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Anonymous
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C:\Users\PC-ASUS\Documents\WICED\WICED-Smart-SDK-2.2.0\WICED-Smart-SDK\Wiced-Smart\spar/../../Apps/wiced_sense/wiced_sense.c:1267: undefined reference to `sqrt'

1 Solution
7 Replies
Anonymous
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i have the same problem all the mathematic functions doesn't work i think there's a problem in the links

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Anonymous
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Hello,

I am trying to use math functions as well and I am also getting errors such as:

undefined reference to `sqrt'

undefined reference to `__aeabi_i2f'

undefined reference to `__aeabi_fmul'


Could you explain how you managed to use math functions included in math.h ?

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Anonymous
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yes i didn't find the way to use that functions even with an external libraries so i used another function that calculate the sqrt only with integers and i multiple the input value (*10,100..) of the function to have the sensibility that i want to get then i devied the output this is the only way i found , the wiced smart sdk do not support floats

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Anonymous
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this is the code :

#define NEXT(n, i)  (((n) + (i)/(n)) >> 1)

  int abso (int n)

  {

      if (n<0) return (-n);

      else return n ;

  }

  unsigned int isqrt(int number) {

  unsigned int n  = 1;

  unsigned int n1 = NEXT(n, number);

   while(abso(n1 - n) > 1) {

     n  = n1;

     n1 = NEXT(n, number);

   }

   while(n1*n1 > number)

     n1--;

   return n1;

  }

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Anonymous
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Thanks for your quick replies!

Besides sqrt, I also need some trigonometric functions, so I will probably look into libfixmath.

Best regards

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