MySQL + Qt 5.7 integration on Ubuntu 16.04
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@ErranusCaminhus This problem has been answered several times on this forum. Try using the search functionality of the forum. Here's one that might help:
https://forum.qt.io/topic/59449/qsqldatabase-qmysql-driver-not-loaded-build-mysql-plugin -
Hi
It seems it cant find libmysqlclient_r.so.16
( the actual mysql client so file)IF you see this post
https://forum.qt.io/topic/59449/qsqldatabase-qmysql-driver-not-loaded-build-mysql-plugin/2Seems to be exact same issue.
libmysqlclient_r.so.16 => not found
So you did rebuild the plugin ? So it will use your installed client so-s ?
http://doc.qt.io/qt-5/sql-driver.htmlUpdate: @p3c0 beat me to it :) so info is redundant but still important if you rebuild the plugin or not.
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@ErranusCaminhus This problem has been answered several times on this forum. Try using the search functionality of the forum. Here's one that might help:
https://forum.qt.io/topic/59449/qsqldatabase-qmysql-driver-not-loaded-build-mysql-plugin@p3c0 said in MySQL + Qt 5.7 integration on Ubuntu 16.04:
@ErranusCaminhus This problem has been answered several times on this forum. Try using the search functionality of the forum. Here's one that might help:
https://forum.qt.io/topic/59449/qsqldatabase-qmysql-driver-not-loaded-build-mysql-pluginHi, really appreciate your quick response!
As I stated, I read many of the topics with related issues and tried all possible combination of solutions. Bit I gave it another try!Following step-bystep guide from user mattewre:
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Clean Ubuntu 14.04 installation: OK
Installed QT in the user Home: OK
During the installation select all "Source Components": OK
Install a compiler: OK
Write you project and you will face problems with: db = QsqlDatabase::addDatabase("QMYSQL"); OK (As can be seen in first post) -
Read this line of the output: libmysqlclient_r.so.16 => not found. (Still not found.)
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Install these packages
sudo apt-get install libssl-dev
sudo apt-get install libmysqlclient-dev
2 of the 3 libraries are still not found after installing referred packages, as can be seen bellow. Actuality libmysqlclient_r.so.16 was installed by the package pointed in his second post (http://launchpadlibrarian.net/94808408/libmysqlclient16_5.1.58-1ubuntu5_amd64.deb):
guilherme@k45a:~/Programs/Qt/5.7/gcc_64/plugins/sqldrivers$ ldd libqsqlmysql.so
linux-vdso.so.1 => (0x00007fff16edf000)
libmysqlclient_r.so.16 => /usr/lib/x86_64-linux-gnu/libmysqlclient_r.so.16 (0x00007f92ac8da000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f92ac6c0000)
libcrypt.so.1 => /lib/x86_64-linux-gnu/libcrypt.so.1 (0x00007f92ac487000)
libnsl.so.1 => /lib/x86_64-linux-gnu/libnsl.so.1 (0x00007f92ac26e000)
libssl.so.10 => not found
libcrypto.so.10 => not found
libQt5Sql.so.5 => /home/guilherme/Programs/Qt/5.7/gcc_64/plugins/sqldrivers/./../../lib/libQt5Sql.so.5 (0x00007f92ac028000)
libQt5Core.so.5 => /home/guilherme/Programs/Qt/5.7/gcc_64/plugins/sqldrivers/./../../lib/libQt5Core.so.5 (0x00007f92ab90a000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f92ab6ec000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f92ab36a000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f92ab061000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f92aae4a000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f92aaa81000)
libicui18n.so.56 => /home/guilherme/Programs/Qt/5.7/gcc_64/plugins/sqldrivers/./../../lib/libicui18n.so.56 (0x00007f92aa5e6000)
libicuuc.so.56 => /home/guilherme/Programs/Qt/5.7/gcc_64/plugins/sqldrivers/./../../lib/libicuuc.so.56 (0x00007f92aa22e000)
