gnulib: removed base64 implementation

30 files changed, 150 insertions, 992 deletions

diff --git a/gl/Makefile.am b/gl/Makefile.am
index 9b51325ef4..e67bddfc3e 100644
--- a/gl/Makefile.am
+++ b/gl/Makefile.am
@@ -21,7 +21,7 @@
 # the same distribution terms as the rest of that program.
 #
 # Generated by gnulib-tool.
-# Reproduce by: gnulib-tool --import --dir=. --local-dir=gl/override --lib=libgnu --source-base=gl --m4-base=gl/m4 --doc-base=doc --tests-base=gl/tests --aux-dir=build-aux --with-tests --avoid=alignof-tests --avoid=lock-tests --avoid=lseek-tests --lgpl=2 --no-conditional-dependencies --libtool --macro-prefix=gl --no-vc-files alloca base64 byteswap c-ctype extensions func gendocs getline gettext gettimeofday hash-pjw-bare havelib iconv intprops lib-msvc-compat lib-symbol-versions maintainer-makefile manywarnings memmem-simple minmax netdb netinet_in pmccabe2html read-file snprintf stdint strcase strndup strtok_r strverscmp sys_socket sys_stat time_r unistd valgrind-tests vasprintf vsnprintf warnings
+# Reproduce by: gnulib-tool --import --dir=. --local-dir=gl/override --lib=libgnu --source-base=gl --m4-base=gl/m4 --doc-base=doc --tests-base=gl/tests --aux-dir=build-aux --with-tests --avoid=alignof-tests --avoid=lock-tests --avoid=lseek-tests --lgpl=2 --no-conditional-dependencies --libtool --macro-prefix=gl --no-vc-files alloca byteswap c-ctype extensions func gendocs getline gettext gettimeofday hash-pjw-bare havelib iconv intprops lib-msvc-compat lib-symbol-versions maintainer-makefile manywarnings memmem-simple minmax netdb netinet_in pmccabe2html read-file snprintf stdint strcase strndup strtok_r strverscmp sys_socket sys_stat time_r unistd valgrind-tests vasprintf vsnprintf warnings
 
 AUTOMAKE_OPTIONS = 1.9.6 gnits
 
@@ -97,12 +97,6 @@ EXTRA_DIST += alloca.in.h
 
 ## end   gnulib module alloca-opt
 
-## begin gnulib module base64
-
-libgnu_la_SOURCES += base64.h base64.c
-
-## end   gnulib module base64
-
 ## begin gnulib module byteswap
 
