Installation issues

I'm trying to run this on MacOS and having trouble. I've been trying for a few weeks now and can't get a successful installation. I'd appreciate some advice as it seems the package is not in great shape at least for my architecture.

```
System:
OS: macOS 26.1
CPU: (12) arm64 Apple M3 Pro
Memory: 868.22 MB / 36.00 GB
Shell: 5.9 - /bin/zsh
Utilities:
Make: 3.81 - /usr/bin/make
GCC: 17.0.0 - /usr/bin/gcc
Git: 2.52.0 - /opt/homebrew/bin/git
Clang: 17.0.0 - /usr/bin/clang
FFmpeg: 8.0.1 - /opt/homebrew/bin/ffmpeg
Curl: 8.7.1 - /usr/bin/curl
OpenSSL: 3.6.0 - /opt/homebrew/bin/openssl
```

I've tried with UV as a tool.

```bash
uv tool install scancode-toolkit
Resolved 72 packages in 638ms
error: Failed to prepare distributions
Caused by: Failed to fetch wheel: intbitset==2.4.1
Caused by: Build backend failed to build wheel through `build_wheel()` with exit status: 1
--- stdout:
running bdist_wheel
running build
running build_py
copying intbitset/intbitset_helper.py -> build/lib.macosx-11.0-arm64-cpython-311
copying intbitset/intbitset_version.py -> build/lib.macosx-11.0-arm64-cpython-311
running egg_info
writing intbitset/intbitset.egg-info/PKG-INFO
writing dependency_links to intbitset/intbitset.egg-info/dependency_links.txt
writing requirements to intbitset/intbitset.egg-info/requires.txt
writing top-level names to intbitset/intbitset.egg-info/top_level.txt
reading manifest file 'intbitset/intbitset.egg-info/SOURCES.txt'
reading manifest template 'MANIFEST.in'
adding license file 'LICENSE'
adding license file 'README.rst'
adding license file 'CHANGES.rst'
adding license file 'RELEASE-NOTES.rst'
writing manifest file 'intbitset/intbitset.egg-info/SOURCES.txt'
running build_ext
building 'intbitset' extension
clang -DNDEBUG -g -fwrapv -O3 -Wall -arch arm64 -mmacosx-version-min=11.0 -Wno-nullability-completeness -Wno-expansion-to-defined -Wno-undef-prefix -fPIC -Werror=unguarded-availability-new -I/Users/steve/.cache/uv/builds-v0/.tmpLsRrYC/include -I/Users/steve/.local/share/uv/python/cpython-3.11.10-macos-aarch64-none/include/python3.11 -c intbitset/intbitset.c -o build/temp.macosx-11.0-arm64-cpython-311/intbitset/intbitset.o -O3 -march=core2 -mtune=native
--- stderr:
/Users/steve/.cache/uv/builds-v0/.tmpLsRrYC/lib/python3.11/site-packages/setuptools/_distutils/dist.py:289: UserWarning: Unknown distribution option: 'test_suite'
warnings.warn(msg)
/Users/steve/.cache/uv/builds-v0/.tmpLsRrYC/lib/python3.11/site-packages/setuptools/_distutils/dist.py:289: UserWarning: Unknown distribution option: 'tests_require'
warnings.warn(msg)
/Users/steve/.cache/uv/builds-v0/.tmpLsRrYC/lib/python3.11/site-packages/setuptools/dist.py:759: SetuptoolsDeprecationWarning: License classifiers are deprecated.
!!

********************************************************************************
Please consider removing the following classifiers in favor of a SPDX license expression:

License :: OSI Approved :: GNU Lesser General Public License v3 or later (LGPLv3+)

See https://packaging.python.org/en/latest/guides/writing-pyproject-toml/#license for details.
********************************************************************************

!!
self._finalize_license_expression()
/Users/steve/.cache/uv/builds-v0/.tmpLsRrYC/lib/python3.11/site-packages/setuptools/dist.py:483: SetuptoolsDeprecationWarning: Cannot find any files for the given pattern.
!!

********************************************************************************
Pattern 'AUTHOR.rst' did not match any files.

By 2026-Mar-20, you need to update your project and remove deprecated calls
or your builds will no longer be supported.
********************************************************************************

!!
for path in sorted(cls._find_pattern(pattern, enforce_match))
warning: no files found matching '*.css' under directory 'docs/_themes'
warning: no files found matching '*.css_t' under directory 'docs/_themes'
warning: no files found matching '*.conf' under directory 'docs/_themes'
warning: no files found matching '*.html' under directory 'docs/_themes'
warning: no files found matching 'COPYING' under directory 'docs/_themes'
warning: no files found matching 'README' under directory 'docs/_themes'
warning: no files found matching '*.html' under directory 'docs/_templates'
clang: error: unsupported argument 'core2' to option '-march='
error: command '/usr/bin/clang' failed with exit code 1
```

