I tried to install RISCV toolchain in ubuntu 20.10. I got error
Configuring project riscv-isa-sim
Building project riscv-isa-sim
./fesvr/dtm.cc: In member function ‘uint32_t dtm_t::get_xlen()’:
…/fesvr/dtm.cc:488:16: error: ‘runtime_error’ is not a member of ‘std’
488 | throw std::runtime_error(“FESVR DTM Does not support 128-bit”);
| ^~~~~~~~~~~~~
…/fesvr/dtm.cc:505:14: error: ‘runtime_error’ is not a member of ‘std’
505 | throw std::runtime_error(“FESVR DTM can’t determine XLEN. Aborting”);
| ^~~~~~~~~~~~~
…/fesvr/dtm.cc:506:1: warning: control reaches end of non-void function [-Wreturn-type]
506 | }
| ^
Can you help me on this.