Received: from localhost (postgresql.org [64.49.215.8])
	by postgresql.org (Postfix) with ESMTP id DF1CE4769AF
	for <pgsql-interfaces@postgresql.org>;
	Mon, 27 Jan 2003 18:04:34 -0500 (EST)
Received: from news.hub.org (news.hub.org [64.49.215.80])
	by postgresql.org (Postfix) with ESMTP id 7DF3C4761ED
	for <pgsql-interfaces@postgresql.org>;
	Mon, 27 Jan 2003 18:04:03 -0500 (EST)
Received: by news.hub.org (Postfix, from userid 8)
	id 6419443B09A; Mon, 27 Jan 2003 18:04:03 -0500 (EST)
From: "David Wright" <dwright@mergetel.com>
Subject: Difficulty getting started with Postgres C++ interface
Date: Mon, 27 Jan 2003 17:42:11 -0500
X-Newsgroups: comp.databases.postgresql.interfaces
Message-ID: <pan.2003.01.27.17.41.54.499.3486@mergetel.com>
User-Agent: Pan/0.10.0 (Unix)
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
X-Comment-To: ALL
Lines: 80
X-Complaints-To: abuse@mergetel.com
X-DMCA-Complaints-To: abuse@mergetel.com
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint
	properly
X-Postfilter: 1.1
To: pgsql-interfaces@postgresql.org
X-Virus-Scanned: by AMaViS new-20020517
X-Archive-Number: 200301/116
X-Sequence-Number: 3616

Hi there,

I have been successfully using the perl DBI interface for some time and
have just begun a new project which needs to be written in C++. My
problem is that I am unable to compile even a simple C++ program without
error.

I am running a Mandrake 8.1 distribution of Linux, Postgres version 7.1.2
(with the libpq++ stuff that came with it) and trying to compile with
g++.

my program is:

#include <iostream.h>
#include "libpq++.h"

int main()
{
	// Open the connection to the database and make sure it is OK
	
	const char* dbName="dbname=dwright";
	PgDatabase data("dbName");
/*	if ( data.ConnectionBad() ) {
		cout << "Connection was unsuccessful..." << endl;
		cout << "Error message returned: " << data.ErrorMessage() << endl;
	return 1;
	}
	else
		cout << "Connection successful... Enter queries below:" << endl;

	// Interactively obtain and execute queries
	ExecStatusType status;
	string buf;
	int done = 0;
	while (!done)
	{
		cout << "> ";
		cout.flush();
		getline(cin, buf);
		if ( buf != "" )
			if ( (status = data.Exec( buf.c_str() ))
					== PGRES_TUPLES_OK )
				data.DisplayTuples();
			else
				cout << "No tuples returned..." << endl
					<< "status = " << status << endl
					<< "Error returned: "
					<< data.ErrorMessage() << endl;
		else
			done = 1;
	} */
	return 0;
} // End main()

Note that I have commented out everything except the connect!!

my command line is:

g++ -I/usr/include/pgsql myc.cpp -o myc

and the error messages are:

/home/dwright/tmp/ccx7SvXE.o: In function `PgDatabase::PgDatabase(char const *)':
/home/dwright/tmp/ccx7SvXE.o(.PgDatabase::gnu.linkonce.t.(char const *)+0x13): undefined reference to `PgConnection::PgConnection(char const *)'
/home/dwright/tmp/ccx7SvXE.o: In function `PgDatabase::~PgDatabase(void)':
/home/dwright/tmp/ccx7SvXE.o(.gnu.linkonce.t._._10PgDatabase+0x1d): undefined reference to `PgConnection::~PgConnection(void)'
/home/dwright/tmp/ccx7SvXE.o: In function `PgDatabase type_info function':
/home/dwright/tmp/ccx7SvXE.o(.gnu.linkonce.t.__tf10PgDatabase+0x10): undefined reference to `PgConnection type_info function'
/home/dwright/tmp/ccx7SvXE.o(.gnu.linkonce.t.__tf10PgDatabase+0x18): undefined reference to `PgConnection type_info node'
collect2: ld returned 1 exit status

Any assistance will be greatly appreciated.

Regards,
David
-- 
David Wright
912 - 614 Lake Street
St. Catharines, ON  L2N 6P6
Web Site: <http://www.mergetel.com/~dwright>