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-rw-r--r--include/sys/cdefs.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/sys/cdefs.h b/include/sys/cdefs.h
index fb53924e9..8daac15ef 100644
--- a/include/sys/cdefs.h
+++ b/include/sys/cdefs.h
@@ -189,6 +189,14 @@
# define __attribute__(xyz) /* Ignore */
#endif
+/* We make this a no-op unless it can be used as both a variable and
+ a type attribute. gcc 2.8 is known to support both. */
+#if __GNUC_PREREQ (2,8)
+# define __attribute_aligned__(size) __attribute__ ((__aligned__ (size)))
+#else
+# define __attribute_aligned__(size) /* Ignore */
+#endif
+
/* At some point during the gcc 2.96 development the `malloc' attribute
for functions was introduced. We don't want to use it unconditionally
(although this would be possible) since it generates warnings. */