From: Thomas Schwinge <thomas@codesourcery.com>
To: Diego Novillo <dnovillo@google.com>
Cc: gcc <gcc@gcc.gnu.org>
Subject: Re: RFH - Testing targets for the switch to C++
Date: Wed, 06 Jun 2012 22:59:00 -0000 [thread overview]
Message-ID: <87r4tskpya.fsf@schwinge.name> (raw)
In-Reply-To: <CAD_=9DRrko1uYG1t29i+D+=THwdVU5nSqnBvpP5X=CjrACifHQ@mail.gmail.com>
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Hi!
A bit late to the game... :-)
On Fri, 6 Apr 2012 18:55:28 -0400, Diego Novillo <dnovillo@google.com> wrote:
> I have started testing the switch to C++ and there is a pile of
> testing to be done. The testing itself is trivial, but the number of
> targets that need to be tested is large and I don't have access to all
> these combinations.
i686-gnu would be mine.
This is based on 8b64dc3c58b54d07156c99a24576be76e8cbdc10 (2012-05-28)
sources, doing native builds on x86 Debian GNU/Linux as well as x86
Debian GNU/Hurd.
When --enable-build-with-cxx is enabled:
* Build time mostly stays the same.
* Looking at the build log, the build system's gcc (as opposed to g++)
is still being used for building libiberty, fixincludes, zlib,
libdecnumber, *_FOR_BUILD stuff in gcc/Makefile. The latter seems to
have been addressed in a44c8c3b1ee8ae1779fd8ee1ad556ed86a608bd2
(2012-05-31), the others are probably expected to continue using gcc.
* The size of the build directory stage1-gcc shrinks (!) from 1.1 GiB
to 0.4 GiB, such that the whole build tree then occupies 2.6 GiB
instead of 3.2 GiB. I did notice that the C build uses
-fkeep-inline-functions, and the C++ build doesn't (my logs, and
confirmed in the top-level configure.ac), but don't know if that is
the (sole) reason; I have not looked at this in more detail -- but
0.6 GiB or 60 % less is quite a bit.
* No difference in testsuite results.
When building a i686-linux-gnu to i686-gnu cross-compiler, there are
(expectedly) no surprises either.
Grüße,
Thomas
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next prev parent reply other threads:[~2012-06-06 22:59 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-06 22:55 Diego Novillo
2012-04-07 17:16 ` Marc Glisse
2012-04-07 19:01 ` Diego Novillo
2012-04-10 0:26 ` Gerald Pfeifer
2012-04-10 12:37 ` Diego Novillo
2012-04-10 13:05 ` NightStrike
2012-04-10 13:08 ` Diego Novillo
2012-04-10 13:27 ` NightStrike
2012-04-10 13:49 ` Diego Novillo
2012-06-15 16:43 ` NightStrike
2012-06-15 17:24 ` Diego Novillo
2012-06-15 17:41 ` NightStrike
2012-04-10 13:59 ` Paul_Koning
2012-04-10 15:30 ` Diego Novillo
2012-04-10 18:48 ` David Weatherford
2012-04-11 23:51 ` Diego Novillo
2012-04-10 14:36 ` Rainer Orth
2012-04-10 15:30 ` Diego Novillo
2012-04-10 15:33 ` Rainer Orth
2012-04-10 15:53 ` Marc Glisse
2012-04-10 15:58 ` Rainer Orth
2012-04-10 16:14 ` Marc Glisse
2012-04-10 16:22 ` Rainer Orth
2012-04-10 16:28 ` Marc Glisse
2012-04-10 16:38 ` Diego Novillo
2012-04-11 15:19 ` Rainer Orth
2012-04-11 15:31 ` Diego Novillo
2012-04-12 7:12 ` Sebastian Huber
2012-04-12 12:32 ` Diego Novillo
2012-04-12 15:37 ` Ralf Corsepius
2012-04-12 17:13 ` Diego Novillo
2012-06-06 22:59 ` Thomas Schwinge [this message]
2012-06-11 13:48 ` Diego Novillo
2012-06-11 15:03 ` Thomas Schwinge
2012-04-07 20:09 Joel Sherrill
2012-04-07 20:22 ` Diego Novillo
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