Add debug output to build.py

Author: titusz

build.py

@@ -8,8 +8,10 @@ def build(setup_kwargs):
         from Cython.Build import cythonize
 
         use_cython = True
+        print("Cython is available")
     except ImportError:
         use_cython = False
+        print("Cython is not available")
 
     if use_cython:
         try:
@@ -25,8 +27,16 @@ def build(setup_kwargs):
             )
             setup_kwargs.update({"ext_modules": ext_modules})
             print("Cython modules prepared for compilation")
+            print(f"Number of extensions: {len(ext_modules)}")
+            for ext in ext_modules:
+                print(f"Extension: {ext.name}")
         except Exception as e:
             print(f"Failed to prepare Cython modules: {e}")
             print("Falling back to pure Python")
     else:
         print("Cython not available, using pure Python")
+
+    print(f"Current working directory: {os.getcwd()}")
+    print(f"Contents of current directory: {os.listdir('.')}")
+    print(f"Contents of iscc_core directory: {os.listdir('iscc_core')}")
+    print(f"Setup kwargs: {setup_kwargs}")