title: What's the status of C++17 support in GCC?
body: <p>Clang has a <a href="http://clang.llvm.org/cxx_status.html">nice page</a> describing the project status w.r.t. C++1z/C++17 feature support (and C++11 and C++14, it's the same page).</p>
  
  <p>g++ has <a href="https://gcc.gnu.org/projects/cxx1y.html">a page regarding C++14 features</a>, but I couldn't find anything about C++17/C++1z. Is that being worked on but just not present on the web? For version 5.0?</p>