How to use the function in "math.h" by xdc?

way

Hi,all! I am a new in Davince field.Currently I am working on immigrating the program(by c) to the DM6446 by xdc tools. I have to use the math.h in the program.When I compilered it, it shows that undefined reference 'sin'.

The c source for the function like:

#include <stdlib.h>
#include <math.h>
int main() { double a = sin (30.0); }
I used the xdc tools to compile. It says undefined reference 'sin'.
And I do have configurate the path which xdc needed.

Is any one body can provide better solution. your help will greatly appreciated. waiting for your messages and help。

over 16 years ago

0 Juan Gonzales over 16 years ago

TI__Mastermind 37340 points

Hi,

Are you trying to build this code for ARM (probably via command line on Linux host) or DSP side (probably via CCS)?

0 way over 16 years ago in reply to Juan Gonzales

Prodigy 40 points

I am trying to build this code for ARM.As you say I build this code via command line on linux host. Using the XDC(eXpress DSP Compoent) tools.

0 LorryAstra over 16 years ago in reply to way

Expert 1460 points

I suggest that you can check out "math.h" and find that whether "sin" function is existed. Yesterday I found a "math.h" which did not include "floor" or "ceil" function. So pls. check it out.

0 LorryAstra over 16 years ago in reply to LorryAstra

Expert 1460 points

Sorry, I forgot to add "-lm" as compile option. "floor" and "ceil" works well.

0 Flora Liu over 11 years ago in reply to LorryAstra

Prodigy 30 points

Hi, I met same issue as yours. Could you please tell me where to add -lm compiler option? in makefile or anywhere? Thanks!

0 Flora Liu over 11 years ago in reply to LorryAstra

Prodigy 30 points

I insert -lm option in makefile as below: but still got same error.

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How to use the function in "math.h" by xdc?