#!/bin/sh
# Everest Linux 1.0.0-busybox - Stage 2 Installation Script
# This program is free software: See the GNU GPL v3.0 for details

printf "[ !!! ] WARNING! DO NOT RUN THIS SCRIPT AS ROOT!\n"
printf "[ i ] Starting in 10 seconds.\n"
	sleep 10
printf "[ i ] Starting stage 2 installation...\n"
	sleep 0.5

printf "[ i ] Creating bash configuration files...\n"
	cat > ~/.bash_profile << "EOF"
	exec env -i HOME=${HOME} TERM=${TERM} PS1='\u:\w\$ ' /bin/bash
EOF

	cat > ~/.bashrc << "EOF"
	set +h
	umask 022
	EVEREST=/mnt/everest
	LC_ALL=POSIX
	PATH=${EVEREST}/cross-tools/bin:/bin:/usr/bin
	export EVEREST LC_ALL PATH
EOF

printf "[ i ] Sourcing .bash_profile...\n"
	source ~/.bash_profile

printf "[ i ] Unsetting CFLAGS...\n"
	unset CFLAGS
	echo unset CFLAGS >> ~/.bashrc

printf "[ i ] Setting build variables...\n"
	export EVEREST_HOST=$(echo ${MACHTYPE} | sed "s/-[^-]*/-cross/")
	export EVEREST_TARGET=x86_64-linux-musl
	export EVEREST_CPU=k8

printf "[ i ] Setting CPU architecture..\n"
	export EVEREST_ARCH="x86"

printf "[ i ] Adding build variables to .bashrc...\n"
	echo export EVEREST_HOST=\""${EVEREST_HOST}\"" >> ~/.bashrc
	echo export EVEREST_TARGET=\""${EVEREST_TARGET}\"" >> ~/.bashrc
	echo export EVEREST_ARCH=\""${EVEREST_ARCH}\"" >> ~/.bashrc
	echo export EVEREST_CPU=\""${EVEREST_CPU}\"" >> ~/.bashrc

printf "[ i ] Creating sysroot directory...\n"
	mkdir -p ${EVEREST}/cross-tools/${EVEREST_TARGET}
	ln -sfv . ${EVEREST}/cross-tools/${EVEREST_TARGET}/usr

printf "[ i ] Moving tarballs to cross-tools directory...\n"
	cd /home/everest/everest-install/scripts/tempfiles
	mv -rv * $EVEREST/sources

printf "[ i ] Preparing to build initial toolchain...\n"
	cd $EVEREST/sources

printf "[ i ] Starting build of >>> Linux-Headers-4.9.22 <<<\n"
	sleep 3
	tar -xvf linux-4.9.22.tar.xz
	cd linux-4.9.22
	make mrproper
	make ARCH=${EVEREST_ARCH} headers_check
	make ARCH=${EVEREST_ARCH} INSTALL_HDR_PATH=${EVEREST}/cross-tools/${EVEREST_TARGET} headers_install
	cd ..
	
printf "[ i ] Starting build of >>> Binutils-2.27 <<<\n"
	sleep 3
	tar -xvf binutils-2.27.tar.bz2
	cd binutils-2.27
	mkdir -v ../binutils-build
	cd ../binutils-build
	../binutils-2.27/configure \
   		--prefix=${EVEREST}/cross-tools \
   		--target=${EVEREST_TARGET} \
   		--with-sysroot=${EVEREST}/cross-tools/${EVEREST_TARGET} \
   		--disable-nls \
   		--disable-multilib
	make configure-host
	make
	make install
	cd ../..
printf "[ i ] Finished build of >>> Binutils-2.27 <<<\n"

