[CMake] dependencies on system include files

[Simon Richter]

Hi Kris,

On 17.12.18 01:24, Kris Thielemans wrote:

> Checking a bit more carefully it appears that the system .h files are
> not included in depend.make. I guess this is done to save some time
> checking all those dependencies as system files are supposed to be
> relatively stable, but if they’re not, it creates trouble of course.

> Is there any way to change this behaviour? (ideally something like for
> one time only, check if dependent system include files are more recent
> then what was compiled, but that’s a stretch of course).

The problem is: that wouldn't help, as most package managers install
files with timestamps from packages rather than their installation time.

   Simon

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