关于CCS6.1引用快速浮点库的问题

工程中是否增加了库 工程属性中是不是也增加了搜索？

在你的工程中增加以下代码
#include <math.h>
#include <float.h>

#if DBL_MANT_DIG == FLT_MANT_DIG
float cosf(float x) { return cos(x); }
float sinf(float x) { return sin(x); }
float sqrtf(float x) { return sqrt(x); }
#endif

请您看一下 e2e.ti.com/.../569552 给出的回复

Add the following code somewhere in your program.

#include <math.h>
#include <float.h>

#if DBL_MANT_DIG == FLT_MANT_DIG
float cosf(float x) { return cos(x); }
float sinf(float x) { return sin(x); }
float sqrtf(float x) { return sqrt(x); }
#endif

The reason you are getting this error is because your program uses both sqrt and sqrtf somewhere. It might not be immediately obvious where sqrtf is called; perhaps it is in a library function like printf. Now that the compiler library supports C99, we support not just sqrt, but also sqrtf and sqrtl. For every target TI supports, one of sqrtf or sqrtl is just an alias for sqrt, and is defined in the same file. You've replaced sqrt, but the linker still needs sqrtf, so it must drag in the object file which defines sqrtf, which also contains sqrt, and now you've got duplicate definitions of sqrt. So, when you replace sqrt, you must also replace its alias (in this case sqrtf, because for C2000 COFF, double is 32 bits).

The rule of thumb: if you replace sqrt, you must also replace sqrtf and sqrtl.

谢谢您就是这个原因！

这个能够解决问题,下面的回答给出了原因，十分感谢

很高兴您能解决问题！