[Getfem-users] matlab interface and the infamous "libgcc_s.so.1: version `GCC_3.4' not found"

[julien pommier]

There is a very common problem with the getfem interface on matlab. This 
occurs as soon as one uses a g++ version that is higher than the one 
used to build matlab.

For example, on a x86_64 host, using matlab R14 and a custom compiled 
g++-4.2, configured with:
../configure  CXX=g++-4.2 --enable-matlab --with-pic BLAS_LIBS=builtin

I get:

> matlab -nojvm
>> gf_asm
??? Invalid MEX-file 
'/home/jpommier/getfem/getfem++/gcc-4.2/interface/src/matlab/gf_matlab.mexa64': 
/usr/local/matlab14-SP3/bin/glnxa64/../../sys/os/glnxa64/libgcc_s.so.1: 
version `GCC_3.4' not found (required by 
/home/jpommier/getfem/getfem++/gcc-4.2/interface/src/matlab/gf_matlab.mexa64).

The fix to this problem is to remove the useless libgcc_s.so.1 of 
matlab. If you cannot because you have no administrator priviledges, you 
can use LD_PRELOAD to load a more recent libgcc_s before matlab:

LD_PRELOAD=/home/jpommier/local/gcc-4.2/lib64/libgcc_s.so matlab -nojvm

A similar problem may occur with libstdc++... For example, on a 32bits 
x86 host, I get:

>> gf_asm
??? Invalid MEX-file 
'/home-local/pommier/getfem/getfem++/gcc-4.1/interface/src/matlab/gf_matlab.mexglx': 
/opt/matlab-2006b/bin/glnx86/../../sys/os/glnx86/libstdc++.so.6: version 
`CXXABI_1.3.1' not found (required by 
/home-local/pommier/getfem/getfem++/gcc-4.1/interface/src/matlab/gf_matlab.mexglx).

Once again, using LD_PRELOAD fixes that problem:
LD_PRELOAD=/home-local/pommier/local/gcc-4.1/lib/libstdc++.so.6 matlab 
-nojvm

--
Julien Pommier