[nix] draft vcs linking

difftest/vcs-emu.nix

@@ -0,0 +1,65 @@
+{ lib
+, callPackage
+, elaborateConfig
+
+, rustPlatform
+
+, rust-analyzer
+, rust-bindgen
+
+, vcs-lib
+
+, cmake
+, clang-tools
+}:
+
+let
+  spike_interfaces = callPackage ./spike_interfaces { };
+
+  self = rustPlatform.buildRustPackage {
+    name = "t1-vcs-emu";
+    src = with lib.fileset; toSource {
+      root = ./.;
+      fileset = unions [
+        ./spike_rs
+        ./offline
+        ./online_dpi
+        ./online_vcs
+        ./test_common
+        ./Cargo.lock
+        ./Cargo.toml
+      ];
+    };
+
+    buildInputs = [
+      spike_interfaces
+      vcs-lib
+    ];
+
+    buildFeatures = lib.optionals vcs-lib.enable-trace [ "trace" ];
+
+    env = {
+      VCS_LIB_DIR = "${vcs-lib}/lib";
+      DESIGN_VLEN = elaborateConfig.parameter.vLen;
+      DESIGN_DLEN = elaborateConfig.parameter.dLen;
+    };
+
+    cargoLock = {
+      lockFile = ./Cargo.lock;
+    };
+
+    dontUseCmakeConfigure = true;
+
+    passthru = {
+      devShell = self.overrideAttrs (old: {
+        nativeBuildInputs = old.nativeBuildInputs ++ [
+          rust-analyzer
+          rust-bindgen
+          clang-tools
+        ];
+      });
+      inherit spike_interfaces;
+    };
+  };
+in
+self

nix/t1/default.nix

@@ -117,8 +117,8 @@ lib.makeScope newScope
           };
           vcs-emu-compiled = innerSelf.callPackage ./vcs.nix { rtl = vcs-emu-rtl; };
           vcs-emu-compiled-trace = innerSelf.callPackage ./vcs.nix { rtl = vcs-emu-rtl; enable-trace = true; };
-          vcs-emu = innerSelf.callPackage ../../difftest/default.nix { vcs-lib = vcs-emu-compiled; };
-          vcs-emu-trace = innerSelf.callPackage ../../difftest/default.nix { vcs-lib = vcs-emu-compiled-trace; };
+          vcs-emu = innerSelf.callPackage ../../difftest/vcs-emu.nix { vcs-lib = vcs-emu-compiled; };
+          vcs-emu-trace = innerSelf.callPackage ../../difftest/vcs-emu.nix { vcs-lib = vcs-emu-compiled-trace; };
         };
 
         subsystem = rec {