/* PSPP - a program for statistical analysis.
- Copyright (C) 2006, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2006, 2009, 2010, 2016 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
#define PURE_FUNCTION
#endif
+/* This attribute indicates that the argument with the given
+ IDX must be a null pointer. IDX counts backward in the
+ argument list, so that 0 is the last argument, 1 is the
+ second-from-last argument, and so on. */
+#if __GNUC__ > 3
+#define SENTINEL(IDX) ATTRIBUTE ((sentinel(IDX)))
+#else
+#define SENTINEL(IDX)
+#endif
+
+
+/* This attribute indicates that the function should be compiled
+ with the specified LEVEL, regardless of what has been specified
+ on the command line */
+#if __GNUC__ > 3
+#define OPTIMIZE(LEVEL) ATTRIBUTE ((optimize(LEVEL)))
+#else
+#define OPTIMIZE(LEVEL)
+#endif
+
+
#endif /* compiler.h */