From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 11 Jul 2014 15:56:16 +0200
Subject: always check for __BYTE_ORDER == __BIG_ENDIAN when checking for
 endianess

Let's always stick to glibc's way to determine byte order, and not mix
autoconf-specific checks with gcc checks.
---
 src/shared/architecture.h | 12 ++++++------
 src/shared/gpt.h          |  4 ++--
 src/shared/time-dst.c     |  6 +++---
 3 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/src/shared/architecture.h b/src/shared/architecture.h
index ee50ff4..c98ce63 100644
--- a/src/shared/architecture.h
+++ b/src/shared/architecture.h
@@ -80,7 +80,7 @@ Architecture uname_architecture(void);
 #  define native_architecture() ARCHITECTURE_X86
 #  define LIB_ARCH_TUPLE "i386-linux-gnu"
 #elif defined(__powerpc64__)
-#  if defined(WORDS_BIGENDIAN)
+#  if __BYTE_ORDER == __BIG_ENDIAN
 #    define native_architecture() ARCHITECTURE_PPC64
 #    define LIB_ARCH_TUPLE "ppc64-linux-gnu"
 #  else
@@ -88,7 +88,7 @@ Architecture uname_architecture(void);
 #    define LIB_ARCH_TUPLE  "powerpc64le-linux-gnu"
 #  endif
 #elif defined(__powerpc__)
-#  if defined(WORDS_BIGENDIAN)
+#  if __BYTE_ORDER == __BIG_ENDIAN
 #    define native_architecture() ARCHITECTURE_PPC
 #    define LIB_ARCH_TUPLE "powerpc-linux-gnu"
 #  else
@@ -117,7 +117,7 @@ Architecture uname_architecture(void);
 #  define native_architecture() ARCHITECTURE_SPARC
 #  define LIB_ARCH_TUPLE "sparc-linux-gnu"
 #elif defined(__mips64__)
-#  if defined(WORDS_BIGENDIAN)
+#  if __BYTE_ORDER == __BIG_ENDIAN
 #    define native_architecture() ARCHITECTURE_MIPS64
 #    error "Missing LIB_ARCH_TUPLE for MIPS64"
 #  else
@@ -125,7 +125,7 @@ Architecture uname_architecture(void);
 #    error "Missing LIB_ARCH_TUPLE for MIPS64_LE"
 #  endif
 #elif defined(__mips__)
-#  if defined(WORDS_BIGENDIAN)
+#  if __BYTE_ORDER == __BIG_ENDIAN
 #    define native_architecture() ARCHITECTURE_MIPS
 #    define LIB_ARCH_TUPLE "mips-linux-gnu"
 #  else
@@ -136,7 +136,7 @@ Architecture uname_architecture(void);
 #  define native_architecture() ARCHITECTURE_ALPHA
 #  define LIB_ARCH_TUPLE "alpha-linux-gnu"
 #elif defined(__aarch64__)
-#  if defined(WORDS_BIGENDIAN)
+#  if __BYTE_ORDER == __BIG_ENDIAN
 #    define native_architecture() ARCHITECTURE_ARM64_BE
 #    define LIB_ARCH_TUPLE "aarch64_be-linux-gnu"
 #  else
@@ -144,7 +144,7 @@ Architecture uname_architecture(void);
 #    define LIB_ARCH_TUPLE "aarch64-linux-gnu"
 #  endif
 #elif defined(__arm__)
-#  if defined(WORDS_BIGENDIAN)
+#  if __BYTE_ORDER == __BIG_ENDIAN
 #    define native_architecture() ARCHITECTURE_ARM_BE
 #    if defined(__ARM_EABI__)
 #      if defined(__ARM_PCS_VFP)
diff --git a/src/shared/gpt.h b/src/shared/gpt.h
index 64090e0..278940b 100644
--- a/src/shared/gpt.h
+++ b/src/shared/gpt.h
@@ -42,10 +42,10 @@
 #  define GPT_ROOT_NATIVE GPT_ROOT_X86
 #endif
 
-#if defined(__aarch64__) && !defined(WORDS_BIGENDIAN)
+#if defined(__aarch64__) && (__BYTE_ORDER != __BIG_ENDIAN)
 #  define GPT_ROOT_NATIVE GPT_ROOT_ARM_64
 #  define GPT_ROOT_SECONDARY GPT_ROOT_ARM
-#elif defined(__arm__) && !defined(WORDS_BIGENDIAN)
+#elif defined(__arm__) && (__BYTE_ORDER != __BIG_ENDIAN)
 #  define GPT_ROOT_NATIVE GPT_ROOT_ARM
 #endif
 
diff --git a/src/shared/time-dst.c b/src/shared/time-dst.c
index ceca2fa..6195b11 100644
--- a/src/shared/time-dst.c
+++ b/src/shared/time-dst.c
@@ -207,8 +207,8 @@ read_again:
                 if (type_idxs[i] >= num_types)
                         return -EINVAL;
 
-        if (BYTE_ORDER == BIG_ENDIAN ? sizeof(time_t) == 8 && trans_width == 4
-                                     : sizeof(time_t) == 4 || trans_width == 4) {
+        if (__BYTE_ORDER == __BIG_ENDIAN ? sizeof(time_t) == 8 && trans_width == 4
+                                         : sizeof(time_t) == 4 || trans_width == 4) {
                 /* Decode the transition times, stored as 4-byte integers in
                    network (big-endian) byte order.  We work from the end of
                    the array so as not to clobber the next element to be
@@ -216,7 +216,7 @@ read_again:
                 i = num_transitions;
                 while (i-- > 0)
                         transitions[i] = decode((char *)transitions + i * 4);
-        } else if (BYTE_ORDER != BIG_ENDIAN && sizeof(time_t) == 8) {
+        } else if (__BYTE_ORDER != __BIG_ENDIAN && sizeof(time_t) == 8) {
                 /* Decode the transition times, stored as 8-byte integers in
                    network (big-endian) byte order.  */
                 for (i = 0; i < num_transitions; ++i)
