diff --git a/src/sed-dir b/src/sed-dir
new file mode 100644
index 00000000..b627066e
--- /dev/null
+++ b/src/sed-dir
@@ -0,0 +1,20 @@
+s/yylex/bgl_dir_lex/g
+s/yyerror/bgl_dir_error/g
+s/yylval/bgl_dir_lval/g
+s/yychar/bgl_dir_char/g
+s/yydebug/bgl_dir_debug/g
+s/yynerrs/bgl_dir_nerrs/g
+s/yyin/bgl_dir_in/g
+s/yyout/bgl_dir_out/g
+s/yy_create_buffer/bgl_dir_create_buffer/g
+s/yy_load_buffer_state/bgl_dir_load_buffer_state/g
+s/yyrestart/bgl_dir_restart/g
+s/yy_init_buffer/bgl_dir_init_buffer/g
+s/yy_switch_to_buffer/bgl_dir_switch_to_buffer/g
+s/yy_delete_buffer/bgl_dir_delete_buffer/g
+s/yy_flush_buffer/bgl_dir_flush_buffer/g
+s/yy_scan_buffer/bgl_dir_scan_buffer/g
+s/yy_scan_string/bgl_dir_scan_string/g
+s/yy_scan_bytes/bgl_dir_scan_bytes/g
+s/yyleng/bgl_dir_leng/g
+s/yytext/bgl_dir_text/g
diff --git a/src/sed-undir b/src/sed-undir
new file mode 100644
index 00000000..e2ec4d34
--- /dev/null
+++ b/src/sed-undir
@@ -0,0 +1,20 @@
+s/yylex/bgl_undir_lex/g
+s/yyerror/bgl_undir_error/g
+s/yylval/bgl_undir_lval/g
+s/yychar/bgl_undir_char/g
+s/yydebug/bgl_undir_debug/g
+s/yynerrs/bgl_undir_nerrs/g
+s/yyin/bgl_undir_in/g
+s/yyout/bgl_undir_out/g
+s/yy_create_buffer/bgl_undir_create_buffer/g
+s/yy_load_buffer_state/bgl_undir_load_buffer_state/g
+s/yyrestart/bgl_undir_restart/g
+s/yy_init_buffer/bgl_undir_init_buffer/g
+s/yy_switch_to_buffer/bgl_undir_switch_to_buffer/g
+s/yy_delete_buffer/bgl_undir_delete_buffer/g
+s/yy_flush_buffer/bgl_undir_flush_buffer/g
+s/yy_scan_buffer/bgl_undir_scan_buffer/g
+s/yy_scan_string/bgl_undir_scan_string/g
+s/yy_scan_bytes/bgl_undir_scan_bytes/g
+s/yyleng/bgl_undir_leng/g
+s/yytext/bgl_undir_text/g