 BUILT_SOURCES += $(BYTESWAP_H)
diff --git a/gl/base64.c b/gl/base64.c
deleted file mode 100644
index 9c5225bd04..0000000000
--- a/gl/base64.c
+++ /dev/null
@@ -1,605 +0,0 @@
-/* base64.c -- Encode binary data using printable characters.
-   Copyright (C) 1999-2001, 2004-2006, 2009-2015 Free Software Foundation, Inc.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU Lesser General Public License as published by
-   the Free Software Foundation; either version 2.1, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with this program; if not, see <http://www.gnu.org/licenses/>.  */
-
-/* Written by Simon Josefsson.  Partially adapted from GNU MailUtils
- * (mailbox/filter_trans.c, as of 2004-11-28).  Improved by review
- * from Paul Eggert, Bruno Haible, and Stepan Kasal.
- *
- * See also RFC 4648 <http://www.ietf.org/rfc/rfc4648.txt>.
- *
- * Be careful with error checking.  Here is how you would typically
- * use these functions:
- *
- * bool ok = base64_decode_alloc (in, inlen, &out, &outlen);
- * if (!ok)
- *   FAIL: input was not valid base64
- * if (out == NULL)
- *   FAIL: memory allocation error
- * OK: data in OUT/OUTLEN
- *
- * size_t outlen = base64_encode_alloc (in, inlen, &out);
- * if (out == NULL && outlen == 0 && inlen != 0)
- *   FAIL: input too long
- * if (out == NULL)
- *   FAIL: memory allocation error
- * OK: data in OUT/OUTLEN.
- *
- */
-
-#include <config.h>
-
-/* Get prototype. */
-#include "base64.h"
-
-/* Get malloc. */
-#include <stdlib.h>
-
-/* Get UCHAR_MAX. */
-#include <limits.h>
-
-#include <string.h>
-
-/* C89 compliant way to cast 'char' to 'unsigned char'. */
-static unsigned char
-to_uchar (char ch)
-{
-  return ch;
-}
-
-static const char b64c[64] =
-  "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
-/* Base64 encode IN array of size INLEN into OUT array. OUT needs
-   to be of length >= BASE64_LENGTH(INLEN), and INLEN needs to be
-   a multiple of 3.  */
-static void
-base64_encode_fast (const char *restrict in, size_t inlen, char *restrict out)
-{
-  while (inlen)
-    {
-      *out++ = b64c[to_uchar (in[0]) >> 2];
-      *out++ = b64c[((to_uchar (in[0]) << 4) + (to_uchar (in[1]) >> 4)) & 0x3f];
-      *out++ = b64c[((to_uchar (in[1]) << 2) + (to_uchar (in[2]) >> 6)) & 0x3f];
-      *out++ = b64c[to_uchar (in[2]) & 0x3f];
-
-      inlen -= 3;
-      in += 3;
-    }
-}
-
-/* Base64 encode IN array of size INLEN into OUT array of size OUTLEN.
-   If OUTLEN is less than BASE64_LENGTH(INLEN), write as many bytes as
-   possible.  If OUTLEN is larger than BASE64_LENGTH(INLEN), also zero
-   terminate the output buffer. */
-void
-base64_encode (const char *restrict in, size_t inlen,
-               char *restrict out, size_t outlen)
-{
-  /* Note this outlen constraint can be enforced at compile time.
-     I.E. that the output buffer is exactly large enough to hold
-     the encoded inlen bytes.  The inlen constraints (of corresponding
-     to outlen, and being a multiple of 3) can change at runtime
-     at the end of input.  However the common case when reading
-     large inputs is to have both constraints satisfied, so we depend
-     on both in base_encode_fast().  */
-  if (outlen % 4 == 0 && inlen == outlen / 4 * 3)
-    {
-      base64_encode_fast (in, inlen, out);
-      return;
-    }
-
-  while (inlen && outlen)
-    {
-      *out++ = b64c[to_uchar (in[0]) >> 2];
-      if (!--outlen)
-        break;
-      *out++ = b64c[((to_uchar (in[0]) << 4)
-                       + (--inlen ? to_uchar (in[1]) >> 4 : 0))
-                      & 0x3f];
-      if (!--outlen)
-        break;
-      *out++ =
-        (inlen
-         ? b64c[((to_uchar (in[1]) << 2)
-                   + (--inlen ? to_uchar (in[2]) >> 6 : 0))
-                  & 0x3f]
-         : '=');
-      if (!--outlen)
-        break;
-      *out++ = inlen ? b64c[to_uchar (in[2]) & 0x3f] : '=';
-      if (!--outlen)
-        break;
-      if (inlen)
-        inlen--;
-      if (inlen)
-        in += 3;
-    }
-
-  if (outlen)
-    *out = '\0';
-}
-
-/* Allocate a buffer and store zero terminated base64 encoded data
-   from array IN of size INLEN, returning BASE64_LENGTH(INLEN), i.e.,
-   the length of the encoded data, excluding the terminating zero.  On
-   return, the OUT variable will hold a pointer to newly allocated
-   memory that must be deallocated by the caller.  If output string
-   length would overflow, 0 is returned and OUT is set to NULL.  If
-   memory allocation failed, OUT is set to NULL, and the return value
-   indicates length of the requested memory block, i.e.,
-   BASE64_LENGTH(inlen) + 1. */
-size_t
-base64_encode_alloc (const char *in, size_t inlen, char **out)
-{
-  size_t outlen = 1 + BASE64_LENGTH (inlen);
-
-  /* Check for overflow in outlen computation.
-   *
-   * If there is no overflow, outlen >= inlen.
-   *
-   * If the operation (inlen + 2) overflows then it yields at most +1, so
-   * outlen is 0.
-   *
-   * If the multiplication overflows, we lose at least half of the
-   * correct value, so the result is < ((inlen + 2) / 3) * 2, which is
-   * less than (inlen + 2) * 0.66667, which is less than inlen as soon as
-   * (inlen > 4).
-   */
-  if (inlen > outlen)
-    {
-      *out = NULL;
-      return 0;
-    }
-
-  *out = malloc (outlen);
-  if (!*out)
-    return outlen;
-
-  base64_encode (in, inlen, *out, outlen);
-
-  return outlen - 1;
-}
-
-/* With this approach this file works independent of the charset used
-   (think EBCDIC).  However, it does assume that the characters in the
-   Base64 alphabet (A-Za-z0-9+/) are encoded in 0..255.  POSIX
-   1003.1-2001 require that char and unsigned char are 8-bit
-   quantities, though, taking care of that problem.  But this may be a
-   potential problem on non-POSIX C99 platforms.
-
-   IBM C V6 for AIX mishandles "#define B64(x) ...'x'...", so use "_"
-   as the formal parameter rather than "x".  */
-#define B64(_)                                  \
-  ((_) == 'A' ? 0                               \
-   : (_) == 'B' ? 1                             \
-   : (_) == 'C' ? 2                             \
-   : (_) == 'D' ? 3                             \
-   : (_) == 'E' ? 4                             \
-   : (_) == 'F' ? 5                             \
-   : (_) == 'G' ? 6                             \
-   : (_) == 'H' ? 7                             \
-   : (_) == 'I' ? 8                             \
-   : (_) == 'J' ? 9                             \
-   : (_) == 'K' ? 10                            \
-   : (_) == 'L' ? 11                            \
-   : (_) == 'M' ? 12                            \
-   : (_) == 'N' ? 13                            \
-   : (_) == 'O' ? 14                            \
-   : (_) == 'P' ? 15                            \
-   : (_) == 'Q' ? 16                            \
-   : (_) == 'R' ? 17                            \
-   : (_) == 'S' ? 18                            \
-   : (_) == 'T' ? 19                            \
-   : (_) == 'U' ? 20                            \
-   : (_) == 'V' ? 21                            \
-   : (_) == 'W' ? 22                            \
-   : (_) == 'X' ? 23                            \
-   : (_) == 'Y' ? 24                            \
-   : (_) == 'Z' ? 25                            \
-   : (_) == 'a' ? 26                            \
-   : (_) == 'b' ? 27                            \
-   : (_) == 'c' ? 28                            \
-   : (_) == 'd' ? 29                            \
-   : (_) == 'e' ? 30                            \
-   : (_) == 'f' ? 31                            \
-   : (_) == 'g' ? 32                            \
-   : (_) == 'h' ? 33                            \
-   : (_) == 'i' ? 34                            \
-   : (_) == 'j' ? 35                            \
-   : (_) == 'k' ? 36                            \
-   : (_) == 'l' ? 37                            \
-   : (_) == 'm' ? 38                            \
-   : (_) == 'n' ? 39                            \
-   : (_) == 'o' ? 40                            \
-   : (_) == 'p' ? 41                            \
-   : (_) == 'q' ? 42                            \
-   : (_) == 'r' ? 43                            \
-   : (_) == 's' ? 44                            \
-   : (_) == 't' ? 45                            \
-   : (_) == 'u' ? 46                            \
-   : (_) == 'v' ? 47                            \
-   : (_) == 'w' ? 48                            \
-   : (_) == 'x' ? 49                            \
-   : (_) == 'y' ? 50                            \
-   : (_) == 'z' ? 51                            \
-   : (_) == '0' ? 52                            \
-   : (_) == '1' ? 53                            \
-   : (_) == '2' ? 54                            \
-   : (_) == '3' ? 55                            \
-   : (_) == '4' ? 56                            \
-   : (_) == '5' ? 57                            \
-   : (_) == '6' ? 58                            \
-   : (_) == '7' ? 59                            \
-   : (_) == '8' ? 60                            \
-   : (_) == '9' ? 61                            \
-   : (_) == '+' ? 62                            \
-   : (_) == '/' ? 63                            \
-   : -1)
-
-static const signed char b64[0x100] = {
-  B64 (0), B64 (1), B64 (2), B64 (3),
-  B64 (4), B64 (5), B64 (6), B64 (7),
-  B64 (8), B64 (9), B64 (10), B64 (11),
-  B64 (12), B64 (13), B64 (14), B64 (15),
-  B64 (16), B64 (17), B64 (18), B64 (19),
-  B64 (20), B64 (21), B64 (22), B64 (23),
-  B64 (24), B64 (25), B64 (26), B64 (27),
-  B64 (28), B64 (29), B64 (30), B64 (31),
-  B64 (32), B64 (33), B64 (34), B64 (35),
-  B64 (36), B64 (37), B64 (38), B64 (39),
-  B64 (40), B64 (41), B64 (42), B64 (43),
-  B64 (44), B64 (45), B64 (46), B64 (47),
-  B64 (48), B64 (49), B64 (50), B64 (51),
-  B64 (52), B64 (53), B64 (54), B64 (55),
-  B64 (56), B64 (57), B64 (58), B64 (59),
-  B64 (60), B64 (61), B64 (62), B64 (63),
-  B64 (64), B64 (65), B64 (66), B64 (67),
-  B64 (68), B64 (69), B64 (70), B64 (71),
-  B64 (72), B64 (73), B64 (74), B64 (75),
-  B64 (76), B64 (77), B64 (78), B64 (79),
-  B64 (80), B64 (81), B64 (82), B64 (83),
-  B64 (84), B64 (85), B64 (86), B64 (87),
-  B64 (88), B64 (89), B64 (90), B64 (91),
-  B64 (92), B64 (93), B64 (94), B64 (95),
-  B64 (96), B64 (97), B64 (98), B64 (99),
-  B64 (100), B64 (101), B64 (102), B64 (103),
-  B64 (104), B64 (105), B64 (106), B64 (107),
-  B64 (108), B64 (109), B64 (110), B64 (111),
-  B64 (112), B64 (113), B64 (114), B64 (115),
-  B64 (116), B64 (117), B64 (118), B64 (119),
-  B64 (120), B64 (121), B64 (122), B64 (123),
-  B64 (124), B64 (125), B64 (126), B64 (127),
-  B64 (128), B64 (129), B64 (130), B64 (131),
-  B64 (132), B64 (133), B64 (134), B64 (135),
-  B64 (136), B64 (137), B64 (138), B64 (139),
-  B64 (140), B64 (141), B64 (142), B64 (143),
-  B64 (144), B64 (145), B64 (146), B64 (147),
-  B64 (148), B64 (149), B64 (150), B64 (151),
-  B64 (152), B64 (153), B64 (154), B64 (155),
-  B64 (156), B64 (157), B64 (158), B64 (159),
-  B64 (160), B64 (161), B64 (162), B64 (163),
-  B64 (164), B64 (165), B64 (166), B64 (167),
-  B64 (168), B64 (169), B64 (170), B64 (171),
-  B64 (172), B64 (173), B64 (174), B64 (175),
-  B64 (176), B64 (177), B64 (178), B64 (179),
-  B64 (180), B64 (181), B64 (182), B64 (183),
-  B64 (184), B64 (185), B64 (186), B64 (187),
-  B64 (188), B64 (189), B64 (190), B64 (191),
-  B64 (192), B64 (193), B64 (194), B64 (195),
-  B64 (196), B64 (197), B64 (198), B64 (199),
-  B64 (200), B64 (201), B64 (202), B64 (203),
-  B64 (204), B64 (205), B64 (206), B64 (207),
-  B64 (208), B64 (209), B64 (210), B64 (211),
-  B64 (212), B64 (213), B64 (214), B64 (215),
-  B64 (216), B64 (217), B64 (218), B64 (219),
-  B64 (220), B64 (221), B64 (222), B64 (223),
-  B64 (224), B64 (225), B64 (226), B64 (227),
-  B64 (228), B64 (229), B64 (230), B64 (231),
-  B64 (232), B64 (233), B64 (234), B64 (235),
-  B64 (236), B64 (237), B64 (238), B64 (239),
-  B64 (240), B64 (241), B64 (242), B64 (243),
-  B64 (244), B64 (245), B64 (246), B64 (247),
-  B64 (248), B64 (249), B64 (250), B64 (251),
-  B64 (252), B64 (253), B64 (254), B64 (255)
-};
-
-#if UCHAR_MAX == 255
-# define uchar_in_range(c) true
-#else
-# define uchar_in_range(c) ((c) <= 255)
-#endif
-
-/* Return true if CH is a character from the Base64 alphabet, and
-   false otherwise.  Note that '=' is padding and not considered to be
-   part of the alphabet.  */
-bool
-isbase64 (char ch)
-{
-  return uchar_in_range (to_uchar (ch)) && 0 <= b64[to_uchar (ch)];
-}
-
-/* Initialize decode-context buffer, CTX.  */
-void
-base64_decode_ctx_init (struct base64_decode_context *ctx)
-{
-  ctx->i = 0;
-}
-
-/* If CTX->i is 0 or 4, there are four or more bytes in [*IN..IN_END), and
-   none of those four is a newline, then return *IN.  Otherwise, copy up to
-   4 - CTX->i non-newline bytes from that range into CTX->buf, starting at
-   index CTX->i and setting CTX->i to reflect the number of bytes copied,
-   and return CTX->buf.  In either case, advance *IN to point to the byte
-   after the last one processed, and set *N_NON_NEWLINE to the number of
-   verified non-newline bytes accessible through the returned pointer.  */
-static char *
-get_4 (struct base64_decode_context *ctx,
-       char const *restrict *in, char const *restrict in_end,
-       size_t *n_non_newline)
-{
-  if (ctx->i == 4)
-    ctx->i = 0;
-
-  if (ctx->i == 0)
-    {
-      char const *t = *in;
-      if (4 <= in_end - *in && memchr (t, '\n', 4) == NULL)
-        {
-          /* This is the common case: no newline.  */
-          *in += 4;
-          *n_non_newline = 4;
-          return (char *) t;
-        }
-    }
-
-  {
-    /* Copy non-newline bytes into BUF.  */
-    char const *p = *in;
-    while (p < in_end)
-      {
-        char c = *p++;
-        if (c != '\n')
-          {
-            ctx->buf[ctx->i++] = c;
-            if (ctx->i == 4)
-              break;
-          }
-      }
-
-    *in = p;
-    *n_non_newline = ctx->i;
-    return ctx->buf;
-  }
-}
-
-#define return_false                            \
-  do                                            \
-    {                                           \
-      *outp = out;                              \
-      return false;                             \
-    }                                           \
-  while (false)
-
-/* Decode up to four bytes of base64-encoded data, IN, of length INLEN
-   into the output buffer, *OUT, of size *OUTLEN bytes.  Return true if
-   decoding is successful, false otherwise.  If *OUTLEN is too small,
-   as many bytes as possible are written to *OUT.  On return, advance
-   *OUT to point to the byte after the last one written, and decrement
-   *OUTLEN to reflect the number of bytes remaining in *OUT.  */
-static bool
-decode_4 (char const *restrict in, size_t inlen,
-          char *restrict *outp, size_t *outleft)
-{
-  char *out = *outp;
-  if (inlen < 2)
-    return false;
-
-  if (!isbase64 (in[0]) || !isbase64 (in[1]))
-    return false;
-
-  if (*outleft)
-    {
-      *out++ = ((b64[to_uchar (in[0])] << 2)
-                | (b64[to_uchar (in[1])] >> 4));
-      --*outleft;
-    }
-
-  if (inlen == 2)
-    return_false;
-
-  if (in[2] == '=')
-    {
-      if (inlen != 4)
-        return_false;
-
-      if (in[3] != '=')
-        return_false;
-    }
-  else
-    {
-      if (!isbase64 (in[2]))
-        return_false;
-
-      if (*outleft)
-        {
-          *out++ = (((b64[to_uchar (in[1])] << 4) & 0xf0)
-                    | (b64[to_uchar (in[2])] >> 2));
-          --*outleft;
-        }
-
-      if (inlen == 3)
-        return_false;
-
-      if (in[3] == '=')
-        {
-          if (inlen != 4)
-            return_false;
-        }
-      else
-        {
-          if (!isbase64 (in[3]))
-            return_false;
-
-          if (*outleft)
-            {
-              *out++ = (((b64[to_uchar (in[2])] << 6) & 0xc0)
-                        | b64[to_uchar (in[3])]);
-              --*outleft;
-            }
-        }
-    }
-
-  *outp = out;
-  return true;
-}
-
-/* Decode base64-encoded input array IN of length INLEN to output array
-   OUT that can hold *OUTLEN bytes.  The input data may be interspersed
-   with newlines.  Return true if decoding was successful, i.e. if the
-   input was valid base64 data, false otherwise.  If *OUTLEN is too
-   small, as many bytes as possible will be written to OUT.  On return,
-   *OUTLEN holds the length of decoded bytes in OUT.  Note that as soon
-   as any non-alphabet, non-newline character is encountered, decoding
-   is stopped and false is returned.  If INLEN is zero, then process
-   only whatever data is stored in CTX.
-
-   Initially, CTX must have been initialized via base64_decode_ctx_init.
-   Subsequent calls to this function must reuse whatever state is recorded
-   in that buffer.  It is necessary for when a quadruple of base64 input
-   bytes spans two input buffers.
-
-   If CTX is NULL then newlines are treated as garbage and the input
-   buffer is processed as a unit.  */
-
-bool
-base64_decode_ctx (struct base64_decode_context *ctx,
-                   const char *restrict in, size_t inlen,
-                   char *restrict out, size_t *outlen)
-{
-  size_t outleft = *outlen;
-  bool ignore_newlines = ctx != NULL;
-  bool flush_ctx = false;
-  unsigned int ctx_i = 0;
-
-  if (ignore_newlines)
-    {
-      ctx_i = ctx->i;
-      flush_ctx = inlen == 0;
-    }
-
-
-  while (true)
-    {
-      size_t outleft_save = outleft;
-      if (ctx_i == 0 && !flush_ctx)
-        {
-          while (true)
-            {
-              /* Save a copy of outleft, in case we need to re-parse this
-                 block of four bytes.  */
-              outleft_save = outleft;
-              if (!decode_4 (in, inlen, &out, &outleft))
-                break;
-
-              in += 4;
-              inlen -= 4;
-            }
-        }
-
-      if (inlen == 0 && !flush_ctx)
-        break;
-
-      /* Handle the common case of 72-byte wrapped lines.
-         This also handles any other multiple-of-4-byte wrapping.  */
-      if (inlen && *in == '\n' && ignore_newlines)
-        {
-          ++in;
-          --inlen;
-          continue;
-        }
-
-      /* Restore OUT and OUTLEFT.  */
-      out -= outleft_save - outleft;
-      outleft = outleft_save;
-
-      {
-        char const *in_end = in + inlen;
-        char const *non_nl;
-
-        if (ignore_newlines)
-          non_nl = get_4 (ctx, &in, in_end, &inlen);
-        else
-          non_nl = in;  /* Might have nl in this case. */
-
-        /* If the input is empty or consists solely of newlines (0 non-newlines),
-           then we're done.  Likewise if there are fewer than 4 bytes when not
-           flushing context and not treating newlines as garbage.  */
-        if (inlen == 0 || (inlen < 4 && !flush_ctx && ignore_newlines))
-          {
-            inlen = 0;
-            break;
-          }
-        if (!decode_4 (non_nl, inlen, &out, &outleft))
-          break;
-
-        inlen = in_end - in;
-      }
-    }
-
-  *outlen -= outleft;
-
-  return inlen == 0;
-}
-
-/* Allocate an output buffer in *OUT, and decode the base64 encoded
-   data stored in IN of size INLEN to the *OUT buffer.  On return, the
-   size of the decoded data is stored in *OUTLEN.  OUTLEN may be NULL,
-   if the caller is not interested in the decoded length.  *OUT may be
-   NULL to indicate an out of memory error, in which case *OUTLEN
-   contains the size of the memory block needed.  The function returns
-   true on successful decoding and memory allocation errors.  (Use the
-   *OUT and *OUTLEN parameters to differentiate between successful
-   decoding and memory error.)  The function returns false if the
-   input was invalid, in which case *OUT is NULL and *OUTLEN is
-   undefined. */
-bool
-base64_decode_alloc_ctx (struct base64_decode_context *ctx,
-                         const char *in, size_t inlen, char **out,
-                         size_t *outlen)
-{
-  /* This may allocate a few bytes too many, depending on input,
-     but it's not worth the extra CPU time to compute the exact size.
-     The exact size is 3 * (inlen + (ctx ? ctx->i : 0)) / 4, minus 1 if the
-     input ends with "=" and minus another 1 if the input ends with "==".
-     Dividing before multiplying avoids the possibility of overflow.  */
-  size_t needlen = 3 * (inlen / 4) + 3;
-
-  *out = malloc (needlen);
-  if (!*out)
-    return true;
-
-  if (!base64_decode_ctx (ctx, in, inlen, *out, &needlen))
-    {
-      free (*out);
-      *out = NULL;
-      return false;
-    }
-
-  if (outlen)
-    *outlen = needlen;
-
-  return true;
-}
diff --git a/gl/base64.h b/gl/base64.h
deleted file mode 100644
index aa409a3ccd..0000000000
--- a/gl/base64.h
+++ /dev/null
@@ -1,68 +0,0 @@
-/* base64.h -- Encode binary data using printable characters.
-   Copyright (C) 2004-2006, 2009-2015 Free Software Foundation, Inc.
-   Written by Simon Josefsson.
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU Lesser General Public License as published by
-   the Free Software Foundation; either version 2.1, or (at your option)
-   any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with this program; if not, see <http://www.gnu.org/licenses/>.  */
-
-#ifndef BASE64_H
-# define BASE64_H
-
-/* Get size_t. */
-# include <stddef.h>
-
-/* Get bool. */
-# include <stdbool.h>
-
-# ifdef __cplusplus
-extern "C" {
-# endif
-
-/* This uses that the expression (n+(k-1))/k means the smallest
-   integer >= n/k, i.e., the ceiling of n/k.  */
-# define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4)
-
-struct base64_decode_context
-{
-  unsigned int i;
-  char buf[4];
-};
-
-extern bool isbase64 (char ch) _GL_ATTRIBUTE_CONST;
-
-extern void base64_encode (const char *restrict in, size_t inlen,
-                           char *restrict out, size_t outlen);
-
-extern size_t base64_encode_alloc (const char *in, size_t inlen, char **out);
-
-extern void base64_decode_ctx_init (struct base64_decode_context *ctx);
-
-extern bool base64_decode_ctx (struct base64_decode_context *ctx,
-                               const char *restrict in, size_t inlen,
-                               char *restrict out, size_t *outlen);
-
-extern bool base64_decode_alloc_ctx (struct base64_decode_context *ctx,
-                                     const char *in, size_t inlen,
-                                     char **out, size_t *outlen);
-
-#define base64_decode(in, inlen, out, outlen) \
-        base64_decode_ctx (NULL, in, inlen, out, outlen)
-
-#define base64_decode_alloc(in, inlen, out, outlen) \
-        base64_decode_alloc_ctx (NULL, in, inlen, out, outlen)
-
-# ifdef __cplusplus
-}
-# endif
-
-#endif /* BASE64_H */
diff --git a/gl/m4/base64.m4 b/gl/m4/base64.m4
deleted file mode 100644
index 1e31236823..0000000000
--- a/gl/m4/base64.m4
+++ /dev/null
@@ -1,15 +0,0 @@
-# base64.m4 serial 4
-dnl Copyright (C) 2004, 2006, 2009-2015 Free Software Foundation, Inc.
-dnl This file is free software; the Free Software Foundation
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-AC_DEFUN([gl_FUNC_BASE64],
-[
-  gl_PREREQ_BASE64
-])
-
-# Prerequisites of lib/base64.c.
-AC_DEFUN([gl_PREREQ_BASE64], [
-  AC_REQUIRE([AC_C_RESTRICT])
-])
diff --git a/gl/m4/codeset.m4 b/gl/m4/codeset.m4
index 1c52ffc1be..d7de8d67e0 100644
--- a/gl/m4/codeset.m4
+++ b/gl/m4/codeset.m4
@@ -1,5 +1,5 @@
 # codeset.m4 serial 5 (gettext-0.18.2)
-dnl Copyright (C) 2000-2002, 2006, 2008-2015 Free Software Foundation, Inc.
+dnl Copyright (C) 2000-2002, 2006, 2008-2014 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/gl/m4/extern-inline.m4 b/gl/m4/extern-inline.m4
index e74339a165..72800650e6 100644
--- a/gl/m4/extern-inline.m4
+++ b/gl/m4/extern-inline.m4
@@ -74,12 +74,13 @@ AC_DEFUN([gl_EXTERN_INLINE],
 # define _GL_EXTERN_INLINE static _GL_UNUSED
 #endif
 
