在include/asm/mach/blackfin.h文件中，有这样的语句：
#include "bf561.h"
#include "mem_map.h"
#include "defbf561.h"
#include "anomaly.h"
当在asm文件中包含这个头文件时，将引起以下错误：
[error pp0051"> "....includeasm/mach/blackfin.h":36 failed to open '#include' file 'bf561.h'
[error pp0051"> "....includeasm/mach/blackfin.h":37 failed to open '#include' file 'mem_map.h'
[error pp0051"> "....includeasm/mach/blackfin.h":39 failed to open '#include' file 'anomaly.h'
preprocessor finished with 3 error(s) 0 warning(s)
[error ea1088"> previous errors in pre-processing prevent assembly.
实际上，错误提示的这三个文件都和blackfin.h放在同一个目录下，出错的原因是vdsp的汇编器不识别用双引号指定的包含文件，因而需要将之修改为：
#include
#include
#include "defbf561.h"
#include
这个文件在c中包含则没有问题。
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