求解gcc编译c内联汇编标号报错的一个问题?报错

使用gcc编译c语言内联汇编使用-O优化时，是标号部分报错，请问有知道怎么解决的吗？

unsigned long strcpy0(char* dst,const char* src)
{
	__asm__ __volatile__
		(
		 ".intel_syntax noprefix\n"
		 "POS2:\n"
		 "lodsb\n"
		 "stosb\n"
		 "test al,al\n"
		 "jnz POS2\n"
		 :
		 :
		 :"rax","rbx"
		 );
}

gcc -masm=intel -O3 -c -o test.o test.c

test.c: Assembler messages:

test.c:7: Error: symbol `POS2' is already defined

test.c:7: Error: symbol `POS2' is already defined

test.c:7: Error: symbol `POS2' is already defined