rpm-ostree: fix on aarch64-linux by using GCC 11 and passing -lgcc

See NixOS#209113 for context. This has to
be done manually because rpm-ostree doesn't use the Cargo setup hooks (which
automatically set this flag).

pkgs/tools/misc/rpm-ostree/default.nix

@@ -114,6 +114,9 @@ stdenv.mkDerivation rec {
     env NOCONFIGURE=1 ./autogen.sh
   '';
 
+  # https://github.com/NixOS/nixpkgs/issues/201254
+  NIX_LDFLAGS = lib.optionalString (stdenv.isLinux && stdenv.isAarch64 && stdenv.cc.isGNU) "-lgcc";
+
   meta = with lib; {
     description = "A hybrid image/package system. It uses OSTree as an image format, and uses RPM as a component model";
     homepage = "https://coreos.github.io/rpm-ostree/";

pkgs/top-level/all-packages.nix

@@ -11106,6 +11106,8 @@ with pkgs;
 
   rpm-ostree = callPackage ../tools/misc/rpm-ostree {
     gperf = gperf_3_0;
+    # https://github.com/NixOS/nixpkgs/issues/201254
+    stdenv = if stdenv.isLinux && stdenv.isAarch64 && stdenv.cc.isGNU then gcc11Stdenv else stdenv;
   };
 
   rpm2targz = callPackage ../tools/archivers/rpm2targz { };