Hi Olivier,
I was trying to install PY8 in MG5_2.5.1. I am getting the following error message.
make[1]: Entering directory `/tmp/tmpeyD9ys/HepMC-2.06.09/src'
/bin/sh ../libtool --tag=CXX --mode=link g++ -ansi -pedantic -Wall -g -O2 -o libHepMC.la -rpath /home/shibananda/RESEARCH/EVENT_GENERATOR/MG5_aMC_v2_5_1/HEPTools/hepmc/lib -version-info 4:0:0 CompareGenEvent.lo Flow.lo GenEvent.lo GenEventStreamIO.lo GenParticle.lo GenCrossSection.lo GenVertex.lo GenRanges.lo HeavyIon.lo IO_AsciiParticles.lo IO_GenEvent.lo PdfInfo.lo Polarization.lo SearchVector.lo StreamHelpers.lo StreamInfo.lo Units.lo WeightContainer.lo
g++ -shared -nostdlib /usr/lib/../lib64/crti.o /cm/local/apps/gcc/5.2.0/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/crtbeginS.o .libs/CompareGenEvent.o .libs/Flow.o .libs/GenEvent.o .libs/GenEventStreamIO.o .libs/GenParticle.o .libs/GenCrossSection.o .libs/GenVertex.o .libs/GenRanges.o .libs/HeavyIon.o .libs/IO_AsciiParticles.o .libs/IO_GenEvent.o .libs/PdfInfo.o .libs/Polarization.o .libs/SearchVector.o .libs/StreamHelpers.o .libs/StreamInfo.o .libs/Units.o .libs/WeightContainer.o -Wl,--rpath -Wl,/cm/local/apps/gcc/5.2.0/lib/../lib -Wl,--rpath -Wl,/cm/local/apps/gcc/5.2.0/lib/../lib -L/cm/shared/apps/slurm/15.08.6/lib64/../lib64 -L/cm/local/apps/cuda/libs/current/lib64/../lib64 -L/cm/shared/apps/cuda75/toolkit/7.5.18/lib64/../lib64 -L/cm/local/apps/gcc/5.2.0/lib/gcc/x86_64-unknown-linux-gnu/5.2.0 -L/cm/local/apps/gcc/5.2.0/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/../../../../lib64 -L/lib/../lib64 -L/usr/lib/../lib64 -L/cm/shared/apps/slurm/15.08.6/lib64/slurm -L/cm/shared/apps/slurm/15.08.6/lib64 -L/cm/local/apps/cuda/libs/current/lib64 -L/cm/shared/apps/cuda75/toolkit/7.5.18/lib64 -L/cm/local/apps/gcc/5.2.0/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/../../.. /cm/local/apps/gcc/5.2.0/lib/../lib/libstdc++.so -lm -lc -lgcc_s /cm/local/apps/gcc/5.2.0/lib/gcc/x86_64-unknown-linux-gnu/5.2.0/crtendS.o /usr/lib/../lib64/crtn.o -Wl,-soname -Wl,libHepMC.so.4 -o .libs/libHepMC.so.4.0.0
/cm/local/apps/gcc/5.2.0/lib/../lib/libstdc++.so: could not read symbols: File in wrong format
collect2: error: ld returned 1 exit status
make[1]: *** [libHepMC.la] Error 1
make[1]: Leaving directory `/tmp/tmpeyD9ys/HepMC-2.06.09/src'
make: *** [install-recursive] Error 1
Finished HEPMC installation
> Now aborting installation of tool 'pythia8'.
Command "install pythia8 " interrupted in sub-command:
"install pythia8" with error:
InvalidCmd : Installation of pythia8 failed.
Regards,
Shiba