Trying a different approach to fix Python 3.13 bindings build on Windows

Author: michaelbautin

.github/workflows/build.yml

@@ -14,12 +14,6 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
-          
-      - name: Install dependencies with pinned NumPy on Win/Py3.13
-        # This step pins NumPy to a working version ONLY for the configuration
-        # that is known to fail with numpy 2.3.0.
-        if: matrix.os == 'windows' && matrix.python-version == '3.13'
-        run: python -m pip install "numpy<2.3"
 
       - name: Build and install
         run: python -m pip install .

setup.py

@@ -29,12 +29,18 @@
 libraries = []
 extra_objects = []
 
+# Add this block to define conditional compile arguments
+macros = []
+if sys.platform == 'win32' and sys.version_info >= (3, 13):
+    print("Enabling Py_TRACE_REFS for Python 3.13+ on Windows")
+    macros.append(('Py_TRACE_REFS', '1'))
 
 ext_modules = [
     Extension(
         'hnswlib',
         source_files,
         include_dirs=include_dirs,
+        define_macros=macros,
         libraries=libraries,
         language='c++',
         extra_objects=extra_objects,