Library Issue

[Brian C]

Hello all,
	I've run into an issue, and I'm not sure where the problem lies. I 
wrote some code at work during the week to pull down sport scores from a 
web page, and it compiles (IBM's compiler xlC) and works fine.
	I brought the code home to finish up on it, and it fails to compile w/ 
g++ (unchanged).
	Basically, the program is a single .cpp file with no namespace. It 
calls a class "mascot::BoardFetcher" to retrieve and parse the sports 
scores from a web-page.
	Inside of "mascot::BoardFetcher", it calls "dex::HttpSession" to pull 
down the web page.

	When I compile the libraries dex & mascot, they compile fine. When I 
compile the program getscores, it fails on the link part with:

/dynamis/lib/libmascot.a(BoardFetcher.o): In function 
`mascot::BoardFetcher::Fetch(std::basic_string<char, 
std::char_traits<char>, std::allocator<char> > const&)':
BoardFetcher.cpp:(.text+0x279): undefined reference to 
`dex::HttpSession::HttpSession(std::basic_string<char, 
std::char_traits<char>, std::allocator<char> >, bool)'
BoardFetcher.cpp:(.text+0x36e): undefined reference to 
`dex::HttpSession::~HttpSession()'
BoardFetcher.cpp:(.text+0x387): undefined reference to 
`dex::HttpSession::~HttpSession()'
collect2: ld returned 1 exit status


	Now, the twist is, if I copy the code from mascot::BoardFetcher where 
it creates an instance of dex::HttpSession and put it into the main 
program's code, it compiles fine.

        Any ideas?