--- embedaddon/libiconv/srcm4/read.m4	2012/05/29 09:29:44	1.1.1.1
+++ embedaddon/libiconv/srcm4/read.m4	2021/03/17 13:38:46	1.1.1.2
@@ -1,5 +1,5 @@
-# read.m4 serial 2
-dnl Copyright (C) 2011 Free Software Foundation, Inc.
+# read.m4 serial 5
+dnl Copyright (C) 2011-2019 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -7,6 +7,12 @@ dnl with or without modifications, as long as this not
 AC_DEFUN([gl_FUNC_READ],
 [
   AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  m4_ifdef([gl_MSVC_INVAL], [
+    AC_REQUIRE([gl_MSVC_INVAL])
+    if test $HAVE_MSVC_INVALID_PARAMETER_HANDLER = 1; then
+      REPLACE_READ=1
+    fi
+  ])
   dnl This ifdef is just an optimization, to avoid performing a configure
   dnl check whose result is not used. It does not make the test of
   dnl GNULIB_UNISTD_H_NONBLOCKING or GNULIB_NONBLOCKING redundant.
@@ -17,3 +23,6 @@ AC_DEFUN([gl_FUNC_READ],
     fi
   ])
 ])
+
+# Prerequisites of lib/read.c.
+AC_DEFUN([gl_PREREQ_READ], [:])