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-rw-r--r--m4/tzset.m418
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diff --git a/m4/tzset.m4 b/m4/tzset.m4
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+# serial 15
+
+# Copyright (C) 2003, 2007, 2009-2021 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Written by Paul Eggert and Jim Meyering.
+
+AC_DEFUN([gl_FUNC_TZSET],
+[
+ AC_REQUIRE([gl_HEADER_TIME_H_DEFAULTS])
+ AC_REQUIRE([AC_CANONICAL_HOST])
+ REPLACE_TZSET=0
+ case "$host_os" in
+ mingw*) REPLACE_TZSET=1 ;;
+ esac
+])