Merge from gnulib

This incorporates:
2016-11-27 md4,md5,sha*: tune for recent glibc _STRING_INLINE_unaligned
2016-11-21 snippet/c++defs: Simplify _GL_CXXALIAS_* macros.
* build-aux/snippet/c++defs.h:
* lib/md5.c, lib/sha1.c, lib/sha256.c, lib/sha512.c:
Copy from gnulib.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/sha1.c b/lib/sha1.c
index 45f1cbefd18..753c0884d8b 100644
--- a/lib/sha1.c
+++ b/lib/sha1.c
@@ -246,7 +246,7 @@ sha1_process_bytes (const void *buffer, size_t len, struct sha1_ctx *ctx)
   /* Process available complete blocks.  */
   if (len >= 64)
     {
-#if !_STRING_ARCH_unaligned
+#if !(_STRING_ARCH_unaligned || _STRING_INLINE_unaligned)
 # define UNALIGNED_P(p) ((uintptr_t) (p) % alignof (uint32_t) != 0)
       if (UNALIGNED_P (buffer))
         while (len > 64)