Installing newer GCC versions in Ubuntu - Revision history

Daniel at 11:49, 6 March 2018

2018-03-06T11:49:39Z

Daniel at 11:01, 6 March 2018

2018-03-06T11:01:50Z

Daniel: Created page with "

 $ sudo apt-get install gcc g++ gcc-5 g++-5 gcc-6 g++-6 gcc-7 g++-7

 $ sudo update-alternatives --remove-all gcc

 $ sudo update-alternatives --..."

2017-11-23T19:56:39Z

Created page with " <pre> $ sudo apt-get install gcc g++ gcc-5 g++-5 gcc-6 g++-6 gcc-7 g++-7 </pre> <pre> $ sudo update-alternatives --remove-all gcc </pre> <pre> $ sudo update-alternatives --..."

New page

<pre>
$ sudo apt-get install gcc g++ gcc-5 g++-5 gcc-6 g++-6 gcc-7 g++-7
</pre>

<pre>
$ sudo update-alternatives --remove-all gcc
</pre>

<pre>
$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 90 --slave /usr/bin/g++ g++ /usr/bin/g++-5
$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-6 80 --slave /usr/bin/g++ g++ /usr/bin/g++-6
$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 70 --slave /usr/bin/g++ g++ /usr/bin/g++-7
</pre>

<pre>
$ sudo update-alternatives --config gcc
</pre>

<pre>
There are 3 choices for the alternative gcc (providing /usr/bin/gcc).

Selection Path Priority Status
------------------------------------------------------------
* 0 /usr/bin/gcc-5 90 auto mode
1 /usr/bin/gcc-5 90 manual mode
2 /usr/bin/gcc-6 80 manual mode
3 /usr/bin/gcc-7 70 manual mode

Press <enter> to keep the current choice[*], or type selection number: 3
update-alternatives: using /usr/bin/gcc-7 to provide /usr/bin/gcc (gcc) in manual mode
</pre>

<pre>
$ g++ -v
....
gcc version 7.2.0 (Ubuntu 7.2.0-1ubuntu1~16.04)
</pre>

@@ Line 17: / Line 17: @@
 </pre>
-Which can show the error ''update-alternatives: error: no alternatives for gcc'' if no previous alternatives were configured.
+Which can show the error ''update-alternatives: error: no alternatives for gcc'' if no previous alternatives were configured. The configure the alternatives modifying it accordingly to the versions available on your system. Each alternative has a priority associated with it. When a link group is in automatic mode, the alternatives pointed to by members of the group will be those which have the highest priority.
 <pre>
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 </pre>
 <pre>
 $ sudo update-alternatives --config gcc
 </pre>
 <pre>
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 update-alternatives: using /usr/bin/gcc-7 to provide /usr/bin/gcc (gcc) in manual mode
 </pre>
 <pre>