Gcc is joh, g++ is no

Question

Hi,
I'm trying to compile this:
#include<stdio.h>
#include<stdlib.h>
#include <ctype.h>
#include<string.h>
#include <sauv_oracle.h>
void err_report(Cda_Def *cursor) {
sword n;
text msg[512]; /* message buffer to hold error text */
if (cursor->fc > 0)
printf("\n-- ORACLE error when processing OCI function %s \n\n",
oci_func_tab[cursor->fc]);
else
printf("\n-- ORACLE error\n");
n = (sword)oerhms(&lda, cursor->rc, msg, (sword) sizeof msg);
fprintf(stderr, "%s\n", msg);
void logon( char username, char password, char *database)
if (olog(&lda, (ub1 *)hda, (text *)username, -1, (text *)password, -1,
(text *)database, -1, (ub4)OCI_LM_DEF))
err_report((Cda_Def *)&lda);
exit(OCI_EXIT_FAILURE);
int main() {
logon("ocitest", "ocitest", "sauv");
exit(0);
where sauv_oracle.h is:
#ifdef RCSID
static char *RCSid =
"$Header: oci02.c 14-jul-99.13:21:21 mjaeger Exp $ ";
#endif /* RCSID */
/* Copyright (c) 1995, 1999, Oracle Corporation. All rights reserved. */
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <oratypes.h>
/* LDA and CDA struct declarations */
#include <ocidfn.h>
#ifdef __STDC__
#include <ociapr.h>
#else
#include <ocikpr.h>
#endif
/* demo constants and structs */
#include <ocidem.h>
/* oparse flags */
#define DEFER_PARSE 1
#define NATIVE 1
#define VERSION_7 2
/* exit flags */
#define OCI_EXIT_FAILURE 1
#define OCI_EXIT_SUCCESS 0
Lda_Def lda; /* login area */
ub4 hda[HDA_SIZE/(sizeof(ub4))]; /* host area */
Cda_Def cda; /* cursor area */
/* Function prototypes */
void logon ();
void logoff ();
void err_report();
void do_exit();
/* return values from query - kept as globals for simplicity */
uword colid;
uword collen;
Compiling it with gcc (and the appropriate -I flags and -L flags and a -lclntsh) works fine.
Even the resulting binary works (listener_.log lists a connection)
Doing the same thing with g++ results in:
/tmp/ccorVqVe.o(.text+0x5c): In function `err_report(cda_def*)':
: undefined reference to `oerhms(cda_def*, short, unsigned char*, int)'
/tmp/ccorVqVe.o(.text+0xab): In function `logon(char*, char*, char*)':
: undefined reference to `olog(cda_def*, unsigned char*, unsigned char*, int, unsigned char*, int, unsigned char*, int, unsigned)'
collect2: ld returned 1 exit status
What is it, that I'm not doing right?
Volker.

Answer 1

Can you include the OCI7 header file inside an extern "C" block and try?
Regards.