Update from gnulib

This includes:
2018-02-18 warnings: Add support for Objective C
2018-02-03 stdlib: Fix compilation error on OpenIndiana
* lib/gnulib.mk.in: Regenerate.
* lib/stdlib.in.h, m4/getloadavg.m4, m4/stdlib_h.m4, m4/warnings.m4:
Copy from gnulib.

3 files changed, 18 insertions, 3 deletions

diff --git a/m4/getloadavg.m4 b/m4/getloadavg.m4
index acc266531ed..7b6a09a5c5b 100644
--- a/m4/getloadavg.m4
+++ b/m4/getloadavg.m4
@@ -7,7 +7,7 @@
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
-#serial 6
+#serial 7
 
 # Autoconf defines AC_FUNC_GETLOADAVG, but that is obsolescent.
 # New applications should use gl_GETLOADAVG instead.
@@ -92,6 +92,9 @@ else
 fi
 AC_CHECK_DECL([getloadavg], [], [HAVE_DECL_GETLOADAVG=0],
   [[#if HAVE_SYS_LOADAVG_H
+    /* OpenIndiana has a bug: <sys/time.h> must be included before
+       <sys/loadavg.h>.  */
+    # include <sys/time.h>
     # include <sys/loadavg.h>
     #endif
     #include <stdlib.h>]])
diff --git a/m4/stdlib_h.m4 b/m4/stdlib_h.m4
index eff6f9e685b..49dc5d59cbe 100644
--- a/m4/stdlib_h.m4
+++ b/m4/stdlib_h.m4
@@ -1,4 +1,4 @@
-# stdlib_h.m4 serial 44
+# stdlib_h.m4 serial 45
 dnl Copyright (C) 2007-2018 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -14,6 +14,9 @@ AC_DEFUN([gl_STDLIB_H],
   dnl guaranteed by C89.
   gl_WARN_ON_USE_PREPARE([[#include <stdlib.h>
 #if HAVE_SYS_LOADAVG_H
+/* OpenIndiana has a bug: <sys/time.h> must be included before
+   <sys/loadavg.h>.  */
+# include <sys/time.h>
 # include <sys/loadavg.h>
 #endif
 #if HAVE_RANDOM_H
diff --git a/m4/warnings.m4 b/m4/warnings.m4
index eb1c795c598..07edda1cca6 100644
--- a/m4/warnings.m4
+++ b/m4/warnings.m4
@@ -1,4 +1,4 @@
-# warnings.m4 serial 13
+# warnings.m4 serial 14
 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,
@@ -76,6 +76,15 @@ m4_defun([gl_UNKNOWN_WARNINGS_ARE_ERRORS(C++)],
   AC_LANG_POP([C++])
 ])
 
+# Specialization for _AC_LANG = Objective C. This macro can be AC_REQUIREd.
+# Use of m4_defun rather than AC_DEFUN works around a bug in autoconf < 2.63b.
+m4_defun([gl_UNKNOWN_WARNINGS_ARE_ERRORS(Objective C)],
+[
+  AC_LANG_PUSH([Objective C])
+  gl_UNKNOWN_WARNINGS_ARE_ERRORS_IMPL
+  AC_LANG_POP([Objective C])
+])
+
 AC_DEFUN([gl_UNKNOWN_WARNINGS_ARE_ERRORS_IMPL],
 [gl_COMPILER_OPTION_IF([-Werror -Wunknown-warning-option],
    [gl_unknown_warnings_are_errors='-Wunknown-warning-option -Werror'],