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Re: -j6 build

From: Jean-Marc Saffroy <jean-marc dot saffroy at joguin dot com>
To: Mike Stump <mikestump at comcast dot net>
Cc: cgen at sourceware dot org
Date: Tue, 24 Aug 2010 18:07:34 +0200
Subject: Re: -j6 build
References: <C62F248C-BFA3-43D5-BC72-18AE4F030CDE@comcast.net>

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

Attachment: Makefile
Description: Text document

References:
- -j6 build
  - From: Mike Stump

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