perf python: Avoid deprecation warning on distutils

Fix the following DeprecationWarning:

  tools/perf/util/setup.py:31: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives

Note: the setuptools module may need installing, for example:

  $ sudo apt install python-setuptools

Reviewer comments:

James said:

Tested it with python 2.7 and 3.8 by running "make install-python_ext PYTHON=..."

Committer notes:

Tested with:

 $ make -k BUILD_BPF_SKEL=1 PYTHON=python3 O=/tmp/build/perf -C tools/perf install-bin ; perf test python

 $ make -k BUILD_BPF_SKEL=1 O=/tmp/build/perf -C tools/perf install-bin ; perf test python
Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220615014206.26651-1-irogers@google.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/setup.py

@@ -11,7 +11,7 @@ def clang_has_option(option):
     return [o for o in cc_output if ((b"unknown argument" in o) or (b"is not supported" in o))] == [ ]
 
 if cc_is_clang:
-    from distutils.sysconfig import get_config_vars
+    from sysconfig import get_config_vars
     vars = get_config_vars()
     for var in ('CFLAGS', 'OPT'):
         vars[var] = sub("-specs=[^ ]+", "", vars[var])
@@ -28,10 +28,10 @@ if cc_is_clang:
         if not clang_has_option("-ffat-lto-objects"):
             vars[var] = sub("-ffat-lto-objects", "", vars[var])
 
-from distutils.core import setup, Extension
+from setuptools import setup, Extension
 
-from distutils.command.build_ext   import build_ext   as _build_ext
-from distutils.command.install_lib import install_lib as _install_lib
+from setuptools.command.build_ext   import build_ext   as _build_ext
+from setuptools.command.install_lib import install_lib as _install_lib
 
 class build_ext(_build_ext):
     def finalize_options(self):