master 48c7caf: Update from Gnulib

[Paul Eggert]

branch: master
commit 48c7caf3aca85f9878ae05bff9a0dca43b8f540b
Author: Paul Eggert <eggert@cs.ucla.edu>
Commit: Paul Eggert <eggert@cs.ucla.edu>

    Update from Gnulib
    
    This incorporates:
    2020-08-13 sys_random: Work around an uClibc bug
    * lib/sys_random.in.h, m4/getrandom.m4, m4/sys_random_h.m4:
    Copy from Gnulib.
---
 lib/sys_random.in.h | 4 ++++
 m4/getrandom.m4     | 5 +++--
 m4/sys_random_h.m4  | 5 +++--
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/lib/sys_random.in.h b/lib/sys_random.in.h
index f14ac1f..a82d716 100644
--- a/lib/sys_random.in.h
+++ b/lib/sys_random.in.h
@@ -23,6 +23,10 @@
 
 #if @HAVE_SYS_RANDOM_H@
 
+/* On uClibc, <sys/random.h> assumes prior inclusion of <stddef.h>.  */
+# if defined __UCLIBC__
+#  include <stddef.h>
+# endif
 /* On Mac OS X 10.5, <sys/random.h> assumes prior inclusion of <sys/types.h>.
    On Max OS X 10.13, <sys/random.h> assumes prior inclusion of a file that
    includes <Availability.h>, such as <stdlib.h> or <unistd.h>.  */
diff --git a/m4/getrandom.m4 b/m4/getrandom.m4
index 424c2fa..d6da71a 100644
--- a/m4/getrandom.m4
+++ b/m4/getrandom.m4
@@ -1,4 +1,4 @@
-# getrandom.m4 serial 7
+# getrandom.m4 serial 8
 dnl Copyright 2020 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -18,7 +18,8 @@ AC_DEFUN([gl_FUNC_GETRANDOM],
       [gl_cv_func_getrandom_ok],
       [AC_COMPILE_IFELSE(
          [AC_LANG_PROGRAM(
-            [[/* Additional includes are needed before <sys/random.h> on Mac 
OS X.  */
+            [[/* Additional includes are needed before <sys/random.h> on uClibc
+                 and Mac OS X.  */
               #include <sys/types.h>
               #include <stdlib.h>
               #include <sys/random.h>
diff --git a/m4/sys_random_h.m4 b/m4/sys_random_h.m4
index a964b15..8c5d537 100644
--- a/m4/sys_random_h.m4
+++ b/m4/sys_random_h.m4
@@ -1,4 +1,4 @@
-# sys_random_h.m4 serial 4
+# sys_random_h.m4 serial 5
 dnl Copyright (C) 2020 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -25,7 +25,8 @@ AC_DEFUN([gl_HEADER_SYS_RANDOM],
   dnl corresponding gnulib module is not in use.
   gl_WARN_ON_USE_PREPARE([[
 #if HAVE_SYS_RANDOM_H
-/* Additional includes are needed before <sys/random.h> on Mac OS X.  */
+/* Additional includes are needed before <sys/random.h> on uClibc
+   and Mac OS X.  */
 # include <sys/types.h>
 # include <stdlib.h>
 # include <sys/random.h>