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Can't compile matcreat.cpp in linux

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Michael
Michael on 17 May 2011
Edited: John Kelly on 26 Feb 2015
I can't successfully compile the example file: matcreat.cpp (provided by mathworks.) I am running linux centOS 5.6 and am using g++ version 4.1.2. My matlab version is 2010a and I am on a 64-bit machine.
I can, however, successfully compile and run matcreat.c using gcc.
The command I use to compile is:
g++ -o ~/m matcreat.cpp -I /usr/local/matlab2010a/extern/include/ -L /usr/local/matlab2010a/bin/glnxa64/ -lmat -lmx
Here are the errors I get when using g++ to compile matcreat.cpp
/usr/local/matlab2010a/bin/glnxa64//libmx.so: undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::__ostream_insert<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*, long)@GLIBCXX_3.4.9'
/usr/local/matlab2010a/bin/glnxa64/libut.so: undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::basic_ostream<char, std::char_traits<char> >::_M_insert<void const*>(void const*)@GLIBCXX_3.4.9'
/usr/local/matlab2010a/bin/glnxa64/libmwfl.so: undefined reference to `std::bad_alloc::what() const@GLIBCXX_3.4.9'
/usr/local/matlab2010a/bin/glnxa64/libmwfl.so: undefined reference to `std::basic_istream<char, std::char_traits<char> >& std::basic_istream<char, std::char_traits<char> >::_M_extract<bool>(bool&)@GLIBCXX_3.4.9'
/usr/local/matlab2010a/bin/glnxa64//libmx.so: undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::basic_ostream<char, std::char_traits<char> >::_M_insert<double>(double)@GLIBCXX_3.4.9'
/usr/local/matlab2010a/bin/glnxa64/libut.so: undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::basic_ostream<char, std::char_traits<char> >::_M_insert<long>(long)@GLIBCXX_3.4.9'
/usr/local/matlab2010a/bin/glnxa64/libut.so: undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::basic_ostream<char, std::char_traits<char> >::_M_insert<bool>(bool)@GLIBCXX_3.4.9'
/usr/local/matlab2010a/bin/glnxa64//libmx.so: undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::basic_ostream<char, std::char_traits<char> >::_M_insert<unsigned long>(unsigned long)@GLIBCXX_3.4.9'
collect2: ld returned 1 exit status
I would like write c++ code to read and write .mat files. Thanks! -- Michael

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Accepted Answer

Kaustubha Govind
Kaustubha Govind on 17 May 2011
Edited: John Kelly on 26 Feb 2015
Have you tried compiling using the options file as described in the documentation: Building on UNIX Operating Systems. You are likely not linking against some additional C++ libraries.

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Michael
Michael on 17 May 2011
Kaustubha,
No. I have not tried that but it appears that the options file is needed for the "mex" command which is run within matlab.
I'm trying to compile a c++ program from the bash shell.
I think you are right that I'm not linking in all needed libraries, but I can't see what else to link in. As you can see from my description above, I am linking in /usr/local/matlab2010a/bin/glnxa64/ -lmat -lmx
Am I still missing something?
Thanks for your help,
Michael
Kaustubha Govind
Kaustubha Govind on 17 May 2011
Michael: If you follow the MEX command with the -v option, you will see the exact compiler/linker commands that are needed.
Michael
Michael on 20 May 2011
Dear Kaustubha,
Thank you for the answer.
I used the mex command as you suggested and saw the options. This lead me to see that I needed to use g++ version 4.3.4 instead of what I was using (version 4.1.2).
I changed compilers to g++ 4.3.4 and the mex function command worked and so does compiling from a bash shell with "g++".
Problem solved.
Thanks,
Michael

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