Boost Adobe gil: undefined reference for jpeg related feature

Hi,

I'm using g++ on ubuntu 7.04.

I'm trying to learn adobe gil, which is a library deal with image processing and accepted by boost.
http://opensource.adobe.com/gil/index.html
(Anybody know some forums specific for boost? I've had a look at Nabble Boost forum, but it seems like a forum for developers)

However, when I compile some examples, e.g., x_gradient.cpp on the official site, I get the following error:
http://graphics.csie.ntu.edu.tw/~jon.../gil.error.txt

I am sure my boost working properly, and I've also installed the libjpeg-dev, libtiff-dev, libpng-dev on ubuntu through apt-get.

So what may be the problem?

Thanks in advance!

Having installed the packages, you still need to tell the compiler/linker that you want to use them.

gcc yadayadayada -ljpeg

You're right.

Thanks!