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-rw-r--r--misc/sys/cdefs.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/misc/sys/cdefs.h b/misc/sys/cdefs.h
index 72dbfde9cf..18143058fa 100644
--- a/misc/sys/cdefs.h
+++ b/misc/sys/cdefs.h
@@ -196,6 +196,13 @@
# define __attribute_noinline__ /* Ignore */
#endif
+/* gcc allows marking deprecated functions. */
+#if __GNUC_PREREQ (3,2)
+# define __attribute_deprecated__ __attribute__ ((__deprecated__))
+#else
+# define __attribute_deprecated__ /* Ignore */
+#endif
+
/* At some point during the gcc 2.8 development the `format_arg' attribute
for functions was introduced. We don't want to use it unconditionally
(although this would be possible) since it generates warnings.