* Bob Friesenhahn wrote on Thu, Jan 13, 2011 at 08:32:01PM CET: > On Thu, 13 Jan 2011, Ralf Wildenhues wrote: > >You can implement hash-based dependencies inside GNU make if you like. > >Or another make. Maybe someone has even done so already. It has little > >to do with Automake. > > I have never heard of such a thing implemented in make. It would > surely bloat the makefile by more megabytes or be excruciatingly > slow.
That's not what I meant. You can hack the source code of GNU make with the goal to (optionally) replace timestamp-based dependencies with file-hash-based depdendencies. No changes at all in any user makefiles. It's not a large change even. IIRC somebody has done this already, it just hasn't been merged upstream. BTW, Nathanael's propositions in this thread go in the same direction: http://gcc.gnu.org/ml/gcc-patches/2010-11/msg01504.html Cheers, Ralf
