gdb/python-config: replace deprecated distutils.sysconfig

When running the gdb/configure script on ubuntu 22.04 with
python-3.10.4, I see:

    checking for python... no
    checking for python3... /usr/bin/python3
    [...]/gdb/python/python-config.py:7: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
      from distutils import sysconfig
    [...]/gdb/python/python-config.py:7: DeprecationWarning: The distutils.sysconfig module is deprecated, use sysconfig instead
      from distutils import sysconfig
    [...]/gdb/python/python-config.py:7: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
      from distutils import sysconfig
    [...]/gdb/python/python-config.py:7: DeprecationWarning: The distutils.sysconfig module is deprecated, use sysconfig instead
      from distutils import sysconfig
    [...]/gdb/python/python-config.py:7: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
      from distutils import sysconfig
    [...]/gdb/python/python-config.py:7: DeprecationWarning: The distutils.sysconfig module is deprecated, use sysconfig instead
      from distutils import sysconfig
    checking for python... yes

The distutils module is deprecated as per the PEP 632[1] and will be
removed in python-3.12.

This patch migrates gdb/python/python-config.py from distutils.sysconfig
to the sysconfig module[2].

The sysconfig module has has been introduced in the standard library in
python 3.2.  Given that support for python < 3.2 has been removed by
edae3fd6600f: "gdb/python: remove Python 2 support", this patch does not
need to support both implementations for backward compatibility.

Tested on ubuntu-22.04 and ubuntu 20.04.

[1] https://peps.python.org/pep-0632/
[2] https://docs.python.org/3/library/sysconfig.html

Change-Id: Id0df2baf3ee6ce68bd01c236b829ab4c0a4526f6

1 files changed, 6 insertions, 6 deletions

diff --git a/gdb/python/python-config.py b/gdb/python/python-config.py
index 027d80d..e89e0fd 100644
--- a/gdb/python/python-config.py
+++ b/gdb/python/python-config.py
@@ -4,7 +4,7 @@
 import sys
 import os
 import getopt
-from distutils import sysconfig
+import sysconfig
 
 valid_opts = ["prefix", "exec-prefix", "includes", "libs", "cflags", "ldflags", "help"]
 
@@ -49,15 +49,15 @@ def to_unix_path(path):
 
 for opt in opt_flags:
     if opt == "--prefix":
-        print(to_unix_path(sysconfig.PREFIX))
+        print(to_unix_path(os.path.normpath(sys.prefix)))
 
     elif opt == "--exec-prefix":
-        print(to_unix_path(sysconfig.EXEC_PREFIX))
+        print(to_unix_path(os.path.normpath(sys.exec_prefix)))
 
     elif opt in ("--includes", "--cflags"):
         flags = [
-            "-I" + sysconfig.get_python_inc(),
-            "-I" + sysconfig.get_python_inc(plat_specific=True),
+            "-I" + sysconfig.get_path("include"),
+            "-I" + sysconfig.get_path("platinclude"),
         ]
         if opt == "--cflags":
             flags.extend(getvar("CFLAGS").split())
@@ -76,7 +76,7 @@ for opt in opt_flags:
                 if getvar("LIBPL") is not None:
                     libs.insert(0, "-L" + getvar("LIBPL"))
                 elif os.name == "nt":
-                    libs.insert(0, "-L" + sysconfig.PREFIX + "/libs")
+                    libs.insert(0, "-L" + os.path.normpath(sys.prefix) + "/libs")
             if getvar("LINKFORSHARED") is not None:
                 libs.extend(getvar("LINKFORSHARED").split())
         print(to_unix_path(" ".join(libs)))