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Thread: Compiling pgsql C/C++ interfaces on Win not using Cygwin

Compiling pgsql C/C++ interfaces on Win not using Cygwin

From
Tomáš Vondra
Date:
Hello everybody,
   is it possible to compile postgres C/C++ interfaces (use libpq or
   libpq++ in a client application) on Windows not using Cygwin?

   I've just tried to compile some examples from 7.2.1 using MS Visual
   C++ 6, but I got lot of "uresolved external symbol" errors when
   linking, for example:

testlibpq2.obj : error LNK2001: unresolved external symbol _PQfinish
testlibpq2.obj : error LNK2001: unresolved external symbol _PQnotifies
testlibpq2.obj : error LNK2001: unresolved external symbol _PQclear
testlibpq2.obj : error LNK2001: unresolved external symbol _PQresultStatus
testlibpq2.obj : error LNK2001: unresolved external symbol _PQexec
testlibpq2.obj : error LNK2001: unresolved external symbol _PQerrorMessage
testlibpq2.obj : error LNK2001: unresolved external symbol _PQstatus
testlibpq2.obj : error LNK2001: unresolved external symbol _PQsetdbLogin

   I think it means some important libraries are missing (at least I
   think it means this).

   I don't wan't to compile all the server, just the part necessarry
   to use in a client app. I don't want to use ODBC, I'd like to use
   native access to database. If there's such a way?

   Tomas

Re: Compiling pgsql C/C++ interfaces on Win not using Cygwin

From
Bruce Momjian
Date:
This means you didn't include libpq.a in your link line.

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

Tom�� Vondra wrote:
> Hello everybody,
>    is it possible to compile postgres C/C++ interfaces (use libpq or
>    libpq++ in a client application) on Windows not using Cygwin?
>
>    I've just tried to compile some examples from 7.2.1 using MS Visual
>    C++ 6, but I got lot of "uresolved external symbol" errors when
>    linking, for example:
>
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQfinish
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQnotifies
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQclear
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQresultStatus
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQexec
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQerrorMessage
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQstatus
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQsetdbLogin
>
>    I think it means some important libraries are missing (at least I
>    think it means this).
>
>    I don't wan't to compile all the server, just the part necessarry
>    to use in a client app. I don't want to use ODBC, I'd like to use
>    native access to database. If there's such a way?
>
>    Tomas
>
>
>
> ---------------------------(end of broadcast)---------------------------
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--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

Re: Compiling pgsql C/C++ interfaces on Win not using Cygwin

From
"Crercio O. Silva"
Date:
Hi Tomás,

Include the lib in your project (Project => Settings =>Link Tab => Object
Library Modules). You have two options (for debug and release modes):

1) libpq.lib (static version, you don't need to distribute libpq.dll)
2) libpqdll.lib (dinamic link library, you need to distribute libpq.dll)

Also don't forget to set the directories under Tools => Options =>
Directories (Include Files and Library Files).
In the manual there are some info about compiling the libpq libraries in
Win32. I just don't remember where exactly.

PS: I'm assuming you are creating an application with VS6, since you
mentioned that.

[]s

Crercio O. Silva / DBTools Software

----- Original Message -----
From: "Tomáš Vondra" <vondra@tesmail.cz>
To: <pgsql-general@postgresql.org>
Sent: Friday, August 30, 2002 11:22 AM
Subject: [GENERAL] Compiling pgsql C/C++ interfaces on Win not using Cygwin


> Hello everybody,
>    is it possible to compile postgres C/C++ interfaces (use libpq or
>    libpq++ in a client application) on Windows not using Cygwin?
>
>    I've just tried to compile some examples from 7.2.1 using MS Visual
>    C++ 6, but I got lot of "uresolved external symbol" errors when
>    linking, for example:
>
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQfinish
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQnotifies
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQclear
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQresultStatus
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQexec
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQerrorMessage
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQstatus
> testlibpq2.obj : error LNK2001: unresolved external symbol _PQsetdbLogin
>
>    I think it means some important libraries are missing (at least I
>    think it means this).
>
>    I don't wan't to compile all the server, just the part necessarry
>    to use in a client app. I don't want to use ODBC, I'd like to use
>    native access to database. If there's such a way?
>
>    Tomas