From 6d7976cd57e1f352287869e9ff46e4b3aa3fe333 Mon Sep 17 00:00:00 2001
From: "Jason R. Coombs" <jaraco@jaraco.com>
Date: Sat, 13 Nov 2021 10:13:25 -0500
Subject: [PATCH 1/2] Allow overrides of _multiarch_addendum and
 _sysconfig_name_tmpl, supporting the patches used by pkgsrc. Fixes #16.

---
 distutils/__init__.py  |  7 ++++---
 distutils/sysconfig.py | 33 ++++++++++++++++++++++++---------
 2 files changed, 28 insertions(+), 12 deletions(-)

diff --git a/distutils/__init__.py b/distutils/__init__.py
index 0ba5e44a..8fd493b4 100644
--- a/distutils/__init__.py
+++ b/distutils/__init__.py
@@ -15,9 +15,10 @@
 
 
 try:
-    # Allow Debian (only) to customize system behavior.
-    # Ref pypa/distutils#2. This hook is deprecated and
-    # no other environments should use it.
+    # Allow Debian and pkgsrc (only) to customize system
+    # behavior. Ref pypa/distutils#2 and pypa/distutils#16.
+    # This hook is deprecated and no other environments
+    # should use it.
     importlib.import_module('_distutils_system_mod')
 except ImportError:
     pass
diff --git a/distutils/sysconfig.py b/distutils/sysconfig.py
index 1c025892..e5b2177c 100644
--- a/distutils/sysconfig.py
+++ b/distutils/sysconfig.py
@@ -279,14 +279,23 @@ def get_config_h_filename():
     return os.path.join(inc_dir, 'pyconfig.h')
 
 
+_makefile_tmpl = 'config-{python_ver}{build_flags}{multiarch}'
+
+
 def get_makefile_filename():
     """Return full pathname of installed Makefile from the Python build."""
     if python_build:
         return os.path.join(_sys_home or project_base, "Makefile")
     lib_dir = get_python_lib(plat_specific=0, standard_lib=1)
-    config_file = 'config-{}{}'.format(get_python_version(), build_flags)
-    if hasattr(sys.implementation, '_multiarch'):
-        config_file += '-%s' % sys.implementation._multiarch
+    multiarch = (
+        '-%s' % sys.implementation._multiarch
+        if hasattr(sys.implementation, '_multiarch') else ''
+    )
+    config_file = _makefile_tmpl.format(
+        python_ver=get_python_version(),
+        build_flags=build_flags,
+        multiarch=multiarch,
+    )
     return os.path.join(lib_dir, config_file, 'Makefile')
 
 
@@ -458,15 +467,21 @@ def expand_makefile_vars(s, vars):
 
 _config_vars = None
 
+
+_sysconfig_name_tmpl = '_sysconfigdata_{abi}_{platform}_{multiarch}'
+
+
 def _init_posix():
     """Initialize the module as appropriate for POSIX systems."""
     # _sysconfigdata is generated at build time, see the sysconfig module
-    name = os.environ.get('_PYTHON_SYSCONFIGDATA_NAME',
-        '_sysconfigdata_{abi}_{platform}_{multiarch}'.format(
-        abi=sys.abiflags,
-        platform=sys.platform,
-        multiarch=getattr(sys.implementation, '_multiarch', ''),
-    ))
+    name = os.environ.get(
+        '_PYTHON_SYSCONFIGDATA_NAME',
+        _sysconfig_name_tmpl.format(
+            abi=sys.abiflags,
+            platform=sys.platform,
+            multiarch=getattr(sys.implementation, '_multiarch', ''),
+        ),
+    )
     try:
         _temp = __import__(name, globals(), locals(), ['build_time_vars'], 0)
     except ImportError:

From 39539509f009e5e77fa578e969badf591fe15e42 Mon Sep 17 00:00:00 2001
From: "Jason R. Coombs" <jaraco@jaraco.com>
Date: Wed, 17 Nov 2021 21:04:24 -0500
Subject: [PATCH 2/2] Add comments to help protect these interfaces from
 refactoring without consideration.

---
 distutils/sysconfig.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/distutils/sysconfig.py b/distutils/sysconfig.py
index e5b2177c..9f980d6a 100644
--- a/distutils/sysconfig.py
+++ b/distutils/sysconfig.py
@@ -279,6 +279,7 @@ def get_config_h_filename():
     return os.path.join(inc_dir, 'pyconfig.h')
 
 
+# Allow this value to be patched by pkgsrc. Ref pypa/distutils#16.
 _makefile_tmpl = 'config-{python_ver}{build_flags}{multiarch}'