libicudata.so.56 => /home/guilherme/Programs/Qt/5.7/gcc_64/plugins/sqldrivers/./../../lib/libicudata.so.56 (0x00007f92a884b000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f92a8646000)
libgthread-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007f92a8444000)
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f92a823c000)
libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f92a7f2a000)
/lib64/ld-linux-x86-64.so.2 (0x000055e897bba000)
libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f92a7cba000)-
Now you should build the MYSQL plugin, according to http://doc.qt.io/qt-5/sql-driver.html documentation:
cd /home/[yourUsername]/Qt/[QtVersion]/Src/qtbase/src/plugins/sqldrivers/mysql
Then use the qmake provided in your Qt5.5 installation
/home/[yourUsername]/Qt/[QtVersion]/gcc/bin/qmake
My qmake output: returns error:
guilherme@k45a:~/Programs/Qt/5.7/Src/qtbase/src/plugins/sqldrivers/mysql$ make
/home/guilherme/Programs/Qt/5.7/gcc_64/bin/moc -DQT_NO_MTDEV -DQT_NO_LIBUDEV -DQT_NO_TSLIB -DQT_NO_LIBINPUT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I/home/guilherme/Programs/Qt/5.7/Src/qtbase/mkspecs/linux-g++ -I/home/guilherme/Programs/Qt/5.7/Src/qtbase/src/plugins/sqldrivers/mysql -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql/5.7.1 -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql/5.7.1/QtSql -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore/5.7.1 -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore/5.7.1/QtCore -I/home/guilherme/Programs/Qt/5.7/gcc_64/include -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore -I/usr/include/c++/5 -I/usr/include/x86_64-linux-gnu/c++/5 -I/usr/include/c++/5/backward -I/usr/lib/gcc/x86_64-linux-gnu/5/include -I/usr/local/include -I/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed -I/usr/include/x86_64-linux-gnu -I/usr/include main.cpp -o .moc/main.moc
g++ -c -pipe -I/usr/include/mysql -O2 -std=c++1y -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -W -Wvla -D_REENTRANT -fPIC -DQT_NO_MTDEV -DQT_NO_LIBUDEV -DQT_NO_TSLIB -DQT_NO_LIBINPUT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql/5.7.1 -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql/5.7.1/QtSql -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore/5.7.1 -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore/5.7.1/QtCore -I/home/guilherme/Programs/Qt/5.7/gcc_64/include -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore -I.moc -I../../../../mkspecs/linux-g++ -o .obj/main.o main.cpp
g++ -c -pipe -I/usr/include/mysql -O2 -std=c++1y -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -W -Wvla -D_REENTRANT -fPIC -DQT_NO_MTDEV -DQT_NO_LIBUDEV -DQT_NO_TSLIB -DQT_NO_LIBINPUT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql/5.7.1 -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql/5.7.1/QtSql -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore/5.7.1 -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore/5.7.1/QtCore -I/home/guilherme/Programs/Qt/5.7/gcc_64/include -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore -I.moc -I../../../../mkspecs/linux-g++ -o .obj/qsql_mysql.o ../../../sql/drivers/mysql/qsql_mysql.cpp
/home/guilherme/Programs/Qt/5.7/gcc_64/bin/moc -DQT_NO_MTDEV -DQT_NO_LIBUDEV -DQT_NO_TSLIB -DQT_NO_LIBINPUT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I/home/guilherme/Programs/Qt/5.7/Src/qtbase/mkspecs/linux-g++ -I/home/guilherme/Programs/Qt/5.7/Src/qtbase/src/plugins/sqldrivers/mysql -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql/5.7.1 -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql/5.7.1/QtSql -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore/5.7.1 -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore/5.7.1/QtCore -I/home/guilherme/Programs/Qt/5.7/gcc_64/include -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore -I/usr/include/c++/5 -I/usr/include/x86_64-linux-gnu/c++/5 -I/usr/include/c++/5/backward -I/usr/lib/gcc/x86_64-linux-gnu/5/include -I/usr/local/include -I/usr/lib/gcc/x86_64-linux-gnu/5/include-fixed -I/usr/include/x86_64-linux-gnu -I/usr/include ../../../sql/drivers/mysql/qsql_mysql_p.h -o .moc/moc_qsql_mysql_p.cpp
