fix: fix build

Signed-off-by: Paolo Insogna <paolo@cowtech.it>

Author: ShogunPanda

deps/libffi/sanitize-asm.py

@@ -1,26 +1,33 @@
 #!/usr/bin/env python3
 
 import argparse
-import re
 from pathlib import Path
 
 
 def normalize_path(value):
     return str(value).strip().strip('"')
 
 
-DIRECTIVE_PREFIX = re.compile(r'^\s*\ufeff?#')
+def decode_source(raw):
+    for encoding in ('utf-8-sig', 'utf-16', 'latin-1'):
+        try:
+            return raw.decode(encoding)
+        except UnicodeDecodeError:
+            continue
+    return raw.decode('latin-1', errors='replace')
 
 
 def sanitize_asm(input_path, output_path):
-    source = Path(normalize_path(input_path)).read_text(encoding='utf-8')
+    source = decode_source(Path(normalize_path(input_path)).read_bytes())
+    source = source.replace('\x00', '')
+
     lines = []
     for line in source.splitlines(keepends=True):
-        if DIRECTIVE_PREFIX.match(line):
+        if line.lstrip().startswith('#'):
             continue
         lines.append(line)
 
-    Path(normalize_path(output_path)).write_text(''.join(lines), encoding='utf-8')
+    Path(normalize_path(output_path)).write_text(''.join(lines), encoding='utf-8', newline='')
 
 
 def main(argv=None):