-/* In GCC, suppress bogus "no previous prototype for 'FOO'"
+/* In GCC 4.6 (inclusive) to 5.1 (exclusive),
+   suppress bogus "no previous prototype for 'FOO'"
    and "no previous declaration for 'FOO'" diagnostics,
    when FOO is an inline function in the header; see
    <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113> and
    <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63877>.  */
-#if 4 < __GNUC__ + (6 <= __GNUC_MINOR__)
+#if __GNUC__ == 4 && 6 <= __GNUC_MINOR__
 # if defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__
 #  define _GL_INLINE_HEADER_CONST_PRAGMA
 # else
diff --git a/gl/m4/gettext.m4 b/gl/m4/gettext.m4
index ce5f5ea93a..be247bf7b8 100644
--- a/gl/m4/gettext.m4
+++ b/gl/m4/gettext.m4
@@ -1,5 +1,5 @@
 # gettext.m4 serial 66 (gettext-0.18.2)
-dnl Copyright (C) 1995-2015 Free Software Foundation, Inc.
+dnl Copyright (C) 1995-2014 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/gl/m4/gnulib-cache.m4 b/gl/m4/gnulib-cache.m4
index 2d41057ac8..816405f87c 100644
--- a/gl/m4/gnulib-cache.m4
+++ b/gl/m4/gnulib-cache.m4
@@ -27,13 +27,12 @@
 
