C ++：对'FMOD :: X'的未定义引用 [英] C++:Undefined reference to 'FMOD:: X'

问题描述

查看各种声音API库后，我决定暂时使用FMOD。

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

问题是，每当我尝试编译一个代码示例，我得到以下错误：

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

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

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

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

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

我使用的代码示例为：

#include <D:\Games\FMOD Programmers API Win32\api\inc\fmod.hpp>
#include <D:\Games\FMOD Programmers API Win32\api\inc\fmod_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...

我使用最新版本的FMOD，并使用Code :: Blocks IDE（ver 10.05），与GNU GCC编译器。项目类型为控制台应用程序。 fmodex.dll文件在我的项目的文件夹中。我使用的是windows XP 32位SP3。

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.

我已链接到 libfmodex.a 对于其他库，它也有在那里，但这不解决问题。

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.

我的问题是，因此，我需要做什么，以阻止这些错误发生？当我在使用其他库之前遇到类似的未定义的引用x错误。我刚刚忘记在Code :: Blocks中链接到他们，一旦我这样做，他们就可以工作了。

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.

如果你需要更多关于代码的信息。

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

推荐答案

当使用FMOD与Code :: Blocks时，您需要使用C API，而不是C ++ API。 FMOD是用Visual Studio构建的，因此C ++符号使用VC管理方案。在FMOD for Windows入门文档中提供了一条注释。

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

这篇关于C ++：对'FMOD :: X'的未定义引用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！