#!/bin/bash

set -e

mkdir -p install-gcc

cd install-gcc

echo && echo "download and unpack" && echo

GCC_SOURCES_URL="https://ftp.gnu.org/gnu/gcc/gcc-7.2.0/gcc-7.2.0.tar.xz"

wget -c "$GCC_SOURCES_URL"

tar -xf gcc-*.tar.*

echo && echo "build and install" && echo

mkdir -p build

cd build

[ -f "../configure.done" ] || (../gcc-*/configure && touch "../configure.done")

make -j`nproc` || make || make

make install

(cd /usr/local/bin && ln gcc cc)

cd ..

echo && echo "add licenses" && echo

cd gcc-*

PREFIX="/usr/local/share/doc"

TARGET="../copyright"

TARGET_DIRS="gcc g++ gfortran cc c++ fortran"

echo > "$TARGET"

for FILE in README COPYING* MAINTAINERS; do

    echo ""                                      >> "$TARGET"

    echo "-------------------------------------" >> "$TARGET"

    echo "  File: $FILE"                         >> "$TARGET"

    echo "-------------------------------------" >> "$TARGET"

    echo ""                                      >> "$TARGET"

    cat  "$FILE"                                 >> "$TARGET"

done

for TARGET_DIR in $TARGET_DIRS; do

    mkdir -p "$PREFIX/$TARGET_DIR"

    cp "$TARGET" "$PREFIX/$TARGET_DIR/"

done

cd ..

cd ..

echo && echo "clean" && echo

rm -r install-gcc