错误：
方法一
在test.c中定义
//test.c
......
struct pdesc const cameractrl_params[] = {
{PT_STRI_, 1,OFFSET(cameractrl,homecmd),"homecmd",32,NULL,NULL}, {PT_STRI_,zoomctrl),"zoomctrl",focusctrl),"focusctrl",aperturectrl),"aperturectrl", {PT_NULL_, 0,"",NULL} /* PT_NULL means tail of struct pdesc array */
};
......在test.h中定义
//test.h
#ifndef _TEST_H_
#define _TEST_H_
......
extern struct pdesc const cameractrl_params[];
......
#endif
方法二
在test.h头文件中
变量前加static关键字