From 2b7a25b1e24848a2ae5bbd493f2d7fceade0be88 Mon Sep 17 00:00:00 2001
From: whitequark <cz@m-labs.hk>
Date: Fri, 10 Aug 2018 14:53:28 +0000
Subject: [PATCH] Add an ARTIQ-specific cargo feature "rust-1.28".

This cargo feature only exists because (a) ARTIQ uses a fork of Rust,
(b) Rust has some ridiculous renaming going on in the alloc crate,
(c) smoltcp exists because of ARTIQ.

Such features will not be ordinarily provided by smoltcp.
---
 Cargo.toml          | 3 +++
 src/phy/loopback.rs | 4 +++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/Cargo.toml b/Cargo.toml
index 3d6e4c6..4d35282 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -48,6 +48,9 @@ default = [
   "socket-raw", "socket-icmp", "socket-udp", "socket-tcp"
 ]
 
+# experimental; do not use; no guarantees provided that this feature will be kept
+"rust-1.28" = []
+
 [[example]]
 name = "packet2pcap"
 path = "utils/packet2pcap.rs"
diff --git a/src/phy/loopback.rs b/src/phy/loopback.rs
index 58758ff..58df47a 100644
--- a/src/phy/loopback.rs
+++ b/src/phy/loopback.rs
@@ -4,8 +4,10 @@ use std::vec::Vec;
 use std::collections::VecDeque;
 #[cfg(feature = "alloc")]
 use alloc::vec::Vec;
-#[cfg(feature = "alloc")]
+#[cfg(all(feature = "alloc", not(feature = "rust-1.28")))]
 use alloc::collections::VecDeque;
+#[cfg(all(feature = "alloc", feature = "rust-1.28"))]
+use alloc::VecDeque;
 
 use Result;
 use phy::{self, Device, DeviceCapabilities};