Cargo Features

libpq has no features set by default.

[dependencies]
libpq = { version = "5.0.0", features = ["v11", "v12", "v13", "v14", "v15", "v16", "v17"] }
v11 v12?
v12 v13? = v11
v13 v14? = v12
v14 v15? = v13

Affects libpq::pipeline

v15 v16? = v14
v16 v17? = v15
v17 = v16

Affects connection::socket_poll, libpq::current_time_usec, pipeline::send_sync