1 files changed, 17 insertions, 15 deletions

diff --git a/include/fortify-headers.h b/include/fortify-headers.h
index a173466..4fbc808 100644
--- a/include/fortify-headers.h
+++ b/include/fortify-headers.h
@@ -17,9 +17,21 @@
 #ifndef _FORTIFY_HEADERS_H
 #define _FORTIFY_HEADERS_H
 
+#ifdef __has_attribute
+# define __fortify_has_attribute(v) __has_attribute(v)
+#else
+# define __fortify_has_attribute(v) 0
+#endif
+
+#ifdef __has_builtin
+# define __fortify_has_builtin(v) __has_builtin(v)
+#else
+# define __fortify_has_builtin(v) 0
+#endif
+
 #ifdef __clang__
 
-#if _FORTIFY_SOURCE > 2 && defined __has_attribute && __has_attribute(pass_dynamic_object_size)
+#if _FORTIFY_SOURCE > 2 && __fortify_has_attribute(pass_dynamic_object_size)
 #define _FORTIFY_POSN(n) const __attribute__((pass_dynamic_object_size(n)))
 #else
 /* clang uses overloads; see https://github.com/llvm/llvm-project/issues/53516 */
@@ -53,38 +65,28 @@
 #define _FORTIFY_FN(fn) _FORTIFY_FNB(fn); _FORTIFY_INLINE
 
 
-#if _FORTIFY_SOURCE > 2 && defined __has_builtin && __has_builtin (__builtin_dynamic_object_size)
+#if _FORTIFY_SOURCE > 2 && __fortify_has_builtin(__builtin_dynamic_object_size)
 #define __bos(ptr, type) __builtin_dynamic_object_size (ptr, type)
 #else
 #define __bos(ptr, type) __builtin_object_size (ptr, type)
 #endif
 
-#if defined __has_attribute
-
-#if __has_attribute (access)
+#if __fortify_has_attribute(access)
 #define __fortify_access(...) __attribute__ ((access (__VA_ARGS__)))
 #else
 #define __fortify_access(...)
 #endif
 
-#if __has_attribute (format)
+#if __fortify_has_attribute(format)
 #define __fortify__format(...) __attribute__ ((format (__VA_ARGS__)))
 #else
 #define __fortify__format(...)
 #endif
 
-#if __has_attribute (__diagnose_if)
+#if __fortify_has_attribute(__diagnose_if)
 #define __fortify_warning_if(cond, msg) __attribute__ ((__diagnose_if (cond, msg, "warning")))
 #else
 #define __fortify_warning_if(cond, msg)
 #endif
 
-#else /* ! __has_attribute */
-
-#define __fortify_access(...)
-#define __fortify__format(...)
-#define __fortify_warning_if(cond, msg)
-
-#endif
-
 #endif