How to follow URL links in Gnus

[Chunhua Li]

Hi, lists,

I just started using Emacs/Gnus to read news. When I read messages in article
buffer, I always need to follow url links, so I position cursor on a URL
link and press <RET>, or position mouse on the link and press <mouse-2>. 
With both methods, the following message is displayed in minibuffer, 

*Searching for program: no such file or directory, netscape*

Actually, I have w3m installed with these lines in  ~/.emacs
          (require 'w3m-load)
          (setq mm-text-html-renderer 'w3m)

1. How to instruct Gnus to follow the link with w3m?

According to Gnus menu  *6.4.7 Customizing w3*, I put the following lines in
.emacs, but nothing helps.  

     (eval-after-load "w3"
       '(progn
         (fset 'w3-fetch-orig (symbol-function 'w3-fetch))
         (defun w3-fetch (&optional url target)
           (interactive (list (w3-read-url-with-default)))
           (if (eq major-mode 'gnus-article-mode)
               (browse-url url)
             (w3-fetch-orig url target)))))

I am using Emacs version 21.3.1 and compiled CVS gnus (No Gnus 0.6) by myself, 
./configure gave the following output.
[202]$ ./configure
checking whether make sets $(MAKE)... yes
checking for a BSD-compatible install... /usr/bin/install -c
checking for makeinfo... no
checking for emacs... emacs
checking if emacs is really XEmacs... no
checking prefix for your Emacs... /usr
checking where .elc files should go... $(datadir)/emacs/site-lisp/gnus
checking where etc files should go... $(lispdir)/../../etc
checking where the TeXinfo docs should go... $(prefix)/info
checking for acceptable URL version... "no"
checking for acceptable W3 version... "no"
checking which options to pass on to (X)Emacs... -batch -q -no-site-file -l 
$(srcdir)/dgnushack.el
checking for latex... /usr/bin/latex
checking for available fonts... "no"
configure: creating ./config.status
config.status: creating Makefile
config.status: creating etc/Makefile
config.status: creating lisp/Makefile
config.status: creating texi/Makefile
config.status: creating texi/gnusconfig.tex
config.status: creating texi/ps/Makefile

2. How to check if I have URL and W3 package installed, and do I need to
specify  --with-url=<DIR> --with-w3=<DIR> when I run ./configure.

Best regards,

Chunhua