macos: add "required" to build info

Author: indygreg

cpython-macos/build.py

@@ -44,6 +44,17 @@
     b'spwd',
 }
 
+REQUIRED_EXTENSIONS = {
+    '_codecs',
+    '_io',
+    '_signal',
+    '_thread',
+    '_tracemalloc',
+    '_weakref',
+    'faulthandler',
+    'posix',
+}
+
 LOG_PREFIX = [None]
 LOG_FH = [None]
 
@@ -276,6 +287,10 @@ def process_setup_line(line):
             'variant': 'default',
         }]
 
+    for extension, entries in bi['extensions'].items():
+        for entry in entries:
+            entry['required'] = extension in REQUIRED_EXTENSIONS
+
     # Any paths left in modules_objs are not part of any extensions and
     # are instead part of the core distribution.
     for p in sorted(modules_objs):