 
 # Specification in the form of a command-line invocation:
-#   gnulib-tool --import --dir=. --local-dir=gl/override --lib=libgnu --source-base=gl --m4-base=gl/m4 --doc-base=doc --tests-base=gl/tests --aux-dir=build-aux --with-tests --avoid=alignof-tests --avoid=lock-tests --avoid=lseek-tests --lgpl=2 --no-conditional-dependencies --libtool --macro-prefix=gl --no-vc-files alloca base64 byteswap c-ctype extensions func gendocs getline gettext gettimeofday hash-pjw-bare havelib iconv intprops lib-msvc-compat lib-symbol-versions maintainer-makefile manywarnings memmem-simple minmax netdb netinet_in pmccabe2html read-file snprintf stdint strcase strndup strtok_r strverscmp sys_socket sys_stat time_r unistd valgrind-tests vasprintf vsnprintf warnings
+#   gnulib-tool --import --dir=. --local-dir=gl/override --lib=libgnu --source-base=gl --m4-base=gl/m4 --doc-base=doc --tests-base=gl/tests --aux-dir=build-aux --with-tests --avoid=alignof-tests --avoid=lock-tests --avoid=lseek-tests --lgpl=2 --no-conditional-dependencies --libtool --macro-prefix=gl --no-vc-files alloca byteswap c-ctype extensions func gendocs getline gettext gettimeofday hash-pjw-bare havelib iconv intprops lib-msvc-compat lib-symbol-versions maintainer-makefile manywarnings memmem-simple minmax netdb netinet_in pmccabe2html read-file snprintf stdint strcase strndup strtok_r strverscmp sys_socket sys_stat time_r unistd valgrind-tests vasprintf vsnprintf warnings
 
