Mex compiling on 64 bit linux - /usr/bin/ld: cannot find -lstdc++

Question

Okay I am trying to compile a mex file on 64 bit linux, ubuntu to be precise with Matlab 2013a.

First it gave a error that it could not find GLIBCXX_3.4.15

Answer 1

Same problem here on Ubuntu 13.04 using MATLAB 2013a. I solved it doing:

sudo mv /usr/local/MATLAB/R2013a/sys/os/glnxa64/libstdc++.so.6 /usr/local/MATLAB/R2013a/sys/os/glnxa64/libstdc++.so.6.old

To keep a backup just in case.

And then a symbolic link:

sudo ln -s /usr/lib/x86_64-linux-gnu/libstdc++.so.6.0.17 /usr/local/MATLAB/R2013a/sys/os/glnxa64/libstdc++.so.6

Answer 2

Look at this line gcc -O -pthread -shared -Wl,--version-script,/usr/local/MATLAB/R2013a/extern/lib/glnxa64/mexFunction.map -Wl,--no-undefined -o "tload3.mexa64" tload3.o -Wl,-rpath-link,/usr/local/MATLAB/R2013a/bin/glnxa64 -L/usr/local/MATLAB/R2013a/bin/glnxa64 -lmx -lmex -lmat -lm -lstdc++.

The options with L are the places where gcc/the linker looks for libraries. Id sugest trying to put the symlink in /usr/local/MATLAB/R2013a/bin/glnxa64 ( libstdc++.so.6 is there in 2012a), and start matlab from a terminal, it spits some errors there. Or add the new folder as a CLIB argument.

And I also would delete the -ansi part for c ( replace it with -std=c99), so that it won't give you errors on using \ style comments in your c code.

Answer 3

I had the same problem and none of the posted solutions worked for me (i.e. deleting or adding new symlinks), and it turned out that I hadn't installed the appropriate compiler package!

For me, the solution was:

sudo yum install gcc-g++

I'm running MATLAB 2014b on 64-bit Linux (RHEL 6).

Answer 4

You created the link libstdc++.so.6 in /usr/local/MATLAB/R2013a/bin/glnxa64 to the library in your system, installed by apt-get install libstdc++6-4.4-dev .

Now try creating also a link named libstdc++.so to libstdc++.so.6 in /usr/local/MATLAB/R2013a/bin/glnxa64.

Answer 5

I had the same problem and this worked for me

Navigate to the following path cd /usr/local/MATLAB/R2013a/sys/os/glnxa64/, (your path might varies) then remove the libstdc library (or safer rename it)

sudo mv libstdc++.so.6 libstdc++.so.6.old

I have the same configuration, Ubuntu Linux 64 bit with Matlab 2013a