rust: fix on aarch64-linux by using GCC 11 and passing `-lgcc`

This change switches to using GCC 11 by default on aarch64-linux, as well as passing `-lgcc` to the linker, per #201485.

See #201254 and #208412 for wider context on the issue.

2 files changed, 5 insertions, 0 deletions

diff --git a/pkgs/build-support/rust/hooks/cargo-setup-hook.sh b/pkgs/build-support/rust/hooks/cargo-setup-hook.sh
index aeddeef29d928..8146573e79dba 100644
--- a/pkgs/build-support/rust/hooks/cargo-setup-hook.sh
+++ b/pkgs/build-support/rust/hooks/cargo-setup-hook.sh
@@ -1,6 +1,8 @@
 cargoSetupPostUnpackHook() {
     echo "Executing cargoSetupPostUnpackHook"
 
+    export NIX_LDFLAGS+=" @aarch64LinuxGccWorkaround@"
+
     # Some cargo builds include build hooks that modify their own vendor
     # dependencies. This copies the vendor directory into the build tree and makes
     # it writable. If we're using a tarball, the unpackFile hook already handles
diff --git a/pkgs/build-support/rust/hooks/default.nix b/pkgs/build-support/rust/hooks/default.nix
index b9bbac3719859..9989e582d2e9a 100644
--- a/pkgs/build-support/rust/hooks/default.nix
+++ b/pkgs/build-support/rust/hooks/default.nix
@@ -108,6 +108,9 @@ in {
           host-config = true
           target-applies-to-host = true
         '';
+
+        # https://github.com/NixOS/nixpkgs/issues/201254
+        aarch64LinuxGccWorkaround = lib.optionalString (stdenv.isLinux && stdenv.isAarch64 && stdenv.cc.isGNU) "-lgcc";
       };
     } ./cargo-setup-hook.sh) {};