Example of how to upgrade gcc in linux

The original intention of GCC was to be a compiler specially written for the GNU operating system. The GNU system is completely free software. Here, "free" means that it respects the user's freedom. This article mainly shares with you examples of how to upgrade gcc in Linux. I hope it can help you.

wget http://ftp.gnu.org/gnu/gcc/gcc-4.8.2/gcc-4.8.2.tar.bz2
tar -jxvf gcc-4.8.2.tar.bz2

Create a directory for storing compiled files

mkdir gcc-build-4.8.2
cd gcc-build-4.8.2

Generate Makefile file

../configure -enable-checking=release -enable-languages=c,c++ -disable-multilib

Compile (note: this step is very time-consuming)

make -j4

make -j4

sudo make install

Restart and check the gcc version gcc -v Write a program segment test.cpp with C++11 features and use shared_ptr

//test.cpp
#include 
#include 
using namespace std;
int main()
{
      shared_ptr pInt(new int(10));
      cout < < *pInt << endl;
      return 0;
}

Verification

g++ -std=c++11 -o test test.cpp
./test

If you cannot find GLIBCXX_3.4.15 in libstdc++.so.6, please execute the following Command

cp /usr/local/lib64/libstdc++.so.6.0.18 /usr/lib64
rm -rf /usr/lib64/libstdc++.so.6
ln -s /usr/lib64/libstdc++.so.6.0.18 /usr/lib64/libstdc++.so.6

to check whether the link is

ll /usr/lib64/libstdc++.so.6
lrwxrwxrwx 1 root root 19  9月 29 12:48 /usr/lib64/libstdc++.so.6 -> libstdc++.so.6.0.18

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