build in C++17 mode by default

* configure.ac: Activate C++17, and replace --enable-c++17 by
--enable-c++20.
* NEWS: Mention the news.
* .gitlab-ci.yml: Use C++20 for the former C++17 builds.
* HACKING, README, doc/org/compile.org, doc/org/concepts.org,
doc/org/index.org, doc/org/install.org, doc/org/tut.org,
doc/org/upgrade2.org, spot/misc/escape.hh: Adjust mentions
of C++14.
This commit is contained in:
Alexandre Duret-Lutz 2020-07-16 12:12:21 +02:00
parent a770727ee8
commit 4f23097619
12 changed files with 79 additions and 62 deletions

View file

@ -1,6 +1,6 @@
# -*- coding: utf-8 -*-
#+TITLE: Code Examples
#+DESCRIPTION: Directory of code examples for using Spot in C++14, Python, and shell.
#+DESCRIPTION: Directory of code examples for using Spot in C++17, Python, and shell.
#+INCLUDE: setup.org
#+HTML_LINK_UP: index.html