Use Time::HiRes when available and fallback to raw syscall interface
when not. If that fails too, simply report 0, 0 as real time.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
(backported from a692e4e3de60e1a10906511fb8ef2d14937d4a19)
Replace the GNU time program invocation with a simple Perl script reporting
the timing values. Since we require Perl anyway for the build system, we can
as well use that instead of requiring a random GNU utility rarely installed
by default.
Fixes: ff6e62b288 ("build: log time taken by each packages/steps")
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
(backported from d3ddf6631e491a831617a5ae8b3d7924e47a275a)
