Re: [PATCH] meson: wire up USE_NSEC build knob

[Jeff King <peff@peff.net>]

On Mon, Jul 06, 2026 at 08:43:43AM +0200, Patrick Steinhardt wrote:

> > To summarize: If we're all leaning in the direction of a run-time flag
> > instead, I can noodle in that direction. That certainly involves a bit
> > more surgery than just giving Meson access to the option, but the
> > dynamism may be nice. I'm not too sure how we'd write a test case for
> > it, though.
> 
> I don't think we'd necessarily need a way to detect this. Our current
> build default is to have this disabled, so I'd keep it this way, but
> automatically compile nsec-support into Git if available. And then we
> provide a way for users to opt-in to the new behaviour via the config.

Yeah, agreed. Even if we eventually auto-detect, the first step is
adding the config at all. And then we can decide whether to stop there
or not.

I'm agnostic on whether we add USE_NSEC to meson in the meantime, if it
might eventually be ripped out of the Makefile. We _could_ retain
USE_NSEC to change the unconfigured default for a given build, but I'd
be inclined to just remove it entirely once the runtime config is
available.

-Peff