Free-threaded Python Library Compatibility Checker

func, __pyx_vectorcallfunc vc, PyObject *const *args, size_t nargs, PyObject *kw);
                  |                                                                                ^~~~~~~~~~~~~~~~~~~~
                  |                                                                                vectorcallfunc
            numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11219:69: error: unknown type name ‘__pyx_vectorcallfunc’; did you mean ‘vectorcallfunc’?
            11219 | static PyObject *__Pyx_PyVectorcall_FastCallDict_kw(PyObject *func, __pyx_vectorcallfunc vc, PyObject *const *args, size_t nargs, PyObject *kw)
                  |                                                                     ^~~~~~~~~~~~~~~~~~~~
                  |                                                                     vectorcallfunc
            numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11264:80: error: unknown type name ‘__pyx_vectorcallfunc’; did you mean ‘vectorcallfunc’?
            11264 | static CYTHON_INLINE PyObject *__Pyx_PyVectorcall_FastCallDict(PyObject *func, __pyx_vectorcallfunc vc, PyObject *const *args, size_t nargs, PyObject *kw)
                  |                                                                                ^~~~~~~~~~~~~~~~~~~~
                  |                                                                                vectorcallfunc
            numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c: In function ‘__Pyx_CyFunction_CallAsMethod’:
            numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11953:6: error: unknown type name ‘__pyx_vectorcallfunc’; did you mean ‘vectorcallfunc’?
            11953 |      __pyx_vectorcallfunc vc = __Pyx_CyFunction_func_vectorcall(cyfunc);
                  |      ^~~~~~~~~~~~~~~~~~~~
                  |      vectorcallfunc
            numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:2448:45: warning: initialization of ‘int’ from ‘vectorcallfunc’ {aka ‘struct _object * (*)(struct _object *, struct _object * const*, long unsigned int,  struct _object *)’} makes integer from pointer without a cast [-Wint-conversion]
             2448 | #define __Pyx_CyFunction_func_vectorcall(f) (((PyCFunctionObject*)f)->vectorcall)
                  |                                             ^
            numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11953:32: note: in expansion of macro ‘__Pyx_CyFunction_func_vectorcall’
            11953 |      __pyx_vectorcallfunc vc = __Pyx_CyFunction_func_vectorcall(cyfunc);
                  |                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11956:16: warning: implicit declaration of function ‘__Pyx_PyVectorcall_FastCallDict’; did you mean ‘__Pyx_PyObject_FastCallDict’? [-Wimplicit-function-declaration]
            11956 |         return __Pyx_PyVectorcall_FastCallDict(func, vc, &PyTuple_GET_ITEM(args, 0), (size_t)PyTuple_GET_SIZE(args), kw);
                  |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                  |                __Pyx_PyObject_FastCallDict
            numpy/random/_mt19937.cpython-314t-x86_64-linux-gnu.so.p/numpy/random/_mt19937.pyx.c:11956:16: warning: returning ‘int’ from a function with return type ‘PyObject *’ {aka ‘struct _object *’} makes pointer from integer without a cast [-Wint-conversion]
            11956 |         return __Pyx_PyVectorcall_FastCallDict(func, vc, &PyTuple_GET_ITEM(args, 0), (size_t)PyTuple_GET_SIZE(args), kw);
                  |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            [501/530] Compiling C object numpy/random/_bounded_integers.cpython-314t-x86_64-linux-gnu.so.p/meson-generated_numpy_random__bounded_integers.pyx.c.o
            [502/530] Compiling C object numpy/random/_common.cpython-314t-x86_64-linux-gnu.so.p/meson-generated_numpy_random__common.pyx.c.o
            ninja: build stopped: subcommand failed.
            [end of output]
      
        note: This error originates from a subprocess, and is likely not a problem with pip.
      error: metadata-generation-failed
      
      × Encountered error while generating package metadata.
      ╰─> See above for output.
      
      note: This is an issue with the package mentioned above, not pip.
      hint: See above for details.
      [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.

