ...
=> source failed condition 'config.win32'.
Trying source 6 (type inline) of library mysql ...
mysql.h not found in [/usr/local/include] and global paths.
=> source produced no result.
test config.sqldrivers.libraries.mysql FAILED
Thanks