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.

1 files changed, 3 insertions, 1 deletions

diff --git a/pkgs/development/compilers/rust/rustc.nix b/pkgs/development/compilers/rust/rustc.nix
index 43d603923c97..64254d502529 100644
--- a/pkgs/development/compilers/rust/rustc.nix
+++ b/pkgs/development/compilers/rust/rustc.nix
@@ -52,7 +52,9 @@ in stdenv.mkDerivation rec {
        # when linking stage1 libstd: cc: undefined reference to `__cxa_begin_catch'
        optional (stdenv.isLinux && !withBundledLLVM) "--push-state --as-needed -lstdc++ --pop-state"
     ++ optional (stdenv.isDarwin && !withBundledLLVM) "-lc++"
-    ++ optional stdenv.isDarwin "-rpath ${llvmSharedForHost}/lib");
+    ++ optional stdenv.isDarwin "-rpath ${llvmSharedForHost}/lib"
+       # https://github.com/NixOS/nixpkgs/issues/201254
+    ++ optional (stdenv.isLinux && stdenv.isAarch64 && stdenv.cc.isGNU) "-lgcc");
 
   # Increase codegen units to introduce parallelism within the compiler.
   RUSTFLAGS = "-Ccodegen-units=10";