Release calc version 2.11.9

have_unused.c

@@ -0,0 +1,89 @@
+/*
+ * have_unused - Determine if we want or can support the unused attribute
+ *
+ * Copyright (C) 2004  Landon Curt Noll
+ *
+ * Calc is open software; you can redistribute it and/or modify it under
+ * the terms of the version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * Calc 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 Lesser General
+ * Public License for more details.
+ *
+ * A copy of version 2.1 of the GNU Lesser General Public License is
+ * distributed with calc under the filename COPYING-LGPL.  You should have
+ * received a copy with calc; if not, write to Free Software Foundation, Inc.
+ * 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * @(#) $Revision: 29.2 $
+ * @(#) $Id: have_unused.c,v 29.2 2004/02/23 08:35:42 chongo Exp $
+ * @(#) $Source: /usr/local/src/cmd/calc/RCS/have_unused.c,v $
+ *
+ * Under source code control:	2004/02/22 22:36:10
+ * File existed as early as:	2004
+ *
+ * chongo <was here> /\oo/\	http://www.isthe.com/chongo/
+ * Share and enjoy!  :-)	http://www.isthe.com/chongo/tech/comp/calc/
+ */
+
+/*
+ * usage:
+ *	have_unused
+ *
+ * Not all compilers support the unused attribute, so this may not compile
+ * on your system.
+ *
+ * This prog outputs several defines:
+ *
+ *	HAVE_UNUSED
+ *		defined ==> ok to use unused
+ *		undefined ==> do not use unused
+ *
+ *	UNUSED
+ *		unused ==> use unused
+ *		(nothing) ==> unused not used
+ */
+
+
+#include <stdio.h>
+
+#if !defined(HAVE_NO_UNUSED)
+
+/* make sure that we can use the __attribute__((unused)) in #define's */
+#undef UNUSED
+#define UNUSED __attribute__((unused))
+
+/*
+ * unused_str - a function with an unused argument
+ */
+static char *
+unused_str(char UNUSED *str)
+{
+    return "__attribute__((unused))";
+}
+
+#endif /* !HAVE_NO_UNUSED */
+
+
+int
+main(void)
+{
+#if defined(HAVE_NO_UNUSED)
+
+	printf("#undef HAVE_UNUSED /* no */\n");
+	printf("#undef UNUSED\n");
+	printf("#define UNUSED /* no */\n");
+
+#else /* HAVE_NO_UNUSED */
+
+	printf("#define HAVE_UNUSED /* yes */\n");
+	printf("#undef UNUSED\n");
+	printf("#define UNUSED %s /* yes */\n", unused_str(NULL));
+
+#endif /* HAVE_NO_UNUSED */
+
+	/* exit(0); */
+	return 0;
+}