What's the best way to minimize the need of run time checks?

[Lawrence D’Oliveiro]

On Saturday, August 13, 2016 at 2:33:55 PM UTC+12, bream... at gmail.com wrote:
>> Surely this application was built using a build system, even back then,
>> that would allow compilation to resume and not rebuild object files that
>> were already built.
> 
> Are you one of those extremely lucky people who worked on projects in which
> the header files never, ever changed?

Or we use languages where imports are considered a build dependency, and “header files” are just a bad dream...