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JWood48
n00b
Joined: 14 Feb 2003
Posts: 2
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 Posted: Mon Mar 10, 2003 9:51 pm Post subject: gcc 2.95.x and 3.2.2 |
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Hi
I have gcc-3.2.2 installed and it's working fine, but i also need gcc-2.95.3. I have looked trough the discussion forums and found that i should:
| Code: | | emerge sys-devel/gcc-2.95.3-r8.ebuild |
and choose the gcc-version with gcc-config.
When i try emerge -p i get:
| Code: |
emerge -p sys-devel/gcc-2.95.3-r8.ebuild
These are the packages that I would merge, in order:
Calculating dependencies ...done!
[ebuild U ] sys-devel/gcc-2.95.3-r8 [3.2.2-r1]
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Its the update tag i'm worried about... will this permanently switch the compilerversion to 2.95* or should i first emerge gcc 2.95* and then emerge gcc 3.2* again or can everything be done from gcc-config.... I dont want my system to start compiling new programs with gcc-2.95* by default.
I just need gcc-2.95* on special compilerjobs and gcc-3.2.2 should be the default for my system.
BTW. GENTOO ROCKS  |
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cederberg
Guru
Joined: 23 Jan 2003
Posts: 349
Location: Stockholm / Sweden
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| Posted: Mon Mar 10, 2003 10:08 pm Post subject: |
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I think that gcc uses different slots for gcc 2.x and 3.x, so you should be safe. See http://forums.gentoo.org/viewtopic.php?p=230621#230621 for some discussion on this.
I havn't been able to find a good discussion about which packages uses slots, but there is a short mentioning of the concept in the Portage Manual. |
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ebrostig
Bodhisattva
Joined: 20 Jul 2002
Posts: 3152
Location: Orlando, Fl
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| Posted: Mon Mar 10, 2003 10:09 pm Post subject: |
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You can safely emerge 2.9.5.3.
I have both versions installed on my machine and I have set 3.2.2 as the default one.
When you need to compile an application with 2.95, all you have to do is:
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gcc-config i686-pc-linux-gnu-2.95.3
env-update && source /etc/profile
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Then when you are done, swicth back with:
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gcc-config i686-pc-linux-gnu-3.2.2
env-update && source /etc/profile
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Hope this helps.
Erik
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JWood48
n00b
Joined: 14 Feb 2003
Posts: 2
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| Posted: Tue Mar 11, 2003 12:13 am Post subject: |
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Thanks
Its working now with both gcc's  |
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Woollhara
n00b
Joined: 19 Jun 2002
Posts: 55
Location: London, UK
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| Posted: Sat Mar 15, 2003 10:17 am Post subject: Re-compiling GCC 2.95 with itself? |
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Hi
I have GCC 3.2.2 installed and need 2.95 as well.
My question is:
If I emerge GCC 2.95 it will be compiled with GCC 3.2.2. Does that mean I then need to switch to GCC 2.95 and re-emerge it so it gets compiled with itself (a bit like stage 1)? Or can I safely use it after it's compiled with GCC 3.2.2?
Thanks
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cederberg
Guru
Joined: 23 Jan 2003
Posts: 349
Location: Stockholm / Sweden
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| Posted: Sun Mar 16, 2003 7:57 am Post subject: Re: Re-compiling GCC 2.95 with itself? |
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| Woollhara wrote: | | If I emerge GCC 2.95 it will be compiled with GCC 3.2.2. Does that mean I then need to switch to GCC 2.95 and re-emerge it so it gets compiled with itself (a bit like stage 1)? Or can I safely use it after it's compiled with GCC 3.2.2? |
I havn't tried this myself, but I'm almost certain you can use it directly. The reason for gcc being compiled twice in the bootstrap is to take advantage of the fresh glibc (and friends), and also making sure that is gets compiled with your optimization settings (the first compile only uses some of them IIRC). |
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rac
Bodhisattva
Joined: 30 May 2002
Posts: 6553
Location: Japanifornia
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| Posted: Sun Mar 16, 2003 11:20 pm Post subject: Re: Re-compiling GCC 2.95 with itself? |
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| Woollhara wrote: | | Does that mean I then need to switch to GCC 2.95 and re-emerge it so it gets compiled with itself (a bit like stage 1)? |
No, do not worry about this. The gcc compilation process is multi-staged, and by the time the stage3 compiler (the one you will be using) is built, no trace of the compiler that started the process (3.2.2 in your case) is left. Your 2.95.3 will have been compiled by itself.
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Sargon
Tux's lil' helper
Joined: 23 Jan 2003
Posts: 90
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| Posted: Tue May 20, 2003 10:05 pm Post subject: |
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Hi
I tried to install gcc 2.95.x according to the description in the first post by JWood48. (I added '-p' to just pretend, but I get the same result w/o it too)
But when I execute the command
| Code: | | emerge -p sys-devel/gcc-2.95.3-r8.ebuild |
as root, I get the following error:
| Code: |
These are the packages that I would merge, in order:
Calculating dependencies \!!! aux_get(): ebuild for 'root/gcc-2.95.3-r8' does not exist at:
!!! /usr/portage/root/gcc/gcc-2.95.3-r8.ebuild
emerge: create(): aux_get() error on root/gcc-2.95.3-r8; aborting...
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Why is it trying to access /usr/portage/root/... ?
However, when I first cd to /usr/portage/sys-devel, it works:
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sinan root # cd /usr/portage/sys-devel/
sinan sys-devel # emerge -p sys-devel/gcc-2.95.3-r8.ebuild
These are the packages that I would merge, in order:
Calculating dependencies ...done!
[ebuild U ] sys-devel/gcc-2.95.3-r8 [3.2.2]
sinan sys-devel #
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What am I missing?
Sargon |
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phunni
Apprentice
Joined: 05 May 2003
Posts: 217
Location: Bristol, UK
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| Posted: Fri May 30, 2003 3:26 pm Post subject: |
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I also struggled with this issue - I think it's becuase you are pointing directly to the ebuild, so you have tyo be in the correct place.
An emerge using the app anme will work from anyway, but if you are pointing to the ebuild then you need to be in a location relative to the ebuild path you supply
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