re-pcre: Fix compatibility with big-endian systems.

re-pcre/re.py

@@ -1,3 +1,4 @@
+import sys
 import ffilib
 import array
 
@@ -67,7 +68,7 @@ class PCREPattern:
         assert endpos == -1, "pos: %d, endpos: %d" % (pos, endpos)
         buf = bytes(4)
         pcre_fullinfo(self.obj, None, PCRE_INFO_CAPTURECOUNT, buf)
-        cap_count = int.from_bytes(buf)
+        cap_count = int.from_bytes(buf, sys.byteorder)
         ov = array.array('i', [0, 0, 0] * (cap_count + 1))
         num = pcre_exec(self.obj, None, s, len(s), pos, _flags, ov, len(ov))
         if num == -1: