Make add_dir.sh more tolerant of pre-existing installations.

diff --git a/add_dir.sh b/add_dir.sh
index 36bcf665d47af61e6ed8f6653732489613a06bc6..b8e04bd9a9c3d6b5d124fb1f8182ee2e80a382a4 100755 (executable)
--- a/add_dir.sh
+++ b/add_dir.sh
@@ -13,7 +13,7 @@ link_files_in_dir () {
         [ $(basename "$file") != "." ] && \
         [ $(basename "$file") != ".." ]; then
       dir=$(basename "$file")
-      mkdir "$dir"
+      mkdir -p "$dir"
       cd "$dir"
         link_files_in_dir "$srcdir/$dir"
       cd ..