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diff --git a/t/subst.sh b/t/subst.sh
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+++ b/t/subst.sh
@@ -0,0 +1,39 @@
+#! /bin/sh
+# Copyright (C) 1996-2012 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Test that AC_SUBST($1) does something sensible.  From Ulrich
+# Drepper.
+
+. ./defs || Exit 1
+
+cat >> configure.ac << 'END'
+dnl This test used to have the following lines, which cannot have
+dnl worked sensibly with Autoconf for years, however:
+dnl AC_SUBST($1)
+dnl AC_SUBST([$]$1)  dnl this is the actual invocation that was used
+dnl
+AC_DEFUN([FOO],
+[AC_SUBST([$1])])
+FOO([BAR])
+END
+
+: > Makefile.am
+
+$ACLOCAL
+$AUTOMAKE
+grep '^\$1' Makefile.in && Exit 1
+
+: