On 8/30/06, Vladimir G. Ivanovic [EMAIL PROTECTED] wrote:
On Mon, 2006-08-21 at 20:06 -0700, Richard Fish wrote:
-Os seems to take much less time and memory to compile than -O2 or -O3. And
being a
~arch user, time-to-compile is a nice thing to reduce.
It is possible that one of my usual
On Wed, 2006-08-23 at 12:40 -0700, Richard Fish wrote:
On 8/23/06, Alan Mckinnon [EMAIL PROTECTED] wrote:
Can you be absolutely certain I'm wrong? Can you absolutely guarantee
that a recompile with a different config MUST be treated differently to
an upgrade?
We are still talking about
On Wed, 2006-08-23 at 12:06 -0700, Richard Fish wrote:
More seriously, there is some really _stupid_ information about
upgrading gcc on the gentoo-wiki and forums that seems to crop up here
every few months, and it makes me really, really angry. Stupid crap
like needing to emerge -e system ;
On Wed, 23 Aug 2006, Richard Fish wrote:
What would break with -Os that wouldn't break with -O2?
I was under the impression that both flags only allowed
changes that didn't affect the output.
No, the output *is* allowed to change based on -Os, -O2, or -O3. This
is the entire point of
On Tue, 2006-08-22 at 20:36 +0200, Adrian Frith wrote:
On Tue, 2006-08-22 at 16:12 +0200, Alan Mckinnon wrote:
modify CFLAGS in /etc/make.conf
emerge -e system
emerge -s world
This will rebuild your toolchain (gcc, glibc and friends) to use -O2
then rebuild the entire system,
On Tue, 2006-08-22 at 11:40 -0700, Richard Fish wrote:
On 8/22/06, Alan Mckinnon [EMAIL PROTECTED] wrote:
Your current compiler was built with -O3, and you want to rebuild the
system using a compiler compiled as -O2, hence the 2 step process.
*Sigh*. I am so tired of this completely wrong
On Wednesday 23 August 2006 09:43, Alan Mckinnon wrote:
I believe the gcc ebuild does do a bootstrap compile, which does imply
that emerge -e system is redundant.
But, we had a huge long rambling thread on this point recently which I'd
rather not rehash again :-) and IIRC the general
On Wed, 2006-08-23 at 13:29 +0200, Bo Ørsted Andresen wrote:
On Wednesday 23 August 2006 09:43, Alan Mckinnon wrote:
I believe the gcc ebuild does do a bootstrap compile, which does imply
that emerge -e system is redundant.
But, we had a huge long rambling thread on this point recently
On 8/23/06, Alan Mckinnon [EMAIL PROTECTED] wrote:
Incidentally, gcc cannot use itself to compile itself - that's
nonsensical and a classic bootstrap problem. It uses a binary (which
happens to be a gcc) to compile the source code for gcc which produces
another binary. That binary then compiles
On 8/23/06, Alan Mckinnon [EMAIL PROTECTED] wrote:
Can you be absolutely certain I'm wrong? Can you absolutely guarantee
that a recompile with a different config MUST be treated differently to
an upgrade?
We are still talking about CFLAGS here, right? Then ok, no, it is not
_necessary_ to
Richard Fish wrote:
Gcc is (almost) always built with -O2 on Gentoo, but it does not
matter anyway. The CFLAGS that gcc is built with does not effect the
binaries it generates...only the code and the flags passed to gcc
during the compilation effect this. If your model were correct, you
On Wed, 23 Aug 2006, Richard Fish wrote:
Oh, and BTW, on gentoo your optimization choices for gcc are -O, -O2
or nothing, because all other -O options are replaced with -O2 by
toolchain.eclass.
Since the OP wanted -Os, the question remains:
How, if at all, can he get -Os ?
--
Mike [EMAIL
On Wednesday 23 August 2006 22:22, Michael Hennebry wrote:
Oh, and BTW, on gentoo your optimization choices for gcc are -O, -O2
or nothing, because all other -O options are replaced with -O2 by
toolchain.eclass.
