Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
maxim wexler wrote: Too late. Damage done. I decided to go with the example make.conf which call the O3 level decent. -- gentoo-user@gentoo.org mailing list Exactly what kind of damage are you talking about? Don't you think if there was a real problem with -O3, gentoo devs would have excluded it as an option, especially when they have an easy to apply mechanism for doing that (I have in mind the filter-flags replace-flags functions in the ebuilds)? All of my gentoo systems were build using -O3 and I haven't met a single problem with this setting. Of course there are packages (like the already mentioned OO2 and some others) which won't build with extreme optimization and the devs have taken care of this by forcing appropriate C(XX)FLAGS. It is my opinion that the statements like -O3 is wrong and can do damage is nothing but FUD. It is questionable if -O3 helps building faster packages than those built with -O2 but for sure it won't do damage. -- Best regards, Daniel -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
On Wednesday 11 April 2007 11:39:50 Daniel Iliev wrote: Exactly what kind of damage are you talking about? Don't you think if there was a real problem with -O3, gentoo devs would have excluded it as an option, especially when they have an easy to apply mechanism for doing that (I have in mind the filter-flags replace-flags functions in the ebuilds)? -O3 is replaced where necessary because it's supported by Gentoo. Unsupported flags are mostly not filtered as Gentoo devs don't wish to hide problems caused by stupid users. Bugs caused by unsupported flags are therefore mostly resolved invalid. [SNIP] It is my opinion that the statements like -O3 is wrong and can do damage is nothing but FUD. It's true if you don't use Gentoo ebuilds. -- Bo Andresen pgpsTdqtUmIxQ.pgp Description: PGP signature
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
Bo Ørsted Andresen wrote: On Wednesday 11 April 2007 11:39:50 Daniel Iliev wrote: Exactly what kind of damage are you talking about? Don't you think if there was a real problem with -O3, gentoo devs would have excluded it as an option, especially when they have an easy to apply mechanism for doing that (I have in mind the filter-flags replace-flags functions in the ebuilds)? -O3 is replaced where necessary because it's supported by Gentoo. Unsupported flags are mostly not filtered as Gentoo devs don't wish to hide problems caused by stupid users. Bugs caused by unsupported flags are therefore mostly resolved invalid. [SNIP] It is my opinion that the statements like -O3 is wrong and can do damage is nothing but FUD. It's true if you don't use Gentoo ebuilds. Sorry, I don't get it. Perhaps it is my poor English but I couldn't understand two things: - Is -O3 supported by Gentoo or not? - What's the special thing about Gentoo ebuilds that makes -O3 dangerous? -- Best regards, Daniel -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
Em Quarta 11 Abril 2007 07:56, Daniel Iliev escreveu: Sorry, I don't get it. Perhaps it is my poor English but I couldn't understand two things: - Is -O3 supported by Gentoo or not? Yes. - What's the special thing about Gentoo ebuilds that makes -O3 dangerous? Nothing. O3 isn't dangerous... =] -- Best regards, Daniel cya -- Davi Vidal [EMAIL PROTECTED] [EMAIL PROTECTED] -- Agora com fortune: Zoe: We're going to get the captain. Kaylee: Oh, good Can they do that? Jayne: No. -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
On Wednesday 11 April 2007 12:56:43 Daniel Iliev wrote: Sorry, I don't get it. Perhaps it is my poor English but I couldn't understand two things: - Is -O3 supported by Gentoo or not? -O3 is supported by Gentoo. - What's the special thing about Gentoo ebuilds that makes -O3 dangerous? No no. The special thing about Gentoo ebuilds is that -O3 in make.conf is safe for all packages because those packages for which -O3 isn't safe are replacing it with -O2 in the ebuilds (or eclasses). -- Bo Andresen pgpIXSGE9SNGp.pgp Description: PGP signature
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
