+ /*
+ * Allow legacy applications compiled without
+ * _LGPL_SOURCE to use v1 API. Those are not
+ * required to be linked against liburcu-bp,
+ * so in those situations the liburcu-bp symbols
+ * are not present in the global symbol table,
+ * and we do not need to call urcu-bp
+ * synchronize.
+ *
+ * However, nothing prevents a _LGPL_SOURCE
+ * instrumented library loaded afterwards to
+ * require liburcu-bp, so we need to check again
+ * in that situation.
+ */