MATLAB: Do I get the error “Cannot open include file: ‘math.h'” when trying to compile a model using MSVC 2005 and Simulink 7.3 (R2009a)

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I am trying to compile the demo model "xpcosc" for xPC Target using the MSVC 2005 compiler. Using the xPC Target Explorer (xpcexplr), I selected the Visual C compiler located in the following folder:

C:\Program Files\Microsoft Visual Studio 8

When I then try to build the model (Ctrl+B), I get the following error:

 c:\temp\xpcocs\xpcosc_xpc_rtw\xpcosc.h(22) : fatal error C1083: Cannot open include file: 'math.h': No such file or directory
 NMAKE : fatal error U1077: '"c:\program files\microsoft visual studio 8\VC\BIN\cl.EXE"' : return code '0x2'
 Stop.

Best Answer

This seems to be an issue in MSVC 2005, in the way that the file "math.h" is not present in a necessary "include" folder.

To work around this issue, copy the math.h file from the folder:

C:\Program Files\Microsoft Visual Studio 8\VC\crt\src\math.h

... to the following:

C:\Program Files\Microsoft Visual Studio 8\VC\include

Related Solutions

MATLAB: Do I receive a “cannot open file ‘dformd.lib'” fatal error when trying to use the MEX command with the Compaq Visual Fortran 6.6 compiler

This error results from the Compaq Visual Fortran compiler not being installed with the proper file folder arrangement.

The recommended file arrangement for the Compaq Visual Fortran compiler is as follows:

 Developer Studio Files:  C:\Program Files\Microsoft Visual Studio\Common
 Visual Fortran Files:  C:\Program Files\Microsoft Visual Studio\Df98
 Shared Visual C++ Files:  C:\Program Files\Microsoft Visual Studio\VC98

For more information, see Hewlett-Packard's website on Fortran compilers:

www.hp.com/go/fortran

MATLAB: Am I unable to select the Microsoft Visual Studio Visual C++ compiler in MATLAB

This can happen if Microsoft Visual Studio Visual C++ compiler is installed in a non-default directory. The mex options file looks for MSVC 8.0 in a directory relative to the environment variable VS80COMNTOOLS and MSVC 7.1 in a directory relative to the environment variable VS71COMNTOOLS.

You can find out what this environment variable is set to by using the following command at the MATLAB command prompt

getenv VS80COMNTOOLS

getenv VS71COMNTOOLS

If the environment variable for the appropriate compiler does not exist, you will need to either re-install Microsoft Visual Studio or create the environment variable manually. It needs to point to the Common7\Tools\ sub directory of your Microsoft Visual Studio installation. This is often located at:

C:\Program Files\Microsoft Visual Studio 8\Common7\Tools\

C:\Program Files\Microsoft Visual Studio .NET 2003\Common7\Tools\

Microsoft Visual C++ should be installed in a directory called “VC” (for MSVC 8.0) or "VC7" (for MSVC 7.1). This directory should be located two directories above the directory specified by VS80COMNTOOLS or VS71COMNTOOLS. If this is not the case, the setup will not be able to locate your compiler automatically. For example if VS80COMNTOOLS is set to:

C:\Program Files\Microsoft Visual Studio 8\Common7\Tools\

then Microsoft Visual C++ is expected to be located at

C:\Program Files\Microsoft Visual Studio 8\VC

You can either re-install Microsoft Visual Studio in this arrangement or do the following (example given for MSVC 8.0):

1. When prompted: "Would you like mex to locate installed compilers [y]/n?" type "n".

2. Select "Microsoft Visual C/C++ version 8.0"

3. When prompted: "Use C:\Program Files\Microsoft Visual Studio 8 anyway [y]/n?" type "n"

4. Enter the correct path to Microsoft Visual Studio, i.e. "C:\MYCOMPILERDIR\Microsoft Visual Studio 8".

Best Answer

Related Solutions

MATLAB: Do I receive a “cannot open file ‘dformd.lib'” fatal error when trying to use the MEX command with the Compaq Visual Fortran 6.6 compiler

MATLAB: Am I unable to select the Microsoft Visual Studio Visual C++ compiler in MATLAB

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