gcc와 c++ feature

GCC 에서 지원하는 C++11 피쳐들을 알아보자.

gcc 4.9 에서는 c++11 피쳐가 지원된다는 것은 알고 있을겁니다.

그런데, gcc 4.6에서도  c++11 이 지원된다고 아셨다면, 아래 표를 참조해서 내가 쓸수 있는 피쳐와 그렇지 못한 피쳐를 확인해야 합니다.

gcc 4.6 부터 c++11 피쳐들이 100% 지원되는 것이 아니기 때문이죠.

대표적으로 유용한 override keyword 는 4.7 부터 지원하고 있죠.

<참고  : https://gcc.gnu.org/projects/cxx-status.html#cxx11>

Language Feature	Proposal	Available in GCC?	SD-6 Feature Test
Rvalue references	N2118	GCC 4.3	__cpp_rvalue_references >= 200610
Rvalue references for *this	N2439	GCC 4.8.1	__cpp_ref_qualifiers >= 200710
Initialization of class objects by rvalues	N1610	Yes
Non-static data member initializers	N2756	GCC 4.7	__cpp_nsdmi >= 200809
Variadic templates	N2242	GCC 4.3	__cpp_variadic_templates >= 200704
Extending variadic template template parameters	N2555	GCC 4.4
Initializer lists	N2672	GCC 4.4	__cpp_initializer_lists >= 200806
Static assertions	N1720	GCC 4.3	__cpp_static_assert >= 200410
auto-typed variables	N1984	GCC 4.4
Multi-declarator auto	N1737	GCC 4.4
Removal of auto as a storage-class specifier	N2546	GCC 4.4
New function declarator syntax	N2541	GCC 4.4
New wording for C++0x lambdas	N2927	GCC 4.5	__cpp_lambdas >= 200907
Declared type of an expression	N2343	GCC 4.3	__cpp_decltype >= 200707
decltype and call expressions	N3276	GCC 4.8.1
Right angle brackets	N1757	GCC 4.3
Default template arguments for function templates	DR226	GCC 4.3
Solving the SFINAE problem for expressions	DR339	GCC 4.4
Template aliases	N2258	GCC 4.7	__cpp_alias_templates >= 200704
Extern templates	N1987	Yes
Null pointer constant	N2431	GCC 4.6
Strongly-typed enums	N2347	GCC 4.4
Forward declarations for enums	N2764	GCC 4.6
Generalized attributes	N2761	GCC 4.8	__cpp_attributes >= 200809; __has_cpp_attribute(noreturn) >= 200809; __has_cpp_attribute(carries_dependency) == 0 (not implemented)
Generalized constant expressions	N2235	GCC 4.6	__cpp_constexpr >= 200704
Alignment support	N2341	GCC 4.8
Delegating constructors	N1986	GCC 4.7	__cpp_delegating_constructors >= 200604
Inheriting constructors	N2540	GCC 4.8	__cpp_inheriting_constructors >= 200802
Explicit conversion operators	N2437	GCC 4.5
New character types	N2249	GCC 4.4	__cpp_unicode_characters >= 200704
Unicode string literals	N2442	GCC 4.5	__cpp_unicode_literals >= 200710
Raw string literals	N2442	GCC 4.5	__cpp_raw_strings >= 200710
Universal character name literals	N2170	GCC 4.5
User-defined literals	N2765	GCC 4.7	__cpp_user_defined_literals >= 200809
Standard Layout Types	N2342	GCC 4.5
Defaulted and deleted functions	N2346	GCC 4.4
Extended friend declarations	N1791	GCC 4.7
Extending sizeof	N2253	GCC 4.4
Inline namespaces	N2535	GCC 4.4
Unrestricted unions	N2544	GCC 4.6
Local and unnamed types as template arguments	N2657	GCC 4.5
Range-based for	N2930	GCC 4.6	__cpp_range_based_for >= 200907
Explicit virtual overrides	N2928  N3206  N3272	GCC 4.7
Minimal support for garbage collection and reachability-based leak detection	N2670	No
Allowing move constructors to throw [noexcept]	N3050	GCC 4.6
Defining move special member functions	N3053	GCC 4.6
Concurrency
Sequence points	N2239	Yes
Atomic operations	N2427	GCC 4.4
Strong Compare and Exchange	N2748	GCC 4.5
Bidirectional Fences	N2752	GCC 4.8
Memory model	N2429	GCC 4.8
Data-dependency ordering: atomics and memory model	N2664	GCC 4.4 (memory_order_consume)
Propagating exceptions	N2179	GCC 4.4
Abandoning a process and at_quick_exit	N2440	GCC 4.8
Allow atomics use in signal handlers	N2547	Yes
Thread-local storage	N2659	GCC 4.8
Dynamic initialization and destruction with concurrency	N2660	GCC 4.3
C99 Features in C++11
__func__ predefined identifier	N2340	GCC 4.3
C99 preprocessor	N1653	GCC 4.3
long long	N1811	GCC 4.3
Extended integral types	N1988	Yes

C++14 지원은 아래와 버전들에서 지원되고 있습니다.

Language Feature	Proposal	Available in GCC?	SD-6 Feature Test
Tweak to certain C++ contextual conversions	N3323	4.9
Binary literals	N3472	4.3 (GNU)  4.9 (N3472)	__cpp_binary_literals >= 201304
Return type deduction for normal functions	N3638	4.8 (N3386)  4.9 (N3638)	__cpp_decltype_auto >= 201304
Generalized lambda capture (init-capture)	N3648	4.5 (partial)  4.9 (N3648)	__cpp_init_captures >= 201304
Generic (polymorphic) lambda expressions	N3649	4.9	__cpp_generic_lambdas >= 201304
Variable templates	N3651	5	__cpp_variable_templates >= 201304
Relaxing requirements on constexpr functions	N3652	5	__cpp_constexpr >= 201304
Member initializers and aggregates	N3653	5	__cpp_aggregate_nsdmi >= 201304
Clarifying memory allocation	N3664	N/A
Sized deallocation	N3778	5	__cpp_sized_deallocation >= 201309
[[deprecated]] attribute	N3760	4.9 (N3797)	__has_cpp_attribute(deprecated) >= 201309
Single-quotation-mark as a digit separator	N3781	4.9 (N3797)	__cpp_digit_separator >= 201309