Editing Installing the MATLAB interface to STIR (section)

== run-time errors in MATLAB ==
On Linux, you might see something like this
<pre>
Invalid MEX-file '/nobackup/umpw/STIR/STIR-Build/src/swig/stirMATLAB_wrap.mexa64':
/apps1/applications/matlab/R2016a/1/default/bin/glnxa64/../../sys/os/glnxa64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by /nobackup/umpw/STIR/STIR-Build/src/swig/stirMATLAB_wrap.mexa64)
</pre>
you might see something similar on Mac.

This problem  is caused by MathWorks making sure that MATLAB works by shipping its own version of system/gcc/dependent libraries, but breaking external code in the mean time. Our recommended solution is to compile EVERYTHING with a MATLAB compatible compiler. Check for instance https://uk.mathworks.com/support/sysreq/previous_releases.html.

On Linux/Mac you can do this as follows
<pre>
CC=gcc-4.7 CXX=g++4.7 ccmake ...
</pre>

If you want to use a more recent compiler (or have a corner case where you see the above error anyway), you 
could try to resolve by pre-loading your shared libraries. In bash, you can do for instance:
<pre>
LD_PRELOAD=/lib64/libstdc++.so.6:/lib64/libhdf5.so matlab&
</pre>
In certain systems, you might have to use <tt>LD_PRELOAD_64</tt>. Also, the exact path of your libraries will change. You can normally find out by locating the stirMATLAB_wrap.mex* file and doing something like
<pre>
ldd stirMATLAB_wrap.mexa64
</pre>