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 OKconst 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 queriesExecStatusType 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(charconst *)'
/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>
