Merge from Gnulib

This incorporates:
2017-11-23 stat: work around Solaris bug with tv_nsec < 0
2017-11-12 maint: shorten https://lists.gnu.org/archive/html/... links
* build-aux/config.sub, doc/misc/texinfo.tex, lib/allocator.h:
* lib/fstatat.c, lib/intprops.h, lib/lstat.c, lib/signal.in.h:
* lib/stat-time.h, lib/stdio-impl.h, lib/stdio.in.h:
* lib/timespec.h, m4/alloca.m4, m4/extern-inline.m4:
* m4/faccessat.m4, m4/fstatat.m4, m4/gnulib-common.m4:
* m4/lstat.m4, m4/std-gnu11.m4, m4/sys_types_h.m4:
* m4/vararrays.m4:
Copy from Gnulib.

9 files changed, 35 insertions, 25 deletions

diff --git a/m4/alloca.m4 b/m4/alloca.m4
index d1224316498..867954a2e37 100644
--- a/m4/alloca.m4
+++ b/m4/alloca.m4
@@ -44,7 +44,7 @@ AC_DEFUN([gl_FUNC_ALLOCA],
 AC_DEFUN([gl_PREREQ_ALLOCA], [:])
 
 # This works around a bug in autoconf <= 2.68.
-# See <https://lists.gnu.org/archive/html/bug-gnulib/2011-06/msg00277.html>.
+# See <https://lists.gnu.org/r/bug-gnulib/2011-06/msg00277.html>.
 
 m4_version_prereq([2.69], [] ,[
 
diff --git a/m4/extern-inline.m4 b/m4/extern-inline.m4
index c08af18af68..207aa6a0895 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
-   <https://lists.gnu.org/archive/html/bug-texinfo/2013-02/msg00030.html>.
+   <https://lists.gnu.org/r/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
@@ -28,13 +28,13 @@ AC_DEFUN([gl_EXTERN_INLINE],
    from calling static functions.  This bug is known to occur on:
 
      OS X 10.8 and earlier; see:
-     https://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html
+     https://lists.gnu.org/r/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:
-     https://lists.gnu.org/archive/html/bug-gnulib/2014-07/msg00104.html
+     https://lists.gnu.org/r/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 <https://trac.macports.org/ticket/41033>.
diff --git a/m4/faccessat.m4 b/m4/faccessat.m4
index f4cb49d166c..c64545abd46 100644
--- a/m4/faccessat.m4
+++ b/m4/faccessat.m4
@@ -1,4 +1,4 @@
-# serial 7
+# serial 8
 # See if we need to provide faccessat replacement.
 
 dnl Copyright (C) 2009-2017 Free Software Foundation, Inc.
@@ -11,6 +11,7 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_FACCESSAT],
 [
   AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
 
   dnl Persuade glibc <unistd.h> to declare faccessat().
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
@@ -18,8 +19,11 @@ AC_DEFUN([gl_FUNC_FACCESSAT],
   AC_CHECK_FUNCS_ONCE([faccessat])
   if test $ac_cv_func_faccessat = no; then
     HAVE_FACCESSAT=0
-  elif test "$gl_cv_func_lstat_dereferences_slashed_symlink" != yes; then
-    REPLACE_FACCESSAT=1
+  else
+    case "$gl_cv_func_lstat_dereferences_slashed_symlink" in
+      *yes) ;;
+      *)    REPLACE_FACCESSAT=1 ;;
+    esac
   fi
 ])
 
diff --git a/m4/fstatat.m4 b/m4/fstatat.m4
index b29ec9258e9..767eb83db4b 100644
--- a/m4/fstatat.m4
+++ b/m4/fstatat.m4
@@ -1,4 +1,4 @@
-# fstatat.m4 serial 3
+# fstatat.m4 serial 4
 dnl Copyright (C) 2004-2017 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -13,14 +13,14 @@ AC_DEFUN([gl_FUNC_FSTATAT],
   AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
   AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
-  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+  AC_REQUIRE([AC_CANONICAL_HOST])
   AC_CHECK_FUNCS_ONCE([fstatat])
 
