gnat14: add aarch64-linux support

alire-project/GNAT-FSF-builds bootstrap binaries only exist since
version 14 so I couldn't add support for versions <14

pkgs/development/compilers/gnat-bootstrap/default.nix

@@ -1,5 +1,5 @@
 { stdenv, lib, autoPatchelfHook, fetchzip, xz, ncurses5, ncurses, readline, gmp, mpfr
-, expat, libipt, zlib, dejagnu, sourceHighlight, python3, elfutils, guile, glibc
+, expat, libipt, zlib, dejagnu, sourceHighlight, python3, elfutils, guile, glibc, zstd
 , majorVersion
 }:
 
@@ -69,6 +69,11 @@ stdenv.mkDerivation(finalAttrs:
         hash = "sha256-pH3IuOpCM9sY/ppTYcxBmgpsUiMrisIjmAa/rmmZXb4=";
         upstreamTriplet = "x86_64-pc-linux-gnu";
       };
+      aarch64-linux = {
+        inherit url;
+        hash = "sha256-SVW/0yyj6ZH1GAjvD+unII+zSLGd3KGFt1bjjQ3SEFU=";
+        upstreamTriplet = "aarch64-linux-gnu";
+      };
     }.${stdenv.hostPlatform.system} or throwUnsupportedSystem;
   };
   inherit (versionMap.${majorVersion}) gccVersion alireRevision upstreamTriplet;
@@ -107,6 +112,11 @@ in {
     ncurses5
   ] ++ [
     xz
+  ] ++ lib.optionals (lib.versionAtLeast majorVersion "14"
+      && stdenv.hostPlatform.isAarch64
+      && stdenv.hostPlatform.isLinux) [
+    # not sure why the bootstrap binaries link to zstd only on this architecture but they do
+    zstd
   ];
 
   strictDeps = true;
@@ -187,7 +197,7 @@ in {
     homepage = "https://www.gnu.org/software/gnat";
     license = licenses.gpl3;
     maintainers = with maintainers; [ ethindp ];
-    platforms = [ "x86_64-linux" "x86_64-darwin" ];
+    platforms = [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" ];
     sourceProvenance = with lib.sourceTypes; [ binaryNativeCode ];
   };
 })

pkgs/top-level/all-packages.nix

@@ -5779,7 +5779,7 @@ with pkgs;
       if stdenv.hostPlatform == stdenv.targetPlatform
          && stdenv.buildPlatform == stdenv.hostPlatform
       then buildPackages.gnat-bootstrap14
-      else buildPackages.gnat13;
+      else buildPackages.gnat14;
     stdenv =
       if stdenv.hostPlatform == stdenv.targetPlatform
          && stdenv.buildPlatform == stdenv.hostPlatform