system/ByteOrder: testing for endianness in a more general way

Fixes build tests on ia64 and mipsel by testing for endianness in a more general / portable way.

system/ByteOrder: testing for endianness in a more general way
51ec499c · Florian Schlichting · Max Kellermann · 3a4df25d · 51ec499c · 51ec499c
Commit 51ec499c authored Nov 21, 2013 by Florian Schlichting Committed by Max Kellermann Nov 21, 2013
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NEWS NEWS +1 -0

ByteOrder.hxx src/system/ByteOrder.hxx +11 -1

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--- a/NEWS
+++ b/NEWS
 ver 0.18.5 (20??/??/??)
 * decoder
  - fluidsynth: auto-detect by default
+* fix ia64, mipsel and other little-endian architectures
 * fix build failures due to missing includes
 * fix build failure with static libmpdclient


--- a/src/system/ByteOrder.hxx
+++ b/src/system/ByteOrder.hxx
@@ -36,10 +36,20 @@
 /* well-known little-endian */
 #  define IS_LITTLE_ENDIAN true
 #  define IS_BIG_ENDIAN false
-#else
+#elif defined(__MIPSEB__)
 /* well-known big-endian */
 #  define IS_LITTLE_ENDIAN false
 #  define IS_BIG_ENDIAN true
+#else
+/* generic compile-time check */
+#  include <endian.h>
+#  if __BYTE_ORDER == __LITTLE_ENDIAN
+#    define IS_LITTLE_ENDIAN true
+#    define IS_BIG_ENDIAN false
+#  else
+#    define IS_LITTLE_ENDIAN false
+#    define IS_BIG_ENDIAN true
+#  endif
 #endif

 static inline constexpr bool