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Re: [Linker Error] Unresolved external

From: Graf László <graf(dot)laszlo(at)axis(dot)hu>
To: Magnus Hagander <mha(at)sollentuna(dot)net>,pgsql-hackers-win32(at)postgresql(dot)org
Subject: Re: [Linker Error] Unresolved external
Date: 2004-12-06 12:32:23
Message-ID: 41B45157.7090409@axis.hu (view raw or flat)
Thread:
Lists: pgsql-hackers-win32
OK I got it.
I had to reinstall the 8 release and change some install settings.
So now I have the include and lib folders.
But I got a new error message now. It say that I can not install
and start the service because the user grafl is member of admin group.

How can I start it remaining in the admin group?

Magnus Hagander wrote:
> It should contain the include files, but you need to specifically enable that feature for installation (they're not installed by default, IIRC).
> 
> //Magnus 
> 
> 
>>-----Original Message-----
>>From: Graf László [mailto:graf(dot)laszlo(at)axis(dot)hu] 
>>Sent: Monday, December 06, 2004 1:01 PM
>>To: Magnus Hagander; pgsql-hackers-win32(at)postgresql(dot)org
>>Subject: Re: [pgsql-hackers-win32] [Linker Error] Unresolved external
>>
>>I got the 8.0 release but it do not contain include files 
>>only dlls in the lib forder.
>>
>>Magnus Hagander wrote:
>>
>>>You need to link with libpqdll.lib. So far you are just 
>>
>>specifying a directory to look for the .lib in  - not 
>>actually telling it to do the link. I have no idea how to do 
>>that in Borland C++, though. In MSVC you just add the lib 
>>file to your project.
>>
>>>(Also, beware that PostgreSQL 7.2.1 is *very* old. I'd strongly 
>>>suggest you look at something newer. For win32, you can go 
>>
>>with either 
>>
>>>7.4 on cygwin or 8.0 release candidate on native win32)
>>>
>>>//Magnus
>>>
>>>
>>>
>>>>-----Original Message-----
>>>>From: Graf László [mailto:graf(dot)laszlo(at)axis(dot)hu]
>>>>Sent: Monday, December 06, 2004 10:20 AM
>>>>To: pgsql-hackers-win32(at)postgresql(dot)org
>>>>Subject: [pgsql-hackers-win32] [Linker Error] Unresolved external
>>>>
>>>>Hi all,
>>>>
>>>>As a novice I installed PostgreSQL 7.2.1 on Win32 and 
>>
>>works, Borland 
>>
>>>>C++Builder Enterprise Suite 5.0 (build 12.34) what works too.
>>>>
>>>>I decided to combine these two programs and develop a 
>>
>>simple GUI app 
>>
>>>>to display datas queried from PostgreSQL. I did make the following 
>>>>changes in the project's settings:
>>>>
>>>>Project->Properties->Directories->Include path += C:\Program 
>>>>Project->Properties->Directories->Files\PostgreSQL\7\include
>>
>> Librariy 
>>
>>>>Project->Properties->Directories->path += C:\Program 
>>>>Project->Properties->Directories->Files\PostgreSQL\7\lib
>>>>
>>>>(I aded these lines to the project paths).
>>>>
>>>>Within a brand new BCB project I typed in the simpliest code:
>>>>
>>>>
>>>>#include <libpq-fe.h>
>>>>char       *pghost, *pgport, *pgoptions, *pgtty;
>>>>char       *dbName;
>>>>int        nFields, i, j;
>>>>PGconn     *conn;
>>>>PGresult   *res;
>>>>
>>>>pghost = NULL;              /* host name of the backend server */
>>>>pgport = NULL;              /* port of the backend server */
>>>>pgoptions = NULL;           /* special options to start up 
>>
>>the backend
>>
>>>>                                 * server */
>>>>pgtty = NULL;               /* debugging tty for the 
>>
>>backend server */
>>
>>>>dbName = "template1";
>>>>
>>>>/* make a connection to the database */ conn = 
>>
>>PQsetdb(pghost, pgport, 
>>
>>>>pgoptions, pgtty, dbName);
>>>>
>>>>res = PQexec(conn, "BEGIN");
>>>>PQclear(res);
>>>>
>>>>res = PQexec(conn, "DECLARE mycursor CURSOR FOR SELECT * FROM 
>>>>pg_database"); PQclear(res); res = PQexec(conn, "FETCH ALL in 
>>>>mycursor"); nFields = PQnfields(res); for (i = 0; i < nFields; i++)
>>>>    printf("%-15s", PQfname(res, i)); printf("\n\n");
>>>>
>>>>/* next, print out the rows */
>>>>for (i = 0; i < PQntuples(res); i++)
>>>>{
>>>>    for (j = 0; j < nFields; j++)
>>>>        printf("%-15s", PQgetvalue(res, i, j));
>>>>    printf("\n");
>>>>}
>>>>PQclear(res);
>>>>
>>>>res = PQexec(conn, "CLOSE mycursor");
>>>>PQclear(res);
>>>>
>>>>/* commit the transaction */
>>>>res = PQexec(conn, "COMMIT");
>>>>PQclear(res);
>>>>
>>>>/* close the connection to the database and cleanup */ 
>>
>>PQfinish(conn);
>>
>>>>When I run the app I got these errors:
>>>>
>>>>[Linker Error] Unresolved external '_PQconnectdb'
>>>>   referenced from C:\PROGRAM
>>>>FILES\POSTGRESQL\7\CLIENT\BCB_01\MAIN.OBJ
>>>>[Linker Error] Unresolved external '_PQnfields'
>>>>   referenced from C:\PROGRAM
>>>>FILES\POSTGRESQL\7\CLIENT\BCB_01\MAIN.OBJ
>>>>[Linker Error] Unresolved external '_PQexec'
>>>>   referenced from C:\PROGRAM
>>>>FILES\POSTGRESQL\7\CLIENT\BCB_01\MAIN.OBJ
>>>>[Linker Error] Unresolved external '_PQclear'
>>>>   referenced from C:\PROGRAM
>>>>FILES\POSTGRESQL\7\CLIENT\BCB_01\MAIN.OBJ
>>>>[Linker Error] Unresolved external '_PQfinish'
>>>>   referenced from C:\PROGRAM
>>>>FILES\POSTGRESQL\7\CLIENT\BCB_01\MAIN.OBJ
>>>>
>>>>What is wrong? I supose that I miss something to configure.
>>>>
>>>>Laszlo Graf
>>>>
>>>>---------------------------(end of
>>>>broadcast)---------------------------
>>>>TIP 5: Have you checked our extensive FAQ?
>>>>
>>>>              http://www.postgresql.org/docs/faqs/FAQ.html
>>>>
>>>>
>>
>>--
>>Graf László - bitfaragó
>>http://grafl.port5.com/
>>
>>

-- 
Graf László - bitfaragó
http://grafl.port5.com/

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