Hi all.. I think what -O3 is not _dangerous_ when you know how to use, a few posts ago someone mentioned not all of packages can be compiled using -O3, if I am not wrong was GCC and OpenOffice.org. The thing is: -O3 is not a _damage_ is an carefully flag to compile for some packages.. In some webpages I people said : .. -O3 is not used by developer because come troubles when you want to do a debug... But: http://www.nersc.gov/vendor_docs/intel/f_ug2/dbg_opt.htm, http://linuxgazette.net/121/hegde.html, http://publib.boulder.ibm.com/infocenter/macxhelp/v6v81/index.jsp?topic=/com.ibm.xlf81m.doc/pgs/ug42.htm . ...The following setting is the Optimizations. You shouldn't use O3 as it takes longer to compile, the generated code will be sometimes faster, sometimes slower and almost always larger. For example, a program that was compiled with the O2 level of optimization is 250KB large and is quite fast, the same program compiled with the O3 level of optimization can take more time to compile, produce a larger binary, depending on the code, even 500-700KB large and it can be slower or faster. Therefore, the O3 optimization level isn't recommended. Use O2 if you need the best optimization without adding the risk of obtaining large binaries, which need a long time to be loaded before being executed and are not always faster... take of http://www.softpedia.com/reviews/linux/Gentoo-Review-20543.shtml. On 4/11/07, Bo Ørsted Andresen [EMAIL PROTECTED] wrote: On Wednesday 11 April 2007 12:56:43 Daniel Iliev wrote: Sorry, I don't get it. Perhaps it is my poor English but I couldn't understand two things: - Is -O3 supported by Gentoo or not? -O3 is supported by Gentoo. - What's the special thing about Gentoo ebuilds that makes -O3 dangerous? No no. The special thing about Gentoo ebuilds is that -O3 in make.conf is safe for all packages because those packages for which -O3 isn't safe are replacing it with -O2 in the ebuilds (or eclasses). -- Bo Andresen -- ['Cause without love I won't survive, I love you]. I Francisco Rivas 2.6.19-gentoo-r5 x86 udev v087 gnome 2.16.2 xorg-x11-7.1 hotplug v20040923-r2 e-mail : [EMAIL PROTECTED] msn : [EMAIL PROTECTED] -BEGIN GEEK CODE BLOCK- Version: 3.1 GCS/E/IT/MU d-(+)@ s++: a-- C ULSC*()+++ P+(++)+++ L++(+++) !E--- W+++ !N* !o-(--)-- K--? !w--- !O !M !V PS@ !PE@ Y PGP t 5 X R++ tv- b DI D G e+ h- r+ y- --END GEEK CODE BLOCK--
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
--- Francisco Rivas [EMAIL PROTECTED] wrote: Hi all :D I think what -march=your_arch -O2 it's enough, because -O3 it's highest but have some details (http://gentoo-wiki.com/CFLAGS#-O2_or_-O3.3F). My guess is -march=your_arch -O2. I was compiled my entire system with those flags and my applications no matter which have a very good functionality... I hope give you some help to make your decision... Interesting. Just completed emerge -uvDN world using the -03 -pipe cflags in make.conf for the PIII arch. I noticed as the output scrolled by that the flags I set were being used for all packages *except* gcc which used -02 -pipe. -mw Get your own web address. Have a HUGE year through Yahoo! Small Business. http://smallbusiness.yahoo.com/domains/?p=BESTDEAL -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
On 10 April 2007, maxim wexler wrote: Interesting. Just completed emerge -uvDN world using the -03 -pipe cflags in make.conf for the PIII arch. I noticed as the output scrolled by that the flags I set were being used for all packages *except* gcc which used -02 -pipe. Some packages (ebuilds) set a maximum optimisation. Gcc is one of them, OpenOffice another one. Uwe -- A fast and easy generator of fractals for KDE: http://www.SysEx.com.na/iwy-1.0.tar.bz2 Proof of concept of a TSP solver for KDE: http://www.SysEx.com.na/epat-0.1.tar.bz2 -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
On Tuesday 10 April 2007 16:58:47 Uwe Thiem wrote: On 10 April 2007, maxim wexler wrote: Interesting. Just completed emerge -uvDN world using the -03 -pipe cflags in make.conf for the PIII arch. I noticed as the output scrolled by that the flags I set were being used for all packages *except* gcc which used -02 -pipe. Some packages (ebuilds) set a maximum optimisation. Gcc is one of them, OpenOffice another one. It's done with `replace-flags -O? -O2` so it's not a maximum. -O0 or -O1 would be replaced too... -- Bo Andresen pgpSmiiv6JNuZ.pgp Description: PGP signature
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
