CodeWarrior for MCUのトピックRe: Problem with the math.h standard library

Problem with the math.h standard library

flofa — Fri, 03 Nov 2017 18:03:20 GMT

Hello everybody,

I am working on the MPC5643L using the tool CW10.5.

In one project I have to use some of the functions of the math.h.

The functions I use are the "floorf" and the "fmodf".

But than compiler produces the following errors:

-undefined: 'floorf' Referenced from 'Simulink_Task_1ms' in WST_c.obj

-undefined: 'fmodf' Referenced from 'Simulink_Task_1ms' in WST_c.obj

I´m not sure what´s wrong, cause I included the math.h in the source file. I also added the ewl-directory into the include directories of the project.

But I seem that the math.h isn´t translated correctly cause of some missing preprocessor macros. For example the macro "_EWL_C99" is missing. And I can´t define them correctly.

Do I have to change another project settings or attach another prefix-file to the project?

Or is it generally possible to use the ewl-libraries with the MPC5643L?

Thanks for your help.

Best regards

Florian.

Re: Problem with the math.h standard library

martin_kovar — Tue, 07 Nov 2017 12:56:54 GMT

Hello Florian,

I created simple project, but I am not able to reproduce the issue on my side. Could you please create simple example which demonstrates your issue and attach it to this post?

Regards,

Martin

Re: Problem with the math.h standard library

flofa — Wed, 15 Nov 2017 07:37:41 GMT

Hi Martin,

thanks for the answer.

I could solve that Issue.

I excluded the "libc_E200z446_VLE_SPFP_Only.a" library from the project. I think the "math.h" is part of that library. And that was the reason why it didn´t work.

After re-including the library it works fine.

Thanks for your help.

Best regards

Florian.