Cannot call read function!

From:

davee <davee@nomail.com>

Newsgroups:

comp.lang.c++

Date:

Sat, 03 Oct 2009 17:05:33 +0200

Message-ID:

<4ac7684f$0$279$14726298@news.sunsite.dk>

I am trying to use the code posted here:

http://www.senzee5.com/2008/02/java-style-properties-files-in-c.html

I use it like this:

#include "propertyutil.h"
int main(){

   PropertyUtil properties;
   typedef PropertyUtil::PropertyMapT MapType;
   MapType bob;
   properties.read(config_path.c_str(), bob);

   return 0;
}

but I get the error:

main.cpp:(.text+0xc29): undefined reference to `PropertyUtil::read(char
const*, std::map<std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, std::basic_string<char, std::char_traits<char>,
std::allocator<char> >, std::less<std::basic_string<char,
std::char_traits<char>, std::allocator<char> > >,
std::allocator<std::pair<std::basic_string<char, std::char_traits<char>,
std::allocator<char> > const, std::basic_string<char,
std::char_traits<char>, std::allocator<char> > > > >&)'

'read' is:

class PropertyUtil {
     enum { DEBUG = 0 };

public:
     typedef std::map<std::string, std::string> PropertyMapT;
     typedef PropertyMapT::value_type value_type;
     typedef PropertyMapT::iterator iterator;

     static void read(const char *filename, PropertyMapT &map);
...
...

What am I doing wrong here?