g++ -c -pipe -I/usr/include/mysql -O2 -std=c++1y -fvisibility=hidden -fvisibility-inlines-hidden -fno-exceptions -Wall -W -Wvla -D_REENTRANT -fPIC -DQT_NO_MTDEV -DQT_NO_LIBUDEV -DQT_NO_TSLIB -DQT_NO_LIBINPUT -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql/5.7.1 -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql/5.7.1/QtSql -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore/5.7.1 -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore/5.7.1/QtCore -I/home/guilherme/Programs/Qt/5.7/gcc_64/include -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtSql -I/home/guilherme/Programs/Qt/5.7/gcc_64/include/QtCore -I.moc -I../../../../mkspecs/linux-g++ -o .obj/moc_qsql_mysql_p.o .moc/moc_qsql_mysql_p.cpp
rm -f libqsqlmysql.so
g++ -Wl,--no-undefined -Wl,-O1 -Wl,--enable-new-dtags -Wl,-z,origin -Wl,-rpath,$ORIGIN/../../lib -Wl,-rpath,$ORIGIN/../../lib -shared -o libqsqlmysql.so .obj/main.o .obj/qsql_mysql.o .obj/moc_qsql_mysql_p.o -L/usr/lib64/mysql -lmysqlclient_r -lz -lcrypt -lnsl -lm -lssl -lcrypto -L/home/guilherme/Programs/Qt/5.7/gcc_64/lib -lQt5Sql -lQt5Core -lpthread
/usr/bin/ld: cannot find -lmysqlclient_r
collect2: error: ld returned 1 exit status
Makefile:114: recipe for target '../../../../plugins/sqldrivers/libqsqlmysql.so' failed
make: *** [../../../../plugins/sqldrivers/libqsqlmysql.so] Error 1 -
And make output:
guilherme@k45a:~/Programs/Qt/5.7/Src/qtbase/src/plugins/sqldrivers/mysql$ make
rm -f libqsqlmysql.so
g++ -Wl,--no-undefined -Wl,-O1 -Wl,--enable-new-dtags -Wl,-z,origin -Wl,-rpath,$ORIGIN/../../lib -Wl,-rpath,$ORIGIN/../../lib -shared -o libqsqlmysql.so .obj/main.o .obj/qsql_mysql.o .obj/moc_qsql_mysql_p.o -L/usr/lib64/mysql -lmysqlclient_r -lz -lcrypt -lnsl -lm -lssl -lcrypto -L/home/guilherme/Programs/Qt/5.7/gcc_64/lib -lQt5Sql -lQt5Core -lpthread
/usr/bin/ld: cannot find -lmysqlclient_r
collect2: error: ld returned 1 exit status
Makefile:114: recipe for target '../../../../plugins/sqldrivers/libqsqlmysql.so' failed
make: *** [../../../../plugins/sqldrivers/libqsqlmysql.so] Error 1 -
make install returns error pointed out by the guide:
guilherme@k45a:~/Programs/Qt/5.7/Src/qtbase/src/plugins/sqldrivers/mysql$ make install
rm -f libqsqlmysql.so
g++ -Wl,--no-undefined -Wl,-O1 -Wl,--enable-new-dtags -Wl,-z,origin -Wl,-rpath,$ORIGIN/../../lib -Wl,-rpath,$ORIGIN/../../lib -shared -o libqsqlmysql.so .obj/main.o .obj/qsql_mysql.o .obj/moc_qsql_mysql_p.o -L/usr/lib64/mysql -lmysqlclient_r -lz -lcrypt -lnsl -lm -lssl -lcrypto -L/home/guilherme/Programs/Qt/5.7/gcc_64/lib -lQt5Sql -lQt5Core -lpthread
/usr/bin/ld: cannot find -lmysqlclient_r
collect2: error: ld returned 1 exit status
Makefile:114: recipe for target '../../../../plugins/sqldrivers/libqsqlmysql.so' failed
make: *** [../../../../plugins/sqldrivers/libqsqlmysql.so] Error 1 -
Make some symbolic links to make it working (please check mysql version, it could not be 18.1.0 in the future):
sudo ln -s /usr/lib/i386-linux-gnu/libmysqlclient.so /usr/lib/i386-linux-gnu/libmysqlclient_r.so
guilherme@k45a:~$ sudo ln -s /usr/lib/i386-linux-gnu/libmysqlclient.so /usr/lib/i386-linux-gnu/libmysqlclient_r.so
ln: failed to create symbolic link '/usr/lib/i386-linux-gnu/libmysqlclient_r.so': File exists
sudo ln -s /usr/lib/i386-linux-gnu/libmysqlclient.so /usr/lib/i386-linux-gnu/libmysqlclient_r.so.18
OK
sudo ln -s /usr/lib/i386-linux-gnu/libmysqlclient.so /usr/lib/i386-linux-gnu/libmysqlclient_r.so.18.1.0
OK -
Runing again make i have the same errors:
