How to compile this program with inline asm?

How to compile this program with inline asm?

I cannot compile this program taken from a tutorial. It should print
"Hello World".
void main()
{
__asm__("jmp forward\n\t"
"backward:\n\t"
"popl %esi\n\t"
"movl $4, %eax\n\t"
"movl $2, %ebx\n\t"
"movl %esi, %ecx\n\t"
"movl $12, %edx\n\t"
"int $0x80\n\t"
"int3\n\t"
"forward:\n\t"
"call backward\n\t"
".string \"Hello World\\n\""
);
}
gcc 4.7 under Linux gives me the following error:
gcc hello.c -o hello
hello.c: Assembler messages:
hello.c:5: Error: invalid instruction suffix for `pop'
Is there also a way to avoid to specify double quotes for each line?
Also, I'd like to know how to modify the program to use libc call printf
instead of the kernel service.