QMYSQL driver not loaded on Ubuntu

Malhar

Hi SGaist,
i too faced this error and i did ldd libmysqlclient_r.so.16 and installed the dependency but still m getting this error QMYSQL driver not found available drivers QSQLITE.

SGaist

libmysqlclient_r.so.16 is the MySQL client library. What you should test is the Qt driver plugin. But based on available driver list, you don't have the MySQL plugin.

Malhar

@SGaist ok. Once i faced this problem and i solved installing dependency of .so file.
Now what should i do then.

SGaist

How did you install Qt ?

Malhar

using wget command "http://download.qt.io/archive/qt/5.1/5.1.0/qt-linux-opensource-5.1.0-x86_64-offline.run"

SGaist

You're aware that the current version is 5.5.1, aren't you ?

Malhar

yes i know about the latest version but my whole development is done on Qt5.1 so i dont want to change the version.

SGaist

Then you might have to build the plugin yourself.

ram1111

Hello SGaist i'm a beginner to Qt.

i get and installed Qt 5.7 in x64 edition for ubuntu.
I have QTPLUGIN += qsqlmysql and QT += sql in file .pro

when i try connect QMYSQL i got Error like :-
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QPSQL QPSQL7
QSqlError("", "Driver not loaded", "Driver not loaded")

when i do
itas02@itas02:/opt/Qt5.7.0/5.7/gcc_64/plugins/sqldrivers$ ldd libqsqlmysql.so
i got this
itas02@itas02:/opt/Qt5.7.0/5.7/gcc_64/plugins/sqldrivers$ ldd libqsqlmysql.so
linux-vdso.so.1 => (0x00007fff17fa3000)
libmysqlclient_r.so.16 => not found
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f379c377000)
libcrypt.so.1 => /lib/x86_64-linux-gnu/libcrypt.so.1 (0x00007f379c13e000)
how to get libmysqlclient_r.so ?

when i try to build qmake
by
$:/src/plugins/sqldrivers/mysql# /home/../Qt5.7/5.7/gcc_64/bin/qmake “INCLUDEPATH+=/usr/include/mysql” “LIBS+=-L/usr/lib/mysql” mysql.pro
after entering make command

i'm getting like this

g++ -c -pipe -O2 -std=gnu++11 -fvisibility=hidden -fvisibility-inlines-hidden -D_REENTRANT -Wall -W -fPIC -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -I/opt/Qt5.7.0/5.7/gcc_64/include -I/opt/Qt5.7.0/5.7/gcc_64/include/QtSql -I/opt/Qt5.7.0/5.7/gcc_64/include/QtCore -I. -I/opt/Qt5.7.0/5.7/gcc_64/mkspecs/linux-g++ -o main.o main.cpp
In file included from main.cpp:44:0:
../../../sql/drivers/mysql/qsql_mysql.h:52:19: fatal error: mysql.h: No such file or directory
#include <mysql.h>
^
compilation terminated.
make: *** [main.o] Error 1

i have a mysql.h in /usr/include/mysql/

please let me know where i'm doing mistake are i missing any step.
thanks in advance

SGaist

How did you install the MySQL development package ?

And why are you using two different version of Qt ? You are inspecting one in /opt/ and you seem to be calling qmake from another install of Qt in your home folder.

chawila

Can someone help me here please...

i ran

qmake "INCLUDEPATH+=/usr/local/include" "LIBS+=-L/usr/local/lib -lmysqlclient_r" mysql.pro

And i got these error:

qmake: could not exec '/usr/lib/x86_64-linux-gnu/qt4/bin/qmake': No such file or directory

What should i do?..

SGaist

Please don't highjack other people thread.

You are already getting answers on your other thread here.

And you should use the complete path to the qmake of the version of Qt you are trying to build the plugin for. Without the path, you are calling your distribution installed qmake. Furthermore this one is for Qt 4.