Qt Project & Matlab Engine (Linux 64 bits)

avmg

Hi everyone,

I'm trying to use Matlab Engine (Matlab R2013a) in a Qt Project (Qt 5.2.0, GCC 4.6.1, 64 bit). My GCC version is 4.7.3 and Matlab documents says compatible with 4.4.X, but i read about this and looks like it's compatible. I found many solutions for Windows but any one clear enought for Linux 64 bits. I set the run-time library path in the Qt build environment:

LD_LIBRARY_PATH=matlabroot/bin/glnxa64:matlabroot/sys/os/glnxa64

I tried to add also the shared libraries: libmat.so, libmx.so and libeng.so but i'm not sure if it is well done.

This is my .pro file:

@QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = ahrs_libusb
TEMPLATE = app

SOURCES += main.cpp
ahrs.cpp

HEADERS += ahrs.h

FORMS += ahrs.ui

LIBS += -lusb
unix:LIBS += -lusb

LIBS += -L /usr/local/MATLAB/R2013a/bin/glnxa64/
/usr/local/MATLAB/R2013a/bin/glnxa64/libmat.so
/usr/local/MATLAB/R2013a/bin/glnxa64/libmx.so
/usr/local/MATLAB/R2013a/bin/glnxa64/libeng.so

INCLUDEPATH += /usr/local/MATLAB/R2013a/extern/include@

And this is the test when create the form:

@Engine * ep = engOpen (NULL);
if (!ep)
{
    ui->qTEstatus->append("Can start Matlab engine!");
}@

Actually i compile and i get these two errors:

/usr/local/MATLAB/R2013a/sys/os/glnxa64/libstdc++.so.6:-1: error: version `GLIBCXX_3.4.15' not found (required by /usr/lib/x86_64-linux-gnu/libppl_c.so.4)

and

/usr/local/MATLAB/R2013a/sys/os/glnxa64/libstdc++.so.6:-1: error: version `GLIBCXX_3.4.15' not found (required by /usr/lib/x86_64-linux-gnu/libppl.so.12)

I spend much time but without any solution...

Thanks,
Andrew.

avmg

Hi again,

Finally, I found an easy way to solve the problem by linking the correct library file with the MATLAB firstly searched old library file, i.e.,

sudo ln -sf /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.17 /usr/local/MATLAB/R2013a/bin/glnxa64/libstdc++.so.6

Now the program compile but the Matlab Engine doesn't run because the function: engOpen(NULL) returns 0x00

Any idea??

pranavladkat

Can you guide me linking matlab's engine.h to qt?

I have 64bit versions of both ubuntu(12.04) and qt(5.2.1)

I'm able to compile the code with engine.h included in the program but I get the following error:
MATLAB: Command not found

Any ideas?

my .pro file is:
@TEMPLATE = app
CONFIG += console
CONFIG -= app_bundle
CONFIG -= qt
INCLUDEPATH += "/usr/local/MATLAB/MATLAB_Production_Server/R2013a/extern/include"

LIBS += -llapack -lblas -larmadillo -L"/usr/local/MATLAB/MATLAB_Production_Server/R2013a/bin/glnxa64" -leng -lmat -lmex -lmx -Wl,-rpath=/usr/local/MATLAB/MATLAB_Production_Server/R2013a/bin/glnxa64

SOURCES += main.cpp@

and using a simple program to test the connectivity.

I have define the PATH variable. But I'm doubtful about the way I have defined LD_LIBRARY_PATH

Can you please elaborate how you were able to link matlab to qt?

Thanks,
Pranav