make
It seems that the plugin have been built correctly. Last output is:
mv -f libqsqlmysql.so ../../../../plugins/sqldrivers/
and finally run:
make install
guilherme@k45a:~/Programs/Qt/5.7/Src/qtbase/src/plugins/sqldrivers/mysql$ make
rm -f libqsqlmysql.so
g++ -Wl,--no-undefined -Wl,-O1 -Wl,--enable-new-dtags -Wl,-z,origin -Wl,-rpath,$ORIGIN/../../lib -Wl,-rpath,$ORIGIN/../../lib -shared -o libqsqlmysql.so .obj/main.o .obj/qsql_mysql.o .obj/moc_qsql_mysql_p.o -L/usr/lib64/mysql -lmysqlclient_r -lz -lcrypt -lnsl -lm -lssl -lcrypto -L/home/guilherme/Programs/Qt/5.7/gcc_64/lib -lQt5Sql -lQt5Core -lpthread
/usr/bin/ld: cannot find -lmysqlclient_r
collect2: error: ld returned 1 exit status
Makefile:114: recipe for target '../../../../plugins/sqldrivers/libqsqlmysql.so' failed
make: *** [../../../../plugins/sqldrivers/libqsqlmysql.so] Error 1
guilherme@k45a:~/Programs/Qt/5.7/Src/qtbase/src/plugins/sqldrivers/mysql$ make install
rm -f libqsqlmysql.so
g++ -Wl,--no-undefined -Wl,-O1 -Wl,--enable-new-dtags -Wl,-z,origin -Wl,-rpath,$ORIGIN/../../lib -Wl,-rpath,$ORIGIN/../../lib -shared -o libqsqlmysql.so .obj/main.o .obj/qsql_mysql.o .obj/moc_qsql_mysql_p.o -L/usr/lib64/mysql -lmysqlclient_r -lz -lcrypt -lnsl -lm -lssl -lcrypto -L/home/guilherme/Programs/Qt/5.7/gcc_64/lib -lQt5Sql -lQt5Core -lpthread
/usr/bin/ld: cannot find -lmysqlclient_r
collect2: error: ld returned 1 exit status
Makefile:114: recipe for target '../../../../plugins/sqldrivers/libqsqlmysql.so' failed
make: *** [../../../../plugins/sqldrivers/libqsqlmysql.so] Error 1
And still getting "driver not loaded".
Do you have any other suggestion?
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Hi
It seems it cant find libmysqlclient_r.so.16
( the actual mysql client so file)IF you see this post
https://forum.qt.io/topic/59449/qsqldatabase-qmysql-driver-not-loaded-build-mysql-plugin/2Seems to be exact same issue.
libmysqlclient_r.so.16 => not found
So you did rebuild the plugin ? So it will use your installed client so-s ?
http://doc.qt.io/qt-5/sql-driver.htmlUpdate: @p3c0 beat me to it :) so info is redundant but still important if you rebuild the plugin or not.
@mrjj said in MySQL + Qt 5.7 integration on Ubuntu 16.04:
Hi
It seems it cant find libmysqlclient_r.so.16
( the actual mysql client so file)
IF you see this post
https://forum.qt.io/topic/59449/qsqldatabase-qmysql-driver-not-loaded-build-mysql-plugin/2
Seems to be exact same issue.
libmysqlclient_r.so.16 => not found
So you did rebuild the plugin ? So it will use your installed client so-s ?
http://doc.qt.io/qt-5/sql-driver.html
Update: @p3c0 beat me to it :) so info is redundant but still important if you rebuild the plugin or not.Hi! @mrjj. I appreciate you reply!
After installing libmysqlclient deb package supplied in the step-by-step post, i can see now that libmysqlclient_r.so.16 doesn't have dependency not found anymore, but i have the same fault for the other 2 libraries:
libssl.so.10 => not found
libcrypto.so.10 => not foundAfter that, following along the step-by-step, even if i have libmysqlclient present, qmake and make are still throwing errors which i described in the last post.
Actually i'm not certain if i rebuilt the plugin as you suggested.
Do you mean qmake and make results?
Could you elaborate on that or do you have any other suggestion?Thank you!
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Depending upon your distro install libssl package.
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@p3c0 said in MySQL + Qt 5.7 integration on Ubuntu 16.04:
Depending upon your distro install libssl package.
Yes. Sure i have. See:
guilherme@k45a:~$ dpkg --get-selections | grep libssl
libssl-dev:amd64 install
libssl-doc install
libssl1.0.0:amd64 install
libssl1.0.0:i386 install -
Hi
Yes, it seems you build it.
