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POC++ Phidget eventhandler undefined reference 'linker'
 

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  1. POC++ Phidget eventhandler undefined reference 'linker'
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    <p>I am getting the following errors. Based on the last line I believe it a linker error. However, I really don't know what I am talking about. :) I'm a beginner. If you happen to spot any other crappy points please let me know!</p> <p>error: undefined reference to <code>AttachHandler(_CPhidget*, void*)' error: undefined reference to</code>DetachHandler(_CPhidget*, void*)' error: undefined reference to <code>ErrorHandler(_CPhidget*, void*, int, char const*)' error: undefined reference to</code>Data(_CPhidgetBridge*, void*, int, double)' :-1: error: collect2: ld returned 1 exit status</p> <p>I have a header file named eventhandlers.h that contains: </p> <pre><code>#ifndef EVENTHANDLERS_H #define EVENTHANDLERS_H #include &lt;phidget21.h&gt; int CCONV AttachHandler(CPhidgetHandle SENSOR, void *userptr); int CCONV DetachHandler(CPhidgetHandle SENSOR, void *userptr); int CCONV ErrorHandler(CPhidgetHandle SENSOR, void *userptr, int ErrorCode, const char *DESCR); int CCONV Data(CPhidgetBridgeHandle SENSOR, void *userptr, int index, double val); #endif // EVENTHANDLERS_H </code></pre> <p>I am trying to pass the AttachHandler, and others as a parameter of CPhidget_Set_OnAttach_Handler() in a source file name quadbridge.cpp <em>PARTIAL CODE</em>:</p> <pre><code>#include "stdlib.h" #include "quadbridge.h" #include "eventhandlers.h" QuadBridge::QuadBridge(int numOfSensors, int PhidgetID) { this-&gt;SERIAL = 140800; //this-&gt;SERIAL = 137723; this-&gt;bridge = 0; CPhidgetBridge_create(&amp;bridge); setEventHandlers(); if(setAttachController(PhidgetID)) { getNumOfSensorsAttached(numOfSensors); initSensors(); } else { exit(1); } } QuadBridge::~QuadBridge() { CPhidget_close((CPhidgetHandle)bridge); CPhidget_delete((CPhidgetHandle)bridge); } void QuadBridge::setEventHandlers() { CPhidget_set_OnAttach_Handler((CPhidgetHandle)bridge, AttachHandler, 0); CPhidget_set_OnDetach_Handler((CPhidgetHandle)bridge, DetachHandler, 0); CPhidget_set_OnError_Handler((CPhidgetHandle)bridge, ErrorHandler, 0); CPhidgetBridge_set_OnBridgeData_Handler(bridge, Data, 0); CPhidget_open((CPhidgetHandle)bridge, SERIAL); } </code></pre> <p>And finally - I get the whole thing rolling in main.</p> <pre><code>#include "palmtools.h" #include "QuadBridge.h" #include &lt;QApplication&gt; QuadBridge *qb; int main(int argc, char *argv[]) { QApplication a(argc, argv); PalmTools w; w.show(); qb = new QuadBridge(4); return a.exec(); } </code></pre> <p>Thanks for the help!</p>
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