Problem with mex files on Mountain Lion: explicit instantiation error

Hi, I'm working with MATLAB r2012b on Mountain Lion, and XCode version installed is 4.6.1. I've also used the patch at http://www.mathworks.it/support/solutions/en/data/1-IXBVKD/ and then I have typed "mex - setup" and selected the only option available

1: /Applications/MATLAB_R2012b.app/bin/mexopts.sh : Template Options file for building gcc MEX-files

I'm trying to use a framework for sparse modeling (written in C++) which uses mex files. In order to install the previous framework I have to call a matlab file inside the framework which calls mex function: however when I call this function I get the following message...

 ./linalg/linalg.h: At global scope:
./linalg/linalg.h: In instantiation of 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>]':
./linalg/linalg.h:1083:   instantiated from 'void Matrix<T>::print(const std::string&) const [with T = float]'
dictLearn/mex/mexTrainDL.cpp:197:   instantiated from here
./linalg/linalg.h:1083: error: explicit instantiation of 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::basic_string<_CharT, _Traits, _Alloc>&) [with _CharT = char, _Traits = std::char_traits<char>, _Alloc = std::allocator<char>]' but no definition available

    mex: compile of ' "dictLearn/mex/mexTrainDL.cpp"' failed.

The problem is the part with "error: explicit instantiation ... " Googling I have seen that I'm not the only one with this problem, but I don't know how to fix it. Thank you in advance for any help.

Mattia

Answer 1

[Di Yang]

I solved a similar problem by changing the "MACOSX_DEVELOPMENT_TARGET = 10.5" to "10.6" in mexopts.sh