Wow that is fast.
My fastest machine, and I have several slower:
gmp
time sh -c "CC=gcc-4.2 ./configure none-none-none -disable-shared
-enable-static && make && ssh r...@localhost \"cd `pwd` && make install\""
real 2m2.594s
mpfr
time sh -c "./configure -disable-shared -enable-static && make && ssh
r...@localhost \"cd `pwd` && make install\""
real 0m43.756s
mpc
time sh -c "./configure -disable-shared -enable-static && make && ssh
r...@localhost \"cd `pwd` && make install\""
real 0m15.495s
which is still a significant fraction of building cc1 (I don't have that time
sorry)
I used to use Cygwin. Things add up much faster there.
> mpfr et al. If you're not, it only happens once.
Almost anything long but incremental can be justified via incrementality.
But there is also, occasionally, mass bouts of trying to get the configure
switches just right and
starting over repeatedly...at least me being unsure of incrementality in the
fact of rerunning configure...
Anyway, just putting it out there, probably won't happen, but configure
-without-mpc -without-mpfr might be nice
and aren't difficult, -without-gmp much better, but I can't yet claim it isn't
difficult.
Maybe, something like, if gmp is "in tree", after configure, the Makefile could
be hacked down
to omit mpf, mpq, and lots others, but then the linkage between gcc and gmp
gets messy.
i.e. as gmp changes.
- Jay
----------------------------------------
> Date: Mon, 27 Sep 2010 11:37:04 +0100
> From: a...@redhat.com
> To: jay.kr...@cornell.edu
> CC: gcc@gcc.gnu.org
> Subject: Re: eliminating mpc/mpfr and reducing gmp
>
> On 09/27/2010 01:23 AM, Jay K wrote:
> >
> > Hi. You know, gmp/mpfr/mpc are a significant
> > portion of building any frontend/backend.
>
> I disagree. Most of the time I don't notice them.
>
> > The result is a lot faster to build, if you are just doing a just
> > a single stage build of a compiler.
>
> Sure, but if you're working on the compiler you don't need to rebuild
> mpfr et al. If you're not, it only happens once.
>
> On my box, for mpc:
>
> real 0m2.624s
> user 0m3.336s
> sys 0m1.663s
>
> and for mpfr:
>
> real 0m4.484s
> user 0m12.006s
> sys 0m5.127s
>
> Andrew.
