C++ Application

hi rfrenz,

LDFLAGS+= -mctors-in-init
LDLIBS:=-lsupc++ $(LDLIBS)

Hi wentao,

// hello_nios.cpp# include <iostream>
int main (int argc, char * argv) {
  std::cout << "Hello NIOS" << std::endl;
  return 0;
}

include Rules.mak
CFLAGS += -IC:/altera/kits/nios2/bin/nios2-gnutools/include/c++/3.4.1 -IC:/altera/kits/nios2/bin/nios2-gnutools/include/c++/3.4.1/nios2-elf
LDFLAGS += -mctors-in-init
LDLIBS := -lsupc++ $(LDLIBS)
all: hello_nios.exe

unfortunately iostream is not available to uClinux (is it from libstdc++.a? better to check this). I should have pointed that out in the previous post.

// overloading class member functions# include <stdio.h>
//rectangle class declarartion
class Rectangle
{
public:
  //constructors
  Rectangle(int width, int height);
  ~Rectangle(){}
  // overloaded class function DrawShape
 void DrawShape() const;
 void DrawShape (int aWidth, int AHeight) const;
private:
 int itsWidth;
 int itsHeight;
};
//constructor implementation
Rectangle::Rectangle(int width, int height)
{
itsWidth = width;
itsHeight = height;
}
// overloaded DrawShape - takes no values
// draws based on current class member values
void Rectangle::DrawShape() const
{
  DrawShape(itsWidth, itsHeight);
}
// overloaded DrawShape - takes Two Values
// draws shape based on the parameters
void Rectangle::DrawShape(int width, int height) const
{
 for (int i = 0; i<height; i++)
 {
  for (int j = 0; j< width; j++)
  {
   printf( "*");
  }
  printf( "\n");
 }
}
// driver program to demonstrate overloaded functions
int main()
{
//initialize the rectangle to 30,5
Rectangle theRect(30,5);
printf("DrawShape(): \n");
theRect.DrawShape();
printf("\nDrawShape(40,2): \n");
theRect.DrawShape(40,2);
return 0;
}

You might run into an error like

In function `__gnu_cxx::__verbose_terminate_handler()':
/build/nios2/bin/nios2-gnutools/src/gcc/libstdc++-v3/libsupc++/vterminate.cc:68:
 undefined reference to `_impure_ptr'

#include <stdio.h>
struct __myreent
{
  int _errno;
  FILE *_stdin, *_stdout, *_stderr;
};
static struct __myreent __myblock = {
 0, stdin, stdout, stderr
};
struct __myreent *_impure_ptr=&__myblock;

Thanks a lot, Wentao, that worked.

uClibc has supported libstdc++since v0.9.11, and I've used it without problem under m68k uClinux.

Hello,

Thanks Nate and Robert,