Prev: access data from whole cell array
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From: Austriker Serrat on 23 Feb 2010 10:48
Hello,

I am triyng to implement Matlab in a c++ program. http://www.cl.cam.ac.uk/~sjeh3/wii/
The application is using gtk a wii mote lib and the Matlab Camera Calibration Toolbox (http://www.vision.caltech.edu/bouguetj/calib_doc/). it works perfectly.
I want to use matlab ploting tools to build a graphic provided by the application. But i am having issues building the app with matlab engine .
Even with the examples like engdemo.cpp i always have this error :

mex: link of ' "...mexa64"' failed.

does somebody has an idea ?
here are the console views:


root(a)ubuntu:/home/hugo/Bureau/sjeh3-wii/wmgui# ./build2
----------------------------------------------------------------
-> mbuildopts.sh sourced from directory (DIR = $HOME/.matlab/$REL_VERSION)
FILE = /root/.matlab/R2009b/mbuildopts.sh
----------------------------------------------------------------
-> TMW_ROOT = /home/hugo/Matlab
-> CC = g++-4.1
-> CC flags:
CFLAGS = -ansi -D_GNU_SOURCE -I/home/hugo/Matlab/extern/include/cpp -I/home/hugo/Matlab/extern/include -DUNIX -DX11 -DGLNXA64 -DGCC -pthread
CDEBUGFLAGS = -g
COPTIMFLAGS = -O -DNDEBUG
CLIBS = -Wl,-rpath-link,/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/runtime/glnxa64 -lmwmclmcrrt -lm
arguments =
-> LD = g++-4.1
-> Link flags:
LDFLAGS = -pthread
LDDEBUGFLAGS = -g
LDOPTIMFLAGS = -O
arguments = -L/usr/lib/ -L../toolbox -L../libcwiid -L../libcwiid -L/opt/gnome/lib64 -L/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/extern/include -L../../matlablibtest/toolbox
----------------------------------------------------------------

-> g++-4.1 -c -I/usr/include/cairo -I/usr/include/freetype2 -I/usr/include/libpng12 -I/opt/gnome/include/gtk-2.0 -I/usr/include/gtk-2.0 -I/usr/include/atk-1.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/lib/gtk-2.0/include -I../libcwiid -I../toolbox -I/opt/matlab/extern/include -I/usr/lib -I/home/hugo/Matlab/extern/include -I/home/hugo/Matlab/bin/glnxa64 -ansi -D_GNU_SOURCE -I/home/hugo/Matlab/extern/include/cpp -I/home/hugo/Matlab/extern/include -DUNIX -DX11 -DGLNXA64 -DGCC -pthread -g "main.cpp"

-> g++-4.1 -c -I/usr/include/cairo -I/usr/include/freetype2 -I/usr/include/libpng12 -I/opt/gnome/include/gtk-2.0 -I/usr/include/gtk-2.0 -I/usr/include/atk-1.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/lib/gtk-2.0/include -I../libcwiid -I../toolbox -I/opt/matlab/extern/include -I/usr/lib -I/home/hugo/Matlab/extern/include -I/home/hugo/Matlab/bin/glnxa64 -ansi -D_GNU_SOURCE -I/home/hugo/Matlab/extern/include/cpp -I/home/hugo/Matlab/extern/include -DUNIX -DX11 -DGLNXA64 -DGCC -pthread -g "interface.cpp"

-> g++-4.1 -c -I/usr/include/cairo -I/usr/include/freetype2 -I/usr/include/libpng12 -I/opt/gnome/include/gtk-2.0 -I/usr/include/gtk-2.0 -I/usr/include/atk-1.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/lib/gtk-2.0/include -I../libcwiid -I../toolbox -I/opt/matlab/extern/include -I/usr/lib -I/home/hugo/Matlab/extern/include -I/home/hugo/Matlab/bin/glnxa64 -ansi -D_GNU_SOURCE -I/home/hugo/Matlab/extern/include/cpp -I/home/hugo/Matlab/extern/include -DUNIX -DX11 -DGLNXA64 -DGCC -pthread -g "support.cpp"

