🚀 go-pugleaf

   
  Hi,

     I don't think you can get an answer from this news group for that 

  problen. There have been many help requests on that matter in the group,

  but people simply ignored or maybe they don't know the answer yet.







In article <1k3jc2INNjnk@iskut.ucs.ubc.ca> keith@msmri.med.ubc.ca writes:


>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