Calling a library in Symbian C++ using Qt

[zhengping]

Hi everyone,

I need to call a function from a library (.dll format) using a Qt program to be run on a Symbian smartphone. However, the driver is written in Symbian C++. I've Googled and been seen some programs and an article about using Symbian and Qt together, but am not sure what procedure to take regarding header files and libraries to import--or where to begin for my own programs.

At present I'm running the following on Windows Vista:

Qt for Symbian 4.6.3
Qt for Windows 4.6.2
Carbide C++ v2.6
and the S60 5th Edition SDK.

Can anyone advise me on the procedure for doing so, and point me to relevant examples you're aware of? Thanks!

[Lykurg]

See
http://www.forum.nokia.com/Develop/Qt/Getting_started/
http://www.forum.nokia.com/Develop/Qt/Code_examples/
and brows through the wiki from http://www.forum.nokia.com/Develop/Qt/Community/

[zhengping]

Hello everyone,

I'm facing a persistent error trying to access a function within a Symbian library using a Qt program. My setup is Qt 4.6.3, S60 5th Edition SDK v1.0 with OpenC/C++ plugin, Carbide v2.6 on Windows Vista Home Premium.

There's a simple function I must call within the class Csample:

EXPORT_C TInt Csample::ExampleSum()
{ return 5; }

EXPORT_C TInt Csample::ExampleSum()
{ return 5; }

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and the Qt function I used is:

void s60Calling::callToSym()
{
Csample* sampleAccess;
TInt result = sampleAccess->ExampleSum();
 
// afterwards display result on the screen
}

void s60Calling::callToSym()
{
Csample* sampleAccess;
TInt result = sampleAccess->ExampleSum();

// afterwards display result on the screen
}

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I've included the relevant header file sample.h. However, when I build for the Emulator I get the error "Undefined symbol: 'int Csample::ExampleSum(void) (?ExampleSum@Csample@@QAEHXZ)'".

Building for the phone (GCCE) gives the "Undefined reference to Csample::ExampleSum();" error. I've Googled and suspect a library is missing, but found nothing useful. How can I fix these errors?

(thanks Lykurg for the resources!)