I've written a small program that utilizes the Fast Light Toolkit and for some reason a compiler error is generated when trying to access the functions in the cmath header.
Such as error ::acos has not been declared.
This goes on for pretty much every function it tries to use in the header. What could I be missing?
The header files I have included are
Simple_window.h
Graph.h
both of which are part of the FLTK.
The code is this:
#include "Simple_window.h" // get access to our windows library
#include "Graph.h" // get access to graphics library facilities
int main()
{
using namespace Graph_lib; // our graphics facilities are in Graph_lib
Point tl(100,100); // to become top left corner of window
Simple_window win(tl,600,400,"Canvas"); // make a simple window
Polygon poly; // make a shape (a polygon)
poly.add(Point(300,200)); // add a point
poly.add(Point(350,100)); // add another point
poly.add(Point(400,200)); // add a third point
poly.set_color(Color::red); // adjust properties of poly
win.attach(poly); // connect poly to the window
win.wait_for_button(); // give control to display engine
}
Edit: Here is example code of when the compiler error is generated. This is inside the cmath header.
namespace std
{
// Forward declaration of a helper function. This really should be
// an `exported' forward declaration.
template<typename _Tp> _Tp __cmath_power(_Tp, unsigned int);
inline double
abs(double __x)
{ return __builtin_fabs(__x); }
inline float
abs(float __x)
{ return __builtin_fabsf(__x); }
inline long double
abs(long double __x)
{ return __builtin_fabsl(__x); }
using ::acos; //ERROR HERE
inline float
acos(float __x)
{ return __builtin_acosf(__x); }
inline long double
acos(long double __x)
{ return __builtin_acosl(__x); }
template<typename _Tp>
inline typename __enable_if<double, __is_integer<_Tp>::_M_type>::_M_type
acos(_Tp __x)
{
return __builtin_acos(__x);
}
Edit: Code::blocks is saving files as C files....