pip install fails on llvmlite while installing Librosa in MacOS BigSur

llvmlite is showing error while installing librosa. I am using MacOS BigSur and the latest version of pip. The exact error is pasted below -

Running setup.py install for llvmlite ... error
    ERROR: Command errored out with exit status 1:
     command: /Library/Frameworks/Python.framework/Versions/3.9/bin/python3.9 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/tq/7h23qgpn7pvcgr4thxpwxjph0000gn/T/pip-install-jz4vwh7l/llvmlite_7b78f3eaa3f44d6bb0fcc7816cc1635b/setup.py'"'"'; __file__='"'"'/private/var/folders/tq/7h23qgpn7pvcgr4thxpwxjph0000gn/T/pip-install-jz4vwh7l/llvmlite_7b78f3eaa3f44d6bb0fcc7816cc1635b/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/tq/7h23qgpn7pvcgr4thxpwxjph0000gn/T/pip-record-qqe38zm7/install-record.txt --single-version-externally-managed --compile --install-headers /Library/Frameworks/Python.framework/Versions/3.9/include/python3.9/llvmlite
         cwd: /private/var/folders/tq/7h23qgpn7pvcgr4thxpwxjph0000gn/T/pip-install-jz4vwh7l/llvmlite_7b78f3eaa3f44d6bb0fcc7816cc1635b/
    Complete output (29 lines):
    running install
    running build
    got version from file /private/var/folders/tq/7h23qgpn7pvcgr4thxpwxjph0000gn/T/pip-install-jz4vwh7l/llvmlite_7b78f3eaa3f44d6bb0fcc7816cc1635b/llvmlite/_version.py {'version': '0.34.0', 'full': 'c5889c9e98c6b19d5d85ebdd982d64a03931f8e2'}
    running build_ext
    /Library/Frameworks/Python.framework/Versions/3.9/bin/python3.9 /private/var/folders/tq/7h23qgpn7pvcgr4thxpwxjph0000gn/T/pip-install-jz4vwh7l/llvmlite_7b78f3eaa3f44d6bb0fcc7816cc1635b/ffi/build.py
    LLVM version... Traceback (most recent call last):
      File "/private/var/folders/tq/7h23qgpn7pvcgr4thxpwxjph0000gn/T/pip-install-jz4vwh7l/llvmlite_7b78f3eaa3f44d6bb0fcc7816cc1635b/ffi/build.py", line 105, in main_posix
        out = subprocess.check_output([llvm_config, '--version'])
      File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 420, in check_output
        return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
      File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 501, in run
        with Popen(*popenargs, **kwargs) as process:
      File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 947, in __init__
        self._execute_child(args, executable, preexec_fn, close_fds,
      File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/subprocess.py", line 1819, in _execute_child
        raise child_exception_type(errno_num, err_msg, err_filename)
    FileNotFoundError: [Errno 2] No such file or directory: 'llvm-config'
    
    During handling of the above exception, another exception occurred:
    
    Traceback (most recent call last):
      File "/private/var/folders/tq/7h23qgpn7pvcgr4thxpwxjph0000gn/T/pip-install-jz4vwh7l/llvmlite_7b78f3eaa3f44d6bb0fcc7816cc1635b/ffi/build.py", line 191, in <module>
        main()
      File "/private/var/folders/tq/7h23qgpn7pvcgr4thxpwxjph0000gn/T/pip-install-jz4vwh7l/llvmlite_7b78f3eaa3f44d6bb0fcc7816cc1635b/ffi/build.py", line 185, in main
        main_posix('osx', '.dylib')
      File "/private/var/folders/tq/7h23qgpn7pvcgr4thxpwxjph0000gn/T/pip-install-jz4vwh7l/llvmlite_7b78f3eaa3f44d6bb0fcc7816cc1635b/ffi/build.py", line 107, in main_posix
        raise RuntimeError("%s failed executing, please point LLVM_CONFIG "
    RuntimeError: llvm-config failed executing, please point LLVM_CONFIG to the path for llvm-config
    error: command '/Library/Frameworks/Python.framework/Versions/3.9/bin/python3.9' failed with exit code 1
    ----------------------------------------
ERROR: Command errored out with exit status 1: /Library/Frameworks/Python.framework/Versions/3.9/bin/python3.9 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/tq/7h23qgpn7pvcgr4thxpwxjph0000gn/T/pip-install-jz4vwh7l/llvmlite_7b78f3eaa3f44d6bb0fcc7816cc1635b/setup.py'"'"'; __file__='"'"'/private/var/folders/tq/7h23qgpn7pvcgr4thxpwxjph0000gn/T/pip-install-jz4vwh7l/llvmlite_7b78f3eaa3f44d6bb0fcc7816cc1635b/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/tq/7h23qgpn7pvcgr4thxpwxjph0000gn/T/pip-record-qqe38zm7/install-record.txt --single-version-externally-managed --compile --install-headers /Library/Frameworks/Python.framework/Versions/3.9/include/python3.9/llvmlite Check the logs for full command output.

To Reproduce

pip install librosa

Expected behavior Expected librosa to install but it is showing error while installing llvmlite

Software versions*

macOS-10.16-x86_64-i386-64bit
Python 3.9.0 (v3.9.0:9cf6752276, Oct  5 2020, 11:29:23) 
[Clang 6.0 (clang-600.0.57)]
NumPy 1.19.4
SciPy 1.5.4

[musicnerd]

I’m sorry developers, but I don’t think it’s acceptable to build your software with multiple dependencies, but then when those dependencies can’t install (and therefore people can’t use/access your software without significant headache) you simply wipe your hands and say “not our problem”?? Either remove the dependencies or work with those teams to fix the issue. Having to compile a dependency package from source is unacceptable for beginners. For the record, I had no problem installing on MacOS (Mojave), but can’t install on Windows10 due to same issue as OP.

[stuartarchibald]

For the future, librosa depends on numba which depends on llvmlite (which encapsulates the LLVM compiler).

From a Numba point of view, Python 3.9 support turned out to be somewhat challenging, some of the details are here: https://github.com/numba/numba/issues/6345#issuecomment-738696458, it took a while to figure everything out. Good news is that some development packages should ship soon (PR https://github.com/numba/numba/pull/6579 has just been approved, llvmlite PR was approved a while back https://github.com/numba/llvmlite/pull/671). Thanks for your understanding and patience.