Connect Qt to MySQL

Detordreur

I'm trying to connect Qt and MySQL,
But i can't build the .dll as explain in the documentation : the lines
cd %QTDIR%\src\plugins\sqldrivers\mysql

qmake "INCLUDEPATH+=C:\MySQL\include" "LIBS+=C:\MYSQL\MySQL Server <version>\lib\opt\libmysql.lib" mysql.pro
nmake

gives me :
cannot find mysql.pro
I'm on Windows 10...

Xardas

Check sources path
example:

cd C:\qt-everywhere-opensource-src-5.6.0\qt-everywhere-opensource-src-5.6.0\qtbase\src\plugins\sqldrivers\mysql
qmake "INCLUDEPATH+=C:\MySQL\include" "LIBS+=C:\MySQL\lib\libmysql.lib" mysql.pro
nmake
nmake install

Detordreur

Do you mean that the folder src\plugins\sqldrivers\mysql must contains "mysql.pro" ?
And i've got no folder named qtbase in my Qt folder

Xardas

@Detordreur said:

Do you mean that the folder src\plugins\sqldrivers\mysql must contains "mysql.pro" ?

Yes

for example:

Download.
http://download.qt.io/official_releases/qt/5.6/5.6.0/single/qt-everywhere-opensource-src-5.6.0.zip
Unpack.
Find "mysql.pro" on ...your path...\qt-everywhere-opensource-src-5.6.0\qtbase\src\plugins\sqldrivers\mysql

Detordreur

You are my hero !
But it still don't work, when i run nmake, I get this :

Setting up environment for Qt usage...
'MySQL' n’est pas reconnu en tant que commande interne
ou externe, un programme exécutable ou un fichier de commandes.
'MySQL' n’est pas reconnu en tant que commande interne
ou externe, un programme exécutable ou un fichier de commandes.

C:\Qt\5.5\mingw492_32>cd C:\qt-everywhere-opensource-src-5.6.0\qtbase\src\plugins\sqldrivers\mysql

C:\qt-everywhere-opensource-src-5.6.0\qtbase\src\plugins\sqldrivers\mysql>qmake "INCLUDEPATH+=C:\Program Files\MySQL\MySQL Server 5.7\include" "LIBS+=C:\Program Files\MySQL\MySQL Server 5.7\lib\libmysql.lib" mysql.pro

C:\qt-everywhere-opensource-src-5.6.0\qtbase\src\plugins\sqldrivers\mysql>set PATH=%PATH%;C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin

C:\qt-everywhere-opensource-src-5.6.0\qtbase\src\plugins\sqldrivers\mysql>nmake

Microsoft (R) Program Maintenance Utility Version 14.00.23918.0
Copyright (C) Microsoft Corporation. Tous droits réservés.

        "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\nmake.exe" -f Makefile.Release all

Microsoft (R) Program Maintenance Utility Version 14.00.23918.0
Copyright (C) Microsoft Corporation. Tous droits réservés.

        g++ -c -pipe -fno-keep-inline-dllexport -Is:/include -O2 -std=c++0x -std=c++0x -fno-exceptions -frtti -Wall -Wextra -DUNICODE -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -IC:/Utils/icu32_54_1_mingw492/include -IC:/openssl/include -IC:/utils/postgresql/pgsql/include -IC:\Program -IFiles\MySQL\MySQL -IServer -I5.7\include -IC:\Qt\5.5\mingw492_32\include\QtCore\5.5.1 -IC:\Qt\5.5\mingw492_32\include\QtCore\5.5.1\QtCore -IC:\Qt\5.5\mingw492_32\include\QtSql\5.5.1 -IC:\Qt\5.5\mingw492_32\include\QtSql\5.5.1\QtSql -IC:\Qt\5.5\mingw492_32\include -IC:\Qt\5.5\mingw492_32\include\QtSql -IC:\Qt\5.5\mingw492_32\include\QtCore -I.moc\release -I..\..\..\..\mkspecs\win32-g++ -o .obj\release\main.o main.cpp
In file included from main.cpp:36:0:
../../../sql/drivers/mysql/qsql_mysql_p.h:55:19: fatal error: mysql.h: No such file or directory
 #include <mysql.h>
                   ^
compilation terminated.
NMAKE : fatal error U1077: 'C:\Qt\Tools\mingw492_32\bin\g++.EXE' : code retour '0x1'
Stop.
NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\nmake.exe"' : code retour '0x2'
Stop.