ck (most recent call last):
        File "/tmp/pip-build-env-4rpul5v0/overlay/lib/python3.14t/site-packages/setuptools/_distutils/compilers/C/unix.py", line 217, in _compile
          self.spawn(
          ~~~~~~~~~~^
              compiler_so_cxx + cc_args + [src, '-o', obj] + extra_postargs
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          )
          ^
        File "/tmp/pip-install-egzfdy7t/grpcio_0b814cfed34345ea9eeed3a38d18d15b/src/python/grpcio/_spawn_patch.py", line 66, in _commandfile_spawn
          _classic_spawn(self, command, **kwargs)
          ~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-4rpul5v0/overlay/lib/python3.14t/site-packages/setuptools/_distutils/compilers/C/base.py", line 1158, in spawn
          spawn(cmd, dry_run=self.dry_run, **kwargs)
          ~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-4rpul5v0/overlay/lib/python3.14t/site-packages/setuptools/_distutils/spawn.py", line 93, in spawn
          raise DistutilsExecError(
              f"command {_debug(cmd)!r} failed with exit code {err.returncode}"
          ) from err
      distutils.errors.DistutilsExecError: command '/usr/bin/c++' failed with exit code 1
      
      During handling of the above exception, another exception occurred:
      
      Traceback (most recent call last):
        File "/tmp/pip-install-egzfdy7t/grpcio_0b814cfed34345ea9eeed3a38d18d15b/src/python/grpcio/commands.py", line 282, in build_extensions
          build_ext.build_ext.build_extensions(self)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^
        File "/tmp/pip-build-env-4rpul5v0/overlay/lib/python3.14t/site-packages/setuptools/_distutils/command/build_ext.py", line 484, in build_extensions
          self._build_extensions_serial()
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
        File "/tmp/pip-build-env-4rpul5v0/overlay/lib/python3.14t/site-packages/setuptools/_distutils/command/build_ext.py", line 510, in _build_extensions_serial
          self.build_extension(ext)
          ~~~~~~~~~~~~~~~~~~~~^^^^^
        File "/tmp/pip-build-env-4rpul5v0/overlay/lib/python3.14t/site-packages/setuptools/command/build_ext.py", line 264, in build_extension
          _build_ext.build_extension(self, ext)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
        File "/tmp/pip-build-env-4rpul5v0/overlay/lib/python3.14t/site-packages/setuptools/_distutils/command/build_ext.py", line 565, in build_extension
          objects = self.compiler.compile(
              sources,
          ...<5 lines>...
              depends=ext.depends,
          )
        File "/tmp/pip-install-egzfdy7t/grpcio_0b814cfed34345ea9eeed3a38d18d15b/src/python/grpcio/_parallel_compile_patch.py", line 70, in _parallel_compile
          multiprocessing.pool.ThreadPool(BUILD_EXT_COMPILER_JOBS).map(
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
              _compile_single_file, objects
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          )
          ^
        File "/root/.local/share/uv/python/cpython-3.14.0a6+freethreaded-linux-x86_64-gnu/lib/python3.14t/multiprocessing/pool.py", line 367, in map
          return self._map_async(func, iterable, mapstar, chunksize).get()
                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
        File "/root/.local/share/uv/python/cpython-3.14.0a6+freethreaded-linux-x86_64-gnu/lib/python3.14t/multiprocessing/pool.py", line 774, in get
          raise self._value
        File "/root/.local/share/uv/python/cpython-3.14.0a6+freethreaded-linux-x86_64-gnu/lib/python3.14t/multiprocessing/pool.py", line 125, in worker
          result = (True, func(*args, **kwds))
                          ~~~~^^^^^^^^^^^^^^^
        File "/root/.local/share/uv/python/cpython-3.14.0a6+freethreaded-linux-x86_64-gnu/lib/python3.14t/multiprocessing/pool.py", line 48, in mapstar
          return list(map(*args))
        File "/tmp/pip-install-egzfdy7t/grpcio_0b814cfed34345ea9eeed3a38d18d15b/src/python/grpcio/_parallel_compile_patch.py", line 65, in _compile_single_file
          self._compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
          ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-install-egzfdy7t/grpcio_0b814cfed34345ea9eeed3a38d18d15b/src/python/grpcio/commands.py", line 264, in new_compile
          return old_compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
        File "/tmp/pip-build-env-4rpul5v0/overlay/lib/python3.14t/site-packages/setuptools/_distutils/compilers/C/unix.py", line 223, in _compile
          raise CompileError(msg)
      distutils.compilers.C.errors.CompileError: command '/usr/bin/c++' failed with exit code 1
      
