Revert "Disable free-threaded builds"

This reverts commit 70de8d8.

Author: zanieb

ci-targets.yaml

@@ -264,13 +264,12 @@ linux:
       - debug
       - noopt
       - lto
-    # freethreaded builds require mimalloc which is not available on musl yet
-    # build_options_conditional:
-    #   - options:
-    #       - freethreaded+debug
-    #       - freethreaded+noopt
-    #       - freethreaded+lto
-    #     minimum-python-version: "3.13"
+    build_options_conditional:
+      - options:
+          - freethreaded+debug
+          - freethreaded+noopt
+          - freethreaded+lto
+        minimum-python-version: "3.13"
     run: true
 
   x86_64_v2-unknown-linux-musl:
@@ -291,13 +290,12 @@ linux:
       - debug
       - noopt
       - lto
-    # freethreaded builds require mimalloc which is not available on musl yet
-    # build_options_conditional:
-    #   - options:
-    #       - freethreaded+debug
-    #       - freethreaded+noopt
-    #       - freethreaded+lto
-    #     minimum-python-version: "3.13"
+    build_options_conditional:
+      - options:
+          - freethreaded+debug
+          - freethreaded+noopt
+          - freethreaded+lto
+        minimum-python-version: "3.13"
     run: true
 
   x86_64_v3-unknown-linux-musl:
@@ -318,13 +316,12 @@ linux:
       - debug
       - noopt
       - lto
-    # freethreaded builds require mimalloc which is not available on musl yet
-    # build_options_conditional:
-    #   - options:
-    #       - freethreaded+debug
-    #       - freethreaded+noopt
-    #       - freethreaded+lto
-    #     minimum-python-version: "3.13"
+    build_options_conditional:
+      - options:
+          - freethreaded+debug
+          - freethreaded+noopt
+          - freethreaded+lto
+        minimum-python-version: "3.13"
     run: true
 
   x86_64_v4-unknown-linux-musl:
@@ -345,13 +342,12 @@ linux:
       - debug
       - noopt
       - lto
-    # freethreaded builds require mimalloc which is not available on musl yet
-    # build_options_conditional:
-    #   - options:
-    #       - freethreaded+debug
-    #       - freethreaded+noopt
-    #       - freethreaded+lto
-    #     minimum-python-version: "3.13"
+    build_options_conditional:
+      - options:
+          - freethreaded+debug
+          - freethreaded+noopt
+          - freethreaded+lto
+        minimum-python-version: "3.13"
     run: true
 
 windows:

cpython-unix/build-cpython.sh

@@ -422,7 +422,7 @@ if [ -n "${CPYTHON_DEBUG}" ]; then
 fi
 
 # Explicitly enable mimalloc on 3.13+, it's already included by default but with this it'll fail
-# if it's missing from the system. The musl builds do not supprt mimalloc yet.
+# if it's missing from the system. The MUSL builds do not supprt mimalloc yet.
 if [[ -n "${PYTHON_MEETS_MINIMUM_VERSION_3_13}" && "${CC}" != "musl-clang" ]]; then
     CONFIGURE_FLAGS="${CONFIGURE_FLAGS} --with-mimalloc"
 fi