#include "config.h"
  #ifdef HAVE_LIBFLTK
  #include "hist.cxx"
  #else
  #include <stdio.h>
  using namespace std;
  int main(){
    printf("No GUI support, try cas instead or recompile Giac with\n");
    printf("./configure --enable-fltk-support\n");
    printf("make clean ; make\n");
  }
  #endif