From 08b73c1d587305d471f8214ce63baf0f7b00233f Mon Sep 17 00:00:00 2001
From: Yegor Timoshenko <yegortimoshenko@transumption.com>
Date: Wed, 14 Aug 2019 11:59:41 +0000
Subject: [PATCH] buildRustPackage: fix cross-compilation to
 aarch64-unknown-linux-musl

---
 pkgs/build-support/rust/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/build-support/rust/default.nix b/pkgs/build-support/rust/default.nix
index 6afe93c7e4c1b..1eea6b95d349d 100644
--- a/pkgs/build-support/rust/default.nix
+++ b/pkgs/build-support/rust/default.nix
@@ -86,6 +86,10 @@ in stdenv.mkDerivation (args // {
     ${stdenv.lib.optionalString (stdenv.buildPlatform.config != stdenv.hostPlatform.config) ''
     [target."${stdenv.hostPlatform.config}"]
     "linker" = "${ccForHost}"
+    ${# https://github.com/rust-lang/rust/issues/46651#issuecomment-433611633
+      stdenv.lib.optionalString (stdenv.hostPlatform.isMusl && stdenv.hostPlatform.isAarch64) ''
+    "rustflags" = [ "-C", "target-feature=+crt-static", "-C", "link-arg=-lgcc" ]
+    ''}
     ''}
     EOF
     cat .cargo/config