fix build of tests

Change-Id: I904ff05ab269c7d6a0fa1e8a683fed086b126100

diff --git a/tests/cxx/t-locale.cc b/tests/cxx/t-locale.cc
index fb3b8a7aa217b7d5f3065c50a28d9fa8e7c0160d..6382806d2ee2288c7e94d583996aa50989ffd0e5 100644 (file)
--- a/tests/cxx/t-locale.cc
+++ b/tests/cxx/t-locale.cc
@@ -21,6 +21,7 @@ MA 02110-1301, USA. */
 
 #include <clocale>
 #include <iostream>
+#include <cstdlib>
 
 #include "gmp.h"
 #include "gmp-impl.h"