diff --git a/pyphism/phism_runner/runner.py b/pyphism/phism_runner/runner.py
index 85a05d54385..2c8493b0ea5 100644
--- a/pyphism/phism_runner/runner.py
+++ b/pyphism/phism_runner/runner.py
@@ -278,6 +278,7 @@ def polygeist_compile_c(
     ):
         """Compile C/C++ code to MLIR using mlir-clang."""
         src_file, self.cur_file = self.cur_file, self.cur_file.replace(suffix, ".mlir")
+        log_file = src_file.replace(suffix, ".log")
 
         self.run_command(cmd=f'sed -i "s/static//g" {src_file}', shell=True)
         self.run_command(
@@ -304,6 +305,7 @@ def polygeist_compile_c(
                 + (flags if flags else [])
             ),
             stdout=open(self.cur_file, "w"),
+            stderr=open(log_file, "w"),
             shell=True,
             env=self.env,
         )
diff --git a/scripts/rosetta.py b/scripts/rosetta.py
index 3809b0e2025..77a1deb0743 100755
--- a/scripts/rosetta.py
+++ b/scripts/rosetta.py
@@ -1,17 +1,44 @@
 #!/usr/bin/env python3
 
 import argparse
+import functools
+import logging
 import os
 import shutil
+from multiprocessing import Pool
+from typing import Tuple
 
 from pyphism.phism_runner.options import PhismRunnerOptions
 from pyphism.phism_runner.runner import PhismRunner
 from pyphism.utils.helper import get_logger
 
-logger = get_logger("rosetta")
 
+def process(p: Tuple[str, str], vitis_hls_root: str):
+    root, source_file = p
+    top_func = source_file.split(".")[0]
+    options = PhismRunnerOptions(
+        key="{}-{}".format(root.split("/")[-1], source_file.split(".")[0]),
+        source_file=os.path.join(root, source_file),
+        source_dir=root,
+        work_dir=root,
+        sanity_check=False,
+        top_func=top_func,
+    )
+    runner = PhismRunner(options=options)
+    runner.set_cur_file()
+    runner.polygeist_compile_c(
+        flags=[
+            "-I",
+            os.path.abspath(root),
+            "-I",
+            f"{vitis_hls_root}/include",
+            f"--function=*",
+        ],
+        suffix=".cpp",
+    )
 
-def check_polygeist(work_dir: str, vitis_hls_root: str):
+
+def check_polygeist(work_dir: str, vitis_hls_root: str, logger: logging.Logger):
     """"""
     worklist = []
     for root, _, files in os.walk(work_dir):
@@ -26,28 +53,8 @@ def check_polygeist(work_dir: str, vitis_hls_root: str):
             worklist.append((root, source_file))
 
     worklist = set(worklist)
-    for root, source_file in worklist:
-        top_func = source_file.split(".")[0]
-        options = PhismRunnerOptions(
-            key="{}-{}".format(root.split("/")[-1], source_file.split(".")[0]),
-            source_file=os.path.join(root, source_file),
-            source_dir=root,
-            work_dir=root,
-            sanity_check=False,
-            top_func=top_func,
-        )
-        runner = PhismRunner(options=options)
-        runner.set_cur_file()
-        runner.polygeist_compile_c(
-            flags=[
-                "-I",
-                os.path.abspath(root),
-                "-I",
-                f"{vitis_hls_root}/include",
-                f"--function={top_func}",
-            ],
-            suffix=".cpp",
-        )
+    with Pool(len(worklist)) as p:
+        p.map(functools.partial(process, vitis_hls_root=vitis_hls_root), worklist)
 
 
 def main():
@@ -59,7 +66,9 @@ def main():
 
     shutil.copytree(args.source_dir, args.work_dir, dirs_exist_ok=True)
 
-    check_polygeist(args.work_dir, vitis_hls_root=args.vitis_hls_root)
+    logger = get_logger("rosetta", os.path.join(args.work_dir, "phism.log"))
+
+    check_polygeist(args.work_dir, vitis_hls_root=args.vitis_hls_root, logger=logger)
 
 
 if __name__ == "__main__":