From a1f14005ab823adc1300754fd37c01e9842ed4bc Mon Sep 17 00:00:00 2001
From: Brian Wellington <bwelling@xbill.org>
Date: Thu, 21 Feb 2019 16:50:05 -0800
Subject: [PATCH] Fix big-endian build. (#5205)

For some reason, Offset<T> is being considered a scalar, which
causes EndianSwap to be passed an Offset<T>.  This doesn't work,
as it does not support types with non-trivial constructors.  This
change adds an overload to WriteScalar(), which works around this.
---
 include/flatbuffers/base.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/flatbuffers/base.h b/include/flatbuffers/base.h
index 3e6afc69c..a64a587f2 100644
--- a/include/flatbuffers/base.h
+++ b/include/flatbuffers/base.h
@@ -363,6 +363,11 @@ void WriteScalar(void *p, T t) {
   *reinterpret_cast<T *>(p) = EndianScalar(t);
 }
 
+template<typename T> struct Offset;
+template<typename T> __supress_ubsan__("alignment") void WriteScalar(void *p, Offset<T> t) {
+  *reinterpret_cast<uoffset_t *>(p) = EndianScalar(t.o);
+}
+
 // Computes how many bytes you'd have to pad to be able to write an
 // "scalar_size" scalar if the buffer had grown to "buf_size" (downwards in
 // memory).