This was solved in chat via some hints from Ryan.
In short, I was wrong thinking that GR was using C++20 by default, and had to
set it.
I did in lib/CMakeLists.txt near the target definition:
On Friday, July 8, 2022, 7:09:14 PM EDT, David Cherkus <dcher...@yahoo.com>
wrote:
So, am working with a new C++ OOT I just made under GR 3.10 using gr_modtool.
All the code created by gr_modtool compiled fine.
I added a header file that uses std::popcout and got the compiler error:
error: 'popcount' is not a member of 'std';
So std::popcout is a C++20 feature... Is there something I need to do in the
cmake files to tell it to use C++20? I thought GR 3.10 did use it by default?
How do I check what version the compiler is configured for?
Regards,
Dave
