问题
I have been stuck on this problem for several weeks and been looking around on Internet for solution but so far not so good...
So I have a program written by someone else and I try to compile it in Matlab to make it work. My computer is Red-hat enterprise Linux workstation (64 bits) with gcc 4.4.3 and Matlab 2011b installed. The gcc is compatible with my Matlab (http://www.mathworks.com/support/compilers/R2011b/glnxa64.html).
The compilation works fine (I mean, no error message occurs in Matlab command window). But after compilation, every time when I use a specific function from the compilation (it's call "mexLasso"), it will show up errors like this:
***Invalid MEX-file '/usr/local/matlab_R2011b/toolbox/spams-matlab/build/mexLasso.mexa64': /usr/local/matlab_R2011b/bin/glnxa64/../../sys/os/glnxa64/libstdc++.so.6: version `GLIBCXX_3.4.11' not found (required by /usr/local/matlab_R2011b/toolbox/spams-matlab/build/mexLasso.mexa64)
Error in test (line 24) alpha=mexLasso(X,D,param);*
So I type "strings /usr/lib/libstdc++.so.6 | grep GLIBC" in the terminal, and I found the "GLIBCXX_3.4.11" is actually in it.
I've been using Linux and gcc stuff for only several months...so there are still a lot of things I don't understand. It will be of great help if you can explain it in detail. Thanks!!
%% More detail: I got these programs on machine learning from http://spams-devel.gforge.inria.fr/downloads.html. The wierd thing is, after compilation, other functions in that package works fine (such as "mexTrainDL").
回答1:
The solution prompted by @whjiang works but have two limits:
- You may be required a sudo privilege to change the library symbol link.
- The change is global and can affect all users
So there is another.
As explained by this answer from MATLAB Central, the problem is caused by Matlab:
Matlab internally changes the LD_LIBRARY_PATH to prefer
<MatlabPATH >/sys/os/<ARCH>
and the <MatlabPATH>/sys/os/libstdc++.so.6 is out of date.
The solution is set LD_PRELOAD when calling Matlab like this,
env LD_PRELOAD=/usr/lib/libstdc++.so.6 <MatlabPATH>/bin/matlab -desktop
The path of libstdc++.so.6 my be different from os to os. For example, on my LMDE2, the path is /usr/lib/x86_64-linux-gnu/libstdc++.so.6.
回答2:
This is answered in the libstdc++ FAQ: http://gcc.gnu.org/onlinedocs/libstdc++/faq.html#faq.how_to_set_paths
回答3:
Here is an solution:
sudo ln -sf /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.19 /usr/local/MATLAB/R2011b/bin/glnxa64/libstdc++.so.6
explanation and reference: http://fantasticzr.wordpress.com/2013/05/29/matlab-error-libstdc-so-version-glibcxx_3-4-15-not-found/
回答4:
A simple solution from this page ( http://ubuntuforums.org/showthread.php?t=808045 ) that worked for me. Go to the matlab directory where libstdc++.so.6 and libgcc_s.so.1 are stored. In my case, this was:
cd /usr/local/MATLAB/MATLAB_Production_Server/R2015a/sys/os/glnxa64
Then rename libstdc++.so.6 and libgcc_s.so.1:
sudo mv libstdc++.so.6 libstdc++.so.6.orig
sudo mv libgcc_s.so.1 libgcc_s.so.1.orig
That's it!
来源：https://stackoverflow.com/questions/22564357/usr-libstdc-so-6-version-glibcxx-3-4-11-not-found-required-by