bootstrap: Update requirement to C++11. 2020-05-18 Jason Merrill <jason@redhat.com> 2020-05-18 Jason Merrill <jason@redhat.com> 2020-05-18 Jason Merrill <jason@redhat.com>
c++: Replace "C++2a" with "C++20". 2020-05-13 Jason Merrill <jason@redhat.com> 2020-05-13 Jason Merrill <jason@redhat.com> 2020-05-13 Jason Merrill <jason@redhat.com>