Hi all.. Certainly some package have a maximun optimisation. I really believe, the optimisation level is a very interesting thing bucause all depend of what you need and you have all power of your system, only gentoo can give you that. it's very good to see a server compiling most of the applications, and people with few resources in thier pc's can run a very good operating system and no die trying... :P Looking for more information on the web, I see http://www.linuxjournal.com/article/7269. In that article: ...The simplest way to achieve good performance is to rely on the -O2 optimization level; if you're not interested in portability, specify the target architecture using -march=. For space-constrained applications, the -Os optimization level should be considered first.. All is your decision based in what you need... On 4/10/07, Uwe Thiem [EMAIL PROTECTED] wrote: On 10 April 2007, maxim wexler wrote: Interesting. Just completed emerge -uvDN world using the -03 -pipe cflags in make.conf for the PIII arch. I noticed as the output scrolled by that the flags I set were being used for all packages *except* gcc which used -02 -pipe. Some packages (ebuilds) set a maximum optimisation. Gcc is one of them, OpenOffice another one. Uwe -- A fast and easy generator of fractals for KDE: http://www.SysEx.com.na/iwy-1.0.tar.bz2 Proof of concept of a TSP solver for KDE: http://www.SysEx.com.na/epat-0.1.tar.bz2 -- gentoo-user@gentoo.org mailing list -- ['Cause without love I won't survive, I love you]. I Francisco Rivas 2.6.19-gentoo-r5 x86 udev v087 gnome 2.16.2 xorg-x11-7.1 hotplug v20040923-r2 e-mail : [EMAIL PROTECTED] msn : [EMAIL PROTECTED] -BEGIN GEEK CODE BLOCK- Version: 3.1 GCS/E/IT/MU d-(+)@ s++: a-- C ULSC*()+++ P+(++)+++ L++(+++) !E--- W+++ !N* !o-(--)-- K--? !w--- !O !M !V PS@ !PE@ Y PGP t 5 X R++ tv- b DI D G e+ h- r+ y- --END GEEK CODE BLOCK--
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
El Tue, 10 Apr 2007 07:29:26 -0700 (PDT) maxim wexler [EMAIL PROTECTED] escribió: --- Francisco Rivas [EMAIL PROTECTED] wrote: Hi all :D I think what -march=your_arch -O2 it's enough, because -O3 it's highest but have some details (http://gentoo-wiki.com/CFLAGS#-O2_or_-O3.3F). My guess is -march=your_arch -O2. I was compiled my entire system with those flags and my applications no matter which have a very good functionality... I hope give you some help to make your decision... Interesting. Just completed emerge -uvDN world using the -03 -pipe cflags in make.conf for the PIII arch. I noticed as the output scrolled by that the flags I set were being used for all packages *except* gcc which used -02 -pipe. Hello, If the ebuilds were that smart to let people mess up cflags on such packages, people would need to reinstall Gentoo as much as they need to reinstall Windows. Of course the reason would be a broken toolchain, instead of a OS that gradually degrades whit the age. That is specially true when you even make typos writing cflags. See -O2 vs. -02. -- Jesús Guerrero -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Francisco Rivas said the following on 2007-04-10 17:29: | ... | Certainly some package have a maximun optimisation. I really believe, | the optimisation level is a very interesting thing bucause all depend of | what you need and you have all power of your system, only gentoo can | give you that. | That's not entirely true. Take SuSE for instance. Using SRPMs and setting your preferred compiler and linker flags, You can pretty much do the same as in Gentoo, the difference being that Gentoo makes it a lot easier :) since it - as opposed to the majority of Linux dists - is a true source code distribution. (Phew! That was a long sentence). | ... | | All is your decision based in what you need... | Agreed :) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.6 (MingW32) iD8DBQFGG7NzJDzv6DN+QUkRApF/AKDtbF/dtwC8d5ownAp+XZkRA30ruwCgqLp6 iZxCFrRl1HPohc5yj+lapug= =qUW9 -END PGP SIGNATURE- -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
don't use -O3 unless you need _extreme_ performance -O2 -finline-functions is close to -O3 but doesn't use -fno-home-register For toolchain, I just stick to -O2. For power-hungry apps, I use -O2 -finline-functions glibc developer said that inlining with gcc 4.2 screws up code, so on the safe side, just use -O2 for toolchain, -O2 -finline-functions for everything else - Andrey Vul -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