as a pip package

```bash
❯ uv venv --python 3.13
Using Python 3.13.11 interpreter at: /opt/homebrew/opt/python@3.13/bin/python3.13
Creating virtual environment at: .venv
Activate with: source .venv/bin/activate
❯ source .venv/bin/activate
❯ cd scancode-toolkit-v32.4.1
❯ ./scancode --help
/Users/steve/dev/cruft/scancode/scancode-toolkit-v32.4.1/scancode: line 139: /Users/steve/dev/cruft/scancode/scancode-toolkit-v32.4.1/venv/bin/scancode: No such file or directory
❯ ls
apache-2.0.LICENSE PYTHON_EXECUTABLE
AUTHORS.rst README.rst
cc-by-4.0.LICENSE ROADMAP-ABOUTCODE.rst
CHANGELOG.rst ROADMAP.rst
CODE_OF_CONDUCT.rst samples/
configure* scancode*
CONTRIBUTING.rst scancode_toolkit-32.4.1-cp313-none-any.whl
etc/ SCANCODE_VERSION
extractcode* scancode-toolkit.ABOUT
INSTALL.rst thirdparty/
NOTICE venv/
❯ uv pip install --upgrade pip setuptools wheel
Resolved 3 packages in 182ms
Prepared 3 packages in 140ms
Installed 3 packages in 11ms
+ pip==25.3
+ setuptools==80.9.0
+ wheel==0.45.1
❯ uv pip install scancode-toolkit
Resolved 72 packages in 2.35s
error: Failed to prepare distributions
Caused by: Failed to fetch wheel: pyicu==2.16
Caused by: Build backend failed to determine extra requires with `build_wheel()` with exit status: 1
--- stdout:
(running 'icu-config --version')
(running 'pkg-config --modversion icu-i18n')
--- stderr:
Package icu-i18n was not found in the pkg-config search path.
Perhaps you should add the directory containing `icu-i18n.pc'
to the PKG_CONFIG_PATH environment variable
Package 'icu-i18n' not found
Traceback (most recent call last):
File "", line 89, in
File "", line 717, in __getitem__
KeyError: 'ICU_VERSION'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "", line 92, in
File "", line 19, in check_output
File "/opt/homebrew/Cellar/python@3.13/3.13.11/Frameworks/Python.framework/Versions/3.13/lib/python3.13/subprocess.py", line 472, in check_output
return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
**kwargs).stdout
^^^^^^^^^
File "/opt/homebrew/Cellar/python@3.13/3.13.11/Frameworks/Python.framework/Versions/3.13/lib/python3.13/subprocess.py", line 554, in run
with Popen(*popenargs, **kwargs) as process:
~~~~~^^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/python@3.13/3.13.11/Frameworks/Python.framework/Versions/3.13/lib/python3.13/subprocess.py", line 1039, in __init__
self._execute_child(args, executable, preexec_fn, close_fds,
~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
pass_fds, cwd, env,
^^^^^^^^^^^^^^^^^^^
...<5 lines>...
gid, gids, uid, umask,
^^^^^^^^^^^^^^^^^^^^^^
start_new_session, process_group)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/homebrew/Cellar/python@3.13/3.13.11/Frameworks/Python.framework/Versions/3.13/lib/python3.13/subprocess.py", line 1991, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'icu-config'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "", line 96, in
File "", line 19, in check_output
File "/opt/homebrew/Cellar/python@3.13/3.13.11/Frameworks/Python.framework/Versions/3.13/lib/python3.13/subprocess.py", line 472, in check_output
return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
**kwargs).stdout
^^^^^^^^^
File "/opt/homebrew/Cellar/python@3.13/3.13.11/Frameworks/Python.framework/Versions/3.13/lib/python3.13/subprocess.py", line 577, in run
raise CalledProcessError(retcode, process.args,
output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '('pkg-config', '--modversion', 'icu-i18n')' returned non-zero exit status 1.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "", line 14, in
requires = get_requires_for_build({})
File "/Users/steve/.cache/uv/builds-v0/.tmpWZ9h2Z/lib/python3.13/site-packages/setuptools/build_meta.py", line 331, in get_requires_for_build_wheel
return self._get_build_requires(config_settings, requirements=[])
~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/steve/.cache/uv/builds-v0/.tmpWZ9h2Z/lib/python3.13/site-packages/setuptools/build_meta.py", line 301, in _get_build_requires
self.run_setup()
~~~~~~~~~~~~~~^^
File "/Users/steve/.cache/uv/builds-v0/.tmpWZ9h2Z/lib/python3.13/site-packages/setuptools/build_meta.py", line 317, in run_setup
exec(code, locals())
~~~~^^^^^^^^^^^^^^^^
File "", line 99, in
RuntimeError:
Please install pkg-config on your system or set the ICU_VERSION environment
variable to the version of ICU you have installed.

---
```