+namespace {
+const char *babeltrace_bin = CONFIG_BABELTRACE_BIN;
+const char *babeltrace2_bin = CONFIG_BABELTRACE2_BIN;
+
+/*
+ * This is needed for each viewer since we are using execvp().
+ */
+const char *babeltrace_opts[] = { "babeltrace" };
+const char *babeltrace2_opts[] = { "babeltrace2" };
+
+const struct viewer {