diff --git a/tools/build/feature/test-all.c b/tools/build/feature/test-all.c
index 74329957553a..e903b86b742f 100644
--- a/tools/build/feature/test-all.c
+++ b/tools/build/feature/test-all.c
@@ -174,6 +174,10 @@
 # include "test-libaio.c"
 #undef main
 
+#define main main_test_reallocarray
+# include "test-reallocarray.c"
+#undef main
+
 int main(int argc, char *argv[])
 {
 	main_test_libpython();
@@ -214,6 +218,7 @@ int main(int argc, char *argv[])
 	main_test_sdt();
 	main_test_setns();
 	main_test_libaio();
+	main_test_reallocarray();
 
 	return 0;
 }
diff --git a/tools/build/feature/test-reallocarray.c b/tools/build/feature/test-reallocarray.c
index 8170de35150d..8f6743e31da7 100644
--- a/tools/build/feature/test-reallocarray.c
+++ b/tools/build/feature/test-reallocarray.c
@@ -6,3 +6,5 @@ int main(void)
 {
 	return !!reallocarray(NULL, 1, 1);
 }
+
+#undef _GNU_SOURCE