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LoTeK
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PostPosted: Wed Jan 09, 2013 9:26 am    Post subject: [solved]emerge --depclean deleted gcc-4.6.3 Reply with quote

hi,
in the morning i ran:
Code:
emerge --update --deep --with-bdeps=y world
emerge --depclean
revdep-rebuild
and updated gcc. But depclean removed the older version 4.6.3 (I read that one has to be cautious with emerge --depclean and I guess it was rather stupid to let depclean remove gcc :) but I don't understand why, because emerge --update --deep world installed the new version..!?)

Now I can't compile packages and at the moment even worse I can't compile my C-programs, I've tried to reinstall gcc-4.6.3 but it doesn't compile, what can I do now?

output of gcc-config -l:
Code:
 * gcc-config: Active gcc profile is invalid!

 [1] x86_64-pc-linux-gnu-4.6.3
 [2] x86_64-pc-linux-gnu-4.6.3-hardenednopie
 [3] x86_64-pc-linux-gnu-4.6.3-hardenednopiessp
 [4] x86_64-pc-linux-gnu-4.6.3-hardenednossp
 [5] x86_64-pc-linux-gnu-4.6.3-vanilla


error message:
Code:
configure: error: in `/var/tmp/portage/sys-devel/gcc-4.6.3/work/build':
configure: error: C compiler cannot create executables
See `config.log' for more details.
 * ERROR: sys-devel/gcc-4.6.3 failed (compile phase):
 *   failed to run configure
 *
 * Call stack:
 *     ebuild.sh, line   93:  Called src_compile
 *   environment, line 4073:  Called toolchain_src_compile
 *   environment, line 4729:  Called gcc_do_configure
 *   environment, line 2302:  Called die
 * The specific snippet of code:
 *       "${S}"/configure "$@" || die "failed to run configure";
 *
 * If you need support, post the output of `emerge --info '=sys-devel/gcc-4.6.3'`,
 * the complete build log and the output of `emerge -pqv '=sys-devel/gcc-4.6.3'`.
 *
 * Please include /var/tmp/portage/sys-devel/gcc-4.6.3/work/build/gcc-build-logs.tar.bz2 in your bug report
 *
 * The complete build log is located at '/var/tmp/portage/sys-devel/gcc-4.6.3/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sys-devel/gcc-4.6.3/temp/environment'.
 * Working directory: '/var/tmp/portage/sys-devel/gcc-4.6.3/work/build'
 * S: '/var/tmp/portage/sys-devel/gcc-4.6.3/work/gcc-4.6.3'

>>> Failed to emerge sys-devel/gcc-4.6.3, Log file:

>>>  '/var/tmp/portage/sys-devel/gcc-4.6.3/temp/build.log'

 * Messages for package sys-devel/gcc-4.6.3:

 *
 * LTO support is still experimental and unstable.
 * Any bugs resulting from the use of LTO will not be fixed.
 *
 * ERROR: sys-devel/gcc-4.6.3 failed (compile phase):
 *   failed to run configure
 *
 * Call stack:
 *     ebuild.sh, line   93:  Called src_compile
 *   environment, line 4073:  Called toolchain_src_compile
 *   environment, line 4729:  Called gcc_do_configure
 *   environment, line 2302:  Called die
 * The specific snippet of code:
 *       "${S}"/configure "$@" || die "failed to run configure";
 *
 * If you need support, post the output of `emerge --info '=sys-devel/gcc-4.6.3'`,
 * the complete build log and the output of `emerge -pqv '=sys-devel/gcc-4.6.3'`.
 *
 * Please include /var/tmp/portage/sys-devel/gcc-4.6.3/work/build/gcc-build-logs.tar.bz2 in your bug report
 *
 * The complete build log is located at '/var/tmp/portage/sys-devel/gcc-4.6.3/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/sys-devel/gcc-4.6.3/temp/environment'.
 * Working directory: '/var/tmp/portage/sys-devel/gcc-4.6.3/work/build'
 * S: '/var/tmp/portage/sys-devel/gcc-4.6.3/work/gcc-4.6.3'


if I try to compile a program:
Code:
neo@M2-01 ~ $ gcc truthtable.c -o truthtable -std=gnu99
 * gcc-config: Could not get portage CHOST!
 * gcc-config: You should verify that CHOST is set in one of these places:
 * gcc-config:  - //etc/portage/make.conf
 * gcc-config:  - active environment
gcc-config: error: could not get compiler binary path: No such file or directory


