+2021-02-17 Userspace RCU 0.12.2
+ * fix: exclude clang from GCC version blacklists
+ * aarch64: blacklist gcc prior to 5.1
+ * Fix: configure: support Autoconf 2.70
+ * fix: bump tests thread limit to 4096
+ * cleanup: Improve wording of CONFIG_RCU_DEBUG description
+ * fix: explicitly include urcu/config.h in files using CONFIG_RCU_ defines
+ * Fix typo in README.md
+ * fix: add -lurcu-common to pkg-config libs for each flavor
+ * call_rcu: Fix race between rcu_barrier() and call_rcu_data_free()
+
+2020-04-22 Userspace RCU 0.12.1
+ * Fix: tls-compat.h exposes compiler-dependent public configuration
+ * Fix: tap array subscript has type char warning
+