"undefined symbol" right after execution of program

[mahmoodn]

Hi
I have a data type and I can instantiate a variable of that type. like this:

FetchAddr faddr(VirtualMemoryAddress( 0x0a ));

The definition of FetchAdr is:

struct FetchAddr {
  Flexus::SharedTypes::VirtualMemoryAddress theAddress;
  FetchAddr(Flexus::SharedTypes::VirtualMemoryAddress anAddress)
     : theAddress(anAddress)
  { }
};

Now I have a class that faddr is a private (or public) variable

class FLEXUS_COMPONENT(BPred)  {
  static FetchAddr faddr;

  public:
   FLEXUS_COMPONENT_CONSTRUCTOR(BPred)
    : base( FLEXUS_PASS_CONSTRUCTOR_ARGS )
    {
       faddr = VirtualMemoryAddress( 0x0a );
    }
	...
}

Assume the macros are defined properly.

The code compiles and links without any problem. However when I start the program, it says:
"undefined symbol: _ZN6nBPred14BPr edComponent8fad dr"

it says there no symbol for faddr.

any idea about that?

[weaknessforcats]

faddr is a class static variable. That says faddr can be accessed without a FLEXUS_COMPONEN T object. However this does not create faddr.

You need to declare a static object faddr outside any class to create the object you want to access from inside the class.

[mahmoodn]

Is there any way to avoid static variable? any alternative?

[weaknessforcats]

This situation is usually handled by creating a Singleton object.

Read this: http://bytes.com/topic/c/insights/65...erns-singleton

It's in the C++ Insights forum.