-> g++-4.1 -g -pthread -L/usr/lib/ -L../toolbox -L../libcwiid -L../libcwiid -L/opt/gnome/lib64 -L/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/extern/include -L../../matlablibtest/toolbox -o wmgui main.o interface.o support.o -Wl,-rpath-link,/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/runtime/glnxa64 -lmwmclmcrrt -lm -lcalib -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgdk_pixbuf-2.0 -lpangocairo-1.0 -lpango-1.0 -lcairo -lgobject-2.0 -lgmodule-2.0 -ldl -lfreetype -lz -lfontconfig -lexpat -lglitz -lm -lpng12 -lXrender -lX11 -lpthread -lXau -lXdmcp -lgthread-2.0 -lglib-2.0 -lm -lcwiid

main.o: In function `main':
/home/hugo/Bureau/sjeh3-wii/wmgui/main.cpp:363: undefined reference to `engOpen'
/home/hugo/Bureau/sjeh3-wii/wmgui/main.cpp:367: undefined reference to `engEvalString'
collect2: ld returned 1 exit status

mbuild: link of 'wmgui' failed.

root(a)ubuntu:/home/hugo/Bureau/sjeh3-wii/wmgui# ./build2
-> mexopts.sh sourced from directory (DIR = $HOME/.matlab/$REL_VERSION)
FILE = /root/.matlab/R2009b/mexopts.sh
----------------------------------------------------------------
-> MATLAB = /home/hugo/Matlab
-> CC = gcc-4.1
-> CC flags:
CFLAGS = -ansi -D_GNU_SOURCE -fexceptions -fPIC -fno-omit-frame-pointer -pthread
CDEBUGFLAGS = -g
COPTIMFLAGS = -O -DNDEBUG
CLIBS = -Wl,-rpath-link,/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/bin/glnxa64 -lmx -lmex -lmat -lm -lstdc++
arguments = -DMX_COMPAT_32
-> CXX = g++-4.1
-> CXX flags:
CXXFLAGS = -ansi -D_GNU_SOURCE -fPIC -fno-omit-frame-pointer -pthread
CXXDEBUGFLAGS = -g
CXXOPTIMFLAGS = -O -DNDEBUG
CXXLIBS = -Wl,-rpath-link,/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/bin/glnxa64 -lmx -lmex -lmat -lm
arguments = -DMX_COMPAT_32
-> FC = g95
-> FC flags:
FFLAGS = -fexceptions -fPIC -fno-omit-frame-pointer
FDEBUGFLAGS = -g
FOPTIMFLAGS = -O
FLIBS = -Wl,-rpath-link,/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/bin/glnxa64 -lmx -lmex -lmat -lm
arguments = -DMX_COMPAT_32
-> LD = g++-4.1
-> Link flags:
LDFLAGS = -pthread -shared -Wl,--version-script,/home/hugo/Matlab/extern/lib/glnxa64/mexFunction.map -Wl,--no-undefined
LDDEBUGFLAGS = -g
LDOPTIMFLAGS = -O
LDEXTENSION = .mexa64
arguments = -lang cpp -L/usr/lib/ -L../toolbox -L../libcwiid -lcalib -L../libcwiid -L/opt/gnome/lib64 -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgdk_pixbuf-2.0 -lpangocairo-1.0 -lpango-1.0 -lcairo -lgobject-2.0 -lgmodule-2.0 -ldl -lfreetype -lz -lfontconfig -lexpat -lglitz -lm -lpng12 -lXrender -lX11 -lpthread -lXau -lXdmcp -lgthread-2.0 -lglib-2.0 -lm -lcwiid -L/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/extern/include -L../../matlablibtest/toolbox
-> LDCXX =
-> Link flags:
LDCXXFLAGS =
LDCXXDEBUGFLAGS =
LDCXXOPTIMFLAGS =
LDCXXEXTENSION =
arguments = -lang cpp -L/usr/lib/ -L../toolbox -L../libcwiid -lcalib -L../libcwiid -L/opt/gnome/lib64 -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgdk_pixbuf-2.0 -lpangocairo-1.0 -lpango-1.0 -lcairo -lgobject-2.0 -lgmodule-2.0 -ldl -lfreetype -lz -lfontconfig -lexpat -lglitz -lm -lpng12 -lXrender -lX11 -lpthread -lXau -lXdmcp -lgthread-2.0 -lglib-2.0 -lm -lcwiid -L/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/extern/include -L../../matlablibtest/toolbox
----------------------------------------------------------------

