[sc-users] plugin compiling error

[Paul Lansky <paul@xxxxxxxxxxxxxxxxxxxxxxxx>]

I'm trying to compile two plugins in one file and get
a linking problem 

merely sez Undefined Symbols

each of these compiles fine in a separate target

what am I missing? Can I not build a SimpleUnit and a DtorUnit
in the same file?

paul
p.s. yes, it's as simple as this to build (unoptimized) STK ugens
////////////////////////////////////////////
#include "SC_PlugIn.h"
#include "Mandolin.h"
#include "TubeBell.h"

#include "/Users/paul/stk-4.1.3/include/SKINI.h"
#include "/Users/paul/stk-4.1.3/include/SKINI.tbl"
#include "Stk.h"

static InterfaceTable *ft;

struct StkTubeBell : public Unit
{
	TubeBell *tubebell;
};

struct StkMandolin : public Unit
{
	Mandolin *mandolin;
};
 
extern "C"
{
        void load(InterfaceTable *inTable);
        void StkMandolin_next(StkMandolin *unit, int inNumSamples);
        void StkMandolin_Ctor(StkMandolin* unit);
        void StkMandolin_Dtor(StkMandolin* unit);
	void StkTubeBell_next(StkTubeBell *unit, int inNumSamples);
        void StkTubeBell_Ctor(StkTubeBell* unit);

};

//////////////////////////////////////////////////////////////////

void StkMandolin_Ctor(StkMandolin* unit)
{
	Stk :: setRawwavePath("/Users/paul/stk-4.1.3/rawwaves");

	unit->mandolin = new Mandolin((MY_FLOAT) 80);
	unit->mandolin->clear();
	unit->mandolin->noteOn(IN0(0) ,1);
	SETCALC(StkMandolin_next);
	StkMandolin_next(unit, 1);
 
}

void StkMandolin_next(StkMandolin *unit, int inNumSamples)
{
	float *out OUT(0);
	
 	for (int i=0; i < inNumSamples; ++i)
	{
		out[i] = unit->mandolin->tick();
        }

}

void StkMandolin_Dtor(StkMandolin* unit)
{
	delete unit->mandolin;
}
//////////////////////////////////////////////////////////////////

void StkTubeBell_Ctor(StkTubeBell* unit)
{

	unit->tubebell = new TubeBell();
	unit->tubebell->clear();
	unit->tubebell->noteOn(IN0(0) ,1);
	SETCALC(StkTubeBell_next);
	StkTubeBell_next(unit, 1);
 
}

void StkTubeBell_next(StkTubeBell *unit, int inNumSamples)
{
	float *out OUT(0);
	
 	for (int i=0; i < inNumSamples; ++i)
	{
		out[i] = unit->tubebell->tick();
        }

}
 
void load(InterfaceTable *inTable)
{
        ft = inTable;
        DefineDtorUnit(StkMandolin);
	DefineSimpleUnit(StkTubeBell);

}