#!/bin/bash
set -e

mkdir -p isl mpfr gmp mpc
tar -xf ../isl-*.tar.xz  -C isl --strip-components=1 &&
tar -xf ../mpfr-*.tar.xz -C mpfr --strip-components=1 &&
tar -xf ../gmp-*.tar.xz  -C gmp --strip-components=1 &&
tar -xf ../mpc-*.tar.gz  -C mpc --strip-components=1 &&

case $(uname -m) in
  x86_64)
    sed -e '/m64=/s/lib64/lib/' -i.orig gcc/config/i386/t-linux64
  ;;
  aarch64)
    sed -e '/mabi.lp64=/s/lib64/lib/' \
	-i.orig gcc/config/aarch64/t-aarch64-linux
  ;;
esac

mkdir -v build
cd build || exit 1

mkdir -pv "${LFS_TGT}"/libgcc &&
ln -s ../../../libgcc/gthr-posix.h "${LFS_TGT}"/libgcc/gthr-default.h &&
../configure \
    --build="$(../config.guess)" \
    --host="${LFS_TGT}" \
    --prefix=/usr \
    CC_FOR_TARGET="${LFS_TGT}"-gcc \
    --with-build-sysroot="${LFS}" \
    --enable-initfini-array \
    --disable-nls \
    --disable-multilib \
    --disable-decimal-float \
    --disable-libatomic \
    --disable-libgomp \
    --disable-libquadmath \
    --disable-libssp \
    --disable-libvtv \
    --disable-libstdcxx \
    --enable-languages=c,c++ \
    "$([ "$(uname -m)" = aarch64 ] && echo --with-arch=armv8-a)" \
    "$([ "$(uname -m)" = aarch64 ] && echo --with-cpu=cortex-a73.cortex-a53)" \
    "$([ "$(uname -m)" = aarch64 ] && echo --enable-fix-cortex-a53-835769)" \
    "$([ "$(uname -m)" = aarch64 ] && echo --enable-fix-cortex-a53-843419)" &&

make &&
make DESTDIR="${LFS}" -j1 install &&
ln -sv gcc "${LFS}"/usr/bin/cc