gh-93939: Build C extensions without setup.py (GH-94474)

Combines GH-93940, GH-94452, and GH-94433

2 files changed, 3 insertions, 19 deletions

diff --git a/Tools/scripts/check_extension_modules.py b/Tools/scripts/check_extension_modules.py
index b3f43abf63..59239c62e2 100644
--- a/Tools/scripts/check_extension_modules.py
+++ b/Tools/scripts/check_extension_modules.py
@@ -130,10 +130,11 @@ class ModuleChecker:
     pybuilddir_txt = "pybuilddir.txt"
 
     setup_files = (
-        SRC_DIR / "Modules/Setup",
+        # see end of configure.ac
         "Modules/Setup.local",
-        "Modules/Setup.bootstrap",
         "Modules/Setup.stdlib",
+        "Modules/Setup.bootstrap",
+        SRC_DIR / "Modules/Setup",
     )
 
     def __init__(self, cross_compiling: bool = False, strict: bool = False):
@@ -308,12 +309,6 @@ class ModuleChecker:
         MODBUILT_NAMES: modules in *static* block
         MODSHARED_NAMES: modules in *shared* block
         MODDISABLED_NAMES: modules in *disabled* block
-
-        Modules built by setup.py addext() have a MODULE_{modname}_STATE entry,
-        but are not listed in MODSHARED_NAMES.
-
-        Modules built by old-style setup.py add() have neither a  MODULE_{modname}
-        entry nor an entry in MODSHARED_NAMES.
         """
         moddisabled = set(sysconfig.get_config_var("MODDISABLED_NAMES").split())
         if self.cross_compiling:
diff --git a/Tools/scripts/generate_stdlib_module_names.py b/Tools/scripts/generate_stdlib_module_names.py
index 82f10948b1..92100bd065 100644
--- a/Tools/scripts/generate_stdlib_module_names.py
+++ b/Tools/scripts/generate_stdlib_module_names.py
@@ -12,7 +12,6 @@ from check_extension_modules import ModuleChecker
 
 SRC_DIR = os.path.dirname(os.path.dirname(os.path.dirname(__file__)))
 STDLIB_PATH = os.path.join(SRC_DIR, 'Lib')
-SETUP_PY = os.path.join(SRC_DIR, 'setup.py')
 
 IGNORE = {
     '__init__',
@@ -64,15 +63,6 @@ def list_packages(names):
             names.add(name)
 
 
-# Extension modules built by setup.py
-def list_setup_extensions(names):
-    cmd = [sys.executable, SETUP_PY, "-q", "build", "--list-module-names"]
-    output = subprocess.check_output(cmd)
-    output = output.decode("utf8")
-    extensions = output.splitlines()
-    names |= set(extensions)
-
-
 # Built-in and extension modules built by Modules/Setup*
 # includes Windows and macOS extensions.
 def list_modules_setup_extensions(names):
@@ -103,7 +93,6 @@ def list_frozen(names):
 def list_modules():
     names = set(sys.builtin_module_names)
     list_modules_setup_extensions(names)
-    list_setup_extensions(names)
     list_packages(names)
     list_python_modules(names)
     list_frozen(names)