gcc with helloworld for 64bit ?

["Maurizio Caloro" <mauric%gmx.ch@localhost>]

Hello

Try to compile on me Powermac G4 simple hello world for running on me windows7 
64bit machine. after reading man g++/gcc this are possible with syntax -m64 if 
trying this i have following result from compiler. Or its this possible if me 
system not supporting the archidekture from 64Bit?

i think this options should be possible, please what are me mistake here?
the compilation with "-m32" are compiling fine but this don't run on me 
windows7 machine "not a valid 64bit"

powermac$ g++ -m64 ./helloworld.c
./helloworld.c:1: error: -m64 not supported in this configuration

-helloworld.c
#include <iostream.h>
main()
{
 cout << "Hello World" << endl;
 return 0;
}

powermac$ gcc --v
Using built-in specs.
Target: powerpc--netbsd
Configured with: /usr/src/tools/gcc/../../gnu/dist/gcc4/configure 
--enable-long-long
--disable-multilib --enable-threads --disable-symvers 
--build=x86_64-unknown-netbsd4.99.72
--host=powerpc--netbsd --target=powerpc--netbsd --enable-__cxa_atexit
Thread model: posix
gcc version 4.1.3 20080704 prerelease (NetBSD nb2 20081120)

NetBSD powermac.G4 5.1 NetBSD 5.1 (GENERIC) 

please what i need to do for any successful result.
thanks for any feedback
regards
mauri

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