Ciao a tutti...
non riesco a compilare nessun programma in C con g++, cosa devo fare? Ecco cosa succede

codice:
$ gcc -o spalatori.o spalatori.c
spalatori.c:7:2: warning: no newline at end of file
$ gcc -o spalatori spalatori.o
spalatori.o:(.rodata+0x0): multiple definition of `_fp_hw'
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../lib/crt1.o:(.rodata+0x0): first defined here
spalatori.o: In function `__data_start':
(.data+0x4): multiple definition of `__dso_handle'
/usr/lib/gcc/i486-linux-gnu/4.1.2/crtbegin.o:(.data+0x0): first defined here
spalatori.o: In function `_init':
/build/buildd/glibc-2.4/build-tree/i386-libc/csu/crti.S:36: multiple definition of `_init'
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../lib/crti.o:/build/buildd/glibc-2.4/build-tree/i386-libc/csu/crti.S:36: first defined here
spalatori.o: In function `_start':
(.text+0x0): multiple definition of `_start'
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../lib/crt1.o:(.text+0x0): first defined here
spalatori.o: In function `_fini':
/build/buildd/glibc-2.4/build-tree/i386-libc/csu/crti.S:52: multiple definition of `_fini'
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../lib/crti.o:/build/buildd/glibc-2.4/build-tree/i386-libc/csu/crti.S:52: first defined here
spalatori.o:(.rodata+0x4): multiple definition of `_IO_stdin_used'
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../lib/crt1.o:(.rodata.cst4+0x0): first defined here
spalatori.o: In function `__data_start':
(.data+0x0): multiple definition of `__data_start'
/usr/lib/gcc/i486-linux-gnu/4.1.2/../../../../lib/crt1.o:(.data+0x0): first defined here
collect2: ld returned 1 exit status
eppure il programma è un semplice ciao mondo

codice:
#include <stdio.h>

int main()
{
	printf("Ciao mondo");
	return 0;
}
suggerimenti? grazie e ciao