system environment/libraries
- HdrHistogram_c6php-libs - A High Dynamic Range (HDR) Histogram C library
- cassandra-cpp-driver - DataStax C/C++ Driver for Apache Cassandra
- libcouchbase - Couchbase client library
- libcouchbase-libev - Couchbase client library - libev IO back-end
- libcouchbase-libevent - Couchbase client library - libevent IO back-end
- libcouchbase-libuv - Couchbase client library - libuv IO back-end
- librdkafka1php - Apache Kafka C/C++ client library