MySQL driver - Very strange problem. PLEASE HELP ME. Thanks.

Hi all.
I am trying to connect Mysql with QT on Window XP.
I made steps:
1. Installed QT SDK
2. Installed MySQL
3. I run Qt Command Prompt to Build the QMYSQL Plugin on Windows.

cd %QTDIR%\src\plugins\sqldrivers\mysql
qmake "INCLUDEPATH+=C:\Program Files\MySQL\MySQL Server 5.0\include" "LIBS+=C:\Program Files\MySQL\MySQL Server 5.0\lib\opt\libmysql.lib" mysql.pro
make

(follow QTdocuments)

it appears me a very strange message :

Quote:

---

...
In file included from main.cpp:44:
../../../sql/drivers/mysql/qsql_mysql.h:52:19: mysql.h: No such file or directory
In file included from main.cpp:44:
../../../sql/drivers/mysql/qsql_mysql.h:107: error: expected `)' before '*' token
make[1]: *** [debug/main.o] Error 1
make[1]: Leaving directory `C:/Qt/2009.02/qt/src/plugins/sqldrivers/mysql'
make: *** [debug] Error 2

---

What happends with me? Please help me.

Thanks.
Diego.

I am 99% sure that is is a problem with the space in your INCLUDEPATH path. On windows always errors occure because of spaces in the paths. So reinstall MySQL in e.g. c:\mysql

Thanks Lykurg .

I have just re-installed Mysql

I run Qt Command Prompt to Build the QMYSQL Plugin on Windows.

cd %QTDIR%\src\plugins\sqldrivers\mysql
qmake "INCLUDEPATH+=C:\mysql\include" "LIBS+=C:\mysql\lib\opt\libmysql.lib" mysql.pro
make

It occurs to me a message :

Quote:

---

C:/Qt/2009.02/qt/src/plugins/sqldrivers/mysql/../../../sql/drivers/mysql/qsql_my
sql.cpp:1419: undefined reference to `mysql_real_escape_string@16'
collect2: ld returned 1 exit status
make[1]: *** [debug\qsqlmysqld4.dll] Error 1
make[1]: Leaving directory `C:/Qt/2009.02/qt/src/plugins/sqldrivers/mysql'
make: *** [debug] Error 2

---

Please help me.

Thanks.
Diego

We seem to be experiencing the same problem.

My company is currently experimenting with Qt for a future development strategy.

This issue however has my bosses worried about Qt's ability to work with MySQL :crying:

Could someone please look into this issue, cause we've been in this loop for the past week without any solution.

Thanks in advance!

Hello everyone!

I'm experiencing the same problem with my Qt and MySQL. Has anyone yet resolved this problem? :confused:

qmake works properly... And as suggested, I used qmake lines from the help files, but still the make does not work properly.
And the problem was:

make
...
%QTDIR//sqldrivers/mysql/qsql_mysql.h:107: error: expected `)' before '*' token
make: *** [main.o] Error 1

And the line 107 which the error message indicates has the following code:
..
explicit QMYSQLDriver(MYSQL *con, QObject * parent=0);
..

I also ran into many problems while trying to compile driver. I solved the problem by downloading mingw-utils 0.3. Add it to PATH variable
Then few simple steps:

cd e:\MySQL\lib\opt

reimp -d libmysql.lib

dlltool -k --input-def libmysql.def --dllname libmysql.dll --output-lib E:\Qt\2010.02\mingw\lib\libmysql.a

reimp libmysql.lib

cd e:\Qt\2010.02\qt\src\plugins\sqldrivers\mysql

qmake "INCLUDEPATH+=E:\MySQL\include" "LIBS+=E:\MYSQL\lib\opt\libmysql.lib" mysql.pro

