setup_crosschain_x86_32.sh

#!/bin/bash

GCC=gcc-7.3.0
BINUTILS=binutils-2.30

echo installing gcc dependencies
sudo apt install -y bison
sudo apt install -y flex
sudo apt install -y libgmp3-dev
sudo apt install -y libmpc-dev
sudo apt install -y libmpfr-dev
sudo apt install -y texinfo

TMP=`mktemp -d`
cd $TMP
echo building toolchain inside `pwd` ...

echo downloading gcc and binutils src ...
wget https://ftp.gnu.org/gnu/gcc/gcc-7.3.0/$GCC.tar.gz
wget https://ftp.gnu.org/gnu/binutils/$BINUTILS.tar.gz

echo extracting gcc and binutils ...
tar xvzf $GCC.tar.gz
tar xvzf $BINUTILS.tar.gz

echo exporting environment variables ...
export PREFIX="$HOME/opt/cross"
export TARGET=i686-elf
export PATH="$PREFIX/bin:$PATH"

echo adding binary to /usr/bin ...
#TODO add tools to path

echo building binutils ...
cd $TMP
mkdir build-binutils
cd build-binutils
../$BINUTILS/configure --target=$TARGET --prefix="$PREFIX" --disable-nls
make -j4
make install -j4

echo building gcc ...
cd $TMP
mkdir build-gcc
cd build-gcc
../$GCC/configure --target=$TARGET --prefix="$PREFIX" --disable-nls --enable-languages=c,c++ --without-headers -disable-shared --with-gnu-as --with-gnu-ld --disable-threads --disable-libssp
make all-gcc -j4
make all-target-libgcc -j4
make install-gcc -j4
make install-target-libgcc -j4

rm -rf $TMP