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.

5 files changed, 29 insertions, 19 deletions

diff --git a/build-aux/snippet/c++defs.h b/build-aux/snippet/c++defs.h
index d42ea25d852..2b819da5e07 100644
--- a/build-aux/snippet/c++defs.h
+++ b/build-aux/snippet/c++defs.h
@@ -133,8 +133,11 @@
       static const struct _gl_ ## func ## _wrapper            \
       {                                                       \
         typedef rettype (*type) parameters;                   \
-        inline type rpl () const { return ::rpl_func; }       \
-        inline operator type () const  { return rpl (); }     \
+                                                              \
+        inline operator type () const                         \
+        {                                                     \
+          return ::rpl_func;                                  \
+        }                                                     \
       } func = {};                                            \
     }                                                         \
     _GL_EXTERN_C int _gl_cxxalias_dummy
@@ -155,9 +158,11 @@
       static const struct _gl_ ## func ## _wrapper                 \
       {                                                            \
         typedef rettype (*type) parameters;                        \
-        inline type rpl () const                                   \
-        { return reinterpret_cast<type>(::rpl_func); }             \
-        inline operator type () const { return rpl (); }           \
+                                                                   \
+        inline operator type () const                              \
+        {                                                          \
+          return reinterpret_cast<type>(::rpl_func);               \
+        }                                                          \
       } func = {};                                                 \
     }                                                              \
     _GL_EXTERN_C int _gl_cxxalias_dummy
@@ -183,10 +188,13 @@
       static const struct _gl_ ## func ## _wrapper            \
       {                                                       \
         typedef rettype (*type) parameters;                   \
-        inline type rpl () const { return ::func; }           \
-        inline operator type () const { return rpl (); }      \
+                                                              \
+        inline operator type () const                         \
+        {                                                     \
+          return ::func;                                      \
+        }                                                     \
       } func = {};                                            \
-    }                                              \
+    }                                                         \
     _GL_EXTERN_C int _gl_cxxalias_dummy
 #else
 # define _GL_CXXALIAS_SYS(func,rettype,parameters) \
@@ -205,9 +213,11 @@
       static const struct _gl_ ## func ## _wrapper      \
       {                                                 \
         typedef rettype (*type) parameters;             \
-        inline type rpl () const                        \
-        { return reinterpret_cast<type>(::func); }      \
-        inline operator type () const { return rpl (); }\
+                                                        \
+        inline operator type () const                   \
+        {                                               \
+          return reinterpret_cast<type>(::func);        \
+        }                                               \
       } func = {};                                      \
     }                                                   \
     _GL_EXTERN_C int _gl_cxxalias_dummy
@@ -235,10 +245,10 @@
       {                                                                       \
         typedef rettype (*type) parameters;                                   \
                                                                               \
-        inline type rpl () const                                              \
-        { return reinterpret_cast<type>((rettype2 (*) parameters2)(::func)); }\
-                                                                              \
-        inline operator type () const { return rpl (); }                      \
+        inline operator type () const                                         \
+        {                                                                     \
+          return reinterpret_cast<type>((rettype2 (*) parameters2)(::func));  \
+        }                                                                     \
       } func = {};                                                            \
     }                                                                         \
     _GL_EXTERN_C int _gl_cxxalias_dummy
diff --git a/lib/md5.c b/lib/md5.c
index 62d247ed7aa..cec62339e26 100644
--- a/lib/md5.c
+++ b/lib/md5.c
@@ -259,7 +259,7 @@ md5_process_bytes (const void *buffer, size_t len, struct md5_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)
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)
diff --git a/lib/sha256.c b/lib/sha256.c
index 0be8fd2a858..5251e8d950b 100644
--- a/lib/sha256.c
+++ b/lib/sha256.c
@@ -379,7 +379,7 @@ sha256_process_bytes (const void *buffer, size_t len, struct sha256_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)
diff --git a/lib/sha512.c b/lib/sha512.c
index 5494dcbdbad..71a7eca14d7 100644
--- a/lib/sha512.c
+++ b/lib/sha512.c
@@ -387,7 +387,7 @@ sha512_process_bytes (const void *buffer, size_t len, struct sha512_ctx *ctx)
   /* Process available complete blocks.  */
   if (len >= 128)
     {
-#if !_STRING_ARCH_unaligned
+#if !(_STRING_ARCH_unaligned || _STRING_INLINE_unaligned)
 # define UNALIGNED_P(p) ((uintptr_t) (p) % alignof (u64) != 0)
       if (UNALIGNED_P (buffer))
         while (len > 128)