Figure out endianness at compile-time, using _BYTE_ORDER from

<machine/endian.h>, rather than writing 1 to a 32-bit variable and checking
whether the first byte is nonzero.

tweaks and ok matthew@; ok beck@ tedu@

1 files changed, 4 insertions, 3 deletions

diff --git a/src/lib/libcrypto/modes/ctr128.c b/src/lib/libcrypto/modes/ctr128.c
index ee642c5863..96af854f8a 100644
--- a/src/lib/libcrypto/modes/ctr128.c
+++ b/src/lib/libcrypto/modes/ctr128.c
@@ -77,11 +77,12 @@ static void ctr128_inc(unsigned char *counter) {
 }
 
 #if !defined(OPENSSL_SMALL_FOOTPRINT)
-static void ctr128_inc_aligned(unsigned char *counter) {
+static void
+ctr128_inc_aligned(unsigned char *counter)
+{
         size_t *data,c,n;
-        const union { long one; char little; } is_endian = {1};
 
-        if (is_endian.little) {
+        if (_BYTE_ORDER == _LITTLE_ENDIAN) {
                 ctr128_inc(counter);
                 return;
         }