Simulink Compiler - Max block not finding fmax?

Question

B. J. 2011-6-21

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/9949-simulink-compiler-max-block-not-finding-fmax

Hi Everyone,

I am running 2011a discrete fixed-sized solver. I am trying to compile a target file of ert.tlc for C++.

I get the error TestMax.cpp TestMax.cpp(38) : error C3861: 'fmax': identifier not found NMAKE : fatal error U1077: '"D:\Program Files\VC\bin\cl.EXE"' : return code '0x2' Stop. The make command returned an error of 2 'An_error_occurred_during_the_call_to_make' is not recognized as an internal or external command, operable program or batch file. ### Build procedure for model: 'TestMax' aborted due to an error.}

Relating to the proper .cpp file, it is this:

   /* Outport: '<Root>/Out1' incorporates:
    *  Constant: '<Root>/Constant5'
    *  DiscreteTransferFcn: '<Root>/Discrete Transfer Fcn'
    *  MinMax: '<Root>/MinMax1'
    */
   TestMax_Y.Out1 = fmax(0.0198 * TestMax_DWork.DiscreteTransferFcn_DSTATE, 2.0);

I have a max block selecting the output of a discrete tf and a constant. I can probably reconfigure it with a switch case, but I want to know why it is not working. I have been using the model adviser to no errors.

thanks in advance, B.

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B. J. 2011-6-21

Hi Kaustubha,

In my code generation interface I have my target function defined as C++ (ISO). Changing it to C89/C90 did work! Thanks!

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Answer 1

Kaustubha Govind 2011-6-21

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/9949-simulink-compiler-max-block-not-finding-fmax#answer_13671

Do you have C99 (ISO) selected as the Target function library in the Code Generation > Interface pane of your Configuration Parameters window? If yes, it is likely that your version of Visual Studio does not support the C99 standard. Switch to the default "C89/C90 (ANSI)" target function library and see if you are able to build the model.