printf "[ i ] Starting build of >>> GCC-6.2.0 - Static <<<\n"
	sleep 3
	tar -xvf gcc-6.2.0.tar.bz2
	cd gcc-6.2.0
	tar xf ../mpfr-3.1.4.tar.bz2
	mv -v mpfr-3.1.4 mpfr
	tar xf ../gmp-6.1.1.tar.bz2
	mv -v gmp-6.1.1 gmp
	tar xf ../mpc-1.0.3.tar.gz
	mv -v mpc-1.0.3 mpc
	mkdir -v ../gcc-build
	cd ../gcc-build
	../gcc-6.2.0/configure \
  		--prefix=${EVEREST}/cross-tools \
  		--build=${EVEREST_HOST} \
  		--host=${EVEREST_HOST} \
  		--target=${EVEREST_TARGET} \
  		--with-sysroot=${EVEREST}/cross-tools/${EVEREST_TARGET} \
  		--disable-nls  \
  		--disable-shared \
  		--without-headers \
  		--with-newlib \
  		--disable-decimal-float \
  		--disable-libgomp \
  		--disable-libmudflap \
  		--disable-libssp \
  		--disable-libatomic \
  		--disable-libquadmath \
  		--disable-threads \
  		--enable-languages=c \
  		--disable-multilib \
  		--with-mpfr-include=$(pwd)/../gcc-6.2.0/mpfr/src \
  		--with-mpfr-lib=$(pwd)/mpfr/src/.libs \
  		--with-arch=${EVEREST_CPU}
	make all-gcc all-target-libgcc
	make install-gcc install-target-libgcc
	cd ..
	rm -rf gcc-build
	cd ..
printf "[ i ] Finished build of >>> GCC-6.2.0 - Static <<<\n"

printf "[ i ] Starting build of >>> musl-1.1.16 <<<\n"
	sleep 3
	tar -xvf musl-1.1.16.tar.gz
	cd musl-1.1.16
	./configure \
  		CROSS_COMPILE=${EVEREST_TARGET}- \
  		--prefix=/ \
  		--target=${EVEREST_TARGET}
	make
	DESTDIR=${EVEREST}/cross-tools/${EVEREST_TARGET} make install
	cd ..
printf "[ i ] Finished build of >>> musl-1.1.16 <<<\n"

printf "[ i ] Starting build of >>> GCC-6.2.0 - Final <<<\n"
	sleep 3
	rm -rf gcc-6.2.0
	tar -xvf gcc-6.2.0.tar.bz2
	cd gcc-6.2.0
	tar xf ../mpfr-3.1.4.tar.bz2
	mv -v mpfr-3.1.4 mpfr
	tar xf ../gmp-6.1.1.tar.bz2
	mv -v gmp-6.1.1 gmp
	tar xf ../mpc-1.0.3.tar.gz
	mv -v mpc-1.0.3 mpc
	mkdir -v ../gcc-build
	cd ../gcc-build
	../gcc-6.2.0/configure \
  		--prefix=${EVEREST}/cross-tools \
  		--build=${EVEREST_HOST} \
  		--host=${EVEREST_HOST} \
  		--target=${EVEREST_TARGET} \
  		--with-sysroot=${EVEREST}/cross-tools/${EVEREST_TARGET} \
  		--disable-nls \
  		--enable-languages=c,c++ \
  		--enable-c99 \
  		--enable-long-long \
  		--disable-libmudflap \
  		--disable-multilib \
  		--with-mpfr-include=$(pwd)/../gcc-6.2.0/mpfr/src \
  		--with-mpfr-lib=$(pwd)/mpfr/src/.libs \
  		--with-arch=${EVEREST_CPU}
	make
	make install
	cd ..
printf "[ i ] Finished build of >> GCC-6.2.0 - Final <<<\n"

printf "[ i ] Toolchain has finished building.\n"

printf "[ i ] Setting toolchain variables...\n"
	echo export CC=\""${EVEREST_TARGET}-gcc --sysroot=${EVEREST}/targetfs\"" >> ~/.bashrc
	echo export CXX=\""${EVEREST_TARGET}-g++ --sysroot=${EVEREST}/targetfs\"" >> ~/.bashrc
	echo export AR=\""${EVEREST_TARGET}-ar\"" >> ~/.bashrc
	echo export AS=\""${EVEREST_TARGET}-as\"" >> ~/.bashrc
	echo export LD=\""${EVEREST_TARGET}-ld --sysroot=${EVEREST}/targetfs\"" >> ~/.bashrc
	echo export RANLIB=\""${EVEREST_TARGET}-ranlib\"" >> ~/.bashrc
	echo export READELF=\""${EVEREST_TARGET}-readelf\"" >> ~/.bashrc
	echo export STRIP=\""${EVEREST_TARGET}-strip\"" >> ~/.bashrc
	source ~/.bashrc

