additional loongarch options

Author: lacraig2

flake.nix

@@ -16,6 +16,10 @@
       hyperfsFromPkgs = pkgs:
         pkgs.callPackage ./src/pkgs/hyperfs { inherit libhc; };
 
+      overlays = [
+        (import ./src/cross-overlays.nix)
+      ];
+
     in rec {
       hyperfs = hyperfsFromPkgs pkgs;
 

src/archs.nix

@@ -43,5 +43,7 @@
   };
   loongarch = {
     config = "loongarch64-linux-musl";
+    gcc.arch = "loongarch64";
+    gcc.abi = "lp64";
   };
 }

src/cross-overlays.nix

@@ -23,4 +23,16 @@
     p11-kit = super.p11-kit.overrideAttrs { doCheck = false; };
   })
 
+  # Add musl support for loongarch64
+  (self: super: {
+    musl = if super.stdenv.hostPlatform.config == "loongarch64-linux-musl"
+      then super.musl.overrideAttrs (oldAttrs: {
+        meta = oldAttrs.meta // {
+          platforms = oldAttrs.meta.platforms ++ ["loongarch64-linux"];
+          badPlatforms = [];
+        };
+      })
+      else super.musl;
+  })
+
 ]