diff --git a/build_all.sh b/build_all.sh
index 2fcac3b..31ef11c 100755
--- a/build_all.sh
+++ b/build_all.sh
@@ -1,5 +1,6 @@
 #!/bin/bash
 
+#compile all tex files except settings
 mkdir -p output
 find ./* -maxdepth 1 -mindepth 1 -type f -name "*.tex" \
      -not -name "settings.tex" \
@@ -7,3 +8,15 @@ find ./* -maxdepth 1 -mindepth 1 -type f -name "*.tex" \
      -not -name "klausuren-Settings-utf8.tex" \
      -print0 | \
     xargs -0 -P 4 -I [] bash -c 'cd "$(dirname "[]")"; latexmk -pdf -outdir=../output "$(basename "[]")";'
+
+echo "finished compiling"
+#cleanup compile help files
+read -p "Delete complile helping files (aux, log, ...)?" -n 1 -r
+
+if [[ $REPLY =~ ^[Yy]$ ]]; then
+    extensions="acn acr alg aux bbl bcf blg -blx.bib dvi fdb_latexmk fls glg glo gls idx ilg ind ist lof log lot maf mtc mtc0 nav nlo out pdfsync ps snm synctex.gz toc vrb xdy tdo .DS_Store"
+
+    for ext in $extensions; do
+        find ./output -maxdepth 1 -mindepth 1 -type f -name "*.$ext" -delete
+    done
+fi