Last edited by LoTeK on Wed Jan 09, 2013 10:44 am; edited 1 time in total
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LoTeK
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PostPosted: Wed Jan 09, 2013 10:40 am    Post subject: Reply with quote

well I just tried
Code:
gcc-config -f 1
and it worked.. now I can compile again, but I don't really understand why, so solved, but if anyone could explain it would be appreciated :)

Last edited by LoTeK on Wed Jan 30, 2013 10:18 pm; edited 1 time in total
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Lupin_the_3rd
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PostPosted: Fri Jan 18, 2013 1:45 am    Post subject: Reply with quote

gcc-config will show a * next to the active profile. You have to manually select a profile using gcc-config. So if you upgraded gcc and removed the old version and did not select a new profile in between, you'll get the error that you did.
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Pindrop
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PostPosted: Wed Jan 30, 2013 5:45 pm    Post subject: Reply with quote

LoTeK wrote:
well I just tried
Code:
gcc -config -f 1
and it worked.. now I can compile again, but I don't really understand why, so solved, but if anyone could explain it would be appreciated :)
Awesome, this solution worked for me too. Minor note: there is a space between gcc and -config that shouldn't be there. :twisted:
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LoTeK
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PostPosted: Wed Jan 30, 2013 10:18 pm    Post subject: Reply with quote

Did you have the same problem?
oh yes, sorry :oops:, I corrected the mistake, now he lives only in your quote :)
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Allan Wegan
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PostPosted: Sat Feb 09, 2013 9:53 am    Post subject: Reply with quote

"gcc-config 1" worked for me (did not had to force it *g*).

But surely, that could have been handled better from a usability-point-of-view. Its not that i had expected the regular update procedure (and "emerge --depclean" is recommended by emerge after @world updates) to break the following revdep-rebuild...

Maybe, unmerging software currently "selected" to be used (especially by portage itself!) should not be that easy (it's almost automatic now). There should be a hint, that the package is in use and how to change that. In the case of gcc it should mention use of gcc-config to select another version and refuse to unmerge the currently selected one.

And of course, "emerge --depclean" should know about packages currently in use and not suggest their removal (at least for the packages needed by portage itself).
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Jaglover
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PostPosted: Sat Feb 09, 2013 10:08 am    Post subject: Reply with quote

http://www.gentoo.org/doc/en/gcc-upgrading.xml
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Anon-E-moose
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PostPosted: Sat Feb 09, 2013 11:15 am    Post subject: Reply with quote

when in doubt, run emerge and depclean with the -p flag
BEFORE actually emerging or deleting. Yes it takes a little more time
but saves much aggravation.
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Allan Wegan
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PostPosted: Sat Feb 09, 2013 7:40 pm    Post subject: Reply with quote

Anon-E-moose wrote:
when in doubt, run emerge and depclean with the -p flag
BEFORE actually emerging or deleting. Yes it takes a little more time
but saves much aggravation.


I did use emerge -vatDuN and therefore saw, that gcc was about to be updated along with 30+ other packages. I even added the new and default-deselected cups use flag, introduced in some packages, to my make.conf avoiding breaking the printing functionality. I also researched udev and decided to just disable that use flag where it got newly introduced - do not know, if that will break something or not as i just did not find enough information about it (but had a bad feeling about udev trying to sneak into the GPU driver. Looks like udev is building up dependencies to make itself indispensable before becomming unseparateable from systemd)...

I saw the old gcc in the depclean list afterwards and thought "well, i just upgraded -> the old one is no longer needed".
I use Gentoo for only two years now and never used gcc-config before. The encountered behaviour was surprising and showed just once again that updating Gentoo is a lot more risky than updating other Distributions.

I really like Gentoo and will stay with it. Only wished updates would be less surprising.
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