diff --git a/lisp/archive/debug-clang.el b/lisp/archive/debug-clang.el
new file mode 100644
index 0000000..8851b61
--- /dev/null
+++ b/lisp/archive/debug-clang.el
@@ -0,0 +1,55 @@
+;; This buffer is for text that is not saved, and for Lisp evaluation.
+;; To create a file, visit it with C-x C-f and enter text in its buffer.
+
+(defvar clang-hash-table (make-hash-table))
+
+(defun attempt-compile (j)
+  (interactive)
+  (aprog1
+      (compilation-start
+       (string-join
+        (list
+         "cd ~/workspace/llvm-project.git/machine-outliner/build/Release/"
+         "ninja clean"
+         (format "ninja -j %d" j))
+        " && "))
+    (with-current-buffer it
+      (add-hook 'compilation-finish-local-sticky
+                (compile-finish-fun j)))))
+
+(defun compile-finish-fun (j)
+  `(lambda (buffer event)
+     (if (not (string-match-p "exited abnormally" event))
+         (message "Compile succeeeded at j=%d" ,j)
+
+       (debug-clang/record-errors ,j buffer)
+       (attempt-compile (- ,j 1)))))
+
+(defun debug-clang/record-errors (j buffer)
+  (let ((buff (find-file-noselect
+               "/home/benson/plaintext/org/org-roam/20230328162512-llvm_won_t_compile.org"))
+        (count 0))
+    (with-current-buffer buff
+      (save-excursion
+        (goto-char (point-max))
+        (insert (format "* Compilation with -j=%d\n\n" j))
+        (dolist (err (debug-clang/get-errors buffer))
+          (insert (format "** Failure %d\n\n" count))
+          (insert "#+begin_quote\n")
+          (insert err)
+          (insert "#+end_quote\n\n")
+          (incf count))))))
+
+(defun debug-clang/get-errors (buffer)
+  (interactive (list (current-buffer)))
+  (with-current-buffer buffer
+    (save-excursion
+      (goto-char (point-min))
+      (let ((regexp (rx (group "FAILED: " (+ nonl) "\n"
+                               (+ (not "[") (+ nonl) "\n"))))
+            l)
+        (while (re-search-forward regexp nil t)
+          (push (match-string 1) l))
+        l)))))
+
+(attempt-compile 40)