 # Specification in the form of a few gnulib-tool.m4 macro invocations:
 gl_LOCAL_DIR([gl/override])
 gl_MODULES([
   alloca
-  base64
   byteswap
   c-ctype
   extensions
diff --git a/gl/m4/gnulib-common.m4 b/gl/m4/gnulib-common.m4
index b301abeda0..40e82f6e27 100644
--- a/gl/m4/gnulib-common.m4
+++ b/gl/m4/gnulib-common.m4
@@ -278,12 +278,12 @@ Amsterdam
       dnl but prefer ${host}-ar over ar (useful for cross-compiling).
       AC_CHECK_TOOL([AR], [ar], [ar])
       if test -z "$ARFLAGS"; then
-        ARFLAGS='cru'
+        ARFLAGS='cr'
       fi
     fi
   else
     if test -z "$ARFLAGS"; then
-      ARFLAGS='cru'
+      ARFLAGS='cr'
     fi
   fi
   AC_SUBST([AR])
diff --git a/gl/m4/gnulib-comp.m4 b/gl/m4/gnulib-comp.m4
index 263bce28b5..38a0936145 100644
--- a/gl/m4/gnulib-comp.m4
+++ b/gl/m4/gnulib-comp.m4
@@ -42,8 +42,6 @@ AC_DEFUN([gl_EARLY],
   # Code from module alloca:
   # Code from module alloca-opt:
   # Code from module alloca-opt-tests:
-  # Code from module base64:
-  # Code from module base64-tests:
   # Code from module binary-io:
   # Code from module binary-io-tests:
   # Code from module byteswap:
@@ -207,7 +205,6 @@ LTALLOCA=`echo "$ALLOCA" | sed -e 's/\.[^.]* /.lo /g;s/\.[^.]*$/.lo/'`
 changequote([, ])dnl
 AC_SUBST([LTALLOCA])
   gl_FUNC_ALLOCA
-  gl_FUNC_BASE64
   gl_BYTESWAP
   gl_HEADER_ERRNO_H
   AC_REQUIRE([gl_EXTERN_INLINE])
@@ -577,8 +574,6 @@ AC_DEFUN([gl_FILE_LIST], [
   lib/alloca.in.h
   lib/asnprintf.c
   lib/asprintf.c
-  lib/base64.c
-  lib/base64.h
   lib/byteswap.in.h
   lib/c-ctype.c
   lib/c-ctype.h
@@ -655,7 +650,6 @@ AC_DEFUN([gl_FILE_LIST], [
   m4/00gnulib.m4
   m4/absolute-header.m4
   m4/alloca.m4
-  m4/base64.m4
   m4/byteswap.m4
   m4/codeset.m4
   m4/errno_h.m4
@@ -766,7 +760,6 @@ AC_DEFUN([gl_FILE_LIST], [
   tests/macros.h
   tests/signature.h
   tests/test-alloca-opt.c
-  tests/test-base64.c
   tests/test-binary-io.c
   tests/test-binary-io.sh
   tests/test-byteswap.c
diff --git a/gl/m4/iconv.m4 b/gl/m4/iconv.m4
index 5a6c29bd89..4e37363156 100644
--- a/gl/m4/iconv.m4
+++ b/gl/m4/iconv.m4
@@ -1,5 +1,5 @@
 # iconv.m4 serial 19 (gettext-0.18.2)
-dnl Copyright (C) 2000-2002, 2007-2015 Free Software Foundation, Inc.
+dnl Copyright (C) 2000-2002, 2007-2014 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/gl/m4/intl.m4 b/gl/m4/intl.m4
index 24e7ed9389..70d9a9e561 100644
--- a/gl/m4/intl.m4
+++ b/gl/m4/intl.m4
@@ -1,5 +1,5 @@
-# intl.m4 serial 27 (gettext-0.18.3)
-dnl Copyright (C) 1995-2015 Free Software Foundation, Inc.
+# intl.m4 serial 29 (gettext-0.19)
+dnl Copyright (C) 1995-2014 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -42,6 +42,8 @@ AC_DEFUN([AM_INTL_SUBDIR],
   AC_REQUIRE([gl_XSIZE])dnl
   AC_REQUIRE([gl_FCNTL_O_FLAGS])dnl
   AC_REQUIRE([gt_INTL_MACOSX])dnl
+  AC_REQUIRE([gl_EXTERN_INLINE])dnl
+  AC_REQUIRE([gt_GL_ATTRIBUTE])dnl
 
   dnl Support for automake's --enable-silent-rules.
   case "$enable_silent_rules" in
@@ -230,6 +232,12 @@ AC_DEFUN([gt_INTL_SUBDIR_CORE],
     stpcpy strcasecmp strdup strtoul tsearch uselocale argz_count \
     argz_stringify argz_next __fsetlocking])
 
+  dnl Solaris 12 provides getlocalename_l, while Illumos doesn't have
+  dnl it nor the equivalent.
+  if test $ac_cv_func_uselocale = yes; then
+    AC_CHECK_FUNCS([getlocalename_l])
+  fi
+
   dnl Use the *_unlocked functions only if they are declared.
   dnl (because some of them were defined without being declared in Solaris
   dnl 2.5.1 but were removed in Solaris 2.6, whereas we want binaries built
@@ -240,8 +248,7 @@ AC_DEFUN([gt_INTL_SUBDIR_CORE],
 
   dnl intl/plural.c is generated from intl/plural.y. It requires bison,
   dnl because plural.y uses bison specific features. It requires at least
-  dnl bison-1.26 because earlier versions generate a plural.c that doesn't
-  dnl compile.
+  dnl bison-2.7 for %define api.pure.
   dnl bison is only needed for the maintainer (who touches plural.y). But in
   dnl order to avoid separate Makefiles or --enable-maintainer-mode, we put
   dnl the rule in general Makefile. Now, some people carelessly touch the
@@ -258,7 +265,7 @@ changequote(<<,>>)dnl
     ac_prog_version=`$INTLBISON --version 2>&1 | sed -n 's/^.*GNU Bison.* \([0-9]*\.[0-9.]*\).*$/\1/p'`
     case $ac_prog_version in
       '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
-      1.2[6-9]* | 1.[3-9][0-9]* | [2-9].*)
+      2.[7-9]* | [3-9].*)
 changequote([,])dnl
          ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
       *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
@@ -269,3 +276,29 @@ changequote([,])dnl
     INTLBISON=:
   fi
 ])
+
+dnl Copies _GL_UNUSED and _GL_ATTRIBUTE_PURE definitions from
+dnl gnulib-common.m4 as a fallback, if the project isn't using Gnulib.
+AC_DEFUN([gt_GL_ATTRIBUTE], [
+  m4_ifndef([gl_[]COMMON],
+    AH_VERBATIM([gt_gl_attribute],
+[/* Define as a marker that can be attached to declarations that might not
+    be used.  This helps to reduce warnings, such as from
+    GCC -Wunused-parameter.  */
+#ifndef _GL_UNUSED
+# if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
+#  define _GL_UNUSED __attribute__ ((__unused__))
+# else
+#  define _GL_UNUSED
+# endif
+#endif
+
+/* The __pure__ attribute was added in gcc 2.96.  */
+#ifndef _GL_ATTRIBUTE_PURE
+# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96)
+#  define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+# else
+#  define _GL_ATTRIBUTE_PURE /* empty */
+# endif
+#endif
+]))])
diff --git a/gl/m4/intldir.m4 b/gl/m4/intldir.m4
index 1164148381..73b672a576 100644
--- a/gl/m4/intldir.m4
+++ b/gl/m4/intldir.m4
@@ -1,5 +1,5 @@
 # intldir.m4 serial 2 (gettext-0.18)
-dnl Copyright (C) 2006, 2009-2015 Free Software Foundation, Inc.
+dnl Copyright (C) 2006, 2009-2014 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/gl/m4/intlmacosx.m4 b/gl/m4/intlmacosx.m4
index 0d8d2988c9..8a045f6a29 100644
--- a/gl/m4/intlmacosx.m4
+++ b/gl/m4/intlmacosx.m4
@@ -1,5 +1,5 @@
 # intlmacosx.m4 serial 5 (gettext-0.18.2)
-dnl Copyright (C) 2004-2015 Free Software Foundation, Inc.
+dnl Copyright (C) 2004-2014 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
diff --git a/gl/m4/lcmessage.m4 b/gl/m4/lcmessage.m4
index 2fcce61be8..7470ec5973 100644
--- a/gl/m4/lcmessage.m4
+++ b/gl/m4/lcmessage.m4
@@ -1,5 +1,5 @@
 # lcmessage.m4 serial 7 (gettext-0.18.2)
-dnl Copyright (C) 1995-2002, 2004-2005, 2008-2015 Free Software Foundation,
+dnl Copyright (C) 1995-2002, 2004-2005, 2008-2014 Free Software Foundation,
 dnl Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
diff --git a/gl/m4/manywarnings.m4 b/gl/m4/manywarnings.m4
index 44da98e38d..b4e38d9446 100644
--- a/gl/m4/manywarnings.m4
+++ b/gl/m4/manywarnings.m4
@@ -108,12 +108,13 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     -Waddress \
     -Waggressive-loop-optimizations \
     -Wall \
-    -Warray-bounds \
     -Wattributes \
     -Wbad-function-cast \
+    -Wbool-compare \
     -Wbuiltin-macro-redefined \
     -Wcast-align \
     -Wchar-subscripts \
+    -Wchkp \
     -Wclobbered \
     -Wcomment \
     -Wcomments \
@@ -122,7 +123,10 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     -Wdate-time \
     -Wdeprecated \
     -Wdeprecated-declarations \
+    -Wdesignated-init \
     -Wdisabled-optimization \
+    -Wdiscarded-array-qualifiers \
+    -Wdiscarded-qualifiers \
     -Wdiv-by-zero \
     -Wdouble-promotion \
     -Wempty-body \
@@ -133,6 +137,7 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     -Wformat-extra-args \
     -Wformat-nonliteral \
     -Wformat-security \
+    -Wformat-signedness \
     -Wformat-y2k \
     -Wformat-zero-length \
     -Wfree-nonheap-object \
@@ -140,15 +145,19 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     -Wimplicit \
     -Wimplicit-function-declaration \
     -Wimplicit-int \
+    -Wincompatible-pointer-types \
     -Winit-self \
     -Winline \
+    -Wint-conversion \
     -Wint-to-pointer-cast \
     -Winvalid-memory-model \
     -Winvalid-pch \
     -Wjump-misses-init \
+    -Wlogical-not-parentheses \
     -Wlogical-op \
     -Wmain \
     -Wmaybe-uninitialized \
+    -Wmemset-transposed-args \
     -Wmissing-braces \
     -Wmissing-declarations \
     -Wmissing-field-initializers \
@@ -159,6 +168,7 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     -Wnarrowing \
     -Wnested-externs \
     -Wnonnull \
+    -Wodr \
     -Wold-style-declaration \
     -Wold-style-definition \
     -Wopenmp-simd \
@@ -176,6 +186,9 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     -Wreturn-type \
     -Wsequence-point \
     -Wshadow \
+    -Wshift-count-negative \
+    -Wshift-count-overflow \
+    -Wsizeof-array-argument \
     -Wsizeof-pointer-memaccess \
     -Wstack-protector \
     -Wstrict-aliasing \
@@ -185,7 +198,10 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     -Wsuggest-attribute=format \
     -Wsuggest-attribute=noreturn \
     -Wsuggest-attribute=pure \
+    -Wsuggest-final-methods \
+    -Wsuggest-final-types \
     -Wswitch \
+    -Wswitch-bool \
     -Wswitch-default \
     -Wsync-nand \
     -Wsystem-headers \
@@ -217,8 +233,9 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC],
     gl_manywarn_set="$gl_manywarn_set $gl_manywarn_item"
   done
 
