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use gcc 5.x on ubuntu 14.04
sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install gcc-5 g++-5
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 60 --slave /usr/bin/g++ g++ /usr/bin/g++-5
@vineeshvs
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vineeshvs commented Jun 25, 2016

sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 1

to set first priority to gcc-5

@hallahan
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hallahan commented Sep 19, 2016

👍

@Antttooon
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Antttooon commented Oct 18, 2016

спасибо =)

@MagnetonBora
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MagnetonBora commented Feb 3, 2017

Thanks 👍

@rrogers
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rrogers commented Apr 24, 2017

This works!

@dtamez
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dtamez commented Jun 8, 2017

Thanks :)

@benzkji
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benzkji commented Jun 24, 2017

still works for me on ubuntu 17 / zesty. ppa is not even needed!

@paomian
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paomian commented Sep 11, 2017

gcc7

sudo add-apt-repository ppa:jonathonf/gcc-7.1
sudo apt-get update
sudo apt-get install gcc-7 g++-7

sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 60 --slave /usr/bin/g++ g++ /usr/bin/g++-7

@NorimasaNabeta
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NorimasaNabeta commented Jan 30, 2018

thx

@bryceschober
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bryceschober commented Mar 5, 2018

WARNING @beci @vineeshvs @hallahan @Antttooon @MagnetonBora @rrogers @dtamez @benzkji @NorimasaNabeta:

The ppa:ubuntu-toolchain-r/test has old compiler builds that don't correctly compile some dkms kernel drivers, like nVidia, and you can get your installation pretty broken with the compilers from this PPA. See this launchpad issue for details.

@SeanSyue
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SeanSyue commented Mar 14, 2018

update-alternatives: error:

I'm working on Ubuntu 16.04. The first three code ran properly, but when I was running the code

sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 60 --slave /usr/bin/g++ g++ /usr/bin/g++-5

I got the error:

update-alternatives: error: alternative g++ can't be slave of gcc: it is a master alternative

Can someone answer me what may have gone wrong?

@sg552
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sg552 commented Apr 11, 2018

good job, works , thank you!

@rehmanzafar
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rehmanzafar commented May 14, 2018

Thank you, it worked.

@mathieu-aubin
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mathieu-aubin commented May 17, 2018

fast&clean

kudos

@apoorva-js
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apoorva-js commented Jun 5, 2018

@SeanSyue I'm got the same error as yours. Can you please help me if you figured it out.

@JOELEJAUNE
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JOELEJAUNE commented Jun 7, 2018

thank you

@dongnhzigexn
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dongnhzigexn commented Jul 10, 2018

It works like a charm on Ubuntu 18.04. Thank you 👍

@anandbhaskaran
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anandbhaskaran commented Jul 13, 2018

Thanks

@sahilastangocharlie
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sahilastangocharlie commented Dec 5, 2018

worked .....thanks

@Tectract
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Tectract commented Dec 31, 2018

ppa:ubuntu-toolchain-r/test

seems like it's not being updated or bugfixed properly and could even leave your Ubuntu 14.04 machine in an unbootable state. Beware...

See here a bunch of people breaking their installations of apt-get and gnome by blindly using that repo:

https://askubuntu.com/questions/777803/apt-relocation-error-version-glibcxx-3-4-21-not-defined-in-file-libstdc-so-6#

@Nukemenonai
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Nukemenonai commented Oct 2, 2019

the following error appears when trying to compile using the flag -fsanitize=signed-integer-overflow

/usr/bin/ld: unrecognized option '--push-state--no-as-needed'
/usr/bin/ld: use the --help option for usage information

@aspenstarss
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aspenstarss commented Jan 4, 2021

It's work for me!
Thanks!

@mandardeshmukh03
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mandardeshmukh03 commented Dec 21, 2021

For me this worked:
sudo apt-add-repository "deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu trusty main"
sudo apt-get update
sudo apt-get install gcc-5 g++-5

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