--- Andrey Vul [EMAIL PROTECTED] wrote: don't use -O3 unless you need _extreme_ performance -O2 -finline-functions is close to -O3 but doesn't use -fno-home-register For toolchain, I just stick to -O2. For power-hungry apps, I use -O2 -finline-functions glibc developer said that inlining with gcc 4.2 screws up code, so on the safe side, just use -O2 for toolchain, -O2 -finline-functions for everything else - Andrey Vul Too late. Damage done. I decided to go with the example make.conf which call the O3 level decent. -- gentoo-user@gentoo.org mailing list Sucker-punch spam with award-winning protection. Try the free Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/features_spam.html -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
Hi all.. Oh god.. well damage done, but you learn the lesson rigth?.. I believe yes. Actually all the people in the forum learn the lesson... For the nex time remember use O2 :D I hope the damage was not horrible.. and you can recover all losted. On 4/10/07, maxim wexler [EMAIL PROTECTED] wrote: --- Andrey Vul [EMAIL PROTECTED] wrote: don't use -O3 unless you need _extreme_ performance -O2 -finline-functions is close to -O3 but doesn't use -fno-home-register For toolchain, I just stick to -O2. For power-hungry apps, I use -O2 -finline-functions glibc developer said that inlining with gcc 4.2 screws up code, so on the safe side, just use -O2 for toolchain, -O2 -finline-functions for everything else - Andrey Vul Too late. Damage done. I decided to go with the example make.conf which call the O3 level decent. -- gentoo-user@gentoo.org mailing list Sucker-punch spam with award-winning protection. Try the free Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/features_spam.html -- gentoo-user@gentoo.org mailing list -- ['Cause without love I won't survive, I love you]. I Francisco Rivas 2.6.19-gentoo-r5 x86 udev v087 gnome 2.16.2 xorg-x11-7.1 hotplug v20040923-r2 e-mail : [EMAIL PROTECTED] msn : [EMAIL PROTECTED] -BEGIN GEEK CODE BLOCK- Version: 3.1 GCS/E/IT/MU d-(+)@ s++: a-- C ULSC*()+++ P+(++)+++ L++(+++) !E--- W+++ !N* !o-(--)-- K--? !w--- !O !M !V PS@ !PE@ Y PGP t 5 X R++ tv- b DI D G e+ h- r+ y- --END GEEK CODE BLOCK--
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
Em Terça 10 Abril 2007 16:01, Francisco Rivas escreveu: Hi all.. Oh god.. well damage done, but you learn the lesson rigth?.. I believe yes. Actually all the people in the forum learn the lesson... For the nex time remember use O2 :D I hope the damage was not horrible.. and you can recover all losted. How can I rebuild my system with O2?? =P I've configured my system with O3 and the HD space is going out... =P TIA -- Davi Vidal [EMAIL PROTECTED] [EMAIL PROTECTED] -- Agora com fortune: Students? barked the Archchancellor. Yes, Master. You know? They're the thinner ones with the pale faces? Because we're a *university*? They come with the whole thing, like rats -- -- (Terry Pratchett, Moving Pictures) -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
On 10 April 2007, maxim wexler wrote: --- Andrey Vul [EMAIL PROTECTED] wrote: don't use -O3 unless you need _extreme_ performance -O2 -finline-functions is close to -O3 but doesn't use -fno-home-register For toolchain, I just stick to -O2. For power-hungry apps, I use -O2 -finline-functions glibc developer said that inlining with gcc 4.2 screws up code, so on the safe side, just use -O2 for toolchain, -O2 -finline-functions for everything else - Andrey Vul Too late. Damage done. I decided to go with the example make.conf which call the O3 level decent. No real damage. Your system will work - and quite well, especially if you prelink the whole thing to overcome longer load times of O3 binaries. Uwe -- A fast and easy generator of fractals for KDE: http://www.SysEx.com.na/iwy-1.0.tar.bz2 Proof of concept of a TSP solver for KDE: http://www.SysEx.com.na/epat-0.1.tar.bz2 -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
