[ccache] clang modules (-fmodules) support

[Joel Rosdahl]

On 24 August 2016 at 22:51, Piotr Wach <wach.piotrek at gmail.com> wrote:
> I have seen that "-fmodules" compiler flag has been recently marked as
> "hard" / unsupported (?)

Yes, "too hard" here means unsupported, which could mean either
impossible to implement or not yet implemented.

> is this because no one had time to implement it or are there real problems
> with supporting it in ccache?

For what it's worth, I haven't tried, and I don't recall hearing
anybody else mention it either. So it would be great if you could have
a look at it!

-- Joel