Merge from Gnulib

This incorporates:
2017-09-16 manywarnings: port to GCC on 64-bit MS-Windows
2017-09-13 all: Replace many more http URLs by https URLs
* build-aux/config.guess, build-aux/config.sub:
* build-aux/gitlog-to-changelog, doc/misc/texinfo.tex:
* lib/allocator.h, lib/count-leading-zeros.h:
* lib/count-trailing-zeros.h, lib/dup2.c, lib/filevercmp.c:
* lib/fstatat.c, lib/fsync.c, lib/ftoastr.c, lib/ftoastr.h:
* lib/intprops.h, lib/signal.in.h, lib/stdio-impl.h, lib/stdio.in.h:
* lib/unistd.in.h, lib/utimens.c, m4/alloca.m4, m4/extern-inline.m4:
* m4/fstatat.m4, m4/gnulib-common.m4, m4/manywarnings.m4:
* m4/std-gnu11.m4, m4/sys_types_h.m4, m4/vararrays.m4:
Copy from Gnulib.
* lib/gnulib.mk.in: Regenerate.

8 files changed, 25 insertions, 20 deletions

diff --git a/m4/alloca.m4 b/m4/alloca.m4
index 7f0604cbdac..d1224316498 100644
--- a/m4/alloca.m4
+++ b/m4/alloca.m4
@@ -44,12 +44,12 @@ AC_DEFUN([gl_FUNC_ALLOCA],
 AC_DEFUN([gl_PREREQ_ALLOCA], [:])
 
 # This works around a bug in autoconf <= 2.68.
-# See <http://lists.gnu.org/archive/html/bug-gnulib/2011-06/msg00277.html>.
+# See <https://lists.gnu.org/archive/html/bug-gnulib/2011-06/msg00277.html>.
 
 m4_version_prereq([2.69], [] ,[
 
 # This is taken from the following Autoconf patch:
-# http://git.savannah.gnu.org/cgit/autoconf.git/commit/?id=6cd9f12520b0d6f76d3230d7565feba1ecf29497
+# https://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=6cd9f12520b0d6f76d3230d7565feba1ecf29497
 
 # _AC_LIBOBJ_ALLOCA
 # -----------------
diff --git a/m4/extern-inline.m4 b/m4/extern-inline.m4
index 00f960968b0..c08af18af68 100644
--- a/m4/extern-inline.m4
+++ b/m4/extern-inline.m4
@@ -11,7 +11,7 @@ AC_DEFUN([gl_EXTERN_INLINE],
 [/* Please see the Gnulib manual for how to use these macros.
 
    Suppress extern inline with HP-UX cc, as it appears to be broken; see
-   <http://lists.gnu.org/archive/html/bug-texinfo/2013-02/msg00030.html>.
+   <https://lists.gnu.org/archive/html/bug-texinfo/2013-02/msg00030.html>.
 
    Suppress extern inline with Sun C in standards-conformance mode, as it
    mishandles inline functions that call each other.  E.g., for 'inline void f
@@ -28,16 +28,16 @@ AC_DEFUN([gl_EXTERN_INLINE],
    from calling static functions.  This bug is known to occur on:
 
      OS X 10.8 and earlier; see:
-     http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html
+     https://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html
 
      DragonFly; see
      http://muscles.dragonflybsd.org/bulk/bleeding-edge-potential/latest-per-pkg/ah-tty-0.3.12.log
 
      FreeBSD; see:
-     http://lists.gnu.org/archive/html/bug-gnulib/2014-07/msg00104.html
+     https://lists.gnu.org/archive/html/bug-gnulib/2014-07/msg00104.html
 
    OS X 10.9 has a macro __header_inline indicating the bug is fixed for C and
-   for clang but remains for g++; see <http://trac.macports.org/ticket/41033>.
+   for clang but remains for g++; see <https://trac.macports.org/ticket/41033>.
    Assume DragonFly and FreeBSD will be similar.  */
 #if (((defined __APPLE__ && defined __MACH__) \
       || defined __DragonFly__ || defined __FreeBSD__) \
diff --git a/m4/fstatat.m4 b/m4/fstatat.m4
index 75cf0110401..b29ec9258e9 100644
--- a/m4/fstatat.m4
+++ b/m4/fstatat.m4
@@ -20,7 +20,7 @@ AC_DEFUN([gl_FUNC_FSTATAT],
     HAVE_FSTATAT=0
   else
     dnl Test for an AIX 7.1 bug; see
-    dnl <http://lists.gnu.org/archive/html/bug-tar/2011-09/msg00015.html>.
+    dnl <https://lists.gnu.org/archive/html/bug-tar/2011-09/msg00015.html>.
     AC_CACHE_CHECK([whether fstatat (..., 0) works],
       [gl_cv_func_fstatat_zero_flag],
       [AC_RUN_IFELSE(
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
index 36f2acc5539..36da841287d 100644
--- a/m4/gnulib-common.m4
+++ b/m4/gnulib-common.m4
@@ -228,13 +228,13 @@ m4_ifndef([AS_VAR_IF],
 # This is like AC_PROG_CC_C99, except that
 # - AC_PROG_CC_C99 did not exist in Autoconf versions < 2.60,
 # - AC_PROG_CC_C99 does not mix well with AC_PROG_CC_STDC
-#   <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00367.html>,
+#   <https://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00367.html>,
 #   but many more packages use AC_PROG_CC_STDC than AC_PROG_CC_C99
-#   <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00441.html>.
+#   <https://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00441.html>.
 # Remaining problems:
 # - When AC_PROG_CC_STDC is invoked twice, it adds the C99 enabling options
 #   to CC twice
-#   <http://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00431.html>.
+#   <https://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00431.html>.
 # - AC_PROG_CC_STDC is likely to change now that C11 is an ISO standard.
 AC_DEFUN([gl_PROG_CC_C99],
 [
diff --git a/m4/manywarnings.m4 b/m4/manywarnings.m4
index eb89325519c..d10bcd08a0e 100644
--- a/m4/manywarnings.m4
+++ b/m4/manywarnings.m4
@@ -1,4 +1,4 @@
-# manywarnings.m4 serial 12
+# manywarnings.m4 serial 13
 dnl Copyright (C) 2008-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -267,18 +267,23 @@ m4_defun([gl_MANYWARN_ALL_GCC(C)],
 