On 10 April 2007, Davi wrote: Em Terça 10 Abril 2007 16:01, Francisco Rivas escreveu: Hi all.. Oh god.. well damage done, but you learn the lesson rigth?.. I believe yes. Actually all the people in the forum learn the lesson... For the nex time remember use O2 :D I hope the damage was not horrible.. and you can recover all losted. How can I rebuild my system with O2?? =P I've configured my system with O3 and the HD space is going out... =P O3 binaries are larger than O2 binaries but not that much. So if you are about to be out of HD space with O3 binaries you will soon be out of it with O2 binaries as well. You will need more HD space either way. That said, you can rebuild your system to be O2 by editing /etc/make.conf (O3 - O2) and the --newuse option for emerge. I don't think it's worth it. ;-) Uwe -- A fast and easy generator of fractals for KDE: http://www.SysEx.com.na/iwy-1.0.tar.bz2 Proof of concept of a TSP solver for KDE: http://www.SysEx.com.na/epat-0.1.tar.bz2 -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
On Tuesday 10 April 2007 21:45:04 Uwe Thiem wrote: That said, you can rebuild your system to be O2 by editing /etc/make.conf (O3 - O2) and the --newuse option for emerge. I don't think it's worth it. ;-) You mean --emptytree. -- Bo Andresen pgpe55VrkhfAo.pgp Description: PGP signature
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
On Tue, 10 Apr 2007 16:10:40 -0300 Davi [EMAIL PROTECTED] wrote: How can I rebuild my system with O2?? =P I've configured my system with O3 and the HD space is going out... =P Change your CFLAGS to have -O2 instead of -O3 and then run emerge -e world. If you don't have enough space then unmerge some unneeded stuff before reemerging world. Cheers, Renat -- Probleme kann man niemals mit derselben Denkweise loesen, durch die sie entstanden sind. (Einstein) signature.asc Description: PGP signature
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
El Tue, 10 Apr 2007 20:45:04 +0100 Uwe Thiem [EMAIL PROTECTED] escribió: How can I rebuild my system with O2?? =P I've configured my system with O3 and the HD space is going out... =P O3 binaries are larger than O2 binaries but not that much. So if you are about to be out of HD space with O3 binaries you will soon be out of it with O2 binaries as well. You will need more HD space either way. Yes. No way around that. That said, you can rebuild your system to be O2 by editing /etc/make.conf (O3 - O2) and the --newuse option for emerge. I don't think it's worth it. ;-) No, --newuse is for use flags. He need to rebuild ALL the packages. So, emerge --emptytree world would do. -- Jesús Guerrero -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
Em Terça 10 Abril 2007 16:56, Jesús Guerrero escreveu: No, --newuse is for use flags. He need to rebuild ALL the packages. So, emerge --emptytree world would do. ** Thinking: rebuild all = all packages = kde + Xorg + glibc + OOo + ... Humm... ** Well... I'm _very_ fine with -O3 flag... u.u' I would like use the -O3 flag until format my HD instead recompile my entire system... =P Thanks a lot! -- Davi Vidal [EMAIL PROTECTED] [EMAIL PROTECTED] -- Agora com fortune: NEWSFLASH: Colonel Panic's Software Bazaar in Yakima, Washington has instituted a new policy requiring customers to undergo a five-day waiting period before purchasing any Microsoft products. -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
El Tue, 10 Apr 2007 17:08:40 -0300 Davi [EMAIL PROTECTED] escribió: Em Terça 10 Abril 2007 16:56, Jesús Guerrero escreveu: No, --newuse is for use flags. He need to rebuild ALL the packages. So, emerge --emptytree world would do. ** Thinking: rebuild all = all packages = kde + Xorg + glibc + OOo + ... Humm... ** Well... I'm _very_ fine with -O3 flag... u.u' I would like use the -O3 flag until format my HD instead recompile my entire system... =P Well, you don't need to do so. Just change the flag. Eventually, with the time, all the packages will be recompiled now or later... There is no problem with that. -- Jesús Guerrero -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
