https://bugs.gentoo.org/871036
--- a/sgrep.h
+++ b/sgrep.h
@@ -20,2 +20,3 @@
 #include <stdlib.h>
+#include <string.h>
 #include <assert.h>
@@ -616,2 +617,3 @@
 int create_index(const IndexOptions *options);
+int index_query(IndexOptions *options, int argc, char *argv[]);
 int add_region_to_index(struct IndexWriterStruct *writer,