QSqlDatabase: QMYSQL driver not loaded

**earthling** · 15th February 2010, 17:42

The configure script you talk about looks like the same one you get from the source distribution,
AFTER you supposedly have installed everything.

Therefore the procedure you seem to recommend is, to be complete:

- install using the binary distribution by running qt-sdk-linux-x86_64-opensource-2010.01.bin
(for documentation, run qt-sdk-linux-x86_64-opensource-2010.01.bin --help)
(there are no options that let you install any SQL drivers)
- go to the installed directory tree, find the ..sdk-2010.01/qt directory
- do ./configure --help (as root, won't work as user), pick out the appropriate options
- re-build what was installed in the first step with the usual configure/make/make install sequence

Whereas installing from source is:

- unpack the file qt-everywhere-opensource-src-4.6.1.tar.gz
- do ./configure --help as plain user, pick out the appropriate options
- build using the usual configure/make/make install sequence

From configure --help, the options on the configure script relating to the sql drivers are these:

Qt Code:

Switch view

-no-sql-<driver> ... Disable SQL <driver> entirely.
    -qt-sql-<driver> ... Enable a SQL <driver> in the QtSql library, by default
                         none are turned on.
    -plugin-sql-<driver> Enable SQL <driver> as a plugin to be linked to
                         at run time.
 
                         Possible values for <driver>:
                         [  db2 ibase mysql oci odbc psql sqlite sqlite2 sqlite_symbian tds ]
 
   -system-sqlite ..... Use sqlite from the operating system.

-no-sql-<driver> ... Disable SQL <driver> entirely.
    -qt-sql-<driver> ... Enable a SQL <driver> in the QtSql library, by default
                         none are turned on.
    -plugin-sql-<driver> Enable SQL <driver> as a plugin to be linked to
                         at run time.

                         Possible values for <driver>:
                         [  db2 ibase mysql oci odbc psql sqlite sqlite2 sqlite_symbian tds ]

   -system-sqlite ..... Use sqlite from the operating system.

To copy to clipboard, switch view to plain text mode

A lot of people on these forums seem to have a mental disorder that causes them to say, without apparent reason, that everything is in the docs

**schnitzel** · 15th February 2010, 18:09

Originally Posted by earthling

(there are no options that let you install any SQL drivers)

I was referring to the command line options for the configure command, which you have so kindly listed, not the command line options for the installer.
I'm not sure what you were expecting from the '.bin' installer with respect to how it gets installed. The point is that all configuration happens AFTER you run the '.bin' installer.

- go to the installed directory tree, find the ..sdk-2010.01/qt directory
- do ./configure --help (as root, won't work as user), pick out the appropriate options
- re-build what was installed in the first step with the usual configure/make/make install sequence

this is not needed if you just want to build the plugin.

Whereas installing from source is:

I have never installed *just* the src tar ball so I cannot comment on that but obviously you have to build the entire thing which takes hours.

A lot of people on these forums seem to have a mental disorder that causes them to say, without apparent reason, that everything is in the docs

and some people think they are just so smart and don't need to read documentation

Look... the binary installer is the entire sdk and also includes the source - get it? Downloading the bin installer saves you from having to build the entire sdk if you can live with the default configuration which is dynamic linking.

Like the output from the confgure --help command says 'by default none are turned on'.
So, right after you install the sdk from the '.bin' installer you need to go to the mysql plugin src directory and build it. That's it. No need to do anything from the 2010.01/qt directory.

Looks like in the end you figured it all out but you went through some steps that were not needed, however you've become more familiar with how things work in Qt - congrats.

**lucasvickers** · 24th February 2010, 23:33

Hello,

I was wondering if any of you have had luck building this driver on OS X 10.5 using the QT 2010.2 package. As I've posted in this thread I am being thrown by the following two issues:

- There is no /src/ directory in the QT installation. I have triple checked and I only see one QT installer for OS X so I am not sure how one could download QT without the source.
- I have installed mysql and I have libmysqlclient.dylib , but there is no libmysqlclient.so . Does anyone know if working with a dynamic lib in QT is much different than a shared object?

Many thanks!
Lucas