Linux how to configure the C++11 compilation environment

Configuration yum source

Here we use the yum source for 163, configured as follows

Backup/etc/first yum. repos. d/CentOS - Base. repo

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

Download the corresponding version repo file, put/etc/yum repos. d/please prepare accordingly before operation (backup), the following link for download

https://mirrors.163.com/.help/CentOS6-Base-163.repo

Run the following command to generate the yum cache

yum clean all
yum makecache

Use yum to configure the c++ compile environment

Once yum is configured, configure c++ build environment commands as follows

yum -y install gcc gcc-g++

The c++ environment is ready to be configured once the installation is complete.

Write an hello worl code as follows

#include<iostream>

using namespace std;
int main()
{
	cout<<"Hello World!"<<endl;
	return 0;
}

Save the file named aa.cpp with c++ and do the following

g++ -o hello aa.cpp
./aa.cpp

Source code compilation installation c++11 compilation environment

Because yum comes with a low version of gcc, and c++11 requires es60EN4.8 or above, you need to download gcc4.8 or above to support c++11

View the local VERSION of gcc

gcc -v

This version is gcc version 4.4.7 20120313 (Red Hat 4.4.7-17) (GCC)

Get source code of gcc4.8.2

The source code is placed in the src directory by default

cd /usr/local/src
wget http://gcc.skazkaforyou.com/releases/gcc-4.8.2/gcc-4.8.2.tar.gz

The file has 100M, the download speed of foreign websites is very slow, please wait patiently (foreign vps can be downloaded and transferred)

When the download is complete, place it under /usr/local/src

unzip

tar -zxvf gcc-4.8.2.tar.gz

Compile the source and install it

Go to the gcc directory

cd gcc-4.8.2

Download the configuration to install the dependent libraries for ES99en4.8.2

./contrib/download_prerequisites

Create a compile output directory

Execute under the current path

yum clean all
yum makecache

0

Start configure

yum clean all
yum makecache

1 --enable-languages Indicates that you want your gcc to support those languages --disable-multilib Do not generate cross-compilers that are compiled into executable code for other platforms --disable-checking The generated compiler does no extra checking during compilation

compile

Compile the output directory gcc-build-4.8.2 directly make

yum clean all
yum makecache

2

The source make process takes a long time, usually more than half an hour.

The installation

make install

Verify that the upgrade was successful

use which gcc Check the gcc installation up to use gcc -v Check the version. If it hasn't changed, close the current session and reconnect to see if it has changed to 4.8.2. If it hasn't changed, you need to restart the system

Verify that the C++11 program is available

The lambda expression is a new feature of C++11. The following procedure verifies that c++11 is available

Reference: http: / / en. cppreference. com w/cpp/container/array

yum clean all
yum makecache

4

Validation method

yum clean all
yum makecache

5

If g++ is used, it is not added -std=c++11 Parameter, an error will be reported, as follows

yum clean all
yum makecache

6

Update the gcc dynamic link library

Source compile after upgrade install gcc compiler or run other programs, can appear sometimes similar/usr lib64 / libstdc + +. so. 6: versionGLIBCXX_3. 4.18 'not found problem. This is because when upgrading gcc, the dynamic library generated did not replace the dynamic library of the old version of gcc. It can be solved by replacing the dynamic library of the old version of gcc with the dynamic library of the latest version of gcc. Please refer to the following links

http://itbilu.com/linux/management/NymXRUieg.html