Re: [gentoo-user] Building media-libs/lcms-2.6-r1 failed

[Gevisz <gevisz@gmail.com>]

On Wed, 29 Oct 2014 19:25:20 +0200 Alexander Kapshuk <alexander.kapshuk@gmail.com> wrote:

> On Wed, Oct 29, 2014 at 6:05 PM, Gevisz <gevisz@gmail.com> wrote:
> > After today's # emerge-webrsyc
> > # emerge --update --deep --with-bdeps=y --newuse --backtrack=90 --ask world
> > failed with the following message:
> >
> > These are the packages that would be merged, in order:
> >
> > Calculating dependencies... done!
> > [ebuild     U  ] media-libs/lcms-2.6-r1 [2.5] USE="threads%*" ABI_X86="(64%*) (-32) (-x32)"
> > [ebuild     U  ] net-misc/wget-1.16 [1.14]
> > [ebuild     U  ] media-gfx/imagemagick-6.8.9.9 [6.8.8.10-r1]
> >
<skipped>
> >
> > I think that something may be wrong with sys-devel/gcc-4.8.3 as my problems begun when
> > I have updated it from sys-devel/gcc-4.7.3-r1 this Monday. Namely, just after this only
> > update, # emerge @preserved-rebuild
> > failed to rebuild app-text/pdftk-1.44 that was not updated that time and built well with
> > sys-devel/gcc-4.7.3-r1. Then I recalled that to build app-text/pdftk I had to add gcj use
> > flag to sys-devel/gcc. So, as I am not fond of Java, I just unmerged app-text/pdftk.
> > Bu now it seems that I had to unmerge media-libs/lcms and all packages that depend on it.
> >
> > May be it would be easier to unmerge sys-devel/gcc-4.8.3 and return back to
> > sys-devel/gcc-4.7.3-r1 but I do not know how to do it properly.
> >
> 
> Did you remember to run 'gcc-config -f 1' after updating gcc as root?

No, I did not remember to run 'gcc-config -f 1' because I never knew that it should be done
and no portage message advised me to do so.  `man gcc' or `man gcc-config' also report that
there is no manual on these packets. Gentoo's Upgrading GCC wiki also says nothing about
this command...

> What's the output of 'gcc-config -l'?

# gcc-config -l
 * gcc-config: Active gcc profile is invalid!

 [1] x86_64-pc-linux-gnu-4.8.3

Nice!

Ok, trying # gcc-config -f 1
 * Switching native-compiler to x86_64-pc-linux-gnu-4.8.3 ...
>>> Regenerating /etc/ld.so.cache...                                                                                                                            [ ok ]

 * If you intend to use the gcc from the new profile in an already
 * running shell, please remember to do:

 *   . /etc/profile


What exactly shall I remember to do? 

Ok, # gcc-config -l 
 [1] x86_64-pc-linux-gnu-4.8.3 *

Now # emerge --update --deep --with-bdeps=y --newuse --backtrack=90 --ask world
emerges all three above packages.

Trying to emerge pdftk. Done.

Ok. Thank you. But why there was no hint about it after updating gcc?

Well, there was a reference to Gentoo's Upgrading GCC wiki
but nothing more...