compile_rhel_toolchain.sh

#!/usr/bin/env bash
# Based on:
# http://en.librehat.com/blog/build-gcc-5-dot-2-on-rhel-6/
set -euo pipefail

GCC_VERSION=5.3.0
GMP_VERSION=6.1.0
MPC_VERSION=1.0.3
MPFR_VERSION=3.1.4
JOBS=$(expr $(nproc) + $(nproc))

PREFIX=/opt/gcc5

set -x

### Install packages
sudo yum -q install gcc gcc-c++ make texinfo wget zlib-devel

### Download archives
wget -qN "ftp://ftp.mirrorservice.org/sites/sourceware.org/pub/gcc/releases/gcc-${GCC_VERSION}/gcc-${GCC_VERSION}.tar.bz2" -P .
wget -qN "https://gmplib.org/download/gmp/gmp-${GMP_VERSION}.tar.bz2" -P .
wget -qN "ftp://ftp.gnu.org/gnu/mpc/mpc-${MPC_VERSION}.tar.gz" -P .
wget -qN "http://www.mpfr.org/mpfr-current/mpfr-${MPFR_VERSION}.tar.bz2" -P .

### Unpack GCC and create subdirectories
[ ! -e "./gcc-${GCC_VERSION}" ] && tar xaf "gcc-${GCC_VERSION}".tar.bz2
mkdir -p "./gcc-${GCC_VERSION}/gmp"
mkdir -p "./gcc-${GCC_VERSION}/mpc"
mkdir -p "./gcc-${GCC_VERSION}/mpfr"
mkdir -p "./gcc-${GCC_VERSION}/gcc-build"

### Unpack dependencies
tar xaf "gmp-${GMP_VERSION}.tar.bz2" -C "./gcc-${GCC_VERSION}/gmp" --strip-components=1
tar xaf "mpc-${MPC_VERSION}.tar.gz" -C "./gcc-${GCC_VERSION}/mpc" --strip-components=1
tar xaf "mpfr-${MPFR_VERSION}.tar.bz2" -C "./gcc-${GCC_VERSION}/mpfr" --strip-components=1

cd "gcc-${GCC_VERSION}/gcc-build"

### Configure
../configure\
  --prefix="${PREFIX}"\
  --enable-bootstrap\
  --enable-shared\
  --enable-threads=posix\
  --enable-checking=release\
  --with-system-zlib\
  --enable-__cxa_atexit\
  --disable-libunwind-exceptions\
  --enable-gnu-unique-object\
  --enable-languages=c,c++\
  --disable-dssi\
  --with-ppl\
  --with-cloog\
  --with-tune=generic\
  --with-arch_32=i686\
  --build x86_64-redhat-linux-gnu\
  --host x86_64-redhat-linux-gnu\
  --disable-multilib\
  --enable-libstdcxx-threads\
  --enable-libstdcxx-time\
  --disable-libada\
  --with-default-libstdcxx-abi=gcc4-compatible

### Build
make -j "${JOBS}"

### Install
mkdir -p "${PREFIX}"
cat << EOF > "${PREFIX}/activate.sh"
export PATH=${PREFIX}/bin:\$PATH
export MANPATH=${PREFIX}/share/man:\$MANPATH
export INFOPATH=${PREFIX}/share/info:\$INFOPATH
export LD_LIBRARY_PATH=${PREFIX}/lib64:${PREFIX}/lib:\$LD_LIBRARY_PATH
export LD_RUN_PATH=${PREFIX}/lib64:${PREFIX}/lib:\$LD_RUN_PATH
export LIBRARY_PATH=${PREFIX}/lib64:${PREFIX}/lib:\$LIBRARY_PATH
export INCLUDE_PATH=${PREFIX}/include:\$INCLUDE_PATH
export CPLUS_INCLUDE_PATH=${PREFIX}/include:\$CPLUS_INCLUDE_PATH
export C_INCLUDE_PATH=${PREFIX}/include:\$C_INCLUDE_PATH
EOF
make install