-j6 build

[Jean-Marc Saffroy]

On 08/24/2010 06:33 AM, Mike Stump wrote:
> So, I have a cgen port and am wondering, is there anyway to speed up the 6 minute build that uses 1 core, to being a 1 minute build that uses 6 cores?  -j8 didn't seem to do it.
> 

FWIW setting CC="ccache gcc" and CFLAGS="-O0 -pipe" at configure time
did wonders for me (in addition to make -jN with N = 2 x number of
cores). Also I issue a single make command for all targets.

See attached makefile, which builds a complete toolchain (binutils, gcc,
newlib, and gcc for newlib).

Binutils (cgen, gas, ld, sim) now build in 36 seconds on my quad core
(44secs user, 34secs sys), with hot caches.

HTH,
JM
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