Since the OP wanted -Os, the question remains:
How, if at all, can he get -Os
Bo Ørsted Andresen wrote:
On Wednesday 23 August 2006 22:22, Michael Hennebry wrote:
Oh, and BTW, on gentoo your optimization choices for gcc are -O, -O2
or nothing, because all other -O options are replaced with -O2 by
toolchain.eclass.
Since the OP wanted -Os, the question remains:
How, if
On Tuesday 22 August 2006 05:18, Richard Fish wrote:
Actually there is. You can find all packages not compiled with -Os
and rebuild them with something like:
cd /var/db/pkg
for pkg in */* ; do
grep -v -- -Os $pkg/CFLAGS /dev/null
test $? -eq 0 emerge --oneshot =$pkg
done
On Wed, 23 Aug 2006, Stefan G. Weichinger wrote:
Bo Ørsted Andresen wrote:
On Wednesday 23 August 2006 22:22, Michael Hennebry wrote:
Oh, and BTW, on gentoo your optimization choices for gcc are -O, -O2
or nothing, because all other -O options are replaced with -O2 by
toolchain.eclass.
Michael Hennebry wrote:
Oh, and BTW, on gentoo your optimization choices for gcc are -O, -O2
or nothing, because all other -O options are replaced with -O2 by
toolchain.eclass.
Perhaps I misunderstood the preceeding.
I'd taken it to mean that recompiling any package with gentoo tools
On Wednesday 23 August 2006 23:48, Michael Hennebry wrote:
Oh, and BTW, on gentoo your optimization choices for gcc are -O, -O2
note 'choices for gcc' above ^
or nothing, because all other -O options are replaced with -O2 by
toolchain.eclass.
On Thursday 24 August 2006 00:21, Bo Ørsted Andresen wrote:
will either have to look at the ebuilds and any eclasses that they append
s/append/inherit/
--
Bo Andresen
pgpJ5logQmBhQ.pgp
Description: PGP signature
Richard Fish schrieb:
On 8/21/06, Stefan G. Weichinger [EMAIL PROTECTED] wrote:
Richard Fish schrieb:
or emerge -e world to complete. I would be tempted to just change
the flags and hold off on recompiling everything until the next
version of gcc comes out.
( ... next version in terms
Richard Fish schrieb:
On 8/21/06, Stefan G. Weichinger [EMAIL PROTECTED] wrote:
Acer TM 634
P4-M 1.8GHz (cpu family : 15, model : 2)
512 MB RAM
30 GB 5200 rpm HDD
It's all relative. I have a 2.1Ghz Core Duo with 2G of RAM and a
160Gb HD, so *I* would consider your laptop, um,
On Mon, 2006-08-21 at 22:51 +0200, Stefan G. Weichinger wrote:
I *don't* want to start some flamewar her, I am a newbie in this group,
and I just would like some info on how to do it right, as my extensive
rtfm'ing/googling/etc. has still not given me a satisfying answer.
I started my
On Tuesday 22 August 2006 05:18, Richard Fish wrote:
I see the point in this. (AFAIK there is no way to break up emerge -e
xy into smaller pieces, something to do in several separated steps.
Actually there is. You can find all packages not compiled with -Os
and rebuild them with something
Alan Mckinnon wrote:
Now the question:
Do I have to do emerge -e --newuse world on my system or what else
would be needed?
modify CFLAGS in /etc/make.conf
emerge -e system
emerge -s world
Why is he searching for a package with world in it? I think you meant
to put emerge -e
On 8/22/06, Alan Mckinnon [EMAIL PROTECTED] wrote:
Your current compiler was built with -O3, and you want to rebuild the
system using a compiler compiled as -O2, hence the 2 step process.
*Sigh*. I am so tired of this completely wrong information showing up here.
1. It does not matter what
Adrian Frith wrote:
On Tue, 2006-08-22 at 16:12 +0200, Alan Mckinnon wrote:
modify CFLAGS in /etc/make.conf
emerge -e system
emerge -s world
This will rebuild your toolchain (gcc, glibc and friends) to use -O2
then rebuild the entire system, including the toolchain again, with -O2.
