升級GCC之一帆風順版

升級GCC步驟：gmp->mpfr->mpc->GCC
環境
VM：VMware Player 5.0
OS：CentOS（6.5 2.6.32-431.el6.i686）
GCC:4.4.7 --> 4.8.2

GCC來源：載點

安裝步驟

# gcc --version
  gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-4)
  Copyright (C) 2010 Free Software Foundation, Inc.
  This is free software; see the source for copying conditions. There is NO
  warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

# yum install -y gcc-c++
# mkdir -p /data/src
# cd /data/src
# curl -R -O ftp://gnu.mirror.iweb.com/gcc/gcc-4.8.2/gcc-4.8.2.tar.gz
# tar zxf gcc-4.8.2.tar.gz
# cd gcc-4.8.2

# ./contrib/download_prerequisites　//安裝gmp、mpfr、mpc
# cd ..

# mkdir build_gcc482
# cd build_gcc482
# ../gcc-4.8.2/configure --enable-checking=release --enable-languages=c,c++ --disable-multilib
# make
# make install

# gcc --version
  gcc (GCC) 4.8.2
  Copyright (C) 2013 Free Software Foundation, Inc.
  This is free software; see the source for copying conditions. There is NO
  warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.


測試

# vim helloworld.c
  #include
  int main(void){
  printf("hello world. \n");
  return 0;
  }
# gcc helloworld.c
# ls
  a.out helloworld.c
# ./a.out
  hello world.