echo-cpp.cpp fails with a linker error

I cannot compile the echo-cpp.cpp example:
http://www.fastcgi.com/devkit/examples/echo-cpp.cpp
I get a linker error.

I would really like to use c++ streams rather than printf.  I am not
especially experienced in C or C++, so I have not been able to diagnose the
error.  Please help.

I am running the Debian Sarge linux distribution with g++ version 3.3.5 and
the latest fastcgi.

It appears that line 118 - 120 in echo-cpp.cpp cause the failure.

---------
$ g++ -lfcgi echo-cpp.cpp -o echo
/tmp/ccmD8dSR.o(.text+0x237): In function `main':
: undefined reference to
`fcgi_streambuf::fcgi_streambuf[in-charge](FCGX_Stream*)'
/tmp/ccmD8dSR.o(.text+0x24c): In function `main':
: undefined reference to
`fcgi_streambuf::fcgi_streambuf[in-charge](FCGX_Stream*)'
/tmp/ccmD8dSR.o(.text+0x261): In function `main':
: undefined reference to
`fcgi_streambuf::fcgi_streambuf[in-charge](FCGX_Stream*)'
/tmp/ccmD8dSR.o(.text+0x418): In function `main':
: undefined reference to `fcgi_streambuf::~fcgi_streambuf [in-charge]()'
/tmp/ccmD8dSR.o(.text+0x42e): In function `main':
: undefined reference to `fcgi_streambuf::~fcgi_streambuf [in-charge]()'
/tmp/ccmD8dSR.o(.text+0x44a): In function `main':
: undefined reference to `fcgi_streambuf::~fcgi_streambuf [in-charge]()'
/tmp/ccmD8dSR.o(.text+0x460): In function `main':
: undefined reference to `fcgi_streambuf::~fcgi_streambuf [in-charge]()'
/tmp/ccmD8dSR.o(.text+0x47c): In function `main':
: undefined reference to `fcgi_streambuf::~fcgi_streambuf [in-charge]()'
/tmp/ccmD8dSR.o(.text+0x49e): more undefined references to
`fcgi_streambuf::~fcgi_streambuf [in-charge]()' follow
collect2: ld returned 1 exit status

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