Fix extension module packaging for macOS/Windows multi-config generators

- Add target-level output directory properties to PRTree in CMakeLists.txt
  to ensure the extension module lands in the correct location for all
  CMake generators (Xcode, Visual Studio, Ninja, Unix Makefiles)
- Add CMAKE_RUNTIME_OUTPUT_DIRECTORY and CMAKE_ARCHIVE_OUTPUT_DIRECTORY
  to setup.py cmake_args to cover all output types
- Ensure extdir exists before CMake build to prevent directory errors
- Add robust error handling in setup.py to fail loudly if extension
  module is not found after build (prevents shipping broken wheels)
- Fix Windows Unicode error in _ci_debug_import.py by replacing
  Unicode checkmark/X characters with ASCII [OK]/[FAIL]

This fixes the ModuleNotFoundError on macOS and Windows CI where the
compiled PRTree extension was not being included in the wheel package.

Author: atksh

CMakeLists.txt

@@ -45,4 +45,13 @@ set_target_properties(PRTree PROPERTIES
 	C_VISIBILITY_PRESET hidden
 	CXX_VISIBILITY_PRESET hidden
   INTERPROCEDURAL_OPTIMIZATION TRUE
+  LIBRARY_OUTPUT_DIRECTORY "${CMAKE_LIBRARY_OUTPUT_DIRECTORY}"
+  RUNTIME_OUTPUT_DIRECTORY "${CMAKE_RUNTIME_OUTPUT_DIRECTORY}"
+  ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_ARCHIVE_OUTPUT_DIRECTORY}"
+  LIBRARY_OUTPUT_DIRECTORY_DEBUG "${CMAKE_LIBRARY_OUTPUT_DIRECTORY_DEBUG}"
+  LIBRARY_OUTPUT_DIRECTORY_RELEASE "${CMAKE_LIBRARY_OUTPUT_DIRECTORY_RELEASE}"
+  RUNTIME_OUTPUT_DIRECTORY_DEBUG "${CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG}"
+  RUNTIME_OUTPUT_DIRECTORY_RELEASE "${CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE}"
+  ARCHIVE_OUTPUT_DIRECTORY_DEBUG "${CMAKE_ARCHIVE_OUTPUT_DIRECTORY_DEBUG}"
+  ARCHIVE_OUTPUT_DIRECTORY_RELEASE "${CMAKE_ARCHIVE_OUTPUT_DIRECTORY_RELEASE}"
 )

setup.py

@@ -56,6 +56,8 @@ def build_extension(self, ext):
 
         cmake_args = [
             "-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=" + extdir,
+            "-DCMAKE_RUNTIME_OUTPUT_DIRECTORY=" + extdir,
+            "-DCMAKE_ARCHIVE_OUTPUT_DIRECTORY=" + extdir,
             "-DPYTHON_EXECUTABLE=" + sys.executable,
             "-DBUILD_SHARED_LIBS=OFF",
         ]
@@ -106,6 +108,8 @@ def build_extension(self, ext):
         )
         if not os.path.exists(self.build_temp):
             os.makedirs(self.build_temp)
+        if not os.path.exists(extdir):
+            os.makedirs(extdir)
 
         subprocess.check_call(
             ["cmake", ext.sourcedir] + cmake_args, cwd=self.build_temp, env=env
@@ -134,8 +138,17 @@ def build_extension(self, ext):
 
                 print(f"Copying extension from {src_file} to {extdir}")
                 shutil.copy2(src_file, extdir)
+                
+                if not os.path.exists(expected_file):
+                    raise RuntimeError(
+                        f"Failed to copy extension module to {expected_file}. "
+                        f"Source was {src_file}"
+                    )
             else:
-                print(f"Warning: Could not find {pattern} in build tree")
+                raise RuntimeError(
+                    f"Could not find compiled extension module {pattern} in build tree. "
+                    f"Build may have failed. Check build logs above."
+                )
 
 
 setup(

tests/_ci_debug_import.py

@@ -15,7 +15,7 @@
 
 try:
     import python_prtree
-    print(f"✓ python_prtree imported successfully")
+    print(f"[OK] python_prtree imported successfully")
     print(f"  Location: {python_prtree.__file__}")
 
     pkg_dir = pathlib.Path(python_prtree.__file__).parent
@@ -28,7 +28,7 @@
     print()
 
     from python_prtree import PRTree3D
-    print(f"✓ PRTree3D imported successfully")
+    print(f"[OK] PRTree3D imported successfully")
     print(f"  PRTree3D: {PRTree3D}")
     print()
 
@@ -38,7 +38,7 @@
     sys.exit(0)
 
 except Exception as e:
-    print(f"✗ IMPORT FAILED: {repr(e)}")
+    print(f"[FAIL] IMPORT FAILED: {repr(e)}")
     print()
     traceback.print_exc()
     print()