[shell] gcc 版本更新

ienki

使用的 linux 内核支持的 gcc 版本是 4.7 ,并不能全面的支持  c++11 中的新特性，所以手动把 gcc 升级到 4.8 。
gcc 的编译与安装需要依赖三个文件 gmp , mpfr , mpc ， 其中这三个文件之间也有一定的依赖关系 : mpfr 依赖 gmp , mpc 依赖 gmp 和 mpfr .
手动安装之后，把安装过程整理成脚本如下所示:

• #!/bin/sh
  
  
• 
  
• #first create HOMES for new installing softwares store their binary executable files
  
• 
  
• GMP_HOME='/usr/local/gmp-6.0.0'
  
• MPFR_HOME='/usr/local/mpfr-3.2.1'
  
• MPC_HOME='/usr/local/mpc-1.0.3'
  
• GCC_HOME='/usr/local/gcc-4.8.2'
  
• 
  
• 
  
• 
  
• 
  
• #download each source file to the corresponding path
  
• tempfile=`mktemp download.XXXXX`
  
• 
  
• echo 'here we create a file '
  
• 
  
• exec 3>$tempfile
  
• 
  
• echo 'https://ftp.gnu.org/gnu/gmp/gmp-6.0.0a.tar.xz'>&3
  
• 
  
• echo 'http://www.mpfr.org/mpfr-current/mpfr-3.1.2.tar.xz'>&3
  
• 
  
• echo 'ftp://ftp.gnu.org/gnu/mpc/mpc-1.0.3.tar.gz'>&3
  
• 
  
• echo 'http://gcc.skazkaforyou.com/releases/gcc-4.8.2/gcc-4.8.2.tar.gz'>&3
  
• 
  
• echo 'here we begin download corresponding files'
  
• 
  
• wget -i download.*
  
• 
  
• 
  
• rm -f download.*
  
• 
  
• 
  
• #decompression each source file package
  
• 
  
• tar -xzf gcc-4.8.2.tar.gz &&
  
• 
  
• tar -xzf mpc-1.0.3.tar.gz &&
  
• 
  
• xz -d mpfr-3.1.2.tar.xz &&
  
• 
  
• xz -d gmp-6.0.0a.tar.xz
  
• 
  
• tar -xvf mpfr-3.1.2.tar &&
  
• tar -xvf gmp-6.0.0a.tar
  
• 
  
• rm -f *.tar.gz
  
• 
  
• 
  
• #create directory for each binary executable files store
  
• #/usr/local/ is preferred optional main directory branch
  
• 
  
• mkdir $GMP_HOME &&
  
• mkdir $MPFR_HOME &&
  
• mkdir $MPC_HOME &&
  
• mkdir $GCC_HOME
  
• 
  
• 
  
• 
  
• #here MPFR depends on GMP library , and MPC depends on
  
• #both GMP and MPFR , so we install GMP first
  
• 
  
•     #set gmp binary file installation path name and other compile info
  
•     /Xshell/gmp-6.0.0/configure --prefix=$GMP_HOME
  
• 
  
•     #run make file and make install
  
•     cd /Xshell/gmp-6.0.0 && make && make install
  
• #-------------------------------------
  
• 
  
•     #set mpc binary file installation path name and other compile options
  
•     /Xshell/mpfr/configure --prefix=$MPFR_HOME --with-gmp=$GMP_HOME
  
• 
  
•     #run make file and make install command
  
•     cd /Xshell/mpfr-1.0.3 && make && make install
  
• #-------------------------------------
  
• 
  
•     #set MPFR binary file installation path name and other dependency options
  
•     /Xshell/mpc/configure --prefix=$MPC_HOME --with-gmp=$GMP_HOME --with-mpfr=$MPFR_HOME
  
• 
  
•     #run make file and make install command
  
•     cd /Xshell/mpc-3.1.2 && make && make install
  
• #-------------------------------------
  
• 
  
• echo 'dependency libraries are installed properly , now let set , compile and install gcc '
  
• 
  
• # here we begin to install gcc library
  
• 
  
• # first and most important is to add new installed three libraries'
  
  
• # path to the /etc/profile , and update /etc/profile this file
  
• 
  
•    echo "export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$GMP_HOME:$MPFR_HOME:$MPC_HOME" | tee -a /etc/profile
  
• 
  
•    source /etc/profile
  
• 
  
• # change directory to gcc package downloaded path
  
• 
  
• #-------------------------------------
  
•     #set binary executable file path
  
• 
  
•         /Xshell/gcc-4.8.2/configure --prefix=$GCC_HOME -enable-threads=posix \
  
•     -disable-checking -disable-multilib -enable-languages=c,c++ \
  
•         --with-gmp=$GMP_HOME --with-mpfr=$MPFR_HOME --with-mpc=$MPC_HOME
  
• 
  
• 
  
•      echo "now we make and make install gcc , patience wait for almost 1 hour"
  
• 
  
•     #make and make install
  
•      cd /Xshell/gcc-4.8.2 && make && make install
  
• 
  
•     #update the soft-link gcc and g++ in directory /usr/bin/
  
•     mv /usr/bin/gcc /usr/bin/gcc47
  
•     mv /usr/bin/g++ /usr/bin/gpp47
  
• 
  
•     ln -s $GCC_HOME/bin/gcc  /usr/bin/gcc
  
•     ln -s $GCC_HOME/bin/g++  /usr/bin/g++
  
• 
  
• 
  
• #-------------------------------------
  
• 
  
• #finally , check whether gcc is updated successfully
  
• echo 'here we check version of the current gcc
  
• g++ -v
  

运行之记得前要 chmod 755 一下

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