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From: Bruce Momjian <pgman@candle.pha.pa.us>
Message-Id: <200208210431.g7L4V1215205@candle.pha.pa.us>
Subject: Re: libpq (Postgres 7.2.1) + MacOS X 10.1.5 problem
In-Reply-To: <20020821040106.1E6E113EA7@centaur.acm.jhu.edu>
To: Stephen Lee <slee@acm.jhu.edu>
Date: Wed, 21 Aug 2002 00:31:01 -0400 (EDT)
Cc: pgsql-interfaces@postgresql.org
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Get that -lpq after the C file in the link line.

---------------------------------------------------------------------------

Stephen Lee wrote:
> Here's my simple program:
> 
> #include <stdio.h>
> #include <libpq-fe.h>
> 
> int main() {
>         int i, j;
>         PGconn *dbconn;
>         PGresult *results;
> 
>         dbconn = PQconnectdb( 
> 		"hostaddr=AN_IP_ADDR user=USERNAME dbname=SOMEDB" 
> 	);
> 
>         results = PQexec( dbconn, "select * from account" );
> 
>         for( i = 0; i < PQntuples( results ); i++ ) {
>                 printf( "Row #%i\n", i );
> 
>                 for( j = 0; j < PQnfields( results ); j++ ) {
>                         printf( "    Field: %16s / Value: %s\n",
> 				PQfname( results, j ), PQgetvalue( re
> 				sults, i, j ) 
> 			);
>                 }
>         }
> 
>         PQfinish( dbconn );
>         return( 0 );
> }
> 
> I'm trying to compile a simple program using libpq and initially get
> the following linker error:
> 
> -g -Wall -I/usr/local/pgsql/include -L/usr/local/pgsql/lib -lpq test.c
> -o test
> /usr/bin/ld: table of contents for archive:
> /usr/local/pgsql/lib/libpq.a is out of date; rerun ranlib(1) (can't
> load from it)
> make: *** [all] Error 1
> 
> After running ranlib on libpq.a, I get the following:
> 
> gcc -g -Wall -I/usr/local/pgsql/include -L/usr/local/pgsql/lib -lpq
> test.c -o test
> /usr/bin/ld: Undefined symbols:
> _PQconnectdb
> _PQexec
> _PQfinish
> _PQfname
> _PQgetvalue
> _PQnfields
> _PQntuples
> make: *** [all] Error 1
> 
> Any ideas?
> 
> -Stephen
> 
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-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
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