   # 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.
-  # Would prefer "min (PTRDIFF_MAX, SIZE_MAX)", but it must be a literal
-  # and AC_COMPUTE_INT requires it to fit in a long:
+  # Would prefer "min (PTRDIFF_MAX, SIZE_MAX)", but it must be a literal.
+  # Also, AC_COMPUTE_INT requires it to fit in a long; it is 2**63 on
+  # the only platforms where it does not fit in a long, so make that
+  # a special case.
   AC_MSG_CHECKING([max safe object size])
   AC_COMPUTE_INT([gl_alloc_max],
-    [(LONG_MAX < PTRDIFF_MAX ? LONG_MAX : PTRDIFF_MAX) < (size_t) -1
-     ? (LONG_MAX < PTRDIFF_MAX ? LONG_MAX : PTRDIFF_MAX)
-     : (size_t) -1],
+    [LONG_MAX < (PTRDIFF_MAX < (size_t) -1 ? PTRDIFF_MAX : (size_t) -1)
+     ? -1
+     : PTRDIFF_MAX < (size_t) -1 ? (long) PTRDIFF_MAX : (long) (size_t) -1],
     [[#include <limits.h>
       #include <stddef.h>
       #include <stdint.h>
     ]],
     [gl_alloc_max=2147483647])
+  case $gl_alloc_max in
+    -1) gl_alloc_max=9223372036854775807;;
+  esac
   AC_MSG_RESULT([$gl_alloc_max])
   gl_manywarn_set="$gl_manywarn_set -Walloc-size-larger-than=$gl_alloc_max"
   gl_manywarn_set="$gl_manywarn_set -Warray-bounds=2"
diff --git a/m4/std-gnu11.m4 b/m4/std-gnu11.m4
index bd34aa1a268..3c2f26f4666 100644
--- a/m4/std-gnu11.m4
+++ b/m4/std-gnu11.m4
@@ -369,7 +369,7 @@ dnl		just the module.  Instead, define the (private) symbol
 dnl             _STDC_C99, which suppresses a bogus failure in <stdbool.h>.
 dnl             The resulting compiler passes the test case here, and that's
 dnl             good enough.  For more, please see the thread starting at:
-dnl            http://lists.gnu.org/archive/html/autoconf/2010-12/msg00059.html
+dnl            https://lists.gnu.org/archive/html/autoconf/2010-12/msg00059.html
 dnl Tru64       -c99
 dnl with extended modes being tried first.
 [[-std=gnu99 -std=c99 -c99 -AC99 -D_STDC_C99= -qlanglvl=extc1x -qlanglvl=extc99]], [$1], [$2])[]dnl
@@ -458,7 +458,7 @@ dnl preferably extc11.
 # --------------
 # Do not use AU_ALIAS here and in AC_PROG_CC_C99 and AC_PROG_CC_STDC,
 # as that'd be incompatible with how Automake redefines AC_PROG_CC.  See
-# <http://lists.gnu.org/archive/html/autoconf/2012-10/msg00048.html>.
+# <https://lists.gnu.org/archive/html/autoconf/2012-10/msg00048.html>.
 AU_DEFUN([AC_PROG_CC_C89],
   [AC_REQUIRE([AC_PROG_CC])],
   [$0 is obsolete; use AC_PROG_CC]
diff --git a/m4/sys_types_h.m4 b/m4/sys_types_h.m4
index 34224d7705d..06268cfb2db 100644
--- a/m4/sys_types_h.m4
+++ b/m4/sys_types_h.m4
@@ -40,7 +40,7 @@ AC_DEFUN([gl_SYS_TYPES_H_DEFAULTS],
 m4_version_prereq([2.70], [], [
 
 # This is taken from the following Autoconf patch:
-# https://git.sv.gnu.org/cgit/autoconf.git/commit/?id=e17a30e98
+# http://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=commitdiff;h=e17a30e987d7ee695fb4294a82d987ec3dc9b974
 
 m4_undefine([AC_HEADER_MAJOR])
 AC_DEFUN([AC_HEADER_MAJOR],
diff --git a/m4/vararrays.m4 b/m4/vararrays.m4
index 8391121ad3f..38a3ed23542 100644
--- a/m4/vararrays.m4
+++ b/m4/vararrays.m4
@@ -27,7 +27,7 @@ AC_DEFUN([AC_C_VARARRAYS],
              [[/* Test for VLA support.  This test is partly inspired
                   from examples in the C standard.  Use at least two VLA
                   functions to detect the GCC 3.4.3 bug described in:
-                  http://lists.gnu.org/archive/html/bug-gnulib/2014-08/msg00014.html
+                  https://lists.gnu.org/archive/html/bug-gnulib/2014-08/msg00014.html
                   */
                #ifdef __STDC_NO_VLA__
                 syntax error;