public inbox for ecos-devel@sourceware.org
 help / color / mirror / Atom feed
From: Tomas Frydrych <tf+lists.ecos@r-finger.com>
To: ecos-devel@ecos.sourceware.org
Subject: Re: Gnutools: consideration for upgrade to GCC 4.6
Date: Tue, 17 Jan 2012 16:25:00 -0000	[thread overview]
Message-ID: <4F15A0EA.4070008@r-finger.com> (raw)
In-Reply-To: <4F159D3C.1060108@meduna.org>

Hi,

On 17/01/12 16:09, Stanislav Meduna wrote:
> On 17.01.2012 10:36, Tomas Frydrych wrote:
>> Some of the more recent gccs were not producing usable binaries on some
>> platforms (including arm) with the -Os option. I do not know if this is
>> the case with 4.6.2, and I don't think ecos uses -Os by default, but it
>> is probably worth checking whether this works (and at least documenting
>> somewhere if it does not).
> 
> Do you happen to have more details on this - versions, flags used,
> example to reproduce...?
> 
> http://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html says
> 
>   -Os enables all -O2 optimizations that do not typically increase
>   code size. It also performs further optimizations designed
>   to reduce code size.
> 
> it would be good to know whether the problems come from -O2 (which
> would be a major problem) or from these further optimizations.

It was known to be present in gcc 4.5.1, and it was not effecting the
-O2 option, only -Os. The openembedded/yoctoproject guys run into it
building u-boot, and it was mentioned yesterday on the poky mailing
list,
https://lists.yoctoproject.org/pipermail/poky/2012-January/007472.html.

Tomas


  reply	other threads:[~2012-01-17 16:25 UTC|newest]

Thread overview: 76+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-13 17:01 Ilija Kocho
2012-01-13 18:54 ` Bernard Fouché
2012-01-13 19:39   ` Ilija Kocho
2012-01-13 19:09 ` Frank Pagliughi
2012-01-13 19:45   ` Ilija Kocho
2012-01-14 10:22 ` John Dallaway
2012-01-14 16:02   ` Sergei Gavrikov
2012-01-15 17:36     ` Grant Edwards
2012-01-15 18:42       ` Sergei Gavrikov
2012-01-15 21:39         ` Stanislav Meduna
2012-01-23  1:01           ` Jonathan Larmour
2012-01-15 22:21         ` Ilija Kocho
2012-01-15 22:21         ` Ilija Kocho
2012-01-23  1:07           ` Jonathan Larmour
2012-01-16 15:20         ` Grant Edwards
2012-01-16 20:43           ` Sergei Gavrikov
2012-01-16 21:11             ` Sergei Gavrikov
2012-01-17  9:58               ` Bernard Fouché
2012-01-17 10:38                 ` Paul Beskeen
2012-01-17 12:28                   ` Sergei Gavrikov
2012-01-23  0:59     ` Jonathan Larmour
2012-01-14 16:25   ` Ilija Kocho
2012-01-23  1:13     ` Jonathan Larmour
2012-01-23 18:40       ` Ilija Kocho
2012-01-23 19:29         ` Jonathan Larmour
2012-01-25 12:30         ` Alex Schuilenburg
2012-01-25 20:59           ` Ilija Kocho
2012-01-26 13:36             ` Alex Schuilenburg
2012-01-26 20:18               ` Ilija Kocho
2012-02-13 22:02           ` eCos GNU tools 4.6.2-20120125 ready for testing [Was Re: Gnutools: consideration for upgrade to GCC 4.6] Ilija Kocho
2012-02-20 16:00             ` Alex Schuilenburg
2012-02-20 20:45               ` Ilija Kocho
2012-03-02 16:36             ` Alex Schuilenburg
2012-03-03 13:32               ` Ilija Kocho
2012-03-04  0:10                 ` Alex Schuilenburg
2012-03-04 17:49                   ` Sergei Gavrikov
2012-03-04 23:08                     ` Alex Schuilenburg
2012-03-04 19:37                   ` eCos GNU tools 4.6.2-20120125 ready for testing John Dallaway
2012-03-04 23:47                     ` Alex Schuilenburg
2012-03-05  8:00                       ` Sergei Gavrikov
2012-03-07 13:51                         ` Sergei Gavrikov
2012-03-07 11:58                       ` Alex Schuilenburg
2012-03-07 13:01                         ` Ilija Kocho
2012-03-07 13:39                           ` Sergei Gavrikov
2012-03-07 13:13                         ` John Dallaway
2012-03-12 16:43                           ` Alex Schuilenburg
2012-03-16 15:05                             ` Alex Schuilenburg
2012-03-08 17:28                         ` Alex Schuilenburg
2012-03-09  9:39                           ` Ilija Kocho
2012-03-09 17:15                             ` Alex Schuilenburg
2012-03-10 17:16                           ` John Dallaway
2012-03-12 16:12                             ` Alex Schuilenburg
2012-03-13 13:31                               ` Alex Schuilenburg
2012-03-13 14:16                                 ` Ilija Kocho
2012-03-13 17:47                                   ` Sergei Gavrikov
2012-03-15  8:50                                     ` John Dallaway
2012-03-17 14:50                                       ` Sergei Gavrikov
2012-03-17 20:58                                         ` John Dallaway
2012-03-17 16:44                                       ` Stanislav Meduna
2012-03-18 19:10                                   ` eCos GNU tools 4.6.3-20120315 [Was Re: eCos GNU tools 4.6.2-20120125 ready for testing] Ilija Kocho
2012-04-04 12:57                                     ` Lambrecht Jürgen
2012-04-04 13:18                                       ` Ilija Kocho
2012-05-31  8:42                                         ` eCos GNU tools 4.6.3-20120315 and link time optimization Bernard Fouché
2012-03-05  8:30                     ` eCos GNU tools 4.6.2-20120125 ready for testing Tomas Frydrych
2012-03-05  8:56                       ` Tomas Frydrych
2012-03-05  9:50                         ` John Dallaway
2012-03-05  9:55                           ` Anders Montonen
2012-03-05 14:20                             ` John Dallaway
2012-03-05 10:16                           ` Ilija Kocho
2012-03-05 12:56                             ` Tomas Frydrych
2012-03-03 12:58             ` eCos GNU tools 4.6.2-20120125 ready for testing [Was Re: Gnutools: consideration for upgrade to GCC 4.6] Sergei Gavrikov
2012-01-17  9:37 ` Gnutools: consideration for upgrade to GCC 4.6 Tomas Frydrych
2012-01-17 16:10   ` Stanislav Meduna
2012-01-17 16:25     ` Tomas Frydrych [this message]
2012-01-17 16:45     ` Ilija Kocho
2012-01-20 14:42       ` Frank Pagliughi

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4F15A0EA.4070008@r-finger.com \
    --to=tf+lists.ecos@r-finger.com \
    --cc=ecos-devel@ecos.sourceware.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).