CentOSGCC upgrade tutorial

Recently due to reasons of demand, need to upgrade the current gcc-4.4.4 to gcc-4.6.1, considering there are multiple reasons, made a script automatic installation combined with batch tool distribution. I. installation environment version: centos6.0X64 original GCC version: gcc-4.4.4 new GCC version: gcc-4.6.1 II, formal installation 1, download the installation of source code: the following need to download the following package: gcc-4.6.1.tar.bz2gmp-4.3.2.tar.bz2mpc-0.8.1.tar.g

Recently due to reasons of demand, need to upgrade the current gcc-4.4.4 to gcc-4.6.1, considering there are multiple reasons, made a script automatic installation combined with batch tool distribution.

I. installation environment
System version: centos6.0X64
GCC version: gcc-4.4.4
New GCC: gcc-4.6.1

II. formal installation
1. download and install the source code:

 
 

  
  
The following package needs to be downloaded: gcc-4.6.1.tar.bz2 gmp-4.3.2.tar.bz2 mpc-0.8.1.tar.gz mpfr-2.4.2.tar.bz2
  
  
As follows:
  
  
Wget requests}
  
  
Wget http://ftp.gnu.org/gnu/gcc/gcc-4.6.1/gcc-4.6.1.tar.bz2!
 
 

2. unzip and install the tool in the following sequence: GMP, MPFR, MPC, and GCC.

 
 

  
  
Install GMP: tar jxf gmp-4.3.2.tar.bz2 & cd gmp-4.3.2/;./configure? Prefix =/usr/local/gmp/& make install
 
 

Install MPFR:

 
 

  
  
cd ../ ;tar jxf mpfr-2.4.2.tar.bz2 ;cd mpfr-2.4.2/ ;./configure ?prefix=/usr/local/mpfr ?with-gmp=/usr/local/gmp &&make &&make install
 
 

Install the MPC:

 
 

  
  
cd ../ ;tar xzf mpc-0.8.1.tar.gz ;cd mpc-0.8.1 ;./configure ?prefix=/usr/local/mpc ?with-mpfr=/usr/local/mpfr ?with-gmp=/usr/local/gmp &&make &&make install
 
 

Install GCC:

 
 

  
  
cd ../ ;tar jxf gcc-4.6.1.tar.bz2 ;cd gcc-4.6.1 ;./configure ?prefix=/usr/local/gcc ?enable-threads=posix ?disable-checking ?disable-multilib ?enable-languages=c,c++ ?with-gmp=/usr/local/gmp ?with-mpfr=/usr/local/mpfr/ ?with-mpc=/usr/local/mpc/ &&make &&make install
 
 

Run the following command:

 
 

  
  
export  LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/mpc/lib:/usr/local/gmp/lib:/usr/local/mpfr/lib/
 
 

// This step is critical. if you do not set the variable, an error is returned.

 
 

  
  
Make & make install
  
  

  
  
Installation is complete! Then, make a link to use GCC.
  
  

  
  
Mkdir-p/data/backup/'date + % Y % m % d'
  
  

  
  
Mv/usr/bin/{gcc, g ++}/data/backup/'date + % Y % m % d'
  
  

  
  
Create a soft link:
  
  

  
  
Ln-s/usr/local/gcc/bin/gcc/usr/bin/gcc
  
  

  
  
Ln-s/usr/local/gcc/bin/g ++/usr/bin/g ++
 
 

III. test GCC
Directly enter gcc-v to view the gcc version 4.6.1 and related compilation parameters! Attach a simple installation script:

 
 

  
  
#!/bin/sh   
  
  
##auto make install gcc   
  
  
##2012-07-03   
  
  
tar jxf gmp-4.3.2.tar.bz2 &&cd gmp-4.3.2/ ;./configure ?prefix=/usr/local/gmp/ &&make &&make install    
  
  

  
  
sleep 1    
  
  
cd ../ ;tar jxf mpfr-2.4.2.tar.bz2 ;cd mpfr-2.4.2/ ;./configure ?prefix=/usr/local/mpfr ?with-gmp=/usr/local/gmp &&make &&make install    
  
  

  
  
cd ../ ;tar xzf mpc-0.8.1.tar.gz ;cd mpc-0.8.1 ;./configure ?prefix=/usr/local/mpc ?with-mpfr=/usr/local/mpfr ?with-gmp=/usr/local/gmp &&make &&make install    
  
  

  
  
cd ../ ;tar jxf gcc-4.6.1.tar.bz2 ;cd gcc-4.6.1 ;./configure ?prefix=/usr/local/gcc ?enable-threads=posix ?disable-checking ?disable-multilib ?enable-languages=c,c++ ?with-gmp=/usr/local/gmp ?with-mpfr=/usr/local/mpfr/ ?with-mpc=/usr/local/mpc/    
  
  

  
  
if
  
  
[ $? -eq 0 ];then    
  
  
echo “This gcc configure is success”    
  
  
else
  
  
echo “This gcc configure is failed”    
  
  
fi    
  
  
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/mpc/lib:/usr/local/gmp/lib:/usr/local/mpfr/lib/    
  
  

  
  
make && make install    
  
  

  
  
[ $? -eq 0 ]&&echo This is make install success