-  # gcc --help=warnings outputs an unusual form for this option; list
-  # it here so that the above 'comm' command doesn't report a false match.
+  # gcc --help=warnings outputs an unusual form for these options; list
+  # them here so that the above 'comm' command doesn't report a false match.
+  gl_manywarn_set="$gl_manywarn_set -Warray-bounds=2"
   gl_manywarn_set="$gl_manywarn_set -Wnormalized=nfc"
 
   # These are needed for older GCC versions.
diff --git a/gl/m4/nls.m4 b/gl/m4/nls.m4
index 33d66c188d..53cdc8be8b 100644
--- a/gl/m4/nls.m4
+++ b/gl/m4/nls.m4
@@ -1,5 +1,5 @@
 # nls.m4 serial 5 (gettext-0.18)
-dnl Copyright (C) 1995-2003, 2005-2006, 2008-2015 Free Software Foundation,
+dnl Copyright (C) 1995-2003, 2005-2006, 2008-2014 Free Software Foundation,
 dnl Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
diff --git a/gl/m4/po.m4 b/gl/m4/po.m4
index 203c3f98b6..43012dca1b 100644
--- a/gl/m4/po.m4
+++ b/gl/m4/po.m4
@@ -1,5 +1,5 @@
-# po.m4 serial 23 (gettext-0.18.3)
-dnl Copyright (C) 1995-2015 Free Software Foundation, Inc.
+# po.m4 serial 24 (gettext-0.19)
+dnl Copyright (C) 1995-2014 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -30,7 +30,7 @@ AC_DEFUN([AM_PO_SUBDIRS],
 
   dnl Release version of the gettext macros. This is used to ensure that
   dnl the gettext macros and po/Makefile.in.in are in sync.
-  AC_SUBST([GETTEXT_MACRO_VERSION], [0.18])
+  AC_SUBST([GETTEXT_MACRO_VERSION], [0.19])
 
   dnl Perform the following tests also if --disable-nls has been given,
   dnl because they are needed for "make dist" to work.
diff --git a/gl/m4/stdio_h.m4 b/gl/m4/stdio_h.m4
index e0c4bde1f8..f60cc2156e 100644
--- a/gl/m4/stdio_h.m4
+++ b/gl/m4/stdio_h.m4
@@ -1,4 +1,4 @@
-# stdio_h.m4 serial 44
+# stdio_h.m4 serial 46
 dnl Copyright (C) 2007-2015 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -15,15 +15,21 @@ AC_DEFUN([gl_STDIO_H],
   dnl Determine whether __USE_MINGW_ANSI_STDIO makes printf and
   dnl inttypes.h behave like gnu instead of system; we must give our
   dnl printf wrapper the right attribute to match.
-  AC_CACHE_CHECK([whether inttypes macros match system or gnu printf],
+  AC_CACHE_CHECK([which flavor of printf attribute matches inttypes macros],
     [gl_cv_func_printf_attribute_flavor],
-    [AC_EGREP_CPP([findme .(ll|j)d. findme],
-      [#define __STDC_FORMAT_MACROS 1
+    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+       #define __STDC_FORMAT_MACROS 1
        #include <stdio.h>
        #include <inttypes.h>
-       findme PRIdMAX findme
-      ], [gl_cv_func_printf_attribute_flavor=gnu],
-      [gl_cv_func_printf_attribute_flavor=system])])
+       /* For non-mingw systems, compilation will trivially succeed.
+          For mingw, compilation will succeed for older mingw (system
+          printf, "I64d") and fail for newer mingw (gnu printf, "lld"). */
+       #if ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__) && \
+         (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 4))
+       extern char PRIdMAX_probe[sizeof PRIdMAX == sizeof "I64d" ? 1 : -1];
+       #endif
+      ]])], [gl_cv_func_printf_attribute_flavor=system],
+      [gl_cv_func_printf_attribute_flavor=gnu])])
   if test "$gl_cv_func_printf_attribute_flavor" = gnu; then
     AC_DEFINE([GNULIB_PRINTF_ATTRIBUTE_FLAVOR_GNU], [1],
       [Define to 1 if printf and friends should be labeled with
diff --git a/gl/m4/valgrind-tests.m4 b/gl/m4/valgrind-tests.m4
index e2168faa53..19601e002c 100644
--- a/gl/m4/valgrind-tests.m4
+++ b/gl/m4/valgrind-tests.m4
@@ -24,7 +24,7 @@ AC_DEFUN([gl_VALGRIND_TESTS],
   OPTS="-q --error-exitcode=1 --leak-check=full --suppressions=suppressions.valgrind"
 
   if test -n "$VALGRIND" \
-     && $VALGRIND $OPTS /bin/true >/dev/null 2>&1; then
+     && $VALGRIND $OPTS $SHELL -c 'exit 0' > /dev/null 2>&1; then
     opt_valgrind_tests=yes
     VALGRIND="$VALGRIND $OPTS"
   else
diff --git a/gl/stddef.in.h b/gl/stddef.in.h
index 86777bd315..5398faf78b 100644
--- a/gl/stddef.in.h
+++ b/gl/stddef.in.h
@@ -83,12 +83,23 @@
 
 /* Some platforms lack max_align_t.  */
 #if !@HAVE_MAX_ALIGN_T@
+/* On the x86, the maximum storage alignment of double, long, etc. is 4,
+   but GCC's C11 ABI for x86 says that max_align_t has an alignment of 8,
+   and the C11 standard allows this.  Work around this problem by
+   using __alignof__ (which returns 8 for double) rather than _Alignof
+   (which returns 4), and align each union member accordingly.  */
+# ifdef __GNUC__
+#  define _GL_STDDEF_ALIGNAS(type) \
+     __attribute__ ((__aligned__ (__alignof__ (type))))
+# else
+#  define _GL_STDDEF_ALIGNAS(type) /* */
+# endif
 typedef union
 {
-  char *__p;
-  double __d;
-  long double __ld;
-  long int __i;
+  char *__p _GL_STDDEF_ALIGNAS (char *);
+  double __d _GL_STDDEF_ALIGNAS (double);
+  long double __ld _GL_STDDEF_ALIGNAS (long double);
+  long int __i _GL_STDDEF_ALIGNAS (long int);
 } max_align_t;
 #endif
 
diff --git a/gl/stdio.in.h b/gl/stdio.in.h
index 7c57a01265..5ba9413269 100644
--- a/gl/stdio.in.h
+++ b/gl/stdio.in.h
@@ -723,11 +723,10 @@ _GL_WARN_ON_USE (getline, "getline is unportable - "
    so any use of gets warrants an unconditional warning; besides, C11
    removed it.  */
 #undef gets
-#if HAVE_RAW_DECL_GETS
+#if HAVE_RAW_DECL_GETS && !defined __cplusplus
 _GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
 #endif
 
