Add support for free-threaded Python (#2995)

plugins/python-build/bin/python-build

@@ -822,6 +822,7 @@ build_package_standard_build() {
       use_homebrew_zlib || true
     fi
     use_dsymutil || true
+    use_free_threading || true
   fi
 
   ( if [ "${CFLAGS+defined}" ] || [ "${!PACKAGE_CFLAGS+defined}" ]; then
@@ -1761,6 +1762,12 @@ use_dsymutil() {
   fi
 }
 
+use_free_threading() {
+  if [[ -n "$PYTHON_BUILD_FREE_THREADING" ]]; then
+    package_option python configure --disable-gil
+  fi
+}
+
 build_package_enable_shared() {
     package_option python configure --enable-shared
 }

plugins/python-build/share/python-build/3.13t-dev

@@ -0,0 +1,2 @@
+export PYTHON_BUILD_FREE_THREADING=1
+source "$(dirname "${BASH_SOURCE[0]}")"/3.13-dev

plugins/python-build/share/python-build/3.14t-dev

@@ -0,0 +1,2 @@
+export PYTHON_BUILD_FREE_THREADING=1
+source "$(dirname "${BASH_SOURCE[0]}")"/3.14-dev