Update from Gnulib

This incorporates:
2018-06-29 regex: glibc does not use intprops.h
2018-06-28 regex: port to recently proposed glibc regex merge
2018-06-25 Continue to use spaces for indentation, not tabs
2018-06-25 manywarnings: Don't enable -Wjump-misses-init by default
2018-06-25 acl-internal.h: remove _GL_ATTRIBUTE_CONST on void function
2018-06-24 manywarnings: accommodate GCC 9: remove -Wchkp and -Wabi
2018-06-24 maint: clarify comments about sticky EOF
2018-06-24 af_alg: avoid hangs when reading from streams
2018-06-17 crypto: use byteswap
2018-06-17 getloadavg: Return 0 on MS-Windows without Cygwi
2018-06-17 getloadavg: Allow building on MS-Windows without Cygwin
* build-aux/config.guess, build-aux/config.sub, doc/misc/texinfo.tex:
* lib/acl-internal.c, lib/acl-internal.h, lib/get-permissions.c:
* lib/getloadavg.c, lib/gettimeofday.c, lib/md5.c, lib/pselect.c:
* lib/set-permissions.c, lib/sha1.c, lib/sha256.c, lib/sha512.c:
* lib/time.in.h, m4/getloadavg.m4, m4/gnulib-common.m4:
* m4/manywarnings.m4, m4/pthread_sigmask.m4, m4/vararrays.m4:
Copy from Gnulib.

5 files changed, 81 insertions, 84 deletions

diff --git a/m4/getloadavg.m4 b/m4/getloadavg.m4
index d3a8910ecfc..c9f5a6da5df 100644
--- a/m4/getloadavg.m4
+++ b/m4/getloadavg.m4
@@ -108,7 +108,7 @@ AC_DEFUN([gl_PREREQ_GETLOADAVG],
 [
 # Figure out what our getloadavg.c needs.
 
-AC_CHECK_HEADERS_ONCE([sys/param.h])
+AC_CHECK_HEADERS_ONCE([sys/param.h unistd.h])
 
 # On HPUX9, an unprivileged user can get load averages this way.
 if test $gl_func_getloadavg_done = no; then
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
index 736e421016c..5f07855acf1 100644
--- a/m4/gnulib-common.m4
+++ b/m4/gnulib-common.m4
@@ -354,16 +354,16 @@ AC_DEFUN([AC_C_RESTRICT],
    for ac_kw in __restrict __restrict__ _Restrict restrict; do
      AC_COMPILE_IFELSE(
       [AC_LANG_PROGRAM(
-	 [[typedef int *int_ptr;
-	   int foo (int_ptr $ac_kw ip) { return ip[0]; }
-	   int bar (int [$ac_kw]); /* Catch GCC bug 14050.  */
-	   int bar (int ip[$ac_kw]) { return ip[0]; }
-	 ]],
-	 [[int s[1];
-	   int *$ac_kw t = s;
-	   t[0] = 0;
-	   return foo (t) + bar (t);
-	 ]])],
+         [[typedef int *int_ptr;
+           int foo (int_ptr $ac_kw ip) { return ip[0]; }
+           int bar (int [$ac_kw]); /* Catch GCC bug 14050.  */
+           int bar (int ip[$ac_kw]) { return ip[0]; }
+         ]],
+         [[int s[1];
+           int *$ac_kw t = s;
+           t[0] = 0;
+           return foo (t) + bar (t);
+         ]])],
       [ac_cv_c_restrict=$ac_kw])
      test "$ac_cv_c_restrict" != no && break
    done
diff --git a/m4/manywarnings.m4 b/m4/manywarnings.m4
index 60c0e4051cb..925c40e139a 100644
--- a/m4/manywarnings.m4
+++ b/m4/manywarnings.m4
@@ -1,4 +1,4 @@
-# manywarnings.m4 serial 14
+# manywarnings.m4 serial 15
 dnl Copyright (C) 2008-2018 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -108,12 +108,11 @@ m4_defun([gl_MANYWARN_ALL_GCC(C)],
   # comm -3 \
   #  <((sed -n 's/^  *\(-[^ 0-9][^ ]*\) .*/\1/p' manywarnings.m4; \
   #     awk '/^[^#]/ {print $1}' ../build-aux/gcc-warning.spec) | sort) \
-  #  <(gcc --help=warnings | sed -n 's/^  \(-[^ ]*\) .*/\1/p' | sort)
+  #  <(LC_ALL=C gcc --help=warnings | sed -n 's/^  \(-[^ ]*\) .*/\1/p' | sort)
 
