[Centos]升级安装GCC

摘要

在尝试运行asp.net core站点的时候，发现了gcc包版本太低，造成一些错误。没办法只能升级gcc了。

升级

最新包：http://gcc.parentingamerica.com/releases/gcc-6.2.0/gcc-6.2.0.tar.bz2

下载

wget http://gcc.parentingamerica.com/releases/gcc-6.2.0/gcc-6.2.0.tar.bz2

gcc安装文件下载完成后，执行以下命令解压文件：

tar -xf gcc-6.2..tar.bz2

下载gcc依赖库和文件

解压完成后，执行以下命令进入工作目录：

cd gcc-6.2.

执行download_prerequisites脚本，下载gcc依赖文件和库：

./contrib/download_prerequisites

ownload_prerequisites脚本，会下载安装gcc所需的mpfr、gmp和mpc文件。

[root@localhost gcc-6.2.]# ./contrib/download_prerequisites
---- ::--  ftp://gcc.gnu.org/pub/gcc/infrastructure/mpfr-2.4.2.tar.bz2
           => “mpfr-2.4..tar.bz2”
Resolving gcc.gnu.org... 209.132.180.131
Connecting to gcc.gnu.org|209.132.180.131|:... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.    ==> PWD ... done.
==> TYPE I ... done.  ==> CWD () /pub/gcc/infrastructure ... done.
==> SIZE mpfr-2.4..tar.bz2 ...
==> PASV ... done.    ==> RETR mpfr-2.4..tar.bz2 ... done.
Length:  (1.0M) (unauthoritative)

%[==========================================================>] ,,   .6K/s   in 24s     

-- :: (44.3 KB/s) - “mpfr-2.4..tar.bz2” saved []

---- ::--  ftp://gcc.gnu.org/pub/gcc/infrastructure/gmp-4.3.2.tar.bz2
           => “gmp-4.3..tar.bz2”
Resolving gcc.gnu.org... 209.132.180.131
Connecting to gcc.gnu.org|209.132.180.131|:... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.    ==> PWD ... done.
==> TYPE I ... done.  ==> CWD () /pub/gcc/infrastructure ... done.
==> SIZE gmp-4.3..tar.bz2 ...
==> PASV ... done.    ==> RETR gmp-4.3..tar.bz2 ... done.
Length:  (1.8M) (unauthoritative)

%[==========================================================>] ,,   .5K/s   in 92s     

-- :: (20.2 KB/s) - “gmp-4.3..tar.bz2” saved []

---- ::--  ftp://gcc.gnu.org/pub/gcc/infrastructure/mpc-0.8.1.tar.gz
           => “mpc-0.8..tar.gz”
Resolving gcc.gnu.org... 209.132.180.131
Connecting to gcc.gnu.org|209.132.180.131|:... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.    ==> PWD ... done.
==> TYPE I ... done.  ==> CWD () /pub/gcc/infrastructure ... done.
==> SIZE mpc-0.8..tar.gz ...
==> PASV ... done.    ==> RETR mpc-0.8..tar.gz ... done.
Length:  (532K) (unauthoritative)

%[==========================================================>] ,     .5K/s   in 19s     

-- :: (27.7 KB/s) - “mpc-0.8..tar.gz” saved []

---- ::--  ftp://gcc.gnu.org/pub/gcc/infrastructure/isl-0.15.tar.bz2
           => “isl-0.15.tar.bz2”
Resolving gcc.gnu.org... 209.132.180.131
Connecting to gcc.gnu.org|209.132.180.131|:... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.    ==> PWD ... done.
==> TYPE I ... done.  ==> CWD () /pub/gcc/infrastructure ... done.
==> SIZE isl-0.15.tar.bz2 ...
==> PASV ... done.    ==> RETR isl-0.15.tar.bz2 ... done.
Length:  (1.5M) (unauthoritative)

%[==========================================================>] ,,   .3K/s   in 30s     

-- :: (51.4 KB/s) - “isl-0.15.tar.bz2” saved []

[root@localhost gcc-6.2.]# 

下载安装过程

配置gcc

建立一个输出目录，编译时所有生成的中间文件都放到该目录下：

mkdir gcc-temp

工作目录切换至输出目录，并在其中执行配置和安装：

cd gcc-temp

执行configure配置安装文件：

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

配置完成后，执行以下命令，编译gcc：

make

编译过程较长，耐心等待。编译完成后，安装gcc：

make install

安装完成后还需要替换系统默认的gcc，执行以下命令，查找6.2版本的安装文件：

ls /usr/local/bin | grep gcc

执行升级命令：

/usr/sbin/update-alternatives --install  /usr/bin/gcc gcc /usr/local/bin/x86_64-pc-linux-gnu-gcc-6.2. 

验证安装

查看版本号

gcc -v

到此说明安装成功了。

参考文章

http://itbilu.com/linux/management/V1vdnt9ll.html