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-rw-r--r--m4/sig_atomic_t.m414
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diff --git a/m4/sig_atomic_t.m4 b/m4/sig_atomic_t.m4
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+# sig_atomic_t.m4 serial 3
+dnl Copyright (C) 2003, 2009-2022 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.
+
+AC_DEFUN([gt_TYPE_SIG_ATOMIC_T],
+[
+ AC_CHECK_TYPES([sig_atomic_t], ,
+ [AC_DEFINE([sig_atomic_t], [int],
+ [Define as an integer type suitable for memory locations that can be
+ accessed atomically even in the presence of asynchronous signals.])],
+ [#include <signal.h>])
+])