Em Terça 10 Abril 2007 17:15, Jesús Guerrero escreveu: El Tue, 10 Apr 2007 17:08:40 -0300 Davi [EMAIL PROTECTED] escribió: Em Terça 10 Abril 2007 16:56, Jesús Guerrero escreveu: No, --newuse is for use flags. He need to rebuild ALL the packages. So, emerge --emptytree world would do. ** Thinking: rebuild all = all packages = kde + Xorg + glibc + OOo + ... Humm... ** Well... I'm _very_ fine with -O3 flag... u.u' I would like use the -O3 flag until format my HD instead recompile my entire system... =P Well, you don't need to do so. Just change the flag. Eventually, with the time, all the packages will be recompiled now or later... There is no problem with that. -- Jesús Guerrero Sure! But I don't want to wait 8~9 hours to compile OOo right _now_... =P BTW, thanks for your help! =] -- Davi Vidal [EMAIL PROTECTED] [EMAIL PROTECTED] -- Agora com fortune: === ALL USERS PLEASE NOTE CAR and CDR now return extra values. The function CAR now returns two values. Since it has to go to the trouble to figure out if the object is carcdr-able anyway, we figured you might as well get both halves at once. For example, the following code shows how to destructure a cons (SOME-CONS) into its two slots (THE-CAR and THE-CDR): (MULTIPLE-VALUE-BIND (THE-CAR THE-CDR) (CAR SOME-CONS) ...) For symmetry with CAR, CDR returns a second value which is the CAR of the object. In a related change, the functions MAKE-ARRAY and CONS have been fixed so they don't allocate any storage except on the stack. This should hopefully help people who don't like using the garbage collector because it cold boots the machine so often. -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
On 10 April 2007, Jesús Guerrero wrote: El Tue, 10 Apr 2007 20:45:04 +0100 Uwe Thiem [EMAIL PROTECTED] escribió: How can I rebuild my system with O2?? =P I've configured my system with O3 and the HD space is going out... =P O3 binaries are larger than O2 binaries but not that much. So if you are about to be out of HD space with O3 binaries you will soon be out of it with O2 binaries as well. You will need more HD space either way. Yes. No way around that. That said, you can rebuild your system to be O2 by editing /etc/make.conf (O3 - O2) and the --newuse option for emerge. I don't think it's worth it. ;-) No, --newuse is for use flags. He need to rebuild ALL the packages. So, emerge --emptytree world would do. Yup. Sorry, my mistake. Uwe -- A fast and easy generator of fractals for KDE: http://www.SysEx.com.na/iwy-1.0.tar.bz2 Proof of concept of a TSP solver for KDE: http://www.SysEx.com.na/epat-0.1.tar.bz2 -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
On Tue, 10 Apr 2007 20:45:04 +0100 Uwe Thiem [EMAIL PROTECTED] wrote: O3 binaries are larger than O2 binaries but not that much. So if you are about to be out of HD space with O3 binaries you will soon be out of it with O2 binaries as well. You will need more HD space either way. That said, you can rebuild your system to be O2 by editing /etc/make.conf (O3 - O2) and the --newuse option for emerge. I don't think it's worth it. ;-) This thread contains a nice description of -02 -03 and -0s (size optimization) which makes it clear that what is actually desired here for space-saving concerns is -0s, not -03. I for some reason run -03 on all my emerges and allow the ebuilds to sort out the maximum acceptible optimization level. As far as I can tell, nothing's been broken by that. I don't run testing or anything, and it _is_ more dangerous, but I'm doing it without problems. For the record. Finally, as people have already said, --newuse is to recompile when you change your use flags. You want to rebuild the system and the world as if none of the dependancies are already installed (so that they get rebuilt too, even if not explicity a part of your world or system) and the way to do that is -e (--emptytree). Doing so after changing from -03 to -0s may actually save a decent amount of space. Furthermore, it may actually perform pretty well too. -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
On 4/10/07, Davi [EMAIL PROTECTED] wrote: Em Terça 10 Abril 2007 17:15, Jesús Guerrero escreveu: El Tue, 10 Apr 2007 17:08:40 -0300 Davi [EMAIL PROTECTED] escribió: Em Terça 10 Abril 2007 16:56, Jesús Guerrero escreveu: ** Thinking: rebuild all = all packages = kde + Xorg + glibc + OOo + ... Humm... ** Well... I'm _very_ fine with -O3 flag... u.u' I would like use the -O3 flag until format my HD instead recompile my entire system... =P Well, you don't need to do so. Just change the flag. Eventually, with the time, all the packages will be recompiled now or later... There is no problem with that. Sure! But I don't want to wait 8~9 hours to compile OOo right _now_... =P What Jesús means is that if you change the flag now, over the course of usual updates eventually everything will be recompiled. There shouldn't be any harm in having some -03 and some -02 binaries on your system, so change your make.conf and let it happen incrementally with your normal updates. -- Ryan W Sims -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