-
 #if @GNULIB_OBSTACK_PRINTF@ || @GNULIB_OBSTACK_PRINTF_POSIX@
 struct obstack;
 /* Grow an obstack with formatted output.  Return the number of
diff --git a/gl/string.in.h b/gl/string.in.h
index fefc421890..47e11883ec 100644
--- a/gl/string.in.h
+++ b/gl/string.in.h
@@ -15,16 +15,32 @@
    You should have received a copy of the GNU Lesser General Public License
    along with this program; if not, see <http://www.gnu.org/licenses/>.  */
 
-#ifndef _@GUARD_PREFIX@_STRING_H
-
 #if __GNUC__ >= 3
 @PRAGMA_SYSTEM_HEADER@
 #endif
 @PRAGMA_COLUMNS@
 
+#if defined _GL_ALREADY_INCLUDING_STRING_H
+/* Special invocation convention:
+   - On OS X/NetBSD we have a sequence of nested includes
+       <string.h> -> <strings.h> -> "string.h"
+     In this situation system _chk variants due to -D_FORTIFY_SOURCE
+     might be used after any replacements defined here.  */
+
+#@INCLUDE_NEXT@ @NEXT_STRING_H@
+
+#else
+/* Normal invocation convention.  */
+
+#ifndef _@GUARD_PREFIX@_STRING_H
+
+#define _GL_ALREADY_INCLUDING_STRING_H
+
 /* The include_next requires a split double-inclusion guard.  */
 #@INCLUDE_NEXT@ @NEXT_STRING_H@
 
+#undef _GL_ALREADY_INCLUDING_STRING_H
+
 #ifndef _@GUARD_PREFIX@_STRING_H
 #define _@GUARD_PREFIX@_STRING_H
 
@@ -1027,3 +1043,4 @@ _GL_WARN_ON_USE (strverscmp, "strverscmp is unportable - "
 
 #endif /* _@GUARD_PREFIX@_STRING_H */
 #endif /* _@GUARD_PREFIX@_STRING_H */
+#endif
diff --git a/gl/tests/Makefile.am b/gl/tests/Makefile.am
index 306d637d29..6bcd811d15 100644
--- a/gl/tests/Makefile.am
+++ b/gl/tests/Makefile.am
@@ -67,14 +67,6 @@ EXTRA_DIST += test-alloca-opt.c
 
 ## end   gnulib module alloca-opt-tests
 
-## begin gnulib module base64-tests
-
-TESTS += test-base64
-check_PROGRAMS += test-base64
-EXTRA_DIST += test-base64.c macros.h
-
-## end   gnulib module base64-tests
-
 ## begin gnulib module binary-io
 
 libtests_a_SOURCES += binary-io.h binary-io.c
diff --git a/gl/tests/init.sh b/gl/tests/init.sh
index 9f403c51d2..d36620610e 100644
--- a/gl/tests/init.sh
+++ b/gl/tests/init.sh
@@ -150,6 +150,7 @@ fi
 #  ? - not ok
 gl_shell_test_script_='
 test $(echo y) = y || exit 1
+f_local_() { local v=1; }; f_local_ || exit 1
 score_=10
 if test "$VERBOSE" = yes; then
   test -n "$( (exec 3>&1; set -x; P=1 true 2>&3) 2> /dev/null)" && score_=9
diff --git a/gl/tests/inttypes.in.h b/gl/tests/inttypes.in.h
index 13a72bee90..78846f6968 100644
--- a/gl/tests/inttypes.in.h
+++ b/gl/tests/inttypes.in.h
@@ -51,6 +51,10 @@
 #endif
 /* Get CHAR_BIT.  */
 #include <limits.h>
+/* On mingw, __USE_MINGW_ANSI_STDIO only works if <stdio.h> is also included */
+#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
+# include <stdio.h>
+#endif
 
