Installing numba and llvmlite Python on Windows 10 fail

Question

Installing numba and llvmlite Python on Windows 10 failure

I have tried to install Python numba on Windows 10 using

pip install numba

with partial success, but a failure installing llvmlite

Requirement already satisfied: numpy>=1.15 in c:\users\paul\appdata\local\programs\python\python39\lib\site-packages (from numba) (1.19.2+mkl)
Requirement already satisfied: setuptools in c:\users\paul\appdata\local\programs\python\python39\lib\site-packages (from numba) (49.2.1)
Building wheels for collected packages: numba, llvmlite
  Building wheel for numba (setup.py) ... done
  Created wheel for numba: filename=numba-0.51.2-cp39-cp39-win_amd64.whl size=2173229 sha256=249a12f2e1436ac244e2730f6e7ddb5bd53413460dcbdc4ed4e6aeebbf16d6ce
  Stored in directory: c:\users\paul\appdata\local\pip\cache\wheels\0a\51\41\9f5a61bcd9d25271d7021e05cbabcd574fb3d534d07654b780
  Building wheel for llvmlite (setup.py) ... error
  ERROR: Command errored out with exit status 1:
  
    CMake Error at CMakeLists.txt:9 (find_package):
      Could not find a package configuration file provided by "LLVM" with any of
      the following names:

        LLVMConfig.cmake
        llvm-config.cmake

      Add the installation prefix of "LLVM" to CMAKE_PREFIX_PATH or set
      "LLVM_DIR" to a directory containing one of the above files.  If "LLVM"
      provides a separate development package or SDK, be sure it has been installed.

    -- Configuring incomplete, errors occurred!

Doesn't know where LLVM is installed?

So I used Windows Environment editor to add LLVM_DIR with value C:\Program Files\mingw-w64\winlibs-x86_64-posix-seh-gcc-9.3.0-llvm-10.0.0-mingw-w64-7.0.0-r4\mingw64\lib\cmake\llvm

in the hope that it will use one of the four Clang versions that I have installed at C:\LLVM\clang-1100, C:\LLVM\clang-1000 ... latest binary is C:\LLVM\clang-1100\LLVM\bin

I also have VS 1017 and 1019 installed, and all compilers are working OK from other IDEs and builds.

and downloaded the most recent wheel

llvmlite-0.34.0-cp39-cp39-win_amd64.whl

and added LLVM_DIR to system PATH

C:\Program Files\mingw-w64\winlibs-x86_64-posix-seh-gcc-9.3.0-llvm-10.0.0-mingw-w64-7.0.0-r4\mingw64\lib\cmake\llvm

This allows it to more nearly work, but fails using MSVC

   Microsoft (R) Build Engine version 15.9.21+g9802d43bc3 for .NET Framework
    Copyright (C) Microsoft Corporation. All rights reserved.

    C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\Common7\IDE\VC\VCTargets\Microsoft.CppBuild.targets(399,5): warning MSB8029: The Intermediate directory or Output directory cannot reside under the Temporary directory as it could lead to issues with incremental build. [C:\Users\Paul\AppData\Local\Temp\pip-install-xvvf77_z\llvmlite\ffi\build\ZERO_CHECK.vcxproj]
    C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\Common7\IDE\VC\VCTargets\Microsoft.CppBuild.targets(399,5): warning MSB8029: The Intermediate directory or Output directory cannot reside under the Temporary directory as it could lead to issues with incremental build. [C:\Users\Paul\AppData\Local\Temp\pip-install-xvvf77_z\llvmlite\ffi\build\llvmlite.vcxproj]
    LINK : fatal error LNK1181: cannot open input file 'D:\winlibs64_stage\custombuilt\lib\libffi.dll.a' [C:\Users\Paul\AppData\Local\Temp\pip-install-xvvf77_z\llvmlite\ffi\build\llvmlite.vcxproj]
    Trying generator 'Visual Studio 15 2017 Win64'
    Traceback (most recent call last):
      File "C:\Users\Paul\AppData\Local\Temp\pip-install-xvvf77_z\llvmlite\ffi\build.py", line 191, in <module>
        main()
      File "C:\Users\Paul\AppData\Local\Temp\pip-install-xvvf77_z\llvmlite\ffi\build.py", line 179, in main
        main_win32()
      File "C:\Users\Paul\AppData\Local\Temp\pip-install-xvvf77_z\llvmlite\ffi\build.py", line 94, in main_win32
        subprocess.check_call(['cmake', '--build', build_dir, '--config', config])
      File "c:\users\paul\appdata\local\programs\python\python39\lib\subprocess.py", line 373, in check_call
        raise CalledProcessError(retcode, cmd)
    subprocess.CalledProcessError: Command '['cmake', '--build', 'C:\\Users\\Paul\\AppData\\Local\\Temp\\pip-install-xvvf77_z\\llvmlite\\ffi\\build', '--config', 'Release']' returned non-zero exit status 1.
    error: command 'c:\\users\\paul\\appdata\\local\\programs\\python\\python39\\python.exe' failed with exit code 1
    ----------------------------------------
ERROR: Command errored out with exit status 1: 'c:\users\paul\appdata\local\programs\python\python39\python.exe' -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:\\Users\\Paul\\AppData\\Local\\Temp\\pip-install-xvvf77_z\\llvmlite\\setup.py'"'"'; __file__='"'"'C:\\Users\\Paul\\AppData\\Local\\Temp\\pip-install-xvvf77_z\\llvmlite\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\Paul\AppData\Local\Temp\pip-record-l4absc_g\install-record.txt' --single-version-externally-managed --compile --install-headers 'c:\users\paul\appdata\local\programs\python\python39\Include\llvmlite' Check the logs for full command output.

This suggests that the output folder location is not specified, or that VS incremental build option is not set to 'not used'.

Or that I should use an LLVM version, but I don't know how to specify which one, and not use VS2017.

Suggestions how to get out of this rabbit hole most welcome ;-)

Thanks

Paul

Answer 1

I wanted to install librosa but I get stack with this error, but I managed to solve it with this:

• first I download the last version of llvmlite Here
• than I run the following command:

pip install llvmlite-0.35.0-cp39-cp39-win_amd64.whl

• next for all packages need by librosa I install them as follow:

pip install --no-deps packageName

• or just for more sample do as follow :

pip install librosa --ignore-installed llvmlite