compile C code in matlab from linux

I am getting this error when i try to compile the engdemo.c

The command used is.

mex -f engopts.sh engdemo.c -v

/cad/local/apps/mathworks/matlab/2009a/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'
/cad/local/apps/mathworks/matlab/2009a/bin/glnxa64/libmwfl.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'
/cad/local/apps/mathworks/matlab/2009a/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'
/cad/local/apps/mathworks/matlab/2009a/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'
/cad/local/apps/mathworks/matlab/2009a/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'
/cad/local/apps/mathworks/matlab/2009a/bin/glnxa64/libmwfl.so: undefined reference to `std::bad_alloc::what() const@GLIBCXX_3.4.9'
/cad/local/apps/mathworks/matlab/2009a/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'
collect2: ld returned 1 exit status

Answer 1

[Kaustubha Govind]

What version of gcc are you using? You need gcc 4.2.3 for R2009a on Linux. Make sure that you select this compiler with "mex -setup". If you are indeed using gcc 4.2.3, you may need to update your libstdc++ libraries to match your gcc version. For gcc 4.2.3, libstdc++.so.6.0.9 or higher is required.

[Subin]

Thanks for the reply. But the matlab(R2009a) was showing the supported gcc version is from 4.1 to 4.2. I am using 4.1.2.

How to check libstdc++ library version?

[Kaustubha Govind]

Try "ls -l /usr/lib/libstdc++*" at the system shell.