Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Message-ID: <41353519.3090607@x-ray.at>
Date: Wed, 01 Sep 2004 04:34:01 +0200
From: Reini Urban <rurban AT x-ray DOT at>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; de-AT; rv:1.8a2) Gecko/20040714
MIME-Version: 1.0
To: Jingzhao Ou <jasonou AT yahoo DOT com>
CC: cygwin AT cygwin DOT com
Subject: Re: Compiling TCL C extensions using Cygwin gcc
References: <20040831223210 DOT 73946 DOT qmail AT web80404 DOT mail DOT yahoo DOT com>
In-Reply-To: <20040831223210.73946.qmail@web80404.mail.yahoo.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
X-IsSubscribed: yes

Jingzhao Ou schrieb:
> I tried to compile a simple Tcl C extension using Cygwin gcc. I use the
> following commands:
> 
> gcc -shared -ltcl -L/lib random.o
> 
> I got the following error messege:
> 
> random.o(.text+0x31):random.c: undefined reference to `_Tcl_WrongNumArgs'
> random.o(.text+0x5e):random.c: undefined reference to `_Tcl_GetIntFromObj'
> random.o(.text+0x98):random.c: undefined reference to `_Tcl_GetObjResult'
> random.o(.text+0xad):random.c: undefined reference to `_Tcl_SetIntObj'
> random.o(.text+0xe2):random.c: undefined reference to `_Tcl_PkgRequire'
> random.o(.text+0x11a):random.c: undefined reference to `_Tcl_CreateObjCommand'
> random.o(.text+0x135):random.c: undefined reference to `_Tcl_PkgProvide'
> collect2: ld returned 1 exit status
> 
> I can see that tcl.h is located at /usr/include. Also, libtcl84.a and
> libtclstub84.a are located at /lib.
> 
> Can any one kindly help me out?

lots of beginners mistakes: there's a good gcc primer in the net. please 
check that out.
   http://www.network-theory.co.uk/gcc/intro/

1. libs after the source,
2. library search path before the lib, otherwise it will not find it.
3. -shared ???

See that there's an tcl .a lib but no .dll (for completeness sake: no 
.la pointing to a .dll at /usr/bin), so you cannot build a shared exe.

=> gcc random.c -L/usr/lib -ltcl -o random

but -L/usr/lib is redundant because thats in the standard search path

=> gcc random.c -ltcl -o random

Note: the .exe extension is added automatically to random.


-- 
Reini Urban
http://xarch.tu-graz.ac.at/home/rurban/

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/