Add missing include needed to run tests which use usleep --- clucene-core-2.3.3.4/src/test/test.h 2011-03-17 00:21:07.000000000 +0000 +++ clucene-core-2.3.3.4/src/test/test.h 2017-12-27 09:43:25.320000000 +0000 @@ -23,6 +23,7 @@ #include <iostream> #include <string.h> #include <stdio.h> +#include <unistd.h> using namespace std;