Mex on os X

I have Yosemite 10.10, Xcode 6.4, Matlab 2015b. I copy an example yprime.c from /Applications/MATLAB_R2015b.app/extern/examples/mex/ Then I compile with line /Applications/MATLAB_R2015b.app/bin/mex yprime.c and I get an error:

dyld: Symbol not found: __ZN6matrix6detail10noninlined12mx_array_api10mxMallocExEm
  Referenced from: /Applications/MATLAB_R2015b.app/bin/maci64/libmwm_dispatcher.dylib
  Expected in: /usr/lib/libSystem.B.dylib
 in /Applications/MATLAB_R2015b.app/bin/maci64/libmwm_dispatcher.dylib
/Applications/MATLAB_R2015b.app/bin/mex: line 365:  3709 Trace/BPT trap: 5       $MATLAB/bin/maci64/mex $args

Solution: In my .bash_profile I had this line "export DYLD_LIBRARY_PATH=/usr/local/lib". By removing it I got rid of the error when compiling.

[Walter Roberson]

Technical note: that symbol probably corresponds to

_matrix::detail::noninlined::mx_array_api::mxMallocEx(unsigned long)