some binary files excluded from codespell check in 'make style'
diff --git a/Makefile.am b/Makefile.am
index aeff37c..6835fe4 100755
--- a/Makefile.am
+++ b/Makefile.am
@@ -42,6 +42,9 @@
 	sh test/test.sh
 
 codespell_skip_files = \
+	*.jar \
+	*.class \
+	*.so \
 	*.a \
 	*.la \
 	*.o \