Extensions to the C++ Language#
The GNU compiler provides these extensions to the C++ language (and you
can also use most of the C language extensions in your C++ programs). If you
want to write code that checks whether these features are available, you can
test for the GNU compiler the same way as for C programs: check for a
predefined macro __GNUC__
. You can also use __GNUG__
to
test specifically for GNU C++ (see Common Predefined Macros).
- Vague Linkage
- Function Multiversioning
- Type Traits
- C++ Concepts
- Deprecated Features
- Backwards Compatibility
- When is a Volatile C++ Object Accessed?
- Restricting Pointer Aliasing
- C++ Interface and Implementation Pragmas
- Where’s the Template?
- Extracting the Function Pointer from a Bound Pointer to Member Function
- C++-Specific Variable, Function, and Type Attributes