Connect Qt to MySQL

Detordreur

I did it, it resolved my first error, but it gives me a new one :

My lines :

cd C:\qt-everywhere-opensource-src-5.6.0\qtbase\src\plugins\sqldrivers\mysql
set mysql=C:\MySQL\MySQL_Server_5.7
qmake "INCLUDEPATH+=%mysql%\include" "LIBS+=%mysql%\lib\libmysql.lib" mysql.pro
mingw32-make

And the error :

mingw32-make[1]: Entering directory 'C:/qt-everywhere-opensource-src-5.6.0/qtbase/src/plugins/sqldrivers/mysql'
g++ -Wl,-s -shared -Wl,-subsystem,windows -Wl,--out-implib,C:\qt-everywhere-opensource-src-5.6.0\qtbase\plugins\sqldrivers\libqsqlmysql.a -o ..\..\..\..\plugins\sqldrivers\qsqlmysql.dll .obj/release/main.o .obj/release/qsql_mysql.o .obj/release/moc_qsql_mysql_p.o  C:\MySQL\MySQL_Server_5.7\lib\libmysql.lib -LC:/Qt/5.4/mingw491_32/lib -lQt5Sql542 -lQt5Core542 .obj\release\qsqlmysql_resource_res.o
C:/Qt/Tools/mingw491_32/bin/../lib/gcc/i686-w64-mingw32/4.9.1/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lQt5Sql542
C:/Qt/Tools/mingw491_32/bin/../lib/gcc/i686-w64-mingw32/4.9.1/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lQt5Core542
collect2.exe: error: ld returned 1 exit status
Makefile.Release:81: recipe for target '..\..\..\..\plugins\sqldrivers\qsqlmysql.dll' failed
mingw32-make[1]: *** [..\..\..\..\plugins\sqldrivers\qsqlmysql.dll] Error 1
mingw32-make[1]: Leaving directory 'C:/qt-everywhere-opensource-src-5.6.0/qtbase/src/plugins/sqldrivers/mysql'
makefile:38: recipe for target 'release-all' failed
mingw32-make: *** [release-all] Error 2
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SGaist

Looks like you are trying to build the Qt 5.6.0 sources with Qt 5.4.2 ?

Detordreur

Yes, I was, so I reinstall Qt 5.6, finally, and I get a (last?) error : The compiler is MSVC 2015, but at the line "nmake", i get a invalid command error
So I tried to call vcvarsall.bat, but I doesn't not change anything
(Yes i'm really a beginner)

jsulm

In your previous post I see: mingw32-make
That means you was using MinGW. Did you switch to MSVC2015?
Did you rerun qmake?

Detordreur

Yes I have, I desinstalled Qt 5.5, and reinstall Qt 5.6, and now the Qt console is name MSVC 2015, but it don't recognized the line "nmake"...
Yes I rerun qmake

SGaist

Open a Visual Studio developer console, that will make thing easier. IIRC it should be in one of the subfolder of the Visual Studio Start menu entry.

Detordreur

I did it : qmake become invalid command, how do I set environnement to avoid it ?

SGaist

Either use the full path to qmake or go to the Qt folder and IIRC there's a qtvars.bat file to setup the paths needed.

Detordreur

Ok perfect, I finally made it, but I don't understand where I have to put the dll to run a project with MySQL ?

cfdev

@Detordreur like all sql plugin -> /sqldrivers

Detordreur

This is what i've done, in the folder of the executable, but when I try to compile this gives me :
(10061) QMYSQL : Unable to connect

SGaist

Isn't it rather when you run your application ?

If it can't connect, did you check your network settings ? Is your database running ?