C++ templating - reference errors

[vurk]

Howdy there. thanks in advance.
I'm working on a school assignment (simple binary tree implementation), but i'm getting very weird compiler errors. I've looked all around the forums and on the net but can't find anything that seems to help.

Part of the actual error is here:

driver.cpp:(.text+0x1ba): undefined reference to `bst<float>::bst()'
driver.cpp:(.text+0x1d7): undefined reference to `std::cout'
driver.cpp:(.text+0x1dc): undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(bool)'
driver.cpp:(.text+0x1f1): undefined reference to `bst<float>::~bst()'
driver.cpp:(.text+0x211): undefined reference to `bst<float>::~bst()'
driver.o:(.eh_frame+0x12): undefined reference to `__gxx_personality_v0'
bst.o: In function `__static_initialization_and_destruction_0(int, int)':
bst.cpp:(.text+0x23): undefined reference to `std::ios_base::Init::Init()'
bst.o: In function `__tcf_0':
bst.cpp:(.text+0x6c): undefined reference to `std::ios_base::Init::~Init()'
bst.o:(.eh_frame+0x11): undefined reference to `__gxx_personality_v0'
collect2: ld returned 1 exit status

Fiddiling around with the bst.h and bst.cpp (combining the two, throwing them both in driver, etc.) i get different messages, but they all relate to 'undefined reference'.
Inside my main is what causes the problem (i comment it out, the problem goes away).

int main()
{
bool mybool;
int theInt = 5;
bst<int> theTree();
theTree.print();
menu();
return 0;
}

Thanks a lot in advance.