GCC 9.1 Released

Version 9.1 of the GCC compiler suite is out. 'In this release C++17 support is no longer marked experimental. The
C++ front-end implements the full C++17 language (already previous GCC
major version implemented that) and the C++ standard library support is
almost complete. The C++ front-end and library also have numerous further
C++2a draft features. GCC has a new front-end for the D language.
GCC 9.1 has newly partial OpenMP 5.0 support and almost
complete OpenACC 2.5 support.' See this page for an
extensive list of changes.