Em Terça 10 Abril 2007 19:03, Ryan Sims escreveu: On 4/10/07, Davi [EMAIL PROTECTED] wrote: Em Terça 10 Abril 2007 17:15, Jesús Guerrero escreveu: El Tue, 10 Apr 2007 17:08:40 -0300 Davi [EMAIL PROTECTED] escribió: Em Terça 10 Abril 2007 16:56, Jesús Guerrero escreveu: ** Thinking: rebuild all = all packages = kde + Xorg + glibc + OOo + ... Humm... ** Well... I'm _very_ fine with -O3 flag... u.u' I would like use the -O3 flag until format my HD instead recompile my entire system... =P Well, you don't need to do so. Just change the flag. Eventually, with the time, all the packages will be recompiled now or later... There is no problem with that. Sure! But I don't want to wait 8~9 hours to compile OOo right _now_... =P What Jesús means is that if you change the flag now, over the course of usual updates eventually everything will be recompiled. There shouldn't be any harm in having some -03 and some -02 binaries on your system, so change your make.conf and let it happen incrementally with your normal updates. -- Ryan W Sims Sure! I get it and I already changed my make.conf... =] thanks! =] -- Davi Vidal [EMAIL PROTECTED] [EMAIL PROTECTED] -- Agora com fortune: Any path which narrows future possibilities may become a lethal trap. Humans are not threading their way through a maze; they scan a vast horizon filled with unique opportunities. The narrowing viewpoint of the maze should appeal only to creatures with their noses buried in sand. Sexually produced uniqueness and differences are the life-protection of the spices. -- The Spacing Guild Handbook -- gentoo-user@gentoo.org mailing list
[gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
· maxim wexler [EMAIL PROTECTED]: One suggests using -O3 -pipe, the other, -O2 without the pipe. The resulting binaries of a -O2 -pipe compile will be the same as those of a -O2 (no pipe) compile. See http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Overall-Options.html#index-pipe-81 How much difference does this make? Is the extra level of optimization with pipe the equivalent of the lower level without? There's no extra level of optimization. So the question boils down to: Is -O3 better than -O2? Answer: Depends. On a system with not that much cache, it might not be. Alexander Skwar -- BOFH Excuse #16: somebody was calculating pi on the server -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Re: CFLAGS ...-O3 -pipe vs ...O2 no pipe
Hi all :D I think what -march=your_arch -O2 it's enough, because -O3 it's highest but have some details (http://gentoo-wiki.com/CFLAGS#-O2_or_-O3.3F). My guess is -march=your_arch -O2. I was compiled my entire system with those flags and my applications no matter which have a very good functionality... I hope give you some help to make your decision... On 4/9/07, Alexander Skwar [EMAIL PROTECTED] wrote: · maxim wexler [EMAIL PROTECTED]: One suggests using -O3 -pipe, the other, -O2 without the pipe. The resulting binaries of a -O2 -pipe compile will be the same as those of a -O2 (no pipe) compile. See http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Overall-Options.html#index-pipe-81 How much difference does this make? Is the extra level of optimization with pipe the equivalent of the lower level without? There's no extra level of optimization. So the question boils down to: Is -O3 better than -O2? Answer: Depends. On a system with not that much cache, it might not be. Alexander Skwar -- BOFH Excuse #16: somebody was calculating pi on the server -- gentoo-user@gentoo.org mailing list -- ['Cause without love I won't survive, I love you]. I Francisco Rivas 2.6.19-gentoo-r5 x86 udev v087 gnome 2.16.2 xorg-x11-7.1 hotplug v20040923-r2 e-mail : [EMAIL PROTECTED] msn : [EMAIL PROTECTED] -BEGIN GEEK CODE BLOCK- Version: 3.1 GCS/E/IT/MU d-(+)@ s++: a-- C ULSC*()+++ P+(++)+++ L++(+++) !E--- W+++ !N* !o-(--)-- K--? !w--- !O !M !V PS@ !PE@ Y PGP t 5 X R++ tv- b DI D G e+ h- r+ y- --END GEEK CODE BLOCK--
