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I'm new to Ubuntu. I downloaded a python module graph-tool-2.22 . After I command in graph-tool-2.22 directory

./configure
, it causes configure error.
$ ./configure
....blah
....blah
checking whether g++ supports C++14 features by default... no
checking whether g++ supports C++14 features with -std=gnu++14... no
checking whether g++ supports C++14 features with -std=gnu++1y... no
configure: error: *** A compiler with support for C++14 language features is required.
It says that c++14 is required, however, of course I have g++ (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4 in my computer. What is the problem?
                Double check your g++ in the console: g++ -v. Your version should work with param -std=gnu++1y according to this.
– sascha
                Aug 4, 2017 at 16:01
Your version of gcc does not seem to have support for C++14 that graph-tool-2.22 need.
As mentioned in the gcc site in section C++14 Language Features, full support for C++14 is in gcc 5, with reasonable amount of features also available gcc 4.9. 
You might like to upgrade to gcc 5 , perhaps by upgrading to Ubuntu 16.04. Ubuntu 14.04 is old 
        
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