-> g++-4.1 -c -I/usr/include/cairo -I/usr/include/freetype2 -I/usr/include/libpng12 -I/opt/gnome/include/gtk-2.0 -I/usr/include/gtk-2.0 -I/usr/include/atk-1.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/lib/gtk-2.0/include -I../libcwiid -I../toolbox -I/opt/matlab/extern/include -I/usr/lib -I/home/hugo/Matlab/extern/include -I/home/hugo/Matlab/bin/glnxa64 -I/home/hugo/Matlab/extern/include -I/home/hugo/Matlab/simulink/include -DMATLAB_MEX_FILE -ansi -D_GNU_SOURCE -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_32 -g "main.cpp"

-> g++-4.1 -c -I/usr/include/cairo -I/usr/include/freetype2 -I/usr/include/libpng12 -I/opt/gnome/include/gtk-2.0 -I/usr/include/gtk-2.0 -I/usr/include/atk-1.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/lib/gtk-2.0/include -I../libcwiid -I../toolbox -I/opt/matlab/extern/include -I/usr/lib -I/home/hugo/Matlab/extern/include -I/home/hugo/Matlab/bin/glnxa64 -I/home/hugo/Matlab/extern/include -I/home/hugo/Matlab/simulink/include -DMATLAB_MEX_FILE -ansi -D_GNU_SOURCE -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_32 -g "interface.cpp"

-> g++-4.1 -c -I/usr/include/cairo -I/usr/include/freetype2 -I/usr/include/libpng12 -I/opt/gnome/include/gtk-2.0 -I/usr/include/gtk-2.0 -I/usr/include/atk-1.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/lib/gtk-2.0/include -I../libcwiid -I../toolbox -I/opt/matlab/extern/include -I/usr/lib -I/home/hugo/Matlab/extern/include -I/home/hugo/Matlab/bin/glnxa64 -I/home/hugo/Matlab/extern/include -I/home/hugo/Matlab/simulink/include -DMATLAB_MEX_FILE -ansi -D_GNU_SOURCE -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_32 -g "support.cpp"

-> g++-4.1 -g -pthread -shared -Wl,--version-script,/home/hugo/Matlab/extern/lib/glnxa64/mexFunction.map -Wl,--no-undefined -o "wmgui.mexa64" main.o interface.o support.o -lang cpp -L/usr/lib/ -L../toolbox -L../libcwiid -lcalib -L../libcwiid -L/opt/gnome/lib64 -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgdk_pixbuf-2.0 -lpangocairo-1.0 -lpango-1.0 -lcairo -lgobject-2.0 -lgmodule-2.0 -ldl -lfreetype -lz -lfontconfig -lexpat -lglitz -lm -lpng12 -lXrender -lX11 -lpthread -lXau -lXdmcp -lgthread-2.0 -lglib-2.0 -lm -lcwiid -L/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/extern/include -L../../matlablibtest/toolbox -Wl,-rpath-link,/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/bin/glnxa64 -lmx -lmex -lmat -lm

g++-4.1: cpp: Aucun fichier ou dossier de ce type

mex: link of ' "wmgui.mexa64"' failed.


#!/bin/sh
(mex or mbuild) -v -g -output wmgui main.cpp interface.cpp support.cpp -lang cpp \
-L/usr/lib/ -L../toolbox -L../libcwiid -lcalib -L../libcwiid -L/opt/gnome/lib64 -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgdk_pixbuf-2.0 -lpangocairo-1.0 -lpango-1.0 -lcairo -lgobject-2.0 -lgmodule-2.0 -ldl -lfreetype -lz -lfontconfig -lexpat -lglitz -lm -lpng12 -lXrender -lX11 -lpthread -lXau -lXdmcp -lgthread-2.0 -lglib-2.0 -lm -lcwiid -L/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/extern/include -L../../matlablibtest/toolbox \
-I/usr/include/cairo -I/usr/include/freetype2 -I/usr/include/libpng12 -I/opt/gnome/include/gtk-2.0 -I/usr/include/gtk-2.0 -I/usr/include/atk-1.0 -I/usr/include/pango-1.0 -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/lib/gtk-2.0/include -I../libcwiid -I../toolbox -I/opt/matlab/extern/include -I/usr/lib -I/home/hugo/Matlab/extern/include -I/home/hugo/Matlab/bin/glnxa64

Sincerely,
Hugo
From: Hugo Serrat on 23 Feb 2010 12:08
I forgot to say that i wanted to use Matlab engine and not my c++ application in matlab. maybe it wasn't so clear. I don't think the program will work as a mex-file.

for the main script modification i just added engine.h and an extract from engdemo.c in the main function.

