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Jojobinha_2009
Tux's lil' helper
Joined: 27 Mar 2021
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Location: Brazil
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 Posted: Thu Apr 08, 2021 10:30 pm Post subject: Is upgrading GCC really this simple? |
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Just updated my machine to GCC 10.3.0...
However I didn't need to do anything different apparently...
It automatically changed the GCC profile and apparently deleted all traces from GCC 10.2.
Is it really this easy?
I used | Code: | | emerge -auUD @world |
to do the upgrade.
Corrected the emerge command, its -auUD not -aaUD. Sorry.
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Last edited by Jojobinha_2009 on Fri Apr 09, 2021 10:25 pm; edited 1 time in total |
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Ionen
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| Posted: Thu Apr 08, 2021 10:34 pm Post subject: |
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In this case it's not a different slot (unlike gcc9) and just a simple upgrade, so yes.
Formerly gcc would use different slots for every versions (e.g. :9.2.0, then :9.3.0, etc..) but gcc:10 (and later :11) notably started using only one with the major version for simplicity. |
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figueroa
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| Posted: Fri Apr 09, 2021 3:11 am Post subject: Re: Is upgrading GCC really this simple? |
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| Jojobinha_2009 wrote: | ...
I used | Code: | | emerge -aaUD @world |
to do the upgrade. |
Did you really use -aa? What does that do?
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Andy Figueroa
hp pavilion hpe h8-1260t/2AB5; spinning rust x3
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Hu
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| Posted: Fri Apr 09, 2021 3:57 am Post subject: |
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That would be --ask --ask. Presumably, it enables Are-You-Really-Really-Sure mode.  (It probably is the same as --ask.) |
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luna80
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NeddySeagoon
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| Posted: Fri Apr 09, 2021 7:55 am Post subject: |
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Jojobinha_2009,
gcc upgrades vary. Going from 10.2 to 10.3 does not introduce any incompatibilities, so its as easy as you suggest.
A major version update, say from 10.x to 11.x, it allowed to break backwards compatibility.
There would be a news item about that, describing what you need to do to fix it.
e.g. There has been at least one C++ ABI change. That requires rebuilding all the C++ code installed.
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those that do backups
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CaptainBlood
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Joined: 24 Jan 2010
Posts: 4006
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| Posted: Fri Apr 09, 2021 12:03 pm Post subject: |
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Shrinked my kernel by 2Kb as well. 
Me happy! 
Thks 4 ur attention, interest & support.
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Jojobinha_2009
Tux's lil' helper
Joined: 27 Mar 2021
Posts: 77
Location: Brazil
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| Posted: Fri Apr 09, 2021 10:26 pm Post subject: Re: Is upgrading GCC really this simple? |
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| figueroa wrote: | | Jojobinha_2009 wrote: | ...
I used | Code: | | emerge -aaUD @world |
to do the upgrade. |
Did you really use -aa? What does that do? |
I mistyped it 
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Intel Core i5-9400F / 24GB DDR4 2666MHz / GeForce GTX 1060 3GB
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Jojobinha_2009
Tux's lil' helper
Joined: 27 Mar 2021
Posts: 77
Location: Brazil
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| Posted: Fri Apr 09, 2021 10:29 pm Post subject: |
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I did, this is why I found it strange that I didn't need to do anything special.
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Ionen
Developer
Joined: 06 Dec 2018
Posts: 2919
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| Posted: Fri Apr 09, 2021 11:33 pm Post subject: |
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| Jojobinha_2009 wrote: | | I did, this is why I found it strange that I didn't need to do anything special. |
Yeah, this guide is more intended for back when had separate slots even for non-major versions.
It'll have some degree of relevance when upgrade to gcc:11 but major upgrades aren't very common (that one isn't even released yet and just seeing some testing from git).
On that note, do make sure you have the right gcc selected. I keep gcc11 around for testing myself and upgrading to 10.3.0 caused it to auto-select gcc11 and had me wondering why I was getting gcc11-specific build failures when I don't want to use it  No worries if you only have 1 gcc though. |
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