Bo Ørsted Andresen wrote:
On Tuesday 22 August 2006 05:18, Richard Fish wrote:
I see the point in this. (AFAIK there is no way to break up emerge -e
xy into smaller pieces, something to do in several separated steps.
Actually there is. You can find all packages not compiled with -Os
and
On Tuesday 22 August 2006 21:30, Richard Fish wrote:
revdep-rebuild --library=libstdc++.so.6
emerge --prune gcc
emerge -e world
Am I correct that the revdep-rebuild step is redundant if you don't need any
C++ apps for the next 48 hours (assuming the emerge -e world completes
successfully)?
On 8/22/06, Richard Fish [EMAIL PROTECTED] wrote:
On 8/22/06, Bo Ørsted Andresen [EMAIL PROTECTED] wrote:
Am I correct that the revdep-rebuild step is redundant if you don't need any
C++ apps for the next 48 hours (assuming the emerge -e world completes
successfully)?
Yep.
Oh, except that
On Tuesday 22 August 2006 23:04, Richard Fish wrote:
On 8/22/06, Richard Fish [EMAIL PROTECTED] wrote:
On 8/22/06, Bo Ørsted Andresen [EMAIL PROTECTED] wrote:
Am I correct that the revdep-rebuild step is redundant if you don't
need any C++ apps for the next 48 hours (assuming the emerge
Richard Fish wrote:
On 8/22/06, Richard Fish [EMAIL PROTECTED] wrote:
On 8/22/06, Bo Ørsted Andresen [EMAIL PROTECTED] wrote:
Am I correct that the revdep-rebuild step is redundant if you don't
need any
C++ apps for the next 48 hours (assuming the emerge -e world completes
successfully)?
On 8/22/06, Bo Ørsted Andresen [EMAIL PROTECTED] wrote:
Now I'm confused.. ;) Would pruning the old gcc before running emerge -e world
break anything that's isn't a C++ app?
Well, technically, no. But considering that some python modules are
implemented in C++ and link against libstdc++
On Tuesday 22 August 2006 23:50, Richard Fish wrote:
Now I'm confused.. ;) Would pruning the old gcc before running emerge -e
world break anything that's isn't a C++ app?
Well, technically, no. But considering that some python modules are
implemented in C++ and link against libstdc++
I *don't* want to start some flamewar her, I am a newbie in this group,
and I just would like some info on how to do it right, as my extensive
rtfm'ing/googling/etc. has still not given me a satisfying answer.
I started my Gentoo-installation with CFLAGS containing -O3, believing
to do it right
On Mon, 21 Aug 2006 22:51:43 +0200, Stefan G. Weichinger wrote:
Now I read about the fact that -O3 results in bigger binaries and isn't
at all guaranteed to give me a faster system. The bigger files result in
more load on IO, so this tells me that it puts the load on the
(relatively slow)
On 8/21/06, Neil Bothwick [EMAIL PROTECTED] wrote:
On Mon, 21 Aug 2006 23:27:14 +0200, Stefan G. Weichinger wrote:
So it is not *that* constrained in terms of RAM and disk, I assume.
But I am also ready to go the -Os-way if you recommend/suggest it for my
system.
Many laptops have
On 8/21/06, Stefan G. Weichinger [EMAIL PROTECTED] wrote:
Acer TM 634
P4-M 1.8GHz (cpu family : 15, model : 2)
512 MB RAM
30 GB 5200 rpm HDD
It's all relative. I have a 2.1Ghz Core Duo with 2G of RAM and a
160Gb HD, so *I* would consider your laptop, um, underpowered. :-)
But I also run
On 8/21/06, Stefan G. Weichinger [EMAIL PROTECTED] wrote:
Richard Fish schrieb:
or emerge -e world to complete. I would be tempted to just change
the flags and hold off on recompiling everything until the next
version of gcc comes out.
( ... next version in terms of minor- or
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