Makefile:114: recipe for target '../../../../plugins/sqldrivers/libqsqlmysql.so' failed
Also +10 for actually reading the posts and try first :)There still seems to be a build issue
/usr/bin/ld: cannot find -lmysqlclient_r-lmysqlclient_r
Its 100% sure its not -llibmysqlclient_r ?
Im not that used to linux so im afraid i would not spot path mismatches and such things
Others here might have better suggestions to this fine output :)
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Hi,
Unless I misread, you didn't install the development package neither for MySQL nor OpenSSL.
Interested in AI ? www.idiap.ch
Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct -
Hi,
Unless I misread, you didn't install the development package neither for MySQL nor OpenSSL.
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Hi
Yes, it seems you build it.
Makefile:114: recipe for target '../../../../plugins/sqldrivers/libqsqlmysql.so' failed
Also +10 for actually reading the posts and try first :)There still seems to be a build issue
/usr/bin/ld: cannot find -lmysqlclient_r-lmysqlclient_r
Its 100% sure its not -llibmysqlclient_r ?
Im not that used to linux so im afraid i would not spot path mismatches and such things
Others here might have better suggestions to this fine output :)
@mrjj said in MySQL + Qt 5.7 integration on Ubuntu 16.04:
Hi
Yes, it seems you build it.
Makefile:114: recipe for target '../../../../plugins/sqldrivers/libqsqlmysql.so' failed
Also +10 for actually reading the posts and try first :)
There still seems to be a build issue
/usr/bin/ld: cannot find -lmysqlclient_r
-lmysqlclient_r
Its 100% sure its not -llibmysqlclient_r ?
Im not that used to linux so im afraid i would not spot path mismatches and such things
Others here might have better suggestions to this fine output :)Thank you!
I'm happy to say that i feel like the cast away of the movie after making fire!
Just managed to solve this issue.Based on this topic: http://askubuntu.com/questions/772024/cannot-compile-qt-5-6-0-mysql-plugin-in-ubuntu-16-04-lts-64bit, what i did was to create one more link:
guilherme@k45a:~$ sudo ln -s /usr/lib/x86_64-linux-gnu/libmysqlclient.so /usr/lib/x86_64-linux-gnu/libmysqlclient_r.so
After that, qmake, make and make install went well with no errors!
I hope this thread help people with the same problem.
Thanks for all the assistance! -
Indeed, however I did misread, the calls seem to have been done.
But something looks wrong since the .so files can't be found.
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Indeed, however I did misread, the calls seem to have been done.
But something looks wrong since the .so files can't be found.
@SGaist said in MySQL + Qt 5.7 integration on Ubuntu 16.04:
Indeed, however I did misread, the calls seem to have been done.
But something looks wrong since the .so files can't be found.Interesting to see what ldd on libqsqlmysql.so displays now, after creating the link:
guilherme@k45a:~/Programs/Qt/5.7/gcc_64/plugins/sqldrivers$ ldd libqsqlmysql.so
linux-vdso.so.1 => (0x00007ffe33d5f000)
libmysqlclient.so.20 => /usr/lib/x86_64-linux-gnu/libmysqlclient.so.20 (0x00007f8c1fcb1000)
libQt5Sql.so.5 => /home/guilherme/Programs/Qt/5.7/gcc_64/plugins/sqldrivers/./../../lib/libQt5Sql.so.5 (0x00007f8c1fa6c000)
libQt5Core.so.5 => /home/guilherme/Programs/Qt/5.7/gcc_64/plugins/sqldrivers/./../../lib/libQt5Core.so.5 (0x00007f8c1f34d000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f8c1efcb000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f8c1ec02000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f8c1e9e7000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f8c1e7e3000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f8c1e5c6000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f8c1e2bc000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f8c1e0a6000)
libicui18n.so.56 => /home/guilherme/Programs/Qt/5.7/gcc_64/plugins/sqldrivers/./../../lib/libicui18n.so.56 (0x00007f8c1dc0b000)
libicuuc.so.56 => /home/guilherme/Programs/Qt/5.7/gcc_64/plugins/sqldrivers/./../../lib/libicuuc.so.56 (0x00007f8c1d853000)
libicudata.so.56 => /home/guilherme/Programs/Qt/5.7/gcc_64/plugins/sqldrivers/./../../lib/libicudata.so.56 (0x00007f8c1be70000)
libgthread-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007f8c1bc6d000)
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f8c1ba65000)
libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f8c1b754000)
/lib64/ld-linux-x86-64.so.2 (0x000055a9c6cac000)
libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f8c1b4e3000)Seems like it changed the entire dependency table.
