Re: [gentoo-user] Upgrading gcc from 6.4 to 7.3

[gevisz <gevisz@gmail.com>]

2018-07-24 22:00 GMT+03:00 gevisz <gevisz@gmail.com>:
> 2018-06-20 14:16 GMT+03:00 Mick <michaelkintzios@gmail.com>:
>> On Wednesday, 20 June 2018 11:43:32 BST gevisz wrote:
>>> After updating portage tree today, portage
>>> suggested to upgrade gcc from 6.4 to 7.3
>>> version what I have done just now.
>>>
>>> Nevertheless,
>>> # gcc-config --list-profiles
>>>  [1] x86_64-pc-linux-gnu-6.4.0 *
>>>  [2] x86_64-pc-linux-gnu-7.3.0
>>> shows that I still have version 6.4 as a default.
>>
>> I'm on gcc-7.3.0-r3 and have not noticed any problems on 3 boxen so far.
>>
>>
>>> As https://wiki.gentoo.org/wiki/Upgrading_GCC
>>> still do not have any specific instructions on
>>> switching to gcc version 7.3, I am still afread
>>> of switching to gcc version 7.3 and would like
>>> to ask if anybody encountered some problem
>>> after switching to gcc version 7.3 and which
>>> packages should be rebuild after such switching.
>>>
>>> Thank you in advance for your help.
>>
>> I didn't have to rebuild anything, but if you have reasons to fear breakage
>> you can rebuild your toolchain:
>>
>> 1. Use gcc-config to select x86_64-pc-linux-gnu-7.3.0
>> 2. Re-source /etc/profile by running in your current console/terminal:
>>     . /etc/profile
>> 3. Re-emerge libtool:
>>     emerge -1 sys-devel/libtool
>> 4. Re-emerge the following packages in this order:
>>     emerge -1 sys-devel/gcc-7.3.0-r3
>>     emerge -1 sys-devel/binutils
>>     emerge -1 sys-libs/glibc
>> 5. You could if you want re-emerge your entire system, 'emerge -e @world' or
>> if you would rather conserve electricity wait as different packages come up
>> for an update over time.
>>
>> If my experience to date holds true and for a general purpose desktop none of
>> the above rebuilds are necessary, other than switching your gcc to 7.3.0.
>
> You forgot the 6th item:
>
> 6. Recompile the kernel.
>
> Just today, virtualbox-modules refused to compile because of this.
> Thanks to Michael Orlitzky for the tip how to interpret portage messages.

By the way, this recommendation is absent from Gentoo wiki on updating gcc.