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--- src/google/protobuf/stubs/port.h.orig 2017-08-15 23:39:12 UTC
+++ src/google/protobuf/stubs/port.h
@@ -256,8 +256,11 @@ static const uint64 kuint64max = GOOGLE_
# define GOOGLE_PROTOBUF_USE_UNALIGNED 0
#else
// x86 and x86-64 can perform unaligned loads/stores directly.
-# define GOOGLE_PROTOBUF_USE_UNALIGNED defined(_M_X64) || \
- defined(__x86_64__) || defined(_M_IX86) || defined(__i386__)
+# if defined(_M_X64) || defined(__x86_64__) || defined(_M_IX86) || defined(__i386__)
+# define GOOGLE_PROTOBUF_USE_UNALIGNED 1
+# else
+# define GOOGLE_PROTOBUF_USE_UNALIGNED 0
+# endif
#endif
#if GOOGLE_PROTOBUF_USE_UNALIGNED
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