Differences in support for the new C + + standard for several major releases of GCC

Pure self-use summary, without any technical content, the conclusion is, basically no difference ....   Systems currently in use: ubuntu14.04ltsg++  (ubuntu 4.8.4-2ubuntu1~14.04.1) for the Debian department and CentOS7  4.8.4  Latest 16.04ltsg++  (UBUNTU&NBSP;5.3.1-10UBUNTU2)  5.3.1 20160225 ------------------------------ ---------------------View the version of the Redhat series: Cat/etc/redhat-releasecentos Linux release 7.1.1503 (Core)   Company use centOS6.3 : g++ (GCC) 4.4.7 20120313 (Red Hat 4.4.7-16) is too old to move out of ING, not to watch.    uses centOS7.1: g++ (GCC) 4.8.5 20150623 (Red Hat 4.8.5-4) The main production platform used in the next few years   --------------------- --------------------------------g++ Support--std=c++11 (c++1x = c++11,1y=14,1z=17)  14.04 4.8.4cent7 4.8.5 starting from 4.8       4.8.0 thread_local            [[Noreturn]] void f (); property syntax             Alignas (double) int i; Alignment specifier            inheriting constructors:          &N Bsp     struct A {a (int);};                struct B:A {using a::a;}; Defines b::b (int)                 b b (42); ok       4.8.1 decltype ref-qualifiers           & nbsp;      4.9   ISO C11: _atomic <stdatomic.h> _generic _thread_local __auto_type  & nbsp         c++1y  : decltype (auto)                   &NB Sp   [[deprecated]]                      Lambda capture Initializ ers                           [x = 42]{...};                       Digit separators        & nbsp             generic (polymorphic) lambdas.            libstdc++:std::make_unique 16.04 5.3.1 ISO c11:default mode for C is NOW-STD=GNU11 instead of -std=gnu89            c++14  : variable templates          &N Bsp           Extended constexpr g++5 most important:A New Implementation of std::string is enabled by default, using the small string optimization instead of Copy-on-writ e reference counting.A New Implementation of Std::list is enabled by default, with a O (1) size () function;Unbelievable list insists not to cache size until version 5.0 .....  Full support for c++11, including the following new features: std::d eque and Std::vector<bool> meet the Allocator-aware container requirements;movable and swappable iostream classes;Support for std::align and std::aligned_union;type Traits std::is_trivially_copyable, std::is_trivially_constructible, std::is_trivially_assignable etc.;I/o manipulators std::p ut_time, Std::get_time, Std::hexfloat and std::d efaultfloat;generic locale-aware Std::isblank;locale facets for Unicode conversion;atomic operations for Std::shared_ptr;std::notify_all_at_thread_exit () and functions for making futures ready at thread exit.

Differences in support for the new C + + standard for several major releases of GCC