Sincerely
hugo
From: Hugo Serrat on 24 Feb 2010 05:25
I searched on the net but there isn't any useful link. the same questions where asked on the central newsgroup but there isn't any answer. so i tried to do this maybe it will give an idea to somebody :

root(a)ubuntu:/home/hugo/Bureau# mex -v -g engdemo.c
-> mexopts.sh sourced from directory (DIR = $HOME/.matlab/$REL_VERSION)
FILE = /root/.matlab/R2009b/mexopts.sh
----------------------------------------------------------------/Matlab/bin/glnxa64 -L/home/hugo/Matlab-> MATLAB = /home/hugo/Matlab
-> CC = gcc-4.1b/extern/include -I/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Ma-> CC flags:
CFLAGS = -ansi -D_GNU_SOURCE -fexceptions -fPIC -fno-omit-frame-pointer -pthread CDEBUGFLAGS = -g
COPTIMFLAGS = -O -DNDEBUGlab/extern/include -I/home/hugo/Matlab/bin/glnxa64 -L/ CLIBS = -Wl,-rpath-link,/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/bin/glnxa64 -lmx -lmex -lmat -lm -lstdc++
arguments = -DMX_COMPAT_32
-> CXX = g++-4.1
-> CXX flags:
CXXFLAGS = -ansi -D_GNU_SOURCE -fPIC -fno-omit-frame-pointer -pthread
CXXDEBUGFLAGS = -g
CXXOPTIMFLAGS = -O -DNDEBUG
CXXLIBS = -Wl,-rpath-link,/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/bin/glnxa64 -lmx -lmex -lmat -lm
arguments = -DMX_COMPAT_32
-> FC = g95
-> FC flags:
FFLAGS = -fexceptions -fPIC -fno-omit-frame-pointer
FDEBUGFLAGS = -g
FOPTIMFLAGS = -O
FLIBS = -Wl,-rpath-link,/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/bin/glnxa64 -lmx -lmex -lmat -lm
arguments = -DMX_COMPAT_32
-> LD = gcc-4.1
-> Link flags:
LDFLAGS = -pthread -shared -Wl,--version-script,/home/hugo/Matlab/extern/lib/glnxa64/mexFunction.map -Wl,--no-undefined
LDDEBUGFLAGS = -g
LDOPTIMFLAGS = -O
LDEXTENSION = .mexa64
arguments =
-> LDCXX =
-> Link flags:
LDCXXFLAGS =
LDCXXDEBUGFLAGS =
LDCXXOPTIMFLAGS =
LDCXXEXTENSION =
arguments =
----------------------------------------------------------------

-> gcc-4.1 -c -I/home/hugo/Matlab/extern/include -I/home/hugo/Matlab/simulink/include -DMATLAB_MEX_FILE -ansi -D_GNU_SOURCE -fexceptions -fPIC -fno-omit-frame-pointer -pthread -DMX_COMPAT_32 -g "engdemo.c"

-> gcc-4.1 -g -pthread -shared -Wl,--version-script,/home/hugo/Matlab/extern/lib/glnxa64/mexFunction.map -Wl,--no-undefined -o "engdemo.mexa64" engdemo.o -Wl,-rpath-link,/home/hugo/Matlab/bin/glnxa64 -L/home/hugo/Matlab/bin/glnxa64 -lmx -lmex -lmat -lm -lstdc++

engdemo.o: In function `main':
/home/hugo/Bureau/engdemo.c:35: undefined reference to `engOpen'
/home/hugo/Bureau/engdemo.c:55: undefined reference to `engPutVariable'
/home/hugo/Bureau/engdemo.c:61: undefined reference to `engEvalString'
/home/hugo/Bureau/engdemo.c:66: undefined reference to `engEvalString'
/home/hugo/Bureau/engdemo.c:67: undefined reference to `engEvalString'
/home/hugo/Bureau/engdemo.c:68: undefined reference to `engEvalString'
/home/hugo/Bureau/engdemo.c:69: undefined reference to `engEvalString'
engdemo.o:/home/hugo/Bureau/engdemo.c:82: more undefined references to `engEvalString' follow
engdemo.o: In function `main':
/home/hugo/Bureau/engdemo.c:101: undefined reference to `engOutputBuffer'
/home/hugo/Bureau/engdemo.c:118: undefined reference to `engEvalString'
/home/hugo/Bureau/engdemo.c:130: undefined reference to `engGetVariable'
/home/hugo/Bureau/engdemo.c:142: undefined reference to `engClose'
collect2: ld returned 1 exit status

mex: link of ' "engdemo.mexa64"' failed.

