cpp bug with 3.2(now 3.3), 3.1.1 and 2.96

["Nitin Gupta, Noida" <niting at noida dot hcltech dot com>]

Hi,
	The following test program does not link when 
	g++ [3.2 20020722 (experimental)] is invoked with 
	default options. The test case compiles successfully 
	when -O2 option is used. The same behavior is shown 
	by g++ version 2.96 20000731 (Red Hat Linux 7.3 2.96-110) 
	and g++ 3.1. However the SUN native compiler builds it 
	with default options too.

	With g++ 3.2 20020722 (experimental) and g++ 3..1.1  I'm 
	using binutils 1.12 
	The test program

		#include<iostream.h>
		namespace nm
		{
		        int i = 15 ;
		        int j ;
		        class c
		        {
		                public:
		                int k ;

		                int funct()
		                {
		                        return 10 ;
		                } ;
		        } ;
		        extern c dc ;
		        int funct1()
		        {
		           int tempi = 0 ;
		           tempi = dc.funct() ;
		           return tempi ;
		         }
		}
		nm::c dc ;
		int
		main()
		{
		        int ni,nj ;
		        ni = dc.funct() ;
		        cout << ni ;
		        nj = nm::funct1() ;
		        cout << endl << nj ;
		}


Regards.
Nitin.

PS : 	The commands I'm giving:

		$ i686-pc-linux-gnu-g++ --verbose
		Reading specs from
/home2/i386/tools/bin/../lib/gcc-lib/i686-pc-linux-gnu/3.2/specs
		Configured with: /home/niting/gcc3_2/gcc/configure
--prefix=/home/niting/gcc3_2/i386/tools/
		 --enable-languages=c,c++ --with-gnu-ld --with-gnu-as
		Thread model: single
		gcc version 3.2 20020722 (experimental)

		$ i686-pc-linux-gnu-g++  test.cc
		In file included from
/home2/i386/tools/include/c++/3.2/backward/iostream.h:31,
		                 from test.cc:10:
	
/home2/i386/tools/include/c++/3.2/backward/backward_warning.h:32:2: warning:

		#warning This file includes at least one deprecated or
antiquated header. 
		Please consider using one of the 32 headers found in section
17.4.1.2 
		of the C++ standard. Examples include substituting the <X>
header for the <X.h> 
		header for C++ includes, or <sstream> instead of the
deprecated header <strstream.h>. 
		To disable this warning use -Wno-deprecated.
		/tmp/ccp2xw1m.o: In function `nm::funct1()':
		/tmp/ccp2xw1m.o(.text+0x10): undefined reference to `nm::dc'
		collect2: ld returned 1 exit status

		With -O2 success:
		$ i686-pc-linux-gnu-g++  -O2 test.cc
		In file included from
/home2/i386/tools/include/c++/3.2/backward/iostream.h:31,
		                 from test.cc:10:
	
/home2/i386/tools/include/c++/3.2/backward/backward_warning.h:32:2: warning:

		#warning This file includes at least one deprecated or
antiquated header. 
		Please consider using one of the 32 headers found in section

		17.4.1.2 of the C++ standard. Examples include substituting
the <X> header for the 
		<X.h> header for C++ includes, or <sstream> instead of the
deprecated header 
		<strstream.h>. To disable this warning use -Wno-deprecated.
		$