GCC 6.1 发布，新增功能特性

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                　　GCC 6.1 发布了，该版本较之前GCC5 新怎了大量的功能特性，默认采用C++14为新的标准，替代了之前的C++98。OpenMP 4.5规范将在本版本中被支持。此外，GCC 6.1 增强了对 C++17 的试验性支持；大大改进了诊断特性，包括位置，位置范围，拼写错误标识符建议，选项名字等等改进；新增了修复提示和一些警告提示。改进记录如下：

• 　　UndefinedBehaviorSanitizer gained a new sanitization option,-fsanitize=bounds-strict, which enables strict checkingof array bounds.  In particular, it enables-fsanitize=bounds as well as instrumentation offlexible array member-like arrays.
  
• 　　Type-based alias analysis now disambiguates accesses to differentpointers. This improves precision of the alias oracle by about 20-30%on higher-level C++ programs. Programs doing invalid type punningof pointer types may now need -fno-strict-aliasingto work correctly.
  
• 　　Alias analysis now correctly supports weakref andalias attributes. This makes it possible to accessboth a variable and its alias in one translation unit which is commonwith link-time optimization.
  
• 　　Value range propagation now assumes that the this pointerof C++ member functions is non-null.  This eliminatescommon null pointer checksbut also breaks some non-conforming code-bases (such as Qt-5, Chromium,KDevelop). As a temporary work-around-fno-delete-null-pointer-checks can be used. Wrongcode can be>-fsanitize=undefined.
  

　　完整发布说明，可以在这里查看。