Makefile experts, unite!

[ketmar via Digitalmars-d]

H. S. Teoh wrote:

>> and i really mean it: it was less than a second even for a huge
>> projects, where linking alone took long enough that i could get coffee
>> and cigarette.  ;-)
> [...]
>
> Your project is not huge enough. :-D

~20MB, >2000 source files. for *this* it was something like 0.5-3 seconds 
(it obviously oscillates). and of course, i'm not talking about full 
rebuilds. this is *all* the time k8jam spent before invoking compiler/linker.

and for pathological 800MB use cases... don't do that. you obviously don't 
need to have thing thing as a one huge project (althru i'm sure that k8jam 
can do it).

k8jam can use timestamps and md5 sums to detect changes (althru i'm usually 
using only timestamps, and had zero problems with it ever), and it can 
optionally cache gathered info.

note that even for small "helloworld" C project, k8jam also checks *all* 
standard libc include files that which brought into the project even by 
simple `#inlcude <stdlib.h>`! and i never bothered to optimize this, 'cause 
it takes no time anyway.