mingw32-make

NOTICE that reimp is used twice

I tried this solution and the solution in pdf in spanish but I still get these errors:
[cut]
tmp/obj/debug_shared/qsql_mysql.o:C:\Qt\qt\src\plugins\sqldrivers\mysql/../../..
/sql/drivers/mysql/qsql_mysql.cpp:1430: undefined reference to `mysql_query@8'
tmp/obj/debug_shared/qsql_mysql.o:C:\Qt\qt\src\plugins\sqldrivers\mysql/../../..
/sql/drivers/mysql/qsql_mysql.cpp:1447: undefined reference to `mysql_query@8'
tmp/obj/debug_shared/qsql_mysql.o:C:\Qt\qt\src\plugins\sqldrivers\mysql/../../..
/sql/drivers/mysql/qsql_mysql.cpp:1464: undefined reference to `mysql_query@8'
tmp/obj/debug_shared/qsql_mysql.o:C:\Qt\qt\src\plugins\sqldrivers\mysql/../../..
/sql/drivers/mysql/qsql_mysql.cpp:1490: undefined reference to `mysql_real_escap
e_string@16'
collect2: ld returned 1 exit status
mingw32-make[1]: *** [..\..\..\..\plugins\sqldrivers\qsqlmysqld4.dll] Error 1
mingw32-make[1]: Leaving directory `C:/Qt/qt/src/plugins/sqldrivers/mysql'
mingw32-make: *** [debug-all] Error 2

Windows 7 x64, Qt 4.6

i still have that errors too :(


i am using :
Windows 7 x86 Qt 4.6 MySQLServer 5.1

i have this problem too
and i hope to find solution to this problem

This is how i build QMYSQL driver with MinGW/GCC.

1. create directory C:\mysql, C:\mysql\include, and C:\mysql\lib
2. copy mysql headers(*.h) to C:\mysql\include
3. copy libmysql.lib to C:\mysql\lib
4. use command prompt and change directory to C:\mysql\lib and run :
> reimp -d libmysql.lib
> dlltool -d libmysql.def -D libmysql.dll -l libmysql.a -k
5. change directory to mysql driver plugin(for example C:\Qt\2010.03\qt\src\plugins\sqldrivers\mysql) and run:
> qmake "INCLUDEPATH+=C:\mysql\include" "LIBS+=-LC:\mysql\lib -lmysql" mysql.pro
> mingw32-make all

i get this problem
hared/main.o tmp/obj/debug_shared/qsql_mysql.o tmp/obj/debug_shared/moc_qsql_mys
ql.o -L"c:\Qt\2010.04\qt\lib" -L"c:\Qt\2010.04\qt\lib" tmp\obj\debug_shared\qsq
lmysqld_resource_res.o -LC:\mysql\lib -lmysql -lQtSqld4 -lQtCored4
c:/qt/2010.04/mingw/bin/../lib/gcc/mingw32/4.4.0/../../../../mingw32/bin/ld.exe:
cannot find -lmysql
collect2: ld returned 1 exit status
mingw32-make[1]: *** [..\..\..\..\plugins\sqldrivers\qsqlmysqld4.dll] Error 1
mingw32-make[1]: Leaving directory `C:/Qt/2010.04/qt/src/plugins/sqldrivers/mysq
l'
mingw32-make: *** [debug-all] Error 2

i get bored it have been about two weeks trying to build driver

do you have libmysql.a in C:\mysql\lib?

HELP ME!!!

reimp -d libmysql.lib

dlltool -k --input-def libmysql.def --dllname libmysql.dll --output-lib C:\Qt\2010.04\mingw\lib\libmysql.a

reimp libmysql.lib

cd e:\Qt\2010.04\qt\src\plugins\sqldrivers\mysql

qmake "INCLUDEPATH+=C:\MySQL\include" "LIBS+=C:\MYSQL\lib\libmysql.lib" mysql.pro

mingw32-make


I get this problem:

