Compile gcc 8.2 on ubuntu 18.04.1 LTS

build-gcc-8.2.sh

#!/bin/bash

sudo apt-get -y update
sudo apt-get -y upgrade
sudo apt-get -y install binutils gcc g++ wget make lzip texinfo

mkdir ~/gcc
mkdir ~/gcc-src

# Get GCC 8.2 from the official source
wget ftp://gcc.gnu.org/pub/gcc/releases/gcc-8.2.0/gcc-8.2.0.tar.xz
mv gcc-8.2.0.tar.xz ~/gcc-src

# Get the GNU Multiple Precision Library (GMP) version 4.3.2 (or later) from the official source
wget https://gmplib.org/download/gmp/gmp-6.1.2.tar.lz
mv gmp-6.1.2.tar.lz ~/gcc-src

# Get the isl library version 0.15 (or later) from the official source
wget ftp://gcc.gnu.org/pub/gcc/infrastructure/isl-0.18.tar.bz2
mv isl-0.18.tar.bz2 ~/gcc-src

# Get the GNU MPC library version 0.8.1 (or later) from the official source
wget https://ftp.gnu.org/gnu/mpc/mpc-1.1.0.tar.gz
mv mpc-1.1.0.tar.gz ~/gcc-src

# Get the GNU MPFR library version 2.4.2 (or later) from the official source
wget https://www.mpfr.org/mpfr-current/mpfr-4.0.2.tar.gz
mv mpfr-4.0.2.tar.gz ~/gcc-src

# Unpack them
cd ~/gcc-src
tar xf gcc-8.2.0.tar.xz
tar xf gmp-6.1.2.tar.lz
tar xf isl-0.18.tar.bz2
tar xf mpc-1.1.0.tar.gz
tar xf mpfr-4.0.2.tar.gz

# Move them to the gcc subdirectory
mv gmp-6.1.2 gcc-8.2.0/gmp
mv isl-0.18 gcc-8.2.0/isl
mv mpc-1.1.0 gcc-8.2.0/mpc
mv mpfr-4.0.2 gcc-8.2.0/mpfr

# Create the build directory
mkdir build && cd build

# Configure only c, c++ and lto and only 64 bit
../gcc-8.2.0/configure --disable-multilib --enable-languages=c,c++,lto

# Bootstrapping & building
make -j4 BOOT_CFLAGS='-O' bootstrap

# Installing
make DESTDIR=~/gcc install-strip

mv ~/gcc/usr/local/* ~/gcc
rm -r ~/gcc/usr

# Cleaning up all ubuntu packages except binutils and make
# apt -y purge gcc g++ wget lzip texinfo

# Deleting all source and build files. Ask the user befor deleting
echo "Finished! gcc and g++ are now located at ~~/gcc/bin"
echo "Ready to delete the source files and the intermediate files"
rm -Ir ~/gcc-src