Update from Gnulib

This incorporates:
2018-11-03 nstrftime: simplify test for mktime failure
2018-11-02 gnulib-common.m4: port _Noreturn to C++
2018-10-22 std-gnu11: Support Autoconf versions < 2.64
2018-10-22 Assume Autoconf >= 2.63
2018-10-16 Remove support for Ultrix
2018-10-16 getloadavg: Remove support for ConvexOS
2018-10-16 getloadavg: Remove support for Sony NEWS
2018-10-16 Remove support for Dynix/ptx
2018-10-16 fsusage: Remove support for AIX 3
2018-10-16 fsusage, stat-size, getloadavg: Remove support for AIX PS/2
2018-10-16 getloadavg: Remove support for HP-UX on m68k
2018-10-16 fsusage, mountlist: Remove support for DolphinOS
2018-10-16 getloadavg: Remove support for Alliant FX/2800
2018-10-16 getloadavg: Remove support for tek4300
2018-10-16 getloadavg: Remove support for Ardent
* build-aux/config.guess, build-aux/config.sub, lib/_Noreturn.h:
* lib/fsusage.c, lib/getgroups.c, lib/getloadavg.c:
* lib/nstrftime.c, lib/time.in.h, m4/errno_h.m4:
* m4/fsusage.m4, m4/getgroups.m4, m4/gnulib-common.m4, m4/longlong.m4:
* m4/std-gnu11.m4, m4/stdint.m4:
Copy from Gnulib.
* lib/gnulib.mk.in, m4/gnulib-comp.m4: Regenerate:

7 files changed, 21 insertions, 164 deletions

diff --git a/lib/_Noreturn.h b/lib/_Noreturn.h
index c44ad89b7c0..94fdfaf0220 100644
--- a/lib/_Noreturn.h
+++ b/lib/_Noreturn.h
@@ -1,8 +1,12 @@
-#if !defined _Noreturn && __STDC_VERSION__ < 201112
-# if (3 <= __GNUC__ || (__GNUC__ == 2 && 8 <= __GNUC_MINOR__) \
-      || 0x5110 <= __SUNPRO_C)
+#ifndef _Noreturn
+# if 201103 <= (defined __cplusplus ? __cplusplus : 0)
+#  define _Noreturn [[noreturn]]
+# elif (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
+        || 4 < __GNUC__ + (7 <= __GNUC_MINOR__))
+   /* _Noreturn works as-is.  */
+# elif 2 < __GNUC__ + (8 <= __GNUC_MINOR__) || 0x5110 <= __SUNPRO_C
 #  define _Noreturn __attribute__ ((__noreturn__))
-# elif 1200 <= _MSC_VER
+# elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0)
 #  define _Noreturn __declspec (noreturn)
 # else
 #  define _Noreturn
diff --git a/lib/fsusage.c b/lib/fsusage.c
index 6920f8530a1..17daf9144a5 100644
--- a/lib/fsusage.c
+++ b/lib/fsusage.c
@@ -46,9 +46,6 @@
 # if HAVE_SYS_STATFS_H
 #  include <sys/statfs.h>
 # endif
-# if HAVE_DUSTAT_H              /* AIX PS/2 */
-#  include <sys/dustat.h>
-# endif
 #endif
 
 /* Many space usage primitives use all 1 bits to denote a value that is
@@ -151,21 +148,6 @@ get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp)
                         ? PROPAGATE_ALL_ONES (fsd.f_frsize)
                         : PROPAGATE_ALL_ONES (fsd.f_bsize));
 
-#elif defined STAT_STATFS2_FS_DATA      /* Ultrix */
-
-  struct fs_data fsd;
-
-  if (statfs (file, &fsd) != 1)
-    return -1;
-
-  fsp->fsu_blocksize = 1024;
-  fsp->fsu_blocks = PROPAGATE_ALL_ONES (fsd.fd_req.btot);
-  fsp->fsu_bfree = PROPAGATE_ALL_ONES (fsd.fd_req.bfree);
-  fsp->fsu_bavail = PROPAGATE_TOP_BIT (fsd.fd_req.bfreen);
-  fsp->fsu_bavail_top_bit_set = EXTRACT_TOP_BIT (fsd.fd_req.bfreen) != 0;
-  fsp->fsu_files = PROPAGATE_ALL_ONES (fsd.fd_req.gtot);
-  fsp->fsu_ffree = PROPAGATE_ALL_ONES (fsd.fd_req.gfree);
-
 #elif defined STAT_STATFS3_OSF1         /* OSF/1 */
 
   struct statfs fsd;
@@ -219,12 +201,7 @@ get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp)
 
   fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_fsize);
 
-#elif defined STAT_STATFS4              /* SVR3, Dynix, old Irix, old AIX, \
-                                           Dolphin */
-
-# if !_AIX && !defined _SEQUENT_ && !defined DOLPHIN
-#  define f_bavail f_bfree
-# endif
+#elif defined STAT_STATFS4              /* SVR3, old Irix */
 
   struct statfs fsd;
 
@@ -234,7 +211,7 @@ get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp)
   /* Empirically, the block counts on most SVR3 and SVR3-derived
      systems seem to always be in terms of 512-byte blocks,
      no matter what value f_bsize has.  */
-# if _AIX || defined _CRAY
+# if defined _CRAY
    fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_bsize);
 # else
    fsp->fsu_blocksize = 512;
@@ -258,30 +235,3 @@ get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp)
   (void) disk;  /* avoid argument-unused warning */
   return 0;
 }
-
-#if defined _AIX && defined _I386
-/* AIX PS/2 does not supply statfs.  */
-
-int
-statfs (char *file, struct statfs *fsb)
-{
-  struct stat stats;
-  struct dustat fsd;
-
-  if (stat (file, &stats) != 0)
-    return -1;
-  if (dustat (stats.st_dev, 0, &fsd, sizeof (fsd)))
-    return -1;
-  fsb->f_type   = 0;
-  fsb->f_bsize  = fsd.du_bsize;
-  fsb->f_blocks = fsd.du_fsize - fsd.du_isize;
-  fsb->f_bfree  = fsd.du_tfree;
-  fsb->f_bavail = fsd.du_tfree;
-  fsb->f_files  = (fsd.du_isize - 2) * fsd.du_inopb;
-  fsb->f_ffree  = fsd.du_tinode;
-  fsb->f_fsid.val[0] = fsd.du_site;
-  fsb->f_fsid.val[1] = fsd.du_pckno;
-  return 0;
-}
-
-#endif /* _AIX && _I386 */
diff --git a/lib/getgroups.c b/lib/getgroups.c
index ec137c158a9..cd6f4d70009 100644
--- a/lib/getgroups.c
+++ b/lib/getgroups.c
@@ -58,8 +58,8 @@ int posix_getgroups (int, gid_t []) __asm ("_getgroups");
 #  define getgroups posix_getgroups
 # endif
 
-/* On at least Ultrix 4.3 and NextStep 3.2, getgroups (0, NULL) always
-   fails.  On other systems, it returns the number of supplemental
+/* On at least NeXTstep 3.2, getgroups (0, NULL) always fails.
+   On other systems, it returns the number of supplemental
    groups for the process.  This function handles that special case
    and lets the system-provided function handle all others.  However,
    it can fail with ENOMEM if memory is tight.  It is unspecified
diff --git a/lib/getloadavg.c b/lib/getloadavg.c
index 578316e34d8..4e7eb0d2338 100644
--- a/lib/getloadavg.c
+++ b/lib/getloadavg.c
@@ -55,16 +55,12 @@
 
    apollo
    BSD                          Real BSD, not just BSD-like.
-   convex
    DGUX
    eunice                       UNIX emulator under VMS.
    hpux
    __MSDOS__                    No-op for MSDOS.
    NeXT
    sgi
-   sequent                      Sequent Dynix 3.x.x (BSD)
-   _SEQUENT_                    Sequent DYNIX/ptx 1.x.x (SYSV)
-   sony_news                    NEWS-OS (works at least for 4.1C)
    UMAX
    UMAX4_3
    VMS
@@ -101,11 +97,6 @@
 #  define WINDOWS32
 # endif
 
