IAR环境，GD32F30xC，cmd.h的相关代码需要写成以下，才可以通过编译。亲试有效。

[shouzilai]

#pragma section = "CMDS" /* MUST */

#define CMD_HASH 0xb433e5c6

#if defined(__CC_ARM) || defined(__CLANG_ARM) /* ARM Compiler */
#define SECTION(x) attribute((section(x)))
#define CMD_USED attribute((used))

#elif defined (ICCARM) || defined(ICCRX) /* for IAR Compiler (Will Vaild in IAR ENV)*/
#define SECTION(x) @ x
#define CMD_USED __root
#else
#error "not supported tool chain..."
#endif