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diff --git a/gnulib b/gnulib
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-Subproject 4fc10daa05477586fea99b6b3ca02a87d1102fa
diff --git a/gnulib/tests/test-popen.c b/gnulib/tests/test-popen.c
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+/* Test of opening a subcommand stream.
+ Copyright (C) 2009, 2010 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 3 of the License, 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/>. */
+
+/* Written by Eric Blake <ebb9@byu.net>, 2009. */
+
+#include <config.h>
+
+/* Specification. */
+#include <stdio.h>
+
+#include "signature.h"
+SIGNATURE_CHECK (popen, FILE *, (char const *, char const *));
+SIGNATURE_CHECK (pclose, int, (FILE *));
+
+#include "test-popen.h"