-# if !defined (BSD) && defined (ultrix)
-/* Ultrix behaves like BSD on Vaxen.  */
-#  define BSD
-# endif
-
 # ifdef NeXT
 /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which
    conflicts with the definition understood in this file, that this
@@ -145,10 +136,6 @@
 #  define MORE_BSD
 # endif
 
-# if defined (ultrix) && defined (mips)
-#  define decstation
-# endif
-
 # if defined (__SVR4) && !defined (SVR4)
 #  define SVR4
 # endif
@@ -172,13 +159,6 @@
 #  include <sys/table.h>
 # endif
 
-/* UTek's /bin/cc on the 4300 has no architecture specific cpp define by
-   default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>.  Combine
-   that with a couple of other things and we'll have a unique match.  */
-# if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES)
-#  define tek4300                       /* Define by emacs, but not by other users.  */
-# endif
-
 
 /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars.  */
 # ifndef LOAD_AVE_TYPE
@@ -191,14 +171,6 @@
 #   define LOAD_AVE_TYPE long
 #  endif
 
-#  ifdef decstation
-#   define LOAD_AVE_TYPE long
-#  endif
-
-#  ifdef _SEQUENT_
-#   define LOAD_AVE_TYPE long
-#  endif
-
 #  ifdef sgi
 #   define LOAD_AVE_TYPE long
 #  endif
@@ -207,41 +179,14 @@
 #   define LOAD_AVE_TYPE long
 #  endif
 
-#  ifdef sony_news
-#   define LOAD_AVE_TYPE long
-#  endif
-
-#  ifdef sequent
-#   define LOAD_AVE_TYPE long
-#  endif
-
 #  ifdef OSF_ALPHA
 #   define LOAD_AVE_TYPE long
 #  endif
 
-#  if defined (ardent) && defined (titan)
-#   define LOAD_AVE_TYPE long
-#  endif
-
-#  ifdef tek4300
-#   define LOAD_AVE_TYPE long
-#  endif
-
-#  if defined (alliant) && defined (i860) /* Alliant FX/2800 */
-#   define LOAD_AVE_TYPE long
-#  endif
-
 #  if defined _AIX && ! defined HAVE_LIBPERFSTAT
 #   define LOAD_AVE_TYPE long
 #  endif
 
-#  ifdef convex
-#   define LOAD_AVE_TYPE double
-#   ifndef LDAV_CVT
-#    define LDAV_CVT(n) (n)
-#   endif
-#  endif
-
 # endif /* No LOAD_AVE_TYPE.  */
 
 # ifdef OSF_ALPHA
@@ -251,13 +196,6 @@
 #  define FSCALE 1024.0
 # endif
 
-# if defined (alliant) && defined (i860) /* Alliant FX/2800 */
-/* <sys/param.h> defines an incorrect value for FSCALE on an
-   Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu.  */
-#  undef FSCALE
-#  define FSCALE 100.0
-# endif
-
 
 # ifndef FSCALE
 
@@ -267,25 +205,17 @@
 #   define FSCALE 2048.0
 #  endif
 
-#  if defined (MIPS) || defined (SVR4) || defined (decstation)
+#  if defined (MIPS) || defined (SVR4)
 #   define FSCALE 256
 #  endif
 
-#  if defined (sgi) || defined (sequent)
+#  if defined (sgi)
 /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined
    above under #ifdef MIPS.  But we want the sgi value.  */
 #   undef FSCALE
 #   define FSCALE 1000.0
 #  endif
 
-#  if defined (ardent) && defined (titan)
-#   define FSCALE 65536.0
-#  endif
-
-#  ifdef tek4300
-#   define FSCALE 100.0
-#  endif
-
 #  if defined _AIX && !defined HAVE_LIBPERFSTAT
 #   define FSCALE 65536.0
 #  endif
@@ -307,24 +237,16 @@
 # endif
 
 
-# if !defined (KERNEL_FILE) && defined (sequent)
-#  define KERNEL_FILE "/dynix"
-# endif
-
 # if !defined (KERNEL_FILE) && defined (hpux)
 #  define KERNEL_FILE "/hp-ux"
 # endif
 
-# if !defined (KERNEL_FILE) && (defined (_SEQUENT_) || defined (MIPS) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (ardent) && defined (titan)))
+# if !defined (KERNEL_FILE) && (defined (MIPS) || defined (SVR4) || defined (ISC) || defined (sgi))
 #  define KERNEL_FILE "/unix"
 # endif
 
