Minor update

setup.py

@@ -14,7 +14,18 @@
     "exprtk-custom-types",
 ]
 
+def list_files(start_path):
+    for root, _, files in os.walk(start_path):
+        level = root.replace(start_path, "").count(os.sep)
+        indent = " " * 4 * (level)
+        print("{}{}/".format(indent, os.path.basename(root)))
+        sub_indent = " " * 4 * (level + 1)
+        for f in files:
+            print("{}{}".format(sub_indent, f))
+
+
 if os.path.exists(mpfr_include := "/opt/homebrew/Cellar/mpfr"):
+    list_files(mpfr_include)
     include_dirs.append(mpfr_include)
 
 # noinspection PyTypeChecker