codeblocks - C++:Undefined reference to 'FMOD:: X'

Question

After looking around for various sound API libraries, I have decided to use FMOD for the time being.

Problem is that whenever I try to compile one of the code examples, I get the following errors:

objReleasemain.o:main.cpp|| undefined reference to `FMOD::System::getVersion(unsigned int*)@8'|

objReleasemain.o:main.cpp|| undefined reference to `FMOD::System::init(int, unsigned int, void*)@16'|

objReleasemain.o:main.cpp|| undefined reference to `FMOD::System::createSound(char const*, unsigned int, FMOD_CREATESOUNDEXINFO*, FMOD::Sound**)@20'|

objReleasemain.o:main.cpp|| undefined reference to `FMOD::Sound::setMode(unsigned int)@8'|

The code example that I am using being this:

#include <D:GamesFMOD Programmers API Win32apiincfmod.hpp>
#include <D:GamesFMOD Programmers API Win32apiincfmod_errors.h>
#include <sstream>
#include <windows.h> // for PlaySound()
#include <time.h>
#include <mmsystem.h>    
using namespace std;
int main(int argc, char* argv[])
{
FMOD::System     *system;
FMOD::Sound      *sound1, *sound2, *sound3;
FMOD::Channel    *channel = 0;
FMOD_RESULT       result;
int               key;
unsigned int      version;

/*
    Create a System object and initialize.
*/
result = FMOD::System_Create(&system);


result = system->getVersion(&version);

result = system->init(32, FMOD_INIT_NORMAL, 0);


result = system->createSound("../media/drumloop.wav", FMOD_HARDWARE, 0, &sound1);


result = sound1->setMode(FMOD_LOOP_OFF);    /* drumloop.wav has embedded loop points   which automatically makes looping turn on, */
                                            /* so turn it off here.  We could have also just put FMOD_LOOP_OFF in the above CreateSound call. */

 // Code continues into other bits that work...

I am using the latest version of FMOD and am using the Code::Blocks IDE (ver 10.05), with the GNU GCC compiler. The project is of type "Console application". The fmodex.dll file is in the folder of my project. I am using windows XP 32 bit SP3.

I have linked to the libfmodex.a library and have tried linking to the other libraries it has there as well, but this does not solve the problem.

My question is, therefore, what do I need to do to stop these errors occurring? As when I encountered similar "Undefined reference to x" errors before using other libraries. I had just forgotten to link to them in Code::Blocks and as soon as I did, they would work.

Do say if you need more information regarding the code etc.

Answer 1

When using FMOD with Code::Blocks you need to use the C API, not the C++ API. FMOD is built with Visual Studio, therefore the C++ symbols use the VC mangling scheme. There is a note in the "Getting Started with FMOD for Windows" document that mentions this.

http://en.wikipedia.org/wiki/Name_mangling#How_different_compilers_mangle_the_same_functions