Installation of iTensor in cluster

I am a new user of iTensor. Everything is perfectly running on my laptop and Desktop. However, when I am trying to install it in the cluster (for Linux), it is showing an error message

g++: error: unrecognized command line option ‘-std=c++17’
g++: error: unrecognized command line option ‘-fconcepts’
Failure while executing command: g++ -m64 -std=c++17 -fconcepts -fPIC -c -I’/home/ssr/itensor’ -I/opt/intel/mkl/include -O2 -DNDEBUG -Wall -Wno-unknown-pragmas -DPLATFORM_lapack -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES=0 -o tensor/lapack_wrap.o tensor/

The gcc compiler installed there has following version:
g++ (GCC) 4.8.5 20150623 (Red Hat 4.8.5-36)
Copyright (C) 2015 Free Software Foundation, Inc.

Any help will be highly appreciated.

Hi, so it looks like that version of gcc doesn’t support C++17. Is there a newer version available on your cluster?

Dear Miles,
I asked the admin, and they suggested to use GNU toolchain version9.1; So I needed to invoke g+±9.1.0. This is now working fine :slight_smile:
Thanks a lot for your kind response!

Glad to hear that worked -