speccpu: support build_type for SPEC commands

src/speccpu/__init__.py

@@ -1,4 +1,5 @@
 import copy
+import enum
 import os
 from collections.abc import MutableMapping
 from pathlib import Path
@@ -99,6 +100,11 @@ class SPEC:
     def env(self):
         return create_spec_env(self.dir)
 
+    class BuildType(enum.Enum):
+        Default = "default"
+        Nobuild = "nobuild"
+        Rebuild = "rebuild"
+
     def mkcmd_runcpu(
         self,
         config: str,
@@ -106,6 +112,7 @@ class SPEC:
         setprocgroup: bool = True,
         workload: str = "ref",
         output_root: Path | None = None,
+        build_type: BuildType = BuildType.Default,
     ):
         return [
             "runcpu",
@@ -116,6 +123,8 @@ class SPEC:
             config,
             *(["--output_root", str(output_root)] if output_root else []),
             *benchmarks,
+            *(["--nobuild"] if build_type == self.BuildType.Nobuild else []),
+            *(["--rebuild"] if build_type == self.BuildType.Rebuild else []),
         ]