Accelerator error: "cannot find -lstdc++" @linux

To reproduce the issue I have a blank SIMULINK model with the block "Transport Delay" with activated "Accelerator". When I try to simulate, I get this Error while compiling model : "cannot find -lstdc++"

• MATLAB r2017b
• Ubuntu 16.04.4.LTS
• gcc 4.9.4

Verbose MEX build:

### Generating code into build folder: /home/production/lacasa/lac_projects/slprj/accel/untitled
### Invoking Target Language Compiler on untitled.rtw
### Using System Target File: /opt/MATLAB/R2017b/rtw/c/accel/accel.tlc
### Loading TLC function libraries
....
### Initial pass through model to cache user defined code
.
### Caching model source code
........
### Writing header file untitled_acc_types.h
### Writing header file untitled_acc.h
### Writing header file rtwtypes.h
.
### Writing header file multiword_types.h
### Writing source file untitled_acc.c
### Writing header file untitled_acc_private.h
### Writing header file rt_defines.h
### TLC code generation complete.
.
### Processing Template Makefile: /opt/MATLAB/R2017b/rtw/c/accel/accel_unix.tmf
### untitled.mk which is generated from /opt/MATLAB/R2017b/rtw/c/accel/accel_unix.tmf is up to date
### Building untitled: /opt/MATLAB/R2017b/bin/glnxa64/gmake -f untitled.mk  ISPROTECTINGMODEL=NOTPROTECTING
/opt/MATLAB/R2017b/bin/glnxa64/mex -c   COPTIMFLAGS="-O0 -fPIC -DNDEBUG  -ansi -pedantic -Wno-long-long -fwrapv -fPIC"   -I. -I../../.. -I/opt/MATLAB/R2017b/simulink/include -I/opt/MATLAB/R2017b/extern/include -I/opt/MATLAB/R2017b/rtw/c/src -I/home/production/lacasa/lac_projects -I/home/production/lacasa/lac_projects/slprj/accel/untitled     "untitled_acc.c"
Building with 'gcc'.
MEX completed successfully.
### Linking ...
/opt/MATLAB/R2017b/bin/glnxa64/mex   COPTIMFLAGS="-O0 -fPIC -DNDEBUG  -ansi -pedantic -Wno-long-long -fwrapv -fPIC"    -MATLAB_ARCH=glnxa64 -silent -outdir ../../.. untitled_acc.o     -L/opt/MATLAB/R2017b/bin/glnxa64 -lut -L/opt/MATLAB/R2017b/bin/glnxa64 -lmwmathutil -L/opt/MATLAB/R2017b/bin/glnxa64 -lmwipp -ldl -lm -L/opt/MATLAB/R2017b/bin/glnxa64 -lmwsl_fileio -L/opt/MATLAB/R2017b/bin/glnxa64 -lmwsigstream -L/opt/MATLAB/R2017b/bin/glnxa64 -lmwsl_AsyncioQueue -L/opt/MATLAB/R2017b/bin/glnxa64 -lmwslexec_simbridge -L/opt/MATLAB/R2017b/bin/glnxa64 -lmwsimulink -L/opt/MATLAB/R2017b/bin/glnxa64 -lmwsl_simtarget_core -L/opt/MATLAB/R2017b/bin/glnxa64 -lmwsl_simtarget_instrumentation -L/opt/MATLAB/R2017b/bin/glnxa64 -lmwslio_core -L/opt/MATLAB/R2017b/bin/glnxa64 -lmwslio_clients -L/opt/MATLAB/R2017b/bin/glnxa64 -lmwsl_services
/usr/bin/ld: cannot find -lstdc++
collect2: error: ld returned 1 exit status

gmake: *** [../untitled_acc.mexa64] Error 255
### Build procedure for model: 'untitled' aborted due to an error.

gcc version:

> gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.9/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.9.4-2ubuntu1~14.04.1' --with-bugurl=file:///usr/share/doc/gcc-4.9/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.9 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.9 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.9-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.9-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.9-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.9.4 (Ubuntu 4.9.4-2ubuntu1~14.04.1)

Answer 1

[Timo Dörsam]

fixed, I had to delete and install these old gcc & g++ again.