Add CVSID Macro for embedding revision info into the compiled binary. Bug #822

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2032 65c4cc65-6c06-0410-ace0-fbb531ad65f3

include/asterisk/cvsid.h

+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * CVSID Macro for including CVS file Id in source files.
+ * 
+ * Copyright (C) 2004, William Waites
+ *
+ * William Waites <ww@styx.org>
+ *
+ * This program is free software, distributed under the following
+ * terms:
+ *
+ *        1. Any copies of this file must retain this copyright
+ *           notice intact.
+ *        2. A non-exclusive, non-cancellible license is given
+ *           to Digium Inc. (Linux Support Services) in order that
+ *           they may license this file to third parties under terms
+ *           of their choosing on the condition that if they do so
+ *           they must also make this file, or any derivative of
+ *           it, available under terms of the the GNU General Public
+ *           License.
+ *        3. If you have not recieved this file under a proprietary
+ *           license from Digium or one of their licensees, or the
+ *           author, it is distributed to you under terms of the GNU
+ *           General Public License.
+ * 
+ * If you do not have a copy of the GNU GPL, which should be
+ * available in the root directory of this source tree, it can
+ * be found at:
+ *
+ *        http://www.gnu.org/licenses/gpl.html
+ *           
+ */
+
+/*
+ * To use this macro, in the source file put the lines:
+ *
+ * #include <asterisk/cvsid.h>
+ * #ifndef lint
+ * CVSID("$Id$");
+ * #endif /* lint */
+ *
+ * You will then be able to run strings(1) on the resulting
+ * binary and find out what revisions of each source file were
+ * used to build it, since when checked into a CVS repository,
+ * the portion of the string between the dollar signs will be
+ * replaced with version information for the file.
+ */
+
+#ifndef ASTERISK_CVSID_H
+#define ASTERISK_CVSID_H
+
+#ifdef __GNUC__
+#define CVSID(x) static char __cvsid[] __attribute__ ((unused)) = x
+#else
+#define CVSID(x) static char __cvsid[] = x
+#endif
+
+#endif /* ASTERISK_CVSID_H */
+
+