Error during 'sim.py' execution

I am getting this error when I am trying to run ./sim.py:

make: Entering directory '/home/natan/linux-on-litex-vexriscv/build/sim/software/libcompiler_rt'
make: *** No rule to make target 'umodsi3.o', needed by 'libcompiler_rt.a'.  Stop.
make: Leaving directory '/home/natan/linux-on-litex-vexriscv/build/sim/software/libcompiler_rt'
Traceback (most recent call last):
  File "./sim.py", line 224, in <module>
    main()
  File "./sim.py", line 215, in main
    trace_end   = int(args.trace_end))
  File "/home/natan/linux-on-litex-vexriscv/litex/soc/integration/builder.py", line 169, in build
    self._generate_software(not self.soc.integrated_rom_initialized)
  File "/home/natan/linux-on-litex-vexriscv/litex/soc/integration/builder.py", line 152, in _generate_software
    subprocess.check_call(["make", "-C", dst_dir, "-f", makefile])
  File "/usr/lib/python3.5/subprocess.py", line 271, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['make', '-C', '/home/natan/linux-on-litex-vexriscv/build/sim/software/libcompiler_rt', '-f', '/home/natan/linux-on-litex-vexriscv/litex/soc/software/libcompiler_rt/Makefile']' returned non-zero exit status 2

I tried to run manually make -C /home/natan/linux-on-litex-vexriscv/build/sim/software/libcompiler_rt -f /home/natan/linux-on-litex-vexriscv/litex/soc/software/libcompiler_rt/Makefile and I got this error

make: Entering directory '/home/natan/linux-on-litex-vexriscv/build/sim/software/libcompiler_rt'
make: *** No rule to make target 'umodsi3.o', needed by 'libcompiler_rt.a'.  Stop.
make: Leaving directory '/home/natan/linux-on-litex-vexriscv/build/sim/software/libcompiler_rt'

I think that riscv-gcc is not compiling properly, but I am a benniger on this platform and I couldn’t solve.

Does someone can help me? I tried to run using Ubuntu 18.04, docker and also a gcloud instace Debian 9

[natanvotre]

@natanvotre: have you been able to check what caused the issue?

It seems that it was just matter of environment. With the docker, I could run either in pyhton3.6 or python3.7, That seemed to be the problem.

Anyway, thanks for helping me with this Issue and, either way, now we have a Dockerfile that can be used as reference!

[enjoy-digital]

it seems LiteX was not installed correctly and that compiler_rt submodule is missing. Can you tell us more how you installed LiteX? have you followed https://github.com/litex-hub/linux-on-litex-vexriscv#installing-litex to install LiteX? Can you check if compier_rt submodule has been correctly downloaded in litex/soc/software/compiler_rt?