error on installing mac M1 computer

[abybordi]

I have problem pip installing qdldl on a mac M1 computer and the error doesn't seem to be an error of pip itself. here is what I get:

The C compiler
"/usr/bin/cc"

          is not able to compile a simple test program.
  
          It fails with the following output:
  
            Change Dir: /private/var/folders/3f/r0wbc5md3fd4qrrzdynqrtzm0000gn/T/pip-install-amewv_ax/qdldl_63c594913c0d4f96b904a16463ca161e/c/build/CMakeFiles/CMakeTmp
  
            Run Build Command(s):/usr/bin/make -f Makefile cmTC_49737/fast && xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
  
  
  
  
  
          CMake will not be able to correctly generate this project.
        Call Stack (most recent call first):
          CMakeLists.txt:4 (project)
  
  
        -- Configuring incomplete, errors occurred!
        See also "/private/var/folders/3f/r0wbc5md3fd4qrrzdynqrtzm0000gn/T/pip-install-amewv_ax/qdldl_63c594913c0d4f96b904a16463ca161e/c/build/CMakeFiles/CMakeOutput.log".
        See also "/private/var/folders/3f/r0wbc5md3fd4qrrzdynqrtzm0000gn/T/pip-install-amewv_ax/qdldl_63c594913c0d4f96b904a16463ca161e/c/build/CMakeFiles/CMakeError.log".
        xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
        building 'qdldl' extension
        creating build
        creating build/temp.macosx-11.1-arm64-cpython-38
        creating build/temp.macosx-11.1-arm64-cpython-38/cpp
     note: This error originates from a subprocess, and is likely not a problem with pip.
    ERROR: Failed building wheel for qdldl
    Running setup.py clean for qdldl
  Failed to build qdldl
  Installing collected packages: wheel, typing-extensions, tomli, setuptools, pyparsing, numpy, scipy, packaging, oldest-supported-numpy, setuptools_scm, qdldl
    Running setup.py install for qdldl: started
    Running setup.py install for qdldl: finished with status 'error'
    error: subprocess-exited-with-error
  
    × Running setup.py install for qdldl did not run successfully.
    │ exit code: 1
    ╰─> [44 lines of output]
        running install

miniforge3/envs/ninen/lib/python3.8/site-packages/setuptools/command/install.py:34: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.
warnings.warn(
running build
running build_ext
-- The C compiler identification is unknown
-- The CXX compiler identification is unknown
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - failed
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc - broken
The C compiler

            "/usr/bin/cc"
  
          is not able to compile a simple test program.
  
          It fails with the following output:
  
            Change Dir: /private/var/folders/3f/r0wbc5md3fd4qrrzdynqrtzm0000gn/T/pip-install-amewv_ax/qdldl_63c594913c0d4f96b904a16463ca161e/c/build/CMakeFiles/CMakeTmp
  
            Run Build Command(s):/usr/bin/make -f Makefile cmTC_a7ccf/fast && xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
  
  
  
          CMake will not be able to correctly generate this project.
        Call Stack (most recent call first):
          CMakeLists.txt:4 (project)
  
  
        -- Configuring incomplete, errors occurred!
        See also "/private/var/folders/3f/r0wbc5md3fd4qrrzdynqrtzm0000gn/T/pip-install-amewv_ax/qdldl_63c594913c0d4f96b904a16463ca161e/c/build/CMakeFiles/CMakeOutput.log".
        See also "/private/var/folders/3f/r0wbc5md3fd4qrrzdynqrtzm0000gn/T/pip-install-amewv_ax/qdldl_63c594913c0d4f96b904a16463ca161e/c/build/CMakeFiles/CMakeError.log".
        xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
        building 'qdldl' extension
        creating build
        creating build/temp.macosx-11.1-arm64-cpython-38
     xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
        error: command '/usr/bin/gcc' failed with exit code 1
        [end of output]
  
    note: This error originates from a subprocess, and is likely not a problem with pip.
  error: legacy-install-failure
  
  × Encountered error while trying to install package.
  ╰─> qdldl
  
  note: This is an issue with the package mentioned above, not pip.
  hint: See above for output from the failure.
  [end of output]

note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× pip subprocess to install build dependencies did not run successfully.
│ exit code: 1
See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

[tpilewicz]

Have you correctly installed the Command line tools?

xcode-select --install

[h-vetinari]

You can install for osx-arm (=M1) using conda

conda install -c conda-forge qdldl-python