Issue with Make Compile in setup

[Pavitra07]

On running make compile, i get the following errors. Kindly help.

[Dolu1990]

Hi,

which version of GCC do you have ?

(me gcc 10.1.0)

[Pavitra07]

Hello,

I have the following version:

gcc version 9.4.0 (Ubuntu 9.4.0-1ubuntu1~20.04.1)

[Dolu1990]

Ahh it may bit it, string_view seems to be from C++17, gcc 9.4 may be too old ?

[Pavitra07]

I have upgraded it to the following:
gcc version 10.3.0 (Ubuntu 10.3.0-1ubuntu1~20.04)
Still showing the same error for make compile.
Should I redo the process?

[Dolu1990]

hmm pretty sure it is related to different version of GCC / C++ library.
Issue is that string_view seems c++ 17, but verilator is only c++ 14, so kind of a missmatch XD

Looking at verilator/verilator#3081, seems like it may not be compatible with C++20
May worth a try ?

Getting a Very recent verilator version, and updating

NaxRiscv/src/test/cpp/naxriscv/makefile

Line 81 in 6d1d483

verilator -cc ${NAXRISCV_VERILOG} -CFLAGS -std=c++14 -LDFLAGS -pthread ${ADDCFLAGS} ${FLAGS} --gdbbt ${VERILATOR_ARGS} -Wno-UNOPTFLAT -Wno-WIDTH --x-assign unique --exe ${SRCS}

with -std=c++20 instead of -std=c++14 ?

[Pavitra07]

I did the update in the make file regarding c++20, but still facing the same errors. Is there any way I could get through this?

[Dolu1990]

Found it :)

So, there was a elfio update which broke things. (i had a old version of my PC)

You just need to reinstall elfio by :

sudo rm -rf /usr/include/elfio
git clone https://github.com/serge1/ELFIO.git
cd ELFIO
git checkout d251da09a07dff40af0b63b8f6c8ae71d2d1938d # Avoid C++17
sudo cp -R elfio /usr/include

[Pavitra07]

Thanks a lot for the help! This absolutely worked :)