1 files changed, 7 insertions, 5 deletions

diff --git a/gl/m4/realloc.m4 b/gl/m4/realloc.m4
index d22138f..eb90d58 100644
--- a/gl/m4/realloc.m4
+++ b/gl/m4/realloc.m4
@@ -1,5 +1,6 @@
-# realloc.m4 serial 26
-dnl Copyright (C) 2007, 2009-2023 Free Software Foundation, Inc.
+# realloc.m4
+# serial 29
+dnl Copyright (C) 2007, 2009-2024 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.
@@ -16,7 +17,8 @@ AC_DEFUN([_AC_FUNC_REALLOC_IF],
           [[#include <stdlib.h>
           ]],
           [[void *p = realloc (0, 0);
-            int result = !p;
+            void * volatile vp = p;
+            int result = !vp;
             free (p);
             return result;]])
        ],
@@ -25,8 +27,8 @@ AC_DEFUN([_AC_FUNC_REALLOC_IF],
        [case "$host_os" in
           # Guess yes on platforms where we know the result.
           *-gnu* | freebsd* | netbsd* | openbsd* | bitrig* \
-          | gnu* | *-musl* | midnightbsd* \
-          | hpux* | solaris* | cygwin* | mingw* | msys* )
+          | gnu* | *-musl* | midipix* | midnightbsd* \
+          | hpux* | solaris* | cygwin* | mingw* | windows* | msys* )
             ac_cv_func_realloc_0_nonnull="guessing yes" ;;
           # If we don't know, obey --enable-cross-guesses.
           *) ac_cv_func_realloc_0_nonnull="$gl_cross_guess_normal" ;;