root(a)ubuntu:/home/hugo/Bureau# gcc -V 4.1 -B/home/hugo/Matlab/extern/include -I/home/hugo/Matlab/extern/include -o engdemo2 engdemo2.c -B/home/hugo/Matlab/bin/glnxa64 -leng -lmx -lut /usr/bin/ld: warning: libmat.so, needed by /home/hugo/Matlab/bin/glnxa64/libeng.so, not found (try using -rpath or -rpath-link)
/usr/bin/ld: warning: libmwfl.so, needed by /home/hugo/Matlab/bin/glnxa64/libmx.so, not found (try using -rpath or -rpath-link)
/home/hugo/Matlab/bin/glnxa64/libeng.so: undefined reference to `matCreateMATFile'
/home/hugo/Matlab/bin/glnxa64/libeng.so: undefined reference to `matGetNextVariable'
/home/hugo/Matlab/bin/glnxa64/libeng.so: undefined reference to `matClose'
/home/hugo/Matlab/bin/glnxa64/libmx.so: undefined reference to `fl::mem::manager::instance()'
/home/hugo/Matlab/bin/glnxa64/libmx.so: undefined reference to `fl::app::init::init()'
/home/hugo/Matlab/bin/glnxa64/libmx.so: undefined reference to `fl::app::init::~init()'
/home/hugo/Matlab/bin/glnxa64/libmx.so: undefined reference to `fl::mem::aligned_heap::instance'
/home/hugo/Matlab/bin/glnxa64/libmx.so: undefined reference to `fl::mem::create_managed_pool(unsigned long, unsigned long)'
/home/hugo/Matlab/bin/glnxa64/libeng.so: undefined reference to `matPutNextVariable'
collect2: ld returned 1 exit status

sincerely
Hugo
From: James Tursa on 24 Feb 2010 11:13
"Hugo Serrat" <removethis.hu.serrat(a)gmail.com.removethis> wrote in message <hm2uqh$q4e$1(a)fred.mathworks.com>...
> I searched on the net but there isn't any useful link. the same questions where asked on the central newsgroup but there isn't any answer. so i tried to do this maybe it will give an idea to somebody :
>
> root(a)ubuntu:/home/hugo/Bureau# mex -v -g engdemo.c

That is not the way to compile an engine application. For an engine application you need to use a specific options file with the mex command. e.g., for WinXP it would be something like this for the supplied lcc compiler:

options = [matlabroot '\bin\win32\mexopts\lccengmatopts.bat']
mex('-f',options,'engdemo.c')

Then to run it you can use the bang operator:

!engdemo

I would expect something similar for your system. You need to find and use the appropriate ___engmatopts.bat (or similar) file for your selected compiler.

James Tursa
From: Hugo Serrat on 25 Feb 2010 08:19
"James Tursa" <aclassyguy_with_a_k_not_a_c(a)hotmail.com> wrote in message <hm3j6e$9du$1(a)fred.mathworks.com>...
> "Hugo Serrat" <removethis.hu.serrat(a)gmail.com.removethis> wrote in message <hm2uqh$q4e$1(a)fred.mathworks.com>...
> > I searched on the net but there isn't any useful link. the same questions where asked on the central newsgroup but there isn't any answer. so i tried to do this maybe it will give an idea to somebody :
> >
> > root(a)ubuntu:/home/hugo/Bureau# mex -v -g engdemo.c
>
> That is not the way to compile an engine application. For an engine application you need to use a specific options file with the mex command. e.g., for WinXP it would be something like this for the supplied lcc compiler:
>
> options = [matlabroot '\bin\win32\mexopts\lccengmatopts.bat']
> mex('-f',options,'engdemo.c')
>
> Then to run it you can use the bang operator:
>
> !engdemo
>
> I would expect something similar for your system. You need to find and use the appropriate ___engmatopts.bat (or similar) file for your selected compiler.
>
> James Tursa

Thank you it worked perfectly. but what a stupid mistake ! I had an error : Can't start matlab Engine. Just forgot to install csh. After that everything worked perfectly.

Hugo Serrat
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