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Re: Connecting - Need Help !

From: "Darko Prenosil" <Darko(dot)Prenosil(at)finteh(dot)hr>
To: <pgmoscatt(at)optushome(dot)com(dot)au>,"PostgreSQL [INTERFACES] List" <pgsql-interfaces(at)postgresql(dot)org>
Subject: Re: Connecting - Need Help !
Date: 2003-07-14 14:00:56
Message-ID: 001a01c34a10$88f62230$1d8abfd5@darko (view raw or flat)
Thread:
Lists: pgsql-interfaces
----- Original Message ----- 
From: "Peter Moscatt" <pgmoscatt(at)optushome(dot)com(dot)au>
To: "PostgreSQL [INTERFACES] List" <pgsql-interfaces(at)postgresql(dot)org>
Sent: Tuesday, July 15, 2003 11:28 AM
Subject: [INTERFACES] Connecting - Need Help !


> I am trying my first attempt to write code which will conect to a test
> database I have created.
> 
> The code I used is shown below:
> 
> void ConnectDatabase()
> {
>   char *pghost;
>   char *pgport;
>   char *pgoptions;
>   char *pgtty;
>   char *dbName;
> 
>   PGconn *conn;
>   PGresult *res;
> 
>   pghost = NULL;
>   pgport = NULL;
>   pgoptions = NULL;
>   dbName = "linlog";
> 
>   conn = PQsetdb(pghost,pgport,pgoptions,pgtty,dbName);
> }
> 
> 
> 
> 
> When I compile and make I get the following error:
> 
> linlog.o(.text+0x177): In function `ConnectDatabase()': 
> /home/pmoscatt/C++/linlog/linlog/linlog.cpp:30: undefined reference to
> `PQsetdbLogin' 
> collect2: ld returned 1 exit status 
> gmake[2]: *** [linlog] Error 1 
> gmake[2]: Leaving directory `/home/pmoscatt/C++/linlog/linlog' 
> gmake[1]: Leaving directory `/home/pmoscatt/C++/linlog' 
> gmake[1]: *** [all-recursive] Error 1 
> gmake: *** [all-recursive-am] Error 2 
> *** failed *** 
> 
> 
> 
> What have I done wrong here ??
> 
> Pete
> 
It is not compile, but linking problem. 
You should link Your program with libpq library,
which is usually done by writing something like:

LDFLAGS = -L/usr/local/pgsql/lib -lpq

to Makefile, but it depends on build system You are using.

Regards !


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