🚀 go-pugleaf

I am having difficulties linking to a very simple class with g++.
The program compiles, links and runs properly with BC++ 3.1.  
I am running gcc 2.3.3 
with libg++ 2.3 on a SUN OS 4.1.1.  Gcc is installed in a directory
other than /usr/local. 

I have tried to make the class as simple as possible and based its 
design on Complex.h in libg++.  I have tried a similiar test program
with the Complex.h class and it compiled, linked and ran properly with
g++.  The 2 test files and the class I am trying to link to are 
included at the end of this file.

When I type the command

    g++ test1.c test2.c -lm

I get the error message

    ld: Undefined symbol 
       ___7mpfloatRC7mpfloat 
       ___7mpfloatd 
       ___ml__FRC7mpfloatT0 
       __$_7mpfloat 
    collect: /usr/bin/ld returned 2 exit status

I am obviously missing something simple.  Could someone please point
it out to me.

Thanks in advance.

Keith S Cover
Physics, UBC
keith@msmri.med.ubc.ca

test1.c
=======

#include <iostream.h>
#include <math.h>
#include "mpf14.h"

mpfloat square(mpfloat a);

main() {

    mpfloat a = 4;
    mpfloat b = square(a);

    return 0;
}


test2.c
=======

#include "mpf14.h"

mpfloat square(mpfloat a) {

    return( a*a );

}


mpf14.h
=======

#ifndef _mpfloat_h
#ifdef __GNUG__
#pragma interface
#endif
#define _mpfloat_h 1


// INCLUDE FILES 
#include <iostream.h>
#include <math.h>
#include <stdlib.h>


class mpfloat {

protected:

    double num;

public:

    // constructors and destructors
    mpfloat();
    mpfloat(const mpfloat& x);
    mpfloat(const double x);
    ~mpfloat();

    // get value
    double getnum() const;

};


// INLINE FUNCTION PROTOTYPES

// Arithmetic operators
mpfloat operator * ( const mpfloat& x, const mpfloat& y);

// INLINE MEMBERS

// constructors
inline mpfloat::mpfloat() {
}
inline mpfloat::mpfloat(const mpfloat& x) :num(x.getnum()) {
}
inline mpfloat::mpfloat(const double x) {
    num = x;
}
inline mpfloat::~mpfloat() {
}


// Get number
inline double mpfloat::getnum() const {
    return(num);
}


// Inline Functions

inline mpfloat operator * ( const mpfloat& x, const mpfloat& y) {
    return mpfloat( x.getnum()*y.getnum() );
}

#endif // _mpfloat_h