   if test $ac_cv_func_fstatat = no; then
     HAVE_FSTATAT=0
   else
     dnl Test for an AIX 7.1 bug; see
-    dnl <https://lists.gnu.org/archive/html/bug-tar/2011-09/msg00015.html>.
+    dnl <https://lists.gnu.org/r/bug-tar/2011-09/msg00015.html>.
     AC_CACHE_CHECK([whether fstatat (..., 0) works],
       [gl_cv_func_fstatat_zero_flag],
       [AC_RUN_IFELSE(
@@ -46,15 +46,20 @@ AC_DEFUN([gl_FUNC_FSTATAT],
 
     case $gl_cv_func_fstatat_zero_flag+$gl_cv_func_lstat_dereferences_slashed_symlink in
     *yes+*yes) ;;
-    *) REPLACE_FSTATAT=1
-       case $gl_cv_func_fstatat_zero_flag in
-       *yes)
+    *) REPLACE_FSTATAT=1 ;;
+    esac
+
+    case $host_os in
+      solaris*)
+        REPLACE_FSTATAT=1 ;;
+    esac
+
+    case $REPLACE_FSTATAT,$gl_cv_func_fstatat_zero_flag in
+      1,*yes)
          AC_DEFINE([HAVE_WORKING_FSTATAT_ZERO_FLAG], [1],
            [Define to 1 if fstatat (..., 0) works.
             For example, it does not work in AIX 7.1.])
          ;;
-       esac
-       ;;
     esac
   fi
 ])
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
index 36da841287d..bea5a650e76 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
-#   <https://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00367.html>,
+#   <https://lists.gnu.org/r/bug-gnulib/2011-09/msg00367.html>,
 #   but many more packages use AC_PROG_CC_STDC than AC_PROG_CC_C99
-#   <https://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00441.html>.
+#   <https://lists.gnu.org/r/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
-#   <https://lists.gnu.org/archive/html/bug-gnulib/2011-09/msg00431.html>.
+#   <https://lists.gnu.org/r/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/lstat.m4 b/m4/lstat.m4
index 0b6e5d70cba..6ba18cec574 100644
--- a/m4/lstat.m4
+++ b/m4/lstat.m4
@@ -1,4 +1,4 @@
-# serial 29
+# serial 30
 
 # Copyright (C) 1997-2001, 2003-2017 Free Software Foundation, Inc.
 #
@@ -10,14 +10,15 @@ dnl From Jim Meyering.
 
 AC_DEFUN([gl_FUNC_LSTAT],
 [
+  AC_REQUIRE([AC_CANONICAL_HOST])
   AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS])
   dnl If lstat does not exist, the replacement <sys/stat.h> does
   dnl "#define lstat stat", and lstat.c is a no-op.
   AC_CHECK_FUNCS_ONCE([lstat])
   if test $ac_cv_func_lstat = yes; then
     AC_REQUIRE([gl_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK])
-    case "$gl_cv_func_lstat_dereferences_slashed_symlink" in
-      *no)
+    case $host_os,$gl_cv_func_lstat_dereferences_slashed_symlink in
+      solaris* | *no)
         REPLACE_LSTAT=1
         ;;
     esac
diff --git a/m4/std-gnu11.m4 b/m4/std-gnu11.m4
index 3c2f26f4666..c0466beb404 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            https://lists.gnu.org/archive/html/autoconf/2010-12/msg00059.html
+dnl            https://lists.gnu.org/r/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
-# <https://lists.gnu.org/archive/html/autoconf/2012-10/msg00048.html>.
+# <https://lists.gnu.org/r/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 de56d04fc15..75097713d98 100644
--- a/m4/sys_types_h.m4
+++ b/m4/sys_types_h.m4
@@ -35,7 +35,7 @@ AC_DEFUN([gl_SYS_TYPES_H_DEFAULTS],
 ])
 
 # This works around a buggy version in autoconf <= 2.69.
-# See <https://lists.gnu.org/archive/html/autoconf/2016-08/msg00014.html>
+# See <https://lists.gnu.org/r/autoconf/2016-08/msg00014.html>
 
 m4_version_prereq([2.70], [], [
 
diff --git a/m4/vararrays.m4 b/m4/vararrays.m4
index 38a3ed23542..2f678e381eb 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:
-		  https://lists.gnu.org/archive/html/bug-gnulib/2014-08/msg00014.html
+		  https://lists.gnu.org/r/bug-gnulib/2014-08/msg00014.html
 		  */
 	       #ifdef __STDC_NO_VLA__
 		syntax error;