C:\qt-everywhere-opensource-src-5.6.0\qtbase\src\plugins\sqldrivers\mysql>

Xardas

Set environment variable for mysql and use paths without spaces:
"INCLUDEPATH+=C:\Program Files\MySQL\MySQL Server 5.7\include" "LIBS+=C:\Program Files\MySQL\MySQL Server 5.7\lib\libmysql.lib"
must be like this:
C:\PROGRA~2\MySQL\MYSQLS~1.5
also, you using mingw or VC compiler?
Try this manual(MinGW):
http://seppemagiels.com/blog/create-mysql-driver-qt5-windows

Detordreur

I've tried with both.
This manual gives me a different error :

C:\qt-everywhere-opensource-src-5.6.0\qtbase\src\plugins\sqldrivers\mysql>mingw32-make
mingw32-make -f Makefile.Release all
mingw32-make[1]: Entering directory 'C:/qt-everywhere-opensource-src-5.6.0/qtbase/src/plugins/sqldrivers/mysql'
g++ -c -pipe -fno-keep-inline-dllexport -Is:/include -O2 -std=c++0x -std=c++0x -fno-exceptions -frtti -Wall -Wextra -DUNICODE -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -DQT_NO_DEBUG -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -IC:/Utils/icu32_54_1_mingw492/include -IC:/openssl/include -IC:/utils/postgresql/pgsql/include -IC:\PROGRA~2\MySQL\MYSQLS~1.5\include -IC:\Qt\5.5\mingw492_32\include\QtCore\5.5.1 -IC:\Qt\5.5\mingw492_32\include\QtCore\5.5.1\QtCore -IC:\Qt\5.5\mingw492_32\include\QtSql\5.5.1 -IC:\Qt\5.5\mingw492_32\include\QtSql\5.5.1\QtSql -IC:\Qt\5.5\mingw492_32\include -IC:\Qt\5.5\mingw492_32\include\QtSql -IC:\Qt\5.5\mingw492_32\include\QtCore -I.moc\release -I..\..\..\..\mkspecs\win32-g++  -o .obj\release\main.o main.cpp
In file included from main.cpp:36:0:
../../../sql/drivers/mysql/qsql_mysql_p.h:55:19: fatal error: mysql.h: No such file or directory
 #include <mysql.h>
                   ^
compilation terminated.
Makefile.Release:478: recipe for target '.obj/release/main.o' failed
mingw32-make[1]: *** [.obj/release/main.o] 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

Xardas

Can you share your paths "INCLUDEPATH+=" "LIBS+=" at this line:
qmake "INCLUDEPATH+=C:\MySQL\include" "LIBS+=C:\MySQL\lib\libmysql.lib" mysql.pro

Detordreur

Yes sure :
I tried this :
set mysql=C:\PROGRA~2\MySQL\MYSQLS~1.5
and
set mysql=C:\Program Files\MySQL\MySQL Server 5.7

then
"INCLUDEPATH+=%mysql%include... etc

the two solutions gives me the same error :

compilation terminated.
Makefile.Release:478: recipe for target '.obj/release/main.o' failed
mingw32-make[1]: *** [.obj/release/main.o] 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

I have no folder in C named Mysql, maybe I miss some librairies for MySQL, but I made the complete installation... I don't know ?

jsulm

Try with:

set mysql="C:\Program Files\MySQL\MySQL Server 5.7"

Detordreur

This post is deleted!

Detordreur

It give me :

Cannot find file: Files\MySQL\MySQL.
Cannot find file: Server.
Cannot find file: 5.7\include.
Cannot find file: Files\MySQL\MySQL.
Cannot find file: Server.
Cannot find file: 5.7\lib\libmysql.lib.
Cannot find file: mysql.pro.

I don't understand the line "Mysql.h : no such file or directory" in the error text, there is in fact a file named mysql.h in my folder "MySQL server 5.7\include"

SGaist

Hi,

The best thing to do is to move your MySQL installation in a folder without any space in the path. Or use the 8.3 notation.

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
Appuyez sur une touche pour continuer...

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 ?