numba: RPi3: cannot install Numba due to issue with LLVM toolchain

Reporting a bug

system information:

• Raspberry pi 3 Model B
• os is Rapsbian 10 (buster)
• Python 3.7.3
• attempting to install Librosa through pip 20.0.1
• gcc version 8.3.0

Hello,

I’ve been trying to install Librosa on my raspberry pi 3 model B. the line I used in order to install Librosa was: pip3 install --upgrade --user librosa after a really long download the installation got into infinite backtracking of the pip resolver trying to solve version conflicts over numba so I decided to run the line: pip3 install --upgrade --user -no--deps librosa instead and it did work and librosa was installed successfully according to pip.

right now when I attempt to import Librosa in the python shell I get the following Traceback:

`pi@raspberrypi:~ $ python3 Python 3.7.3 (default, Jul 25 2020, 13:03:44) [GCC 8.3.0] on linux Type “help”, “copyright”, “credits” or “license” for more information.

import librosa Traceback (most recent call last): File “<stdin>”, line 1, in <module> File “/home/pi/.local/lib/python3.7/site-packages/librosa/init.py”, line 211, in <module> from . import core File “/home/pi/.local/lib/python3.7/site-packages/librosa/core/init.py”, line 5, in <module> from .convert import * # pylint: disable=wildcard-import File “/home/pi/.local/lib/python3.7/site-packages/librosa/core/convert.py”, line 7, in <module> from . import notation File “/home/pi/.local/lib/python3.7/site-packages/librosa/core/notation.py”, line 8, in <module> from …util.exceptions import ParameterError File “/home/pi/.local/lib/python3.7/site-packages/librosa/util/init.py”, line 83, in <module> from .utils import * # pylint: disable=wildcard-import File “/home/pi/.local/lib/python3.7/site-packages/librosa/util/utils.py”, line 10, in <module> import numba File “/home/pi/.local/lib/python3.7/site-packages/numba/init.py”, line 4, in <module> from numba import module_type_inference File “/home/pi/.local/lib/python3.7/site-packages/numba/module_type_inference.py”, line 8, in <module> from numba import typesystem, symtab File “/home/pi/.local/lib/python3.7/site-packages/numba/typesystem/init.py”, line 6, in <module> from .typemapper import * File “/home/pi/.local/lib/python3.7/site-packages/numba/typesystem/typemapper.py”, line 3, in <module> import llvm.core ModuleNotFoundError: No module named ‘llvm’ `

I’ve tried to run sudo apt-get install llvm and it did install llvm but didn’t solve the issue. also tried running pip3 instal llvmlite but got the following result:

sudo pip3 install llvmlite Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple Collecting llvmlite Could not find a version that satisfies the requirement llvmlite (from versions: ) No matching distribution found for llvmlite

another attempt at installing librosa with pip resulted in this error:

ERROR: Command errored out with exit status 1:
   command: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/setup.py'"'"'; __file__='"'"'/tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /tmp/pip-wheel-s9gczj9k
       cwd: /tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/
  Complete output (15 lines):
  running bdist_wheel
  /usr/bin/python3 /tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/ffi/build.py
  LLVM version... 7.0.1
  
  Traceback (most recent call last):
    File "/tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/ffi/build.py", line 191, in <module>
      main()
    File "/tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/ffi/build.py", line 181, in main
      main_posix('linux', '.so')
    File "/tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/ffi/build.py", line 143, in main_posix
      raise RuntimeError(msg)
  RuntimeError: Building llvmlite requires LLVM 10.0.x or 9.0.x, got '7.0.1'. Be sure to set LLVM_CONFIG to the right executable path.
  Read the documentation at http://llvmlite.pydata.org/ for more information about building llvmlite.
  
  error: command '/usr/bin/python3' failed with exit status 1
  ----------------------------------------
  ERROR: Failed building wheel for llvmlite
  Running setup.py clean for llvmlite
Failed to build llvmlite
Installing collected packages: pycparser, llvmlite, numba, cffi, soundfile, resampy, audioread
    Running setup.py install for llvmlite ... error
    ERROR: Command errored out with exit status 1:
     command: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/setup.py'"'"'; __file__='"'"'/tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-c8uz7phd/install-record.txt --single-version-externally-managed --user --prefix= --compile --install-headers /home/pi/.local/include/python3.7m/llvmlite
         cwd: /tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/
    Complete output (18 lines):
    running install
    running build
    got version from file /tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/llvmlite/_version.py {'version': '0.35.0', 'full': 'ea23b026930cc00824c907172383f54c9d438e6b'}
    running build_ext
    /usr/bin/python3 /tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/ffi/build.py
    LLVM version... 7.0.1
    
    Traceback (most recent call last):
      File "/tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/ffi/build.py", line 191, in <module>
        main()
      File "/tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/ffi/build.py", line 181, in main
        main_posix('linux', '.so')
      File "/tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/ffi/build.py", line 143, in main_posix
        raise RuntimeError(msg)
    RuntimeError: Building llvmlite requires LLVM 10.0.x or 9.0.x, got '7.0.1'. Be sure to set LLVM_CONFIG to the right executable path.
    Read the documentation at http://llvmlite.pydata.org/ for more information about building llvmlite.
    
    error: command '/usr/bin/python3' failed with exit status 1
    ----------------------------------------
ERROR: Command errored out with exit status 1: /usr/bin/python3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/setup.py'"'"'; __file__='"'"'/tmp/pip-install-0gw3_ve1/llvmlite_1d4974bee4c74364ac4e473f80edfd7d/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /tmp/pip-record-c8uz7phd/install-record.txt --single-version-externally-managed --user --prefix= --compile --install-headers /home/pi/.local/include/python3.7m/llvmlite Check the logs for full command output.