reducing compiler instances during buildkernel

[Peter Jeremy]

On 2011-Nov-05 22:30:21 +0000, Alexander Best <arundel at freebsd.org> wrote:
>wouldn't it be possible to somehow spawn N gcc or clang instances
>(make -jN buildkernel) and then pipe the src to one of those N instances?
>just like with something like multics N processes were started and then people
>used the job control language to load binaries into those processes.

This is likely to require very non-trivial changes to gcc or clang.
The major issue is that the process needs to be in a known initial
state before beginning a compile - and it's very unlikely that the
compiler cleans itself up enough to return to that state.

If you really want to trim low-hanging fruit, try disposing of libtool
and GNU configure instead - their overheads are _many_ orders of
magnitude higher than make exec()ing gcc.

-- 
Peter Jeremy
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