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for grpcio
ERROR: Failed to build installable wheels for some pyproject.toml based projects (grpcio)

md.py", line 357, in run_command
          self.distribution.run_command(command)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
        File "/tmp/pip-build-env-4bbjth4a/overlay/lib/python3.14t/site-packages/setuptools/dist.py", line 1106, in run_command
          super().run_command(command)
          ~~~~~~~~~~~~~~~~~~~^^^^^^^^^
        File "/tmp/pip-build-env-4bbjth4a/overlay/lib/python3.14t/site-packages/setuptools/_distutils/dist.py", line 1021, in run_command
          cmd_obj.run()
          ~~~~~~~~~~~^^
        File "/tmp/pip-build-env-4bbjth4a/overlay/lib/python3.14t/site-packages/setuptools/_distutils/command/build.py", line 135, in run
          self.run_command(cmd_name)
          ~~~~~~~~~~~~~~~~^^^^^^^^^^
        File "/tmp/pip-build-env-4bbjth4a/overlay/lib/python3.14t/site-packages/setuptools/_distutils/cmd.py", line 357, in run_command
          self.distribution.run_command(command)
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
        File "/tmp/pip-build-env-4bbjth4a/overlay/lib/python3.14t/site-packages/setuptools/dist.py", line 1106, in run_command
          super().run_command(command)
          ~~~~~~~~~~~~~~~~~~~^^^^^^^^^
        File "/tmp/pip-build-env-4bbjth4a/overlay/lib/python3.14t/site-packages/setuptools/_distutils/dist.py", line 1021, in run_command
          cmd_obj.run()
          ~~~~~~~~~~~^^
        File "/tmp/pip-build-env-4bbjth4a/overlay/lib/python3.14t/site-packages/setuptools/command/build_ext.py", line 99, in run
          _build_ext.run(self)
          ~~~~~~~~~~~~~~^^^^^^
        File "/tmp/pip-build-env-4bbjth4a/overlay/lib/python3.14t/site-packages/setuptools/_distutils/command/build_ext.py", line 368, in run
          self.build_extensions()
          ~~~~~~~~~~~~~~~~~~~~~^^
        File "<string>", line 862, in build_extensions
      RequiredDependencyException: zlib
      
      During handling of the above exception, another exception occurred:
      
      Traceback (most recent call last):
        File "/tmp/tmppr0gu9ok/venv/lib/python3.14t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
          main()
          ~~~~^^
        File "/tmp/tmppr0gu9ok/venv/lib/python3.14t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 373, in main
          json_out["return_val"] = hook(**hook_input["kwargs"])
                                   ~~~~^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/tmppr0gu9ok/venv/lib/python3.14t/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 280, in build_wheel
          return _build_backend().build_wheel(
                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^
              wheel_directory, config_settings, metadata_directory
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          )
          ^
        File "/tmp/pip-install-f26imvlu/pillow_d9017647ffda46078aa13f49a6f1fd26/_custom_build/backend.py", line 26, in build_wheel
          return super().build_wheel(wheel_directory, config_settings, metadata_directory)
                 ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-4bbjth4a/overlay/lib/python3.14t/site-packages/setuptools/build_meta.py", line 435, in build_wheel
          return _build(['bdist_wheel', '--dist-info-dir', str(metadata_directory)])
        File "/tmp/pip-build-env-4bbjth4a/overlay/lib/python3.14t/site-packages/setuptools/build_meta.py", line 423, in _build
          return self._build_with_temp_dir(
                 ~~~~~~~~~~~~~~~~~~~~~~~~~^
              cmd,
              ^^^^
          ...<3 lines>...
              self._arbitrary_args(config_settings),
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
          )
          ^
        File "/tmp/pip-build-env-4bbjth4a/overlay/lib/python3.14t/site-packages/setuptools/build_meta.py", line 404, in _build_with_temp_dir
          self.run_setup()
          ~~~~~~~~~~~~~~^^
        File "/tmp/pip-install-f26imvlu/pillow_d9017647ffda46078aa13f49a6f1fd26/_custom_build/backend.py", line 20, in run_setup
          return super().run_setup(setup_script)
                 ~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^
        File "/tmp/pip-build-env-4bbjth4a/overlay/lib/python3.14t/site-packages/setuptools/build_meta.py", line 317, in run_setup
          exec(code, locals())
          ~~~~^^^^^^^^^^^^^^^^
        File "<string>", line 1069, in <module>
      RequiredDependencyException:
      
      The headers or library files could not be found for zlib,
      a required dependency when compiling Pillow from source.
      
      Please see the install instructions at:
         https://pillow.readthedocs.io/en/latest/installation/basic-installation.html
      
      
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for pillow
ERROR: Failed to build installable wheels for some pyproject.toml based projects (pillow)