Linker error in c++ -- undefined reference to `vtable for String'

Question

While linking cpp file : wrapGetRndAmt.cpp which is below:
wrapGetRndAmt.cpp .....
#include <iostream.h>
#include "archinfo.h"
#include "syscodes.h"
#include "currency_directory.h"
extern MESSAGE_TYPE SetMemMarker();
extern MESSAGE_TYPE FreeMemBlock();
extern "C" int dm_login();
extern "C" int dm_commit();
extern "C" int dm_rollback();
//extern MESSAGE_ARRAY *messageArray;
struct tpsvcInfo *funcAry;
/* Wrapper function to apply rounding rule (to the amount)*/
int wrapGetRndAmt(char * ou_id, char * currency , double& amount)
SetMemMarker();
int rndng_rule=0;
double rndng_val=0.0;
double l_rtrnCode=0.0;
double l_tmp=0.0;
String * s_curr = new String(currency); ///This is the call of the String
The error coming is:
/home/gcrmdev/3.5/B/lib/h/xlstring.h:54: undefined reference to `vtable for String'
/home/gcrmdev/3.5/B/lib/h/xlstring.h:54: undefined reference to `vtable for String'
Header file is below:
xlstring.h
#ifdef SOLARIS
11 #include "mystring.h"
12 #else
13 #include <string.h>
14 #endif
15 #include "xdr.h"
16 #include <cppdefs.h>
17 /* added by prabhat */
18 #include "bglb.h"
19 /* added by prabhat ends */
20
21 /*
22 *-----------------------------------------------------------------------------
23 * CLASS : String
24 * PURPOSE : For performing all string operation
25 * BASE CLASS : Object
26 * PARENT CLASS : Object
27 * COMMENT :
28 * HISTORY :
29 *-----------------------------------------------------------------------------
30 */
31 class String : public CppObj {
32 int len;
33 char *s;
34
35 public:
36
37 int operator == (const String &s1){ return strcmp(s,s1.s) ? 0 : 1;}
38 int operator==(const Object &o)
39 {
40 return ( strcmp ( Type() , o.Type() ) == 0 )
41 ? operator ==( ( const String &)o)
42 : 0 ;
43 }
44 int operator != (const String &s1){ return strcmp(s,s1.s) ? 1 : 0;}
45 int operator < (const String &s1){ return ( strcmp(s,s1.s) < 0 ) ? 1 : 0;}
46 int operator <= (const String &s1){ return ( strcmp(s,s1.s) <= 0 ) ? 1 : 0;}
47 int operator > (const String &s1){ return ( strcmp(s,s1.s) > 0 ) ? 1 : 0;}
48 int operator >= (const String &s1){ return ( strcmp(s,s1.s) >= 0 ) ? 1 : 0;}
49 operator String *() const { return new String( s ); }
50 /* INT4 Length( INT4 & l ) const { l = len; return len; } */
51 MESSAGE_TYPE Length( INT4 & l ) const { l = len; return XL_SUCCESS; }
52 INT4 Length() const { return len; }
53 /* DelhiPuneSync Changes : to take care of memAlloc fail */
54 String( char const *s1) {
55 if ( s1 == NULL) return;
56 s = (char *)memAlloc((len = strlen(s1))+1);
57 if (s != NULL)
58 strcpy(s,s1);
59 }
Can someone help why this error is coming??
Thanks is advance.
Arabinda

Answer 1

Hi,
This is often the result of failing to include the orasqlX.lib file as input to the linker.
I have a walkthrough of integrating Pro*C with Visual Studio here:
http://oradim.blogspot.com/2009/05/oracle-proc-on-windows-with-express.html
Maybe that will be of some help.
How are you linking?
Regards,
Mark