printf "[ i ] Starting build of system...\n"
	sleep 3

printf "[ i ] Creating system directories...\n"
	mkdir -pv ${EVEREST}/targetfs/{bin,boot,dev,etc,home,lib/{firmware,modules}}
	mkdir -pv ${EVEREST}/targetfs/{mnt,opt,proc,sbin,srv,sys}
	mkdir -pv ${EVEREST}/targetfs/var/{cache,lib,local,lock,log,opt,run,spool}
	install -dv -m 0750 ${EVEREST}/targetfs/root
	install -dv -m 1777 ${EVEREST}/targetfs/{var/,}tmp
	mkdir -pv ${EVEREST}/targetfs/usr/{,local/}{bin,include,lib,sbin,share,src}
	ln -svf ../proc/mounts ${EVEREST}/targetfs/etc/mtab
	cat > ${EVEREST}/targetfs/etc/passwd << "EOF"
	root::0:0:root:/root:/bin/ash
EOF
	cat > ${CLFS}/targetfs/etc/group << "EOF"
	root:x:0:
	bin:x:1:
	sys:x:2:
	kmem:x:3:
	tty:x:4:
	tape:x:5:
	daemon:x:6:
	floppy:x:7:
	disk:x:8:
	lp:x:9:
	dialout:x:10:
	audio:x:11:
	video:x:12:
	utmp:x:13:
	usb:x:14:
	cdrom:x:15:
EOF
	touch ${EVEREST}/targetfs/var/log/lastlog
	chmod -v 664 ${EVEREST}/targetfs/var/log/lastlog

printf "[ i ] Starting build of >>> libgcc-6.2.0 <<<\n"
	cp -v ${EVEREST}/cross-tools/${EVEREST_TARGET}/lib/libgcc_s.so.1 ${EVEREST}/targetfs/lib/
	${EVEREST_TARGET}-strip ${EVEREST}/targetfs/lib/libgcc_s.so.1
printf "[ i ] Finished build of >>> libgcc-6.2.0 <<<\n"
	sleep 1

printf "[ i ] Starting build of >>> musl-1.1.16 <<<\n"
	rm -rf musl-1.1.16
	tar -xvf musl-1.1.16.tar.gz
	cd musl-1.1.16
	./configure \
  		CROSS_COMPILE=${EVEREST_TARGET}- \
  		--prefix=/ \
  		--disable-static \
  		--target=${EVEREST_TARGET}
	make
	DESTDIR=${EVEREST}/targetfs make install-libs
	cd ..
printf "[ i ] Finished build of >>> musl-1.1.16 <<<\n"
	sleep 1

printf "[ i ] Starting build of >>> busybox-1.24.2 <<<\n"
	tar -xvf busybox-1.24.2.tar.bz2
	cd busybox-1.24.2
	make distclean
	make ARCH="${EVEREST_ARCH}" defconfig
	sed -i 's/\(CONFIG_\)\(.*\)\(INETD\)\(.*\)=y/# \1\2\3\4 is not set/g' .config
	sed -i 's/\(CONFIG_IFPLUGD\)=y/# \1 is not set/' .config
	sed -i 's/\(CONFIG_FEATURE_WTMP\)=y/# \1 is not set/' .config
	sed -i 's/\(CONFIG_FEATURE_UTMP\)=y/# \1 is not set/' .config
	sed -i 's/\(CONFIG_UDPSVD\)=y/# \1 is not set/' .config
	sed -i 's/\(CONFIG_TCPSVD\)=y/# \1 is not set/' .config
	make ARCH="${EVEREST_ARCH}" CROSS_COMPILE="${EVEREST_TARGET}-"
	make ARCH="${EVEREST_ARCH}" CROSS_COMPILE="${EVEREST_TARGET}-"\
	CONFIG_PREFIX="${EVEREST}/targetfs" install
	cp -v examples/depmod.pl ${EVEREST}/cross-tools/bin
	chmod -v 755 ${EVEREST}/cross-tools/bin/depmod.pl