From 99aecdaf65951d9dab9110ed4e114ac329cea6f3 Mon Sep 17 00:00:00 2001
From: Trent Nelson <trent@solana.com>
Date: Thu, 15 Oct 2020 11:37:17 -0600
Subject: [PATCH] Support arbitrary toolchains with cargo wrapper script

---
 cargo | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/cargo b/cargo
index 5c882eeebf..d081ce15f3 100755
--- a/cargo
+++ b/cargo
@@ -17,6 +17,10 @@ case "$1" in
     toolchain="$rust_nightly"
     shift
     ;;
+  +*)
+    toolchain="${1#+}"
+    shift
+    ;;
   *)
     # shellcheck disable=SC2054 # rust_stable is sourced from rust-version.sh
     toolchain="$rust_stable"