Thanks Dave! 
With your hint, I found the solution. It seems to be apple's fault as someone said. 

Here is what I did.

First, I verified that the developer tools are installed by replacing ld='MACOSX_DEPLOYMENT_TARGET=10.3 cc'
with
ld='env MACOSX_DEPLOYMENT_TARGET=10.3 cc' in file "/System/Library/Perl/5.8.1/darwin-thread-multi-2level/Config.pm".

Second, I run
sudo ln -s /Developer/SDKs/MacOSX10.3.0.sdk/usr/lib/bundle1.o /usr/lib

This will create a symbolic link between where apple has installed that file and where they were supposed to install the file. Presumably the MACOS_DEPLOYMENT_TARGET environment variable was supposed to address that, but actually it hasn't.

Then I began to install the SWISH::stemmer perl module and got no error. After the stemmer module was installed successfully. The error "Can't locate loadable object for module SWISH::Stemmer in @INC" is gone. 

Thanks again!

Huamin(Michael)


---- Original message ----
>Date: Fri, 12 Jan 2007 23:41:38 -0800 (PST)
>From: David L Norris <dave@webaugur.com>  
>Subject: [SWISH-E] Re: Need help on installing SWISH::Stemmer perl  
>To: Multiple recipients of list <swish-e@sunsite3.berkeley.edu>
>
>On Fri, 2007-01-12 at 20:09 -0800, hyuan3@uiuc.edu wrote:
>> I have spent several days on finding the cause of the error but got nothing. I am going mad with it. Does anybody can help me on this? 
>
>Is this maybe a PowerPC Mac (OS X Panther or so)?  If so, your problem
>might be with Apple Xcode not properly installing bundle1.o.  This seems
>to be a very common problem looking around Google.  You might try
>reinstalling DevSDK and all the other development tools.  You might
>want/need to grab a newer version of Xcode (1.5 or newer?) from
>connect.apple.com.
>
>-- 
> David L Norris
>  http://webaugur.com/
>  ICQ - 412039
>