Linux/redhat compile install GNU gcc 4.9.0 (g++)

Here is the compilation of installation, Yum/apt-get and other installation methods are relatively simple, do not elaborate.

1, download source package: gcc.gnu.org

2, decompression:

TAR-XJVF gcc-4.9.0.tar.bz2

3 . Download the dependent packages required for compiling:

The simplest way to execute directly:

./contrib/download_prerequisites

Script Automatic Download dependent package GMP, MPFR,MPC. You can also manually download and then move to the/gcc-4.9.0 directory to install it automatically, or compile the installation yourself first

4, execute configure command, produce makefile:

mkdir Build

CD Build

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

Create the build directory first, and compile it into this directory

5, compile

Make-j4

4 indicates the number of threads, long time, faster with multiple threads

6, installation

Make install

question:

C + + compiler missing or inoperational

g++ Command not found

Checking dependency style of g++ ... none

No usable dependency style found

The above problems are due to the system does not have C + + compiler, installed 4.8 or 4.9 before the need to have an ISO c++98 compiler, installed a OK, I really do not know which can install an earlier version of GCC such as 4.4.7

The compilation process is recorded in the Config.log, and there are problems to view the file first.

Google is one of the best ways to solve the problem.