Install gcc-5.3.0 on CentOS 7

原文
http://lightjameslyy.github.io/2016/04/15/Install-gcc-5-3-0-on-CentOS-7/

1.Preparations

operating system: CentOS 7 64bit
old gcc: gcc 4.8.2
source packages: gcc-5.3.0.tar.gz gmp-6.1.0.tar.bz2 mpc-1.0.3.tar.gz mpfr-3.1.3.tar.gz

2.Unzip

change to an appropriate directory (mine is /usr/local) and unzip the 4 packages:

tar -jxvf gmp-6.1.0.tar.bz2

tar -zxvf mpfr-3.1.3.tar.gz

tar -zxvf mpc-1.0.3.tar.gz

tar -zxvf gcc-5.3.0.tar.gz

3.Install

3.1.install gmp

> cd /usr/local/gmp-6.1.0
> ./configure
> make -j2
> make install -j2

NOTICE:

(1) If there are errors such as “Permission denied…”, you need to switch to super user and repeat the process.

(2) The header and library genetated by gmp should already be located under /usr/local/include and /usr/local/lib.

3.2.install mpfr

> cd /usr/local/mpfr-3.1.3
> ./configure --with-gmp-include=/usr/local/include --with-gmp-lib=/usr/local/lib
> make -j2
> make install -j2

3.3.install mpc

> cd /usr/local/mpc-1.0.3
> ./configure
> make -j2
> make install -j2
> export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib

NOTICE:

Don’t forget to change the environment variable $LD_LIBRARY_PATH which is necessary for compiling gcc later.

3.4.install gcc

> cd /usr/local/gcc-5.3.0
> mkdir build
> cd build
> ../configure --prefix=/usr/local/gcc --enable-threads=posix --disable-checking --enable-languages=c,c++ --disable-multilib --with-gmp=/usr/local/lib --with-mpfr=/usr/local/lib --with-mpc=/usr/local/lib
> make -j2
> make install -j2

NOTICE:

while make, I have the following errors:

...[s-attrtab]... ...[all-stage1-gcc]......[stage1-bubble]...

this means you need to add swap partition, I made it by editing
/etc/sysctl.conf

changing

vm.swappiness = 0

to

vm.swappiness = 60

then restart the operating system, continue from make -j2.

4.Remove old version

> yum remove gcc
> yum remove gcc-c++
> updatedb

5.Link to new version

> cd /usr/bin
> ln -s /usr/local/gcc/bin/gcc gcc
> ln -s /usr/local/gcc/bin/g++ g++

6.Add man help

> vim /etc/man_db.conf

add entry:

MANDATORY_MANPATH /usr/local/gcc/share/man

save and exit.

7.Check

> gcc -v

see whether the version is 5.3.0.