[libcxx-dev] How to check for a feature-test macro

[Jonathan Wakely via libcxx-dev]

On Mon, 10 Dec 2018 at 19:47, Louis Dionne wrote:
> We should also see how other implementations that use our test suite feel about this (CCing them).

I only use your tests a few times a year, run by hand. If I get a load
of FAILs because I've not implemented something yet and you have,
that's not a problem. I don't expect to get 100% green when I run your
tests.