在QT 5.7 Ubuntu上使用GCC 6.3进行编译

Question

I want to use c++14 features so I wanted to use the GCC 6.3 compiler. I've done the list of commands found here

Afterwards, I created a new kit, and used the newly installed xg++ compiler here's the compiler description and added the following in my .pro CONFIG += c++11 c++14

Still the compiler doesn't recognize strings/cout/endl and can't use auto for automatic return type deduction. Also, the binary literals are not recognized.

what I am missing here?

Answer 1

It turns out that it's a bug in Qt Creator not switching to use the given compiler by providing its path in the kit. However, I executed the following steps from terminal:

// Update & Build Essentials & add ppa of the gcc & update again
$ sudo apt-get update
$ sudo apt-get install build-essential software-properties-common -y 
$ sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y  // ppa of gcc 6.3
$ sudo apt-get update
$ sudo apt-get install gcc-snapshot -y
$ sudo apt-get update 

// Install the gcc and Add the gcc as an alternative
$ sudo apt-get install gcc-6 g++-6 -y
$ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-6 60 --slave /usr/bin/g++ g++ /usr/bin/g++-6

// You can switch the gcc verions via
$ sudo update-alternatives --config gcc

and made an alternative to my existing GCC. Once I restored the default kit of Qt creator and set the default GCC to 6.3 instead of 4.8, I was able to run C++14 features with ease provided that CONFIG += c++14 is in the .pro.