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diff --git a/contrib/cvs/src/error.h b/contrib/cvs/src/error.h
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+/* error.h -- declaration for error-reporting function
+ Copyright (C) 1995 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, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#ifndef _error_h_
+#define _error_h_
+
+#ifndef __attribute__
+/* This feature is available in gcc versions 2.5 and later. */
+# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__
+# define __attribute__(Spec) /* empty */
+# endif
+/* The __-protected variants of `format' and `printf' attributes
+ are accepted by gcc versions 2.6.4 (effectively 2.7) and later. */
+# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
+# define __format__ format
+# define __printf__ printf
+# endif
+#endif
+
+#if __STDC__
+void error (int, int, const char *, ...) \
+ __attribute__ ((__format__ (__printf__, 3, 4)));
+#else
+void error ();
+#endif
+
+/* If non-zero, error will use the CVS protocol to report error
+ messages. This will only be set in the CVS server parent process;
+ most other code is run via do_cvs_command, which forks off a child
+ process and packages up its stderr in the protocol. */
+extern int error_use_protocol;
+
+#endif /* _error_h_ */