Support:Tech notes

Mex and compiler setting

How to set up mex compiler on a 64-bit Matlab using Visual Studio 2008 Professional

1. I was using Visual Studio 2008 Profession that is free for college students. I believe 2008 Express works the same way, too.
2. When you install Visual Studio 2008, I recommend to install 'Full' so that you are sure the 64-bit compilers and libraries are installed.
3. Go to http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=18508&objectType=file. Download, uncompress and copy the x64 mex option files under the MATLABROOT\bin\win64\mexopts.
4. Do a mex -setup. Let Matlab locate the installed compiler. Select "Microsoft Visual C++ 2008".
5. Use mex command to compile a simple file. You get the following error

C:\PROGRA~1\MATLAB\R2007B\BIN\MEX.PL:  
Error: Using options file: 
         C:\Users\deancool\AppData\Roaming\MathWorks\MATLAB\R2007b\mexopts.bat 
         You cannot use this file with the WIN64 architecture because it enables 
         a compiler for a different architecture. 
         Running mex -setup may resolve this problem. 

To fix this error:

1. Locate your mexopts.bat file. Edit the following lines:
   1. Line 17 (set PATH): add '\amd64' after set PATH=%VCINSTALLDIR%\BIN\
   2. Line 19 (set LIB): add '\amd64' after set LIB=%VCINSTALLDIR%\ATLMFC\LIB and %VCINSTALLDIR%\LIB. Add '\x64' after C:\Program Files\Microsoft SDKs\Windows\v6.0A\lib
   3. Line 20: set MW_TARGET_ARCH=win64
   4. Line 34: set LIBLOC=%MATLAB%\extern\lib\win64\microsoft
   5. Line 36: /MACHINE:X64

NOTE: Environment - Windows Vista 64-bit, Matlab 2007b 64-bit. My mexopts.bat file: File:Mexopts.zip

How to set up the C compiler from Visual Studio 2008 on a 64-bit Windows system

1. Go to control->system->environmental variables. Edit 'path' and add the following dir: C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\bin\amd64
2. Go to control->system->environmental variables. Edit 'LIB' and add the following dir: C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\lib\amd64

Or go to C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\bin\amd64 and run vcvarsamd64.bat

How to compile cvOdesGenMod5.c

Windows

1. Enter COMKATROOT\CVODESserial-2.3.0-2005\sundials\cvodes\source. Run:

cl /c /I..\include /I..\..\shared\include *.c
lib /out:cvodes.lib *.obj

Copy cvodes.lib to the COMKATROOT\lib\win64 folder (change win64 according to your system) 2. Enter COMKATROOT\CVODESserial-2.3.0-2005\sundials\shared\source. Run:

cl /c /I..\include  *.c
lib /out:sundials.lib *.obj

Copy sundials.lib to the COMKATROOT\lib\win64 folder (change win64 according to your system) 3. Enter COMKATROOT\CVODESserial-2.3.0-2005\sundials\nvec_ser. Run

cl /c /I..\shared\include  *.c
lib /out:nvec_ser.lib *.obj

Copy nvec_ser.lib to the COMKATROOT\lib\win64 folder (change win64 according to your system)

Linux

NOTE: Under 64-bit Ubuntu and 64-bit Matlab, you have to do the following changes to make the mex compilation work. 1. Edit the mexopts.sh and remove all -lstdc++ 2. Edit the cvodesGenmod5.c. Find function 'clear' and remove the 'static' declaration. 3. When you use gcc to compile, add a flag '-fPIC'.