Improve endian detection. (#5204)

Add support for using __BYTE_ORDER__, to support platforms where g++ doesn't explicitly define __BIG_ENDIAN__, like Solaris Sparc.

Improve endian detection. (#5204)
Add support for using __BYTE_ORDER__, to support platforms where g++ doesn't explicitly define __BIG_ENDIAN__, like Solaris Sparc.
bb584420 · bwelling · Wouter van Oortmerssen · 4567b131 · bb584420
Commit bb584420 authored Feb 21, 2019 by bwelling Committed by Wouter van Oortmerssen Feb 21, 2019
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base.h include/flatbuffers/base.h +2 -1

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--- a/include/flatbuffers/base.h
+++ b/include/flatbuffers/base.h
@@ -118,7 +118,8 @@
 #endif // __s390x__
 #if !defined(FLATBUFFERS_LITTLEENDIAN)
  #if defined(__GNUC__) || defined(__clang__)
-    #ifdef __BIG_ENDIAN__
+    #if (defined(__BIG_ENDIAN__) || \
+         (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__))
      #define FLATBUFFERS_LITTLEENDIAN 0
    #else
      #define FLATBUFFERS_LITTLEENDIAN 1