Fix Windows build in Py3.14.

See python/cpython#133779

Author: scoder

Tools/ci-run.sh

@@ -89,10 +89,15 @@ fi
 echo "===================="
 
 # Install python requirements
+GIL_CFLAGS=""
 echo "Installing requirements [python]"
 if [[ $PYTHON_VERSION == "3.1"[2-9]* ]]; then
   python -m pip install -U pip wheel setuptools || exit 1
-  if [[ $PYTHON_VERSION != *"t" ]]; then
+  if [[ $PYTHON_VERSION == *"t" ]]; then
+    # https://github.com/python/cpython/issues/133779
+    GIL_CFLAGS="-DPy_GIL_DISABLED=0"
+    export CFLAGS="$CFLAGS $GIL_CFLAGS"
+  else
     # twine is not installable on freethreaded Python due to cryptography requirement
     python -m pip install -U twine || exit 1
   fi
@@ -154,6 +159,9 @@ if [[ $OSTYPE == "msys" ]]; then  # for MSVC cl
 else
   CFLAGS="-O0 -ggdb -Wall -Wextra -Wcast-qual -Wconversion -Wdeprecated -Wunused-result"
 fi
+
+CFLAGS="$CFLAGS $GIL_CFLAGS"
+
 # Trying to cover debug assertions in the CI without adding
 # extra jobs. Therefore, odd-numbered minor versions of Python
 # running C++ jobs get NDEBUG undefined, and even-numbered