Mex libraries for accessing matlab code from C++

Hi Matlab experts,

I am new to the forum, so any help will be highly appreciated. I am using a C++ code, which calls functions from Matlab, using the engine:

#include "engine.h"

and uses Engine *ep, to call functions like: mxCreateDoubleMatrix(), engPutVariable(), etc., and computes a cholesky decomposition: engEvalString(ep, "U=chol(T);");.

The C++ code I am working on is from 2002, and uses Matlab R13, Linux version. It accesses the following libraries from the Makefile:

INCLUDE= -I/apps/common/matlab/R13/Linux/extern/include

LIBS= -L/apps/common/matlab/R13/Linux/extern/lib/glnx86 -lmx -lut -lmat -leng

The problem is that when I try to use a newer version of Matlab, such as 2009a on an Ubuntu machine, the libraries -lmx -lut -lmat -leng are no longer existent. Currently, without these, I get these errors (I do include the "engine.h" file):

./src/monte.cpp: In member function ‘bool CMonte::CalChol(Engine*, double*, std::vector<EleDecomp, std::allocator<EleDecomp> >*&)’:

./src/monte.cpp:346: error: ‘mxSetName’ was not declared in this scope

./src/monte.cpp:349: error: ‘memcpy’ was not declared in this scope

Please let me know if anyone has some experience with this. It will be highly helpful for me. Thanks,

Saket Gupta

Answer 1

[Ken Atwell]

Saket,

Those libraries still exist, but they would be at a different location in R2009a:

• The INCLUDE directory will likely be at a place like /usr/local/matlab/R2009a/extern/include.
• The LIBS directory will likely be at a place like /usr/local/matlab/R2009a/bin/glnxa64 (64-bit bit), or glnx86 (32-bit)

if you run MEX from within MATLAB with the -v switch, it will spit out verbose information, including the directory paths you need to specify with -I and -L

[Saket Gupta]

Thanks Ken! It works now.