Re: IS_BUILTIN vs USE_BUILTIN

On Sat, Aug 15, 2026 at 10:45:35PM +0000, David Holland wrote:
 >  > My question is:
 >  > 
 >  >   Is IS_BUILTIN supposed to include "good enough" 
 > 
 > AIUI, generally not, although I'm pretty sure there are cases where
 > some minimal level of "good enough" is required for IS_BUILTIN to
 > register at all.
 > 
 > As wiz's reply indicated, there's a second implicit requirement here,
 > namely to avoid doing expensive checks more than once.
 > 
 >  >   and USE_BUILTIN
 >  >   supposed to include "PREFER machinery says use it"?
 > 
 > Yes.

Would there be any appetite for some sort of print-builtin-info target
that causes all the builtin logic to report what it's doing?

I remember ages back I added permanent debug code for the deps-driven
USE_BUILTIN=yes logic because it kept being needed...

-- 
David A. Holland
[email protected]