Fix build

tests/perfmodels/regression_based_04.c

@@ -336,6 +336,10 @@ int main(int argc, char **argv)
 	ret = starpu_task_wait_for_all();
 	STARPU_CHECK_RETURN_VALUE(ret, "starpu_task_wait_for_all");
 
+#ifdef STARPU_USE_OPENCL
+	ret = starpu_opencl_unload_opencl(&opencl_program);
+	STARPU_CHECK_RETURN_VALUE(ret, "starpu_opencl_unload_opencl");
+#endif
 	starpu_shutdown();
 
 
@@ -349,9 +353,11 @@ int main(int argc, char **argv)
 	if (ret == -ENODEV) return STARPU_TEST_SKIPPED;
 	STARPU_CHECK_RETURN_VALUE(ret, "starpu_init");
 
+#ifdef STARPU_USE_OPENCL
 	ret = starpu_opencl_load_opencl_from_file("tests/perfmodels/opencl_memset_kernel.cl",
 			&opencl_program, NULL);
 	STARPU_CHECK_RETURN_VALUE(ret, "starpu_opencl_load_opencl_from_file");
+#endif
 
 	/* Now create a dummy task just to estimate its duration according to the regression */