Revert "ld: aarch64: fix TLS relaxation where TCB_SIZE is used"

[deliverable/binutils-gdb.git] / include / ansidecl.h

diff --git a/include/ansidecl.h b/include/ansidecl.h
index 6cbea971aaaa60e72eb5bacd946599dd94ed1245..0c716851e3c3464d5bcc1221d5a660915fc440bf 100644 (file)
--- a/include/ansidecl.h
+++ b/include/ansidecl.h
@@ -1,5 +1,5 @@
 /* ANSI and traditional C compatability macros
-   Copyright (C) 1991-2015 Free Software Foundation, Inc.
+   Copyright (C) 1991-2016 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
 This program is free software; you can redistribute it and/or modify
@@ -274,6 +274,15 @@ So instead we use the macro below and test it against specific values.  */
 # endif /* GNUC >= 4.3 */
 #endif /* ATTRIBUTE_HOT */
 
+/* Attribute 'no_sanitize_undefined' was valid as of gcc 4.9.  */
+#ifndef ATTRIBUTE_NO_SANITIZE_UNDEFINED
+# if (GCC_VERSION >= 4009)
+#  define ATTRIBUTE_NO_SANITIZE_UNDEFINED __attribute__ ((no_sanitize_undefined))
+# else
+#  define ATTRIBUTE_NO_SANITIZE_UNDEFINED
+# endif /* GNUC >= 4.9 */
+#endif /* ATTRIBUTE_NO_SANITIZE_UNDEFINED */
+
 /* We use __extension__ in some places to suppress -pedantic warnings
    about GCC extensions.  This feature didn't work properly before
    gcc 2.8.  */
@@ -304,6 +313,41 @@ So instead we use the macro below and test it against specific values.  */
 #define ENUM_BITFIELD(TYPE) unsigned int
 #endif
 
+/* C++11 adds the ability to add "override" after an implementation of a
+   virtual function in a subclass, to:
+     (A) document that this is an override of a virtual function
+     (B) allow the compiler to issue a warning if it isn't (e.g. a mismatch
+         of the type signature).
+
+   Similarly, it allows us to add a "final" to indicate that no subclass
+   may subsequently override the vfunc.
+
+   Provide OVERRIDE and FINAL as macros, allowing us to get these benefits
+   when compiling with C++11 support, but without requiring C++11.
+
+   For gcc, use "-std=c++11" to enable C++11 support; gcc 6 onwards enables
+   this by default (actually GNU++14).  */
+
+#if __cplusplus >= 201103
+/* C++11 claims to be available: use it.  final/override were only
+   implemented in 4.7, though.  */
+# if GCC_VERSION < 4007
+#  define OVERRIDE
+#  define FINAL
+# else
+#  define OVERRIDE override
+#  define FINAL final
+# endif
+#elif GCC_VERSION >= 4007
+/* G++ 4.7 supports __final in C++98.  */
+# define OVERRIDE
+# define FINAL __final
+#else
+/* No C++11 support; leave the macros empty: */
+# define OVERRIDE
+# define FINAL
+#endif
+
 #ifdef __cplusplus
 }
 #endif