diff --git a/tools/gn2bp/gen_android_bp b/tools/gn2bp/gen_android_bp
index 7368e26..d75392d 100755
--- a/tools/gn2bp/gen_android_bp
+++ b/tools/gn2bp/gen_android_bp
@@ -1150,6 +1150,22 @@
     merged_cmd.append('fi;')
   return NEWLINE.join(merged_cmd)
 
+def merge_modules(modules, genrule_type):
+  '''
+  :param modules: dictionary whose key is arch name and value is module
+  :param genrule_type: cc_genrule or java_genrule
+  :return: merged module of input modules
+  '''
+  merged_module = list(modules.values())[0]
+
+  # Following attributes must be the same between archs
+  for key in ('out', 'genrule_headers', 'srcs', 'tool_files'):
+    if any([getattr(merged_module, key) != getattr(module, key) for module in modules.values()]):
+      raise Error(f'{merged_module.name} has different values for {key} between archs')
+
+  merged_module.cmd = merge_cmd(modules, genrule_type)
+  return merged_module
+
 def _get_cflags(cflags, defines):
   cflags = {flag for flag in cflags if flag in cflag_allowlist}
   # Consider proper allowlist or denylist if needed