Re: undefined reference to `connect_to_db`

Those examples were made to work with a util library that is built with the
examples, so thats is why you get undefined symbols, i think the library
source filename is util.cpp or something like it, compile it first and link
it to your code.

2006/11/21, Martin Ivanov <tramni@xxxxxx>:
> Hello! I am running Slackware Linux 11.0 with kernel 2.6.18,
> mysql-5.0.24a-i486-1 and mysql++-2.1.1-i386-1. My mysql user is mysql. I
> have problems with compilation of the first example from the user manual. I
> have renamed it to "mysql++examples.cpp". The program is as follows:
>
> #include "util.h"
> #include <mysql++.h>
> #include <iostream>
> #include <iomanip>
> using namespace std;
>
> int main(int argc,char *argv[])
> {
> mysqlpp::Connection con(false);
> if(!connect_to_db(argc,argv,con)) return 1;
>
> mysqlpp::Query query = con.query();
> query << "select item from stock";
> mysqlpp::Result res = query.store();
>
> cout << "We have:" << endl;
> if(res) {
> char buf[100];
> mysqlpp::Row row;
> mysqlpp::Row::size_type i;
> for(i=0;row=res.at(i);++i) {
> cout << '\t' <<utf8trans(row.at(0),buf,sizeof(buf)) << endl;
> }
> }
> else {
> cerr << "Failed to get item list: " << query.error() << endl;
> return 1;
> }
>
> return 0;
> }
>
> I try to compile it with the following command:
>
> mysql@marto:~$ g++ -I/usr/include/mysql
> -I/home/marto/Linux_programs/mysqlc++/mysql++-2.1.1/examples/
> -I/usr/include/mysql++ -lmysqlclient -lmysqlpp -o exe_mysql++examples
> mysql++examples.cpp
>
> but I get the following error:
>
> /tmp/ccm1jMwt.o(.text+0x148): In function `main':
> : undefined reference to `connect_to_db(int, char**, mysqlpp::Connection&,
> char const*)'
> /tmp/ccm1jMwt.o(.text+0x2f0): In function `main':
> : undefined reference to `utf8trans(char const*, char*, int)'
> collect2: ld returned 1 exit status
>
> Please help me. Any suggestions will be appreciated.
>
> Regards,
> Martin
>
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--
Carlos Flores