   gl_manywarn_set=
   for gl_manywarn_item in -fno-common \
     -W \
-    -Wabi \
     -Waddress \
     -Waggressive-loop-optimizations \
     -Wall \
@@ -128,7 +127,6 @@ m4_defun([gl_MANYWARN_ALL_GCC(C)],
     -Wcast-align=strict \
     -Wcast-function-type \
     -Wchar-subscripts \
-    -Wchkp \
     -Wclobbered \
     -Wcomment \
     -Wcomments \
@@ -176,7 +174,6 @@ m4_defun([gl_MANYWARN_ALL_GCC(C)],
     -Wint-to-pointer-cast \
     -Winvalid-memory-model \
     -Winvalid-pch \
-    -Wjump-misses-init \
     -Wlogical-not-parentheses \
     -Wlogical-op \
     -Wmain \
diff --git a/m4/pthread_sigmask.m4 b/m4/pthread_sigmask.m4
index a33b433c0ef..585b80a40ff 100644
--- a/m4/pthread_sigmask.m4
+++ b/m4/pthread_sigmask.m4
@@ -124,41 +124,41 @@ AC_DEFUN([gl_FUNC_PTHREAD_SIGMASK],
       case " $LIBS " in
         *' -pthread '*) ;;
         *' -lpthread '*) ;;
-	*)
-	  AC_CACHE_CHECK([whether pthread_sigmask works without -lpthread],
-	    [gl_cv_func_pthread_sigmask_in_libc_works],
-	    [
-	      AC_RUN_IFELSE(
-		[AC_LANG_SOURCE([[
-		   #include <pthread.h>
-		   #include <signal.h>
-		   #include <stddef.h>
-		   int main ()
-		   {
-		     sigset_t set;
-		     sigemptyset (&set);
-		     return pthread_sigmask (1729, &set, NULL) != 0;
-		   }]])],
-		[gl_cv_func_pthread_sigmask_in_libc_works=no],
-		[gl_cv_func_pthread_sigmask_in_libc_works=yes],
-		[
-		 changequote(,)dnl
-		 case "$host_os" in
-		   freebsd* | hpux* | solaris | solaris2.[2-9]*)
-		     gl_cv_func_pthread_sigmask_in_libc_works="guessing no";;
-		   *)
-		     gl_cv_func_pthread_sigmask_in_libc_works="guessing yes";;
-		 esac
-		 changequote([,])dnl
-		])
-	    ])
-	  case "$gl_cv_func_pthread_sigmask_in_libc_works" in
-	    *no)
-	      REPLACE_PTHREAD_SIGMASK=1
-	      AC_DEFINE([PTHREAD_SIGMASK_INEFFECTIVE], [1],
-		[Define to 1 if pthread_sigmask may return 0 and have no effect.])
-	      ;;
-	  esac;;
+        *)
+          AC_CACHE_CHECK([whether pthread_sigmask works without -lpthread],
+            [gl_cv_func_pthread_sigmask_in_libc_works],
+            [
+              AC_RUN_IFELSE(
+                [AC_LANG_SOURCE([[
+                   #include <pthread.h>
+                   #include <signal.h>
+                   #include <stddef.h>
+                   int main ()
+                   {
+                     sigset_t set;
+                     sigemptyset (&set);
+                     return pthread_sigmask (1729, &set, NULL) != 0;
+                   }]])],
+                [gl_cv_func_pthread_sigmask_in_libc_works=no],
+                [gl_cv_func_pthread_sigmask_in_libc_works=yes],
+                [
+                 changequote(,)dnl
+                 case "$host_os" in
+                   freebsd* | hpux* | solaris | solaris2.[2-9]*)
+                     gl_cv_func_pthread_sigmask_in_libc_works="guessing no";;
+                   *)
+                     gl_cv_func_pthread_sigmask_in_libc_works="guessing yes";;
+                 esac
+                 changequote([,])dnl
+                ])
+            ])
+          case "$gl_cv_func_pthread_sigmask_in_libc_works" in
+            *no)
+              REPLACE_PTHREAD_SIGMASK=1
+              AC_DEFINE([PTHREAD_SIGMASK_INEFFECTIVE], [1],
+                [Define to 1 if pthread_sigmask may return 0 and have no effect.])
+              ;;
+          esac;;
       esac
     fi
 
diff --git a/m4/vararrays.m4 b/m4/vararrays.m4
index 329eb490c3c..17563b519b0 100644
--- a/m4/vararrays.m4
+++ b/m4/vararrays.m4
@@ -18,44 +18,44 @@ AC_DEFUN([AC_C_VARARRAYS],
     ac_cv_c_vararrays,
     [AC_EGREP_CPP([defined],
        [#ifdef __STDC_NO_VLA__
-	defined
-	#endif
+        defined
+        #endif
        ],
        [ac_cv_c_vararrays='no: __STDC_NO_VLA__ is defined'],
        [AC_COMPILE_IFELSE(
-	  [AC_LANG_PROGRAM(
-	     [[/* 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/r/bug-gnulib/2014-08/msg00014.html
-		  */
-	       #ifdef __STDC_NO_VLA__
-		syntax error;
-	       #else
-		 extern int n;
-		 int B[100];
-		 int fvla (int m, int C[m][m]);
+          [AC_LANG_PROGRAM(
+             [[/* 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/r/bug-gnulib/2014-08/msg00014.html
+                  */
+               #ifdef __STDC_NO_VLA__
+                syntax error;
+               #else
+                 extern int n;
+                 int B[100];
+                 int fvla (int m, int C[m][m]);
 
-		 int
-		 simple (int count, int all[static count])
-		 {
-		   return all[count - 1];
-		 }
+                 int
+                 simple (int count, int all[static count])
+                 {
+                   return all[count - 1];
+                 }
 
-		 int
-		 fvla (int m, int C[m][m])
-		 {
-		   typedef int VLA[m][m];
-		   VLA x;
-		   int D[m];
-		   static int (*q)[m] = &B;
-		   int (*s)[n] = q;
-		   return C && &x[0][0] == &D[0] && &D[0] == s[0];
-		 }
-	       #endif
-	       ]])],
-	  [ac_cv_c_vararrays=yes],
-	  [ac_cv_c_vararrays=no])])])
+                 int
+                 fvla (int m, int C[m][m])
+                 {
+                   typedef int VLA[m][m];
+                   VLA x;
+                   int D[m];
+                   static int (*q)[m] = &B;
+                   int (*s)[n] = q;
+                   return C && &x[0][0] == &D[0] && &D[0] == s[0];
+                 }
+               #endif
+               ]])],
+          [ac_cv_c_vararrays=yes],
+          [ac_cv_c_vararrays=no])])])
   if test "$ac_cv_c_vararrays" = yes; then
     dnl This is for compatibility with Autoconf 2.61-2.69.
     AC_DEFINE([HAVE_C_VARARRAYS], 1,