c:\Program Files\Microsoft Visual Studio\VC98\include/xstring: In constructor 's
td::basic_string<_E, _Tr, _A>::basic_string(const _A&)':
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:41: error: class '
std::basic_string<_E, _Tr, _A>' does not have any field named 'allocator'
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:41: error: there a
re no arguments to '_Tidy' that depend on a template parameter, so a declaration
of '_Tidy' must be available
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:41: note: (if you
use '-fpermissive', G++ will accept your code, but allowing the use of an undecl
ared name is deprecated)
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring: In copy construct
or 'std::basic_string<_E, _Tr, _A>::basic_string(const std::basic_string<_E, _Tr
, _A>&)':
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:43: error: class '
std::basic_string<_E, _Tr, _A>' does not have any field named 'allocator'
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:44: error: there a
re no arguments to '_Tidy' that depend on a template parameter, so a declaration
of '_Tidy' must be available
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:44: error: 'npos'
was not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring: In constructor 's
td::basic_string<_E, _Tr, _A>::basic_string(const std::basic_string<_E, _Tr, _A>
&, int, int, const _A&)':
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:47: error: class '
std::basic_string<_E, _Tr, _A>' does not have any field named 'allocator'
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:47: error: there a
re no arguments to '_Tidy' that depend on a template parameter, so a declaration
of '_Tidy' must be available
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring: In constructor 's
td::basic_string<_E, _Tr, _A>::basic_string(const _E*, int, const _A&)':
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:50: error: class '
std::basic_string<_E, _Tr, _A>' does not have any field named 'allocator'
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:50: error: there a
re no arguments to '_Tidy' that depend on a template parameter, so a declaration
of '_Tidy' must be available
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring: In constructor 's
td::basic_string<_E, _Tr, _A>::basic_string(const _E*, const _A&)':
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:52: error: class '
std::basic_string<_E, _Tr, _A>' does not have any field named 'allocator'
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:52: error: there a
re no arguments to '_Tidy' that depend on a template parameter, so a declaration
of '_Tidy' must be available
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring: In destructor 'st
d::basic_string<_E, _Tr, _A>::~basic_string()':
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:59: error: there a
re no arguments to '_Tidy' that depend on a template parameter, so a declaration
of '_Tidy' must be available
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring: In member functio
n 'std::basic_string<_E, _Tr, _A>& std::basic_string<_E, _Tr, _A>::append(const
std::basic_string<_E, _Tr, _A>&)':
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:77: error: 'npos'
was not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring: In member functio
n 'std::basic_string<_E, _Tr, _A>& std::basic_string<_E, _Tr, _A>::append(const
std::basic_string<_E, _Tr, _A>&, int, int)':
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:81: error: 'size_t
ype' was not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:81: error: expecte
d ';' before '_N'
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:82: error: '_N' wa
s not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:84: error: 'npos'
was not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:84: error: '_Len'
was not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:86: error: '_N' wa
s not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:86: error: '_Len'
was not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:87: error: '_Ptr'
was not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:88: error: there a
re no arguments to '_Eos' that depend on a template parameter, so a declaration
of '_Eos' must be available
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring: In member functio
n 'std::basic_string<_E, _Tr, _A>& std::basic_string<_E, _Tr, _A>::append(const
_E*, int)':
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:91: error: 'npos'
was not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:91: error: '_Len'
was not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:93: error: 'size_t
ype' was not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:93: error: expecte
d ';' before '_N'
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:94: error: '_N' wa
s not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:94: error: '_Len'
was not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:95: error: '_Ptr'
was not declared in this scope
c:\Program Files\Microsoft Visual Studio\VC98\include/xstring:96: error: there a
re no arguments to '_Eos' that depend on a template parameter, so a declaration
of '_Eos' must be available
In file included from ..\..\..\..\include/QtCore/../../src/corelib/global/qt_win
dows.h:63,
from ..\..\..\..\include/QtCore/qt_windows.h:1,
from ../../../sql/drivers/mysql/qsql_mysql.h:49,
from main.cpp:44:
c:\Program Files\Microsoft Visual Studio\VC98\include/windows.h: At global scope
:
c:\Program Files\Microsoft Visual Studio\VC98\include/windows.h:30: error: expec
ted unqualified-id before end of line
c:\Program Files\Microsoft Visual Studio\VC98\include/windows.h:30: error: expec
ted '}' before end of line
c:\Program Files\Microsoft Visual Studio\VC98\include/windows.h:30: error: expec
ted declaration before end of line
mingw32-make.exe[1]: *** [tmp/obj/debug_shared/main.o] Error 1
mingw32-make.exe[1]: Leaving directory `C:/Qt/2010.04/qt/src/plugins/sqldrivers/
mysql'
mingw32-make.exe: *** [debug-all] Error 2


Please help meee!!!

let me guess, you are using the command prompt for MSVC, because it tries to use it even if you are intend to use MinGW. So either use the right command prompt or while running qmake use the -spec flag and set the right file.

Yes, I think that is the problem but MinGW is in : c:\qt\2010.04\mingw how can use MinGW command prompt, because I used QT command prompt and I get same error.

or what file should I run to execute the right command prompt??


or what can I do to use -spec flag?

can you write a example please?

I resolved this problem uninstalling visual studio 6.0