的Blackfin GCC-工具链连接错误未定义参考`Ret_Add”

Question

继discution：

https://blackfin.uclinux.org/gf/project/uclinux-dist/forum/?_forum_action=ForumMessageBrowse&thread_id=46813&action=ForumBrowse&forum_id=39

我转换FFT算法中为VDSP编译裸机应用核B上运行，并且具有uclinux的运行核心答：我有一个链接错误，我不明白它来自哪里：

调用：'/opt/uClinux/bfin-elf/bin/../bfin-elf/bin/ld.real' '-v''-o''test_ad1836_driver''-T''coreb_test_ad1836_driver.lds''--just-symbol''../../icc_core/icc''queue.o''ezkit_561.o''heap_2 .o''port.o''tasks.o''test_ad1836_driver.o''list.o''croutine .o''u​​ser_isr.o''bfin_isr.o''app_c.o''context_sl_asm.o''cycle_count.o''CFFT_Rad4_NS_NBRev.o''--Ttext''0x3c00000''-L''/ opt/uClinux/bfin-elf/bfin-elf/lib''-L''/ opt/uClinux/bfin-elf/bfin-elf/lib''-lc' GNU ld version 2.17 cycle_count.o：功能Compute_Cycle_Count': /home/william/Development_new/Music_Recognition/code/uCLinux/uclinux-dist/user/blkfin-apps/icc_utils/example/DSP_imp/CFFT_Rad4_NS_NBRev/corea/cycle_count.asm:22: undefined reference to Ret_Add' /home/william/Development_new/Music_Recognition/code/uCLinux/uclinux-dist/user/blkfin-apps/icc_utils/example/DSP_imp/CFFT_Rad4_NS_NBRev/corea/cycle_count.asm:23：undefined reference to Ret_Add' /home/william/Development_new/Music_Recognition/code/uCLinux/uclinux-dist/user/blkfin-apps/icc_utils/example/DSP_imp/CFFT_Rad4_NS_NBRev/corea/cycle_count.asm:27: undefined reference to Save_R7' /home/william /Development_new/Music_Recognition/code/uCLinux/uclinux-dist/user/blkfin-apps/icc_utils/example/DSP_imp/CFFT_Rad4_NS_NBRev/corea/cycle_count.asm:28：undefined reference to Save_R7' /home/william/Development_new/Music_Recognition/code/uCLinux/uclinux-dist/user/blkfin-apps/icc_utils/example/DSP_imp/CFFT_Rad4_NS_NBRev/corea/cycle_count.asm:44: undefined reference to Save_R7' /home/william/Development_new/Music_Recognition /代码/ uCLinux的/ uclinux的 - 距离/用户/ blkfin-应用/ icc_ut ils/example/DSP_imp/CFFT_Rad4_NS_NBRev/corea/cycle_count.asm：45：undefined reference to Save_R7' /home/william/Development_new/Music_Recognition/code/uCLinux/uclinux-dist/user/blkfin-apps/icc_utils/example/DSP_imp/CFFT_Rad4_NS_NBRev/corea/cycle_count.asm:48: undefined reference to Ret_Add' /home/william/Development_new/Music_Recognition/code/uCLinux/uclinux-dist/user/blkfin-apps/icc_utils/example/DSP_imp/CFFT_Rad4_NS_NBRev /科雷亚/ cycle_count.asm：49：未定义参考`Ret_Add”

代码如下：

.section伪l1.data;
.align 4;
.var _Ret_Add = 0;
.var _Save_R7 = 0;

.section l1.text;
.global _Compute_Cycle_Count;
.align 8;
_Compute_Cycle_Count： P0.L = _Ret_Add;
P0.H = _Ret_Add;
R3 = RETS;
[P0] = R3;

P0.L = _Save_R7;              
    P0.H = _Save_R7;              
    [P0] = R7; 

........

感谢

威廉

Answer 1

你没有_Ret_Add和_Save_R7的声明在代码由GNU汇编理解。你应该端口从VDSP汇编到GNU ASM：

_Ret_Add: .int 0; 

也许如果你愿意把它向后兼容：

.if defined (__GNUC__) 
_Ret_Add: 
.int 0; 
.else 
.var _Ret_Add =0; 
.endif 

看看this。