C11 compatibility
Note: IBM supports selected features of
C11, known as C1X before its ratification. IBM will continue to develop and
implement the features of this standard. The implementation of the
language level is based on IBM's interpretation of the standard. Until
IBM's implementation of all the C11 features is complete, including
the support of a new C11 standard library, the implementation may
change from release to release. IBM makes no attempt to maintain compatibility,
in source, binary, or listings and other compiler interfaces, with
earlier releases of IBM's implementation of the C11 features.
The following features are part of a continual phased release process leading towards full compliance with C11. They can be enabled by the -qlanglvl=extc1x group option when you compile with the C compiler. Certain C11 features are also available when you compile with the C++ compiler. For further information, see sections that describe individual features.
| Language feature | Discussed in: |
|---|---|
| _Noreturn function specifier | The _Noreturn function specifier, Keywords for language extensions (IBM extension) |
| Anonymous structures | Anonymous structures |
| Anonymous unions | Anonymous unions |
| Complex type initializations | Initialization of complex types (C11) |
| Generic selection | Generic selection (C11) |
| Static assertions | _Static_assert declaration |
| typedef redeclarations | typedef definitions |
Related reference
-qlanglvl in the XL C/C++ Compiler Reference
