fixup! Build libtcl, libtk, and _tkinter as shared objects

Author: geofft

cpython-unix/extension-modules.yml

@@ -681,6 +681,19 @@ _tkinter:
   links:
     - tcl8.6
     - tk8.6
+  links-conditional:
+    - name: X11
+      targets:
+        - .*-unknown-linux-.*
+      build-mode: static
+    - name: xcb
+      targets:
+        - .*-unknown-linux-.*
+      build-mode: static
+    - name: Xau
+      targets:
+        - .*-unknown-linux-.*
+      build-mode: static
 
 _tokenize:
   minimum-python-version: "3.11"

pythonbuild/cpython.py

@@ -69,6 +69,7 @@
                 "properties": {
                     "name": {"type": "string"},
                     "targets": {"type": "array", "items": {"type": "string"}},
+                    "build-mode": {"type": "string"},
                 },
                 "additionalProperties": False,
             },
@@ -535,7 +536,12 @@ def derive_setup_local(
                 python_version, entry.get("maximum-python-version", "100.0")
             )
 
-            if target_match and (python_min_match and python_max_match):
+            if build_mode := entry.get("build-mode"):
+                build_mode_match = section == build_mode
+            else:
+                build_mode_match = True
+
+            if target_match and python_min_match and python_max_match and build_mode_match:
                 if source := entry.get("source"):
                     line += f" {source}"
                 for source in entry.get("sources", []):