 
-# if !defined (LDAV_SYMBOL) && defined (alliant)
-#  define LDAV_SYMBOL "_Loadavg"
-# endif
-
-# if !defined (LDAV_SYMBOL) && ((defined (hpux) && !defined (hp9000s300)) || defined (_SEQUENT_) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (ardent) && defined (titan)) || (defined (_AIX) && !defined(HAVE_LIBPERFSTAT)))
+# if !defined (LDAV_SYMBOL) && (defined (hpux) || defined (SVR4) || defined (ISC) || defined (sgi) || (defined (_AIX) && !defined(HAVE_LIBPERFSTAT)))
 #  define LDAV_SYMBOL "avenrun"
 # endif
 
@@ -921,7 +843,7 @@ getloadavg (double loadavg[], int nelem)
 
 #   ifndef SUNOS_5
       if (
-#    if !(defined (_AIX) && !defined (ps2))
+#    if !defined (_AIX)
           nlist (KERNEL_FILE, name_list)
 #    else  /* _AIX */
           knlist (name_list, 1, sizeof (name_list[0]))
diff --git a/lib/gnulib.mk.in b/lib/gnulib.mk.in
index 982d3c5c297..c87a15e0197 100644
--- a/lib/gnulib.mk.in
+++ b/lib/gnulib.mk.in
@@ -82,6 +82,7 @@
 #  crypto/sha512-buffer \
 #  d-type \
 #  diffseq \
+#  dosname \
 #  dtoastr \
 #  dtotimespec \
 #  dup2 \
@@ -1403,9 +1404,7 @@ endif
 ## begin gnulib module dosname
 ifeq (,$(OMIT_GNULIB_MODULE_dosname))
 
-ifneq (,$(gl_GNULIB_ENABLED_dosname))
 
-endif
 EXTRA_DIST += dosname.h
 
 endif
diff --git a/lib/nstrftime.c b/lib/nstrftime.c
index 46e806e6049..1dd49c0f782 100644
--- a/lib/nstrftime.c
+++ b/lib/nstrftime.c
@@ -1438,28 +1438,10 @@ __strftime_internal (STREAM_OR_CHAR_T *s, STRFTIME_ARG (size_t maxsize)
 # endif
 
                 ltm = *tp;
+                ltm.tm_wday = -1;
                 lt = mktime_z (tz, &ltm);
-
-                if (lt == (time_t) -1)
-                  {
-                    /* mktime returns -1 for errors, but -1 is also a
-                       valid time_t value.  Check whether an error really
-                       occurred.  */
-                    struct tm tm;
-
-                    if (! localtime_rz (tz, &lt, &tm)
-                        || ((ltm.tm_sec ^ tm.tm_sec)
-                            | (ltm.tm_min ^ tm.tm_min)
-                            | (ltm.tm_hour ^ tm.tm_hour)
-                            | (ltm.tm_mday ^ tm.tm_mday)
-                            | (ltm.tm_mon ^ tm.tm_mon)
-                            | (ltm.tm_year ^ tm.tm_year)))
-                      break;
-                  }
-
-                if (! localtime_rz (0, &lt, &gtm))
+                if (ltm.tm_wday < 0 || ! localtime_rz (0, &lt, &gtm))
                   break;
-
                 diff = tm_diff (&ltm, &gtm);
               }
 #endif
diff --git a/lib/time.in.h b/lib/time.in.h
index cda16c69d2c..3128f44a6f7 100644
--- a/lib/time.in.h
+++ b/lib/time.in.h
@@ -48,7 +48,7 @@
 
 /* The definition of _GL_WARN_ON_USE is copied here.  */
 
-/* Some systems don't define struct timespec (e.g., AIX 4.1, Ultrix 4.3).
+/* Some systems don't define struct timespec (e.g., AIX 4.1).
    Or they define it with the wrong member names or define it in <sys/time.h>
    (e.g., FreeBSD circa 1997).  Stock Mingw prior to 3.0 does not define it,
    but the pthreads-win32 library defines it in <pthread.h>.  */