[Dev-C++] How can I compile using FLTK, SDL or QT?

Hi.
I'm new to the list. I'm italian and my name is Paolo
Brasolin.
I've got a question. I tried to compile sources that
uses FLTK, SDL or QT with dev-cpp but the linker told
me that there were a LOT of errors caused by undefined
references to the components of the libraries (for
example, "[Linker error] undefined reference to
'Fl_Widget::~Fl_Widget()'" ). I put the includes in
the right directory, but I think that the problem lies
in the fact that I absolutely ignore how to use
makefiles (I found some in each of the libraries
packages). Would someone please help me?

Thanks a lot.

Paolo

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