Try to use llvm-readobj

Dockerfile

@@ -7,6 +7,8 @@ WORKDIR /code
 
 COPY ./requirements.txt /code/requirements.txt
 
+RUN bash -c "$(wget -O - https://apt.llvm.org/llvm.sh)"
+
 RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
 
 # Set up a new user named "user" with user ID 1000

main.py

@@ -2,6 +2,7 @@ import editdistance
 import frontmatter
 from hexdump2 import hexdump
 import gradio as gr
+import json
 import shlex
 import subprocess
 import tempfile
@@ -82,6 +83,13 @@ def compile(compiler, flags, source):
     ).stdout
     relocs = trim(relocs, 3)
 
+    json_relocs = subprocess.run(
+        ["llvm-readobj", "--elf-output-style=JSON", "--relocations", temp_o_file_name],
+        capture_output=True,
+        text=True,
+    ).stdout
+    json_relocs = json.loads(json_relocs)
+
     if result.returncode == 0:
         return relocs, compiled_bytes, compile_output, disassembly
     else: