Don't ignore the bc directory
diff --git a/.gitignore b/.gitignore
index 01642d8..b88b9c0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@
 *.includes
 *.creator.user
 bc
+!bc/
 *.o
 *.a
 arbprec/tests/add