This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: GCC 4.1: Buildable on GHz machines only?
- From: Peter O'Gorman <peter at pogma dot com>
- To: Joe Buck <Joe dot Buck at synopsys dot COM>
- Cc: Alexandre Oliva <aoliva at redhat dot com>, David Edelsohn <dje at watson dot ibm dot com>,Andrew Haley <aph at redhat dot com>, Andreas Schwab <schwab at suse dot de>, Richard Earnshaw <rearnsha at gcc dot gnu dot org>,Andrew Pinski <pinskia at physics dot uc dot edu>, Paul Koning <pkoning at equallogic dot com>, s dot bosscher at student dot tudelft dot nl, gcc at gcc dot gnu dot org, matt at 3am-software dot com, cow at compsoc dot man dot ac dot uk
- Date: Wed, 04 May 2005 09:06:14 +0900
- Subject: Re: GCC 4.1: Buildable on GHz machines only?
- References: <200504272055.j3RKtJfL013789@earth.phy.uc.edu> <1114694844.2729.240.camel@pc960.cambridge.arm.com> <17008.59023.361787.925505@cuddles.cambridge.redhat.com> <jebr7z80nt.fsf@sykes.suse.de> <17009.2368.986169.753001@cuddles.cambridge.redhat.com> <200504281609.j3SG9ZD27524@makai.watson.ibm.com> <20050428164727.GB30649@synopsys.com> <200504281654.j3SGs0D27158@makai.watson.ibm.com> <oracncw0a1.fsf@livre.redhat.lsd.ic.unicamp.br> <20050503220342.GA23969@synopsys.com>
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Joe Buck wrote:
| Richard Henderson showed that the libjava build spends 2/3 of its time
| in libtool, and that his hand-hacked (but not portable) modification to
| invoke the appropriate binutils commands directly gave a huge speedup.
| To me, 300% overhead means major breakage, so we need a better libtool.
| However, this better libtool might not yet exist.
Probably doesn't. Ralf has done lots of work on libtool HEAD, making it 20%
faster, but that will not be in a libtool release anytime soon.
Part of the problem here is the use of a convenienve library to hold several
thousand object files and then making a shared library with the convenience
library. On many platforms, those without a --whole-archive flag, libtool
will extract the convenience archive all over again. Linking the shared
library all in one go would be faster.
Peter
- --
Peter O'Gorman - http://www.pogma.com
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.0 (Darwin)
iQCVAwUBQngR9riDAg3OZTLPAQLUwwP+I+xq38TklAgu/YSi81QJn4UzbOCOrRro
5SWfj7QM9Os66QxpKp6Ds0l0lREr3p/ytj4OlHtZ4NeAMt33rD4j5KGaK3K83jbj
Qcij/uJHHoSe3KJftnoJg/9/RWAWlxhFTS5oJhgBOSpcdYtrdAdj9m2k1qV+BQum
q2ZuThhgd2c=
=lYSE
-----END PGP SIGNATURE-----