Compile FLTK with g++

Question

I am working through Stroustrup\'s Principles and Practices using C++. I am trying to get the following program to compile.

#include 
#include <         


        

Answer 1

You have to link it with the libraries:

g++ -std=c++11 trial.cpp -lfltk -o trial

For your code this library is enough, but depending on what classes you use you might need to add: -lfltk_forms -lfltk_gl -lfltk_images also.

You can also use fltk-config as mentioned here:

g++ -std=c++11 `fltk-config --cxxflags` trial.cpp  `fltk-config --ldflags` -o trial

Note: it is important to have the linking parameters (-l) after your code files (cpp and includes), otherwise you get compile errors.