 #if !(INT_MIN == INT32_MIN && INT_MAX == INT32_MAX)
 # error "This file assumes that 'int' has exactly 32 bits. Please report your platform and compiler to <bug-gnulib@gnu.org>."
diff --git a/gl/tests/test-base64.c b/gl/tests/test-base64.c
deleted file mode 100644
index a02dd7a016..0000000000
--- a/gl/tests/test-base64.c
+++ /dev/null
@@ -1,238 +0,0 @@
-/* Self tests for base64.
-   Copyright (C) 2004, 2008-2015 Free Software Foundation, Inc.
-   Written by Simon Josefsson.
-
-   This program is free software: you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
-
-#include <config.h>
-
-#include "base64.h"
-
-#include <stddef.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdint.h>
-
-#include "macros.h"
-
-int
-main (void)
-{
-  const char *in = "abcdefghijklmnop";
-  const char *b64in = "YWJjZGVmZw==";
-  char out[255];
-  size_t len;
-  bool ok;
-  char *p;
-
-  memset (out, 0x42, sizeof (out));
-  base64_encode (in, 0, out, 0);
-  ASSERT (out[0] == '\x42');
-
-  memset (out, 0x42, sizeof (out));
-  base64_encode (in, 1, out, 1);
-  ASSERT (memcmp (out, "YQ==", 1) == 0);
-
-  memset (out, 0x42, sizeof (out));
-  base64_encode (in, 1, out, 2);
-  ASSERT (memcmp (out, "YQ==", 2) == 0);
-
-  memset (out, 0x42, sizeof (out));
-  base64_encode (in, 1, out, 3);
-  ASSERT (memcmp (out, "YQ==", 3) == 0);
-
-  memset (out, 0x42, sizeof (out));
-  base64_encode (in, 1, out, 4);
-  ASSERT (memcmp (out, "YQ==", 4) == 0);
-
-  memset (out, 0x42, sizeof (out));
-  base64_encode (in, 1, out, 8);
-  ASSERT (memcmp (out, "YQ==", 4) == 0);
-
-  memset (out, 0x42, sizeof (out));
-  base64_encode (in, 2, out, 4);
-  ASSERT (memcmp (out, "YWI=", 4) == 0);
-
-  memset (out, 0x42, sizeof (out));
-  base64_encode (in, 3, out, 4);
-  ASSERT (memcmp (out, "YWJj", 4) == 0);
-
-  memset (out, 0x42, sizeof (out));
-  base64_encode (in, 4, out, 5);
-  ASSERT (memcmp (out, "YWJjZA==", 5) == 0);
-
-  memset (out, 0x42, sizeof (out));
-  base64_encode (in, 4, out, 100);
-  ASSERT (memcmp (out, "YWJjZA==", 6) == 0);
-
-  /* Decode. */
-
-  memset (out, 0x42, sizeof (out));
-  len = 0;
-  ok = base64_decode (b64in, 4, out, &len);
-  ASSERT (ok);
-  ASSERT (len == 0);
-
-  memset (out, 0x42, sizeof (out));
-  len = 1;
-  ok = base64_decode (b64in, 4, out, &len);
-  ASSERT (ok);
-  ASSERT (len == 1);
-  ASSERT (memcmp (out, "abcdefg", 1) == 0);
-
-  memset (out, 0x42, sizeof (out));
-  len = 2;
-  ok = base64_decode (b64in, 4, out, &len);
-  ASSERT (ok);
-  ASSERT (len == 2);
-  ASSERT (memcmp (out, "abcdefg", 2) == 0);
-
-  memset (out, 0x42, sizeof (out));
-  len = 3;
-  ok = base64_decode (b64in, 4, out, &len);
-  ASSERT (ok);
-  ASSERT (len == 3);
-  ASSERT (memcmp (out, "abcdefg", 3) == 0);
-
-  memset (out, 0x42, sizeof (out));
-  len = 4;
-  ok = base64_decode (b64in, 4, out, &len);
-  ASSERT (ok);
-  ASSERT (len == 3);
-  ASSERT (memcmp (out, "abcdefg", 3) == 0);
-
-  memset (out, 0x42, sizeof (out));
-  len = 100;
-  ok = base64_decode (b64in, strlen (b64in), out, &len);
-  ASSERT (ok);
-  ASSERT (len == 7);
-  ASSERT (memcmp (out, "abcdefg", 7) == 0);
-
-  /* Allocating encode */
-
-  len = base64_encode_alloc (in, strlen (in), &p);
-  ASSERT (len == 24);
-  ASSERT (strcmp (p, "YWJjZGVmZ2hpamtsbW5vcA==") == 0);
-  free (p);
-
-  len = base64_encode_alloc (in, SIZE_MAX - 5, &p);
-  ASSERT (len == 0);
-
-  /* Decode context function */
-  {
-    struct base64_decode_context ctx;
-
-    base64_decode_ctx_init (&ctx);
-
-    len = sizeof (out);
-    ok = base64_decode_ctx (&ctx, b64in, strlen (b64in), out, &len);
-    ASSERT (ok);
-    ASSERT (len == 7);
-    ASSERT (memcmp (out, "abcdefg", len) == 0);
-  }
-
-  /* Allocating decode context function */
-
-  ok = base64_decode_alloc_ctx (NULL, b64in, strlen (b64in), &p, &len);
-  ASSERT (ok);
-  ASSERT (len == 7);
-  ASSERT (memcmp (out, "abcdefg", len) == 0);
-  free (p);
-
-  {
-    struct base64_decode_context ctx;
-    const char *newlineb64 = "YWJjZG\nVmZ2hp\namtsbW5vcA==";
-
-    base64_decode_ctx_init (&ctx);
-
-    ok = base64_decode_alloc_ctx (&ctx, newlineb64, strlen (newlineb64), &p, &len);
-    ASSERT (ok);
-    ASSERT (len == strlen (in));
-    ASSERT (memcmp (p, in, len) == 0);
-    free (p);
-  }
-
-  {
-    struct base64_decode_context ctx;
-    base64_decode_ctx_init (&ctx);
-
-    ok = base64_decode_alloc_ctx (&ctx, "YW\nJjZGVmZ2hp", 13, &p, &len);
-    ASSERT (ok);
-    ASSERT (len == 9);
-    ASSERT (memcmp (p, "abcdefghi", len) == 0);
-    free (p);
-
-    base64_decode_ctx_init (&ctx);
-
-    ok = base64_decode_alloc_ctx (&ctx, "YW\n", 3, &p, &len);
-    ASSERT (ok);
-    ASSERT (len == 0);
-    free (p);
-
-    ok = base64_decode_alloc_ctx (&ctx, "JjZGVmZ2", 8, &p, &len);
-    ASSERT (ok);
-    ASSERT (len == 6);
-    ASSERT (memcmp (p, "abcdef", len) == 0);
-    free (p);
-
-    ok = base64_decode_alloc_ctx (&ctx, "hp", 2, &p, &len);
-    ASSERT (ok);
-    ASSERT (len == 3);
-    ASSERT (memcmp (p, "ghi", len) == 0);
-    free (p);
-
-    ok = base64_decode_alloc_ctx (&ctx, "", 0, &p, &len);
-    ASSERT (ok);
-    free (p);
-  }
-
-  {
-    struct base64_decode_context ctx;
-    const char *newlineb64 = "\n\n\n\n\n";
-
-    base64_decode_ctx_init (&ctx);
-
-    ok = base64_decode_alloc_ctx (&ctx, newlineb64, strlen (newlineb64), &p, &len);
-    ASSERT (ok);
-    ASSERT (len == 0);
-    free (p);
-  }
-
-  ok = base64_decode_alloc_ctx (NULL, " ! ", 3, &p, &len);
-  ASSERT (!ok);
-
-  ok = base64_decode_alloc_ctx (NULL, "abc\ndef", 7, &p, &len);
-  ASSERT (!ok);
-
-  ok = base64_decode_alloc_ctx (NULL, "aa", 2, &p, &len);
-  ASSERT (!ok);
-
-  ok = base64_decode_alloc_ctx (NULL, "aa=", 3, &p, &len);
-  ASSERT (!ok);
-
-  ok = base64_decode_alloc_ctx (NULL, "aax", 3, &p, &len);
-  ASSERT (!ok);
-
-  ok = base64_decode_alloc_ctx (NULL, "aa=X", 4, &p, &len);
-  ASSERT (!ok);
-
-  ok = base64_decode_alloc_ctx (NULL, "aa=X", 4, &p, &len);
-  ASSERT (!ok);
-
-  ok = base64_decode_alloc_ctx (NULL, "aax=X", 5, &p, &len);
-  ASSERT (!ok);
-
-  return 0;
-}
diff --git a/gl/tests/test-read-file.c b/gl/tests/test-read-file.c
index cfa52371ab..f8b160f58c 100644
--- a/gl/tests/test-read-file.c
+++ b/gl/tests/test-read-file.c
@@ -57,7 +57,8 @@ main (void)
               /* FILE1 is a regular file or a symlink to a regular file.  */
               if (len != statbuf.st_size)
                 {
-                  fprintf (stderr, "Read %ld from %s...\n", (unsigned long) len, FILE1);
+                  fprintf (stderr, "Read %lu from %s...\n",
+                           (unsigned long) len, FILE1);
                   err = 1;
                 }
             }
@@ -98,7 +99,8 @@ main (void)
              is not a regular file.  */
           if (len != 0)
             {
-              fprintf (stderr, "Read %ld from %s...\n", (unsigned long) len, FILE2);
+              fprintf (stderr, "Read %lu from %s...\n",
+                       (unsigned long) len, FILE2);
               err = 1;
             }
           free (out);
diff --git a/gl/tests/test-stddef.c b/gl/tests/test-stddef.c
index 317949655e..aa6ae549cc 100644
--- a/gl/tests/test-stddef.c
+++ b/gl/tests/test-stddef.c
@@ -55,6 +55,16 @@ verify (alignof (ptrdiff_t) <= alignof (max_align_t));
 verify (alignof (size_t) <= alignof (max_align_t));
 verify (alignof (wchar_t) <= alignof (max_align_t));
 verify (alignof (struct d) <= alignof (max_align_t));
+#if defined __GNUC__ || defined __IBM__ALIGNOF__
+verify (__alignof__ (double) <= __alignof__ (max_align_t));
+verify (__alignof__ (int) <= __alignof__ (max_align_t));
+verify (__alignof__ (long double) <= __alignof__ (max_align_t));
+verify (__alignof__ (long int) <= __alignof__ (max_align_t));
+verify (__alignof__ (ptrdiff_t) <= __alignof__ (max_align_t));
+verify (__alignof__ (size_t) <= __alignof__ (max_align_t));
+verify (__alignof__ (wchar_t) <= __alignof__ (max_align_t));
+verify (__alignof__ (struct d) <= __alignof__ (max_align_t));
+#endif
 
 int
 main (void)
diff --git a/gl/wchar.in.h b/gl/wchar.in.h
index d65a7aff6b..ae31e8d804 100644
--- a/gl/wchar.in.h
+++ b/gl/wchar.in.h
@@ -30,9 +30,14 @@
 #endif
 @PRAGMA_COLUMNS@
 
-#if defined __need_mbstate_t || defined __need_wint_t || (defined __hpux && ((defined _INTTYPES_INCLUDED && !defined strtoimax) || defined _GL_JUST_INCLUDE_SYSTEM_WCHAR_H)) || defined _GL_ALREADY_INCLUDING_WCHAR_H
+#if (((defined __need_mbstate_t || defined __need_wint_t)               \
+      && !defined __MINGW32__)                                          \
+     || (defined __hpux                                                 \
+         && ((defined _INTTYPES_INCLUDED && !defined strtoimax)         \
+             || defined _GL_JUST_INCLUDE_SYSTEM_WCHAR_H))               \
+     || defined _GL_ALREADY_INCLUDING_WCHAR_H)
 /* Special invocation convention:
-   - Inside glibc and uClibc header files.
+   - Inside glibc and uClibc header files, but not MinGW.
    - On HP-UX 11.00 we have a sequence of nested includes
      <wchar.h> -> <stdlib.h> -> <stdint.h>, and the latter includes <wchar.h>,
      once indirectly <stdint.h> -> <sys/types.h> -> <inttypes.h> -> <wchar.h>