export TARGET="${1}"
export PREFIX="`pwd`/rel-bin/${TARGET}"
export PATH="${PREFIX}/bin:${PATH}"
export OUT="`pwd`/out"

#### ZMIEŃ, JEŻELI CHCESZ INNE WERSJE, DOMYŚLNE "master", CZYLI "BLEEDING EDGE"
export binutils_version="master"
export libc_version="master"
export linux_version="master"
export gcc_version="master"

#### TU NIE ZMIENIAJ vvv
export nproc="$(( `grep -c "processor" /proc/cpuinfo` * 2 ))"
export ARGS="--enable-multilib --enable-multiarch --enable-targets=all --disable-werror"
#### TU NIE ZMIENIAJ ^^^


echo "${libc_version}" >.tmp
if grep -q "/" .tmp; then
	export _libc_version="`echo ${libc_version} | tr '/' '-'`"
else
	export _libc_version="${libc_version}"
fi
rm -rf .tmp

case "${2}" in
64)
	export CC="cc -m64"
	export CXX="c++ -m64" ;;
32)
	export CC="cc -m32"
	export CXX="c++ -m32" ;;
esac
mkdir -pv out

download()
{
	if [ ! -d gcc-${gcc_version} ]; then
		git clone --depth=1 -b ${gcc_version} "git://github.com/gcc-mirror/gcc" gcc-${gcc_version} || return ${?}
	fi
	if [ ! -d glibc-${_libc_version} ]; then
		git clone --depth=1 -b ${libc_version} "git://github.com/bminor/glibc" glibc-${_libc_version} || return ${?}
	fi
	if [ ! -d linux-${linux_version} ]; then
		git clone --depth=1 -b ${linux_version} "git://github.com/torvalds/linux" linux-${linux_version} || return ${?}
	fi
	if [ ! -d binutils-gdb-${binutils_version} ]; then
		git clone --depth=1 -b ${binutils_version} "git://github.com/bminor/binutils-gdb" binutils-gdb-${binutils_version} || return ${?}
	fi
}
build()
{
	make -C linux-${linux_version} ARCH="`echo ${TARGET} | cut -f 1 -d '-' | sed -e s/i.86/x86/ -e s/x86_64/x86/ -e s/sun4u/sparc64/ -e s/arm.*/arm/ -e s/sa110/arm/ -e s/s390x/s390/ -e s/parisc64/parisc/ -e s/ppc.*/powerpc/ -e s/mips.*/mips/ -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ -e s/riscv.*/riscv/`" INSTALL_HDR_PATH="${PREFIX}/${TARGET}" headers_install || return ${?}
	find ${PREFIX}/${TARGET} -name "..install.cmd" | xargs rm -rf || return ${?}
	find ${PREFIX}/${TARGET} -name ".install" | xargs rm -rf || return ${?}
	mkdir -pv build-binutils || return ${?}
	(cd build-binutils; ../binutils-gdb-${binutils_version}/configure --target="${TARGET}" --prefix="${PREFIX}" --disable-nls --enable-obsolete --disable-debug ${ARGS}) || return ${?}
	make -C build-binutils -j${nproc} || return ${?}
	make -C build-binutils -j${nproc} install || return ${?}
	if [ ! -e .dl_ok ]; then
		(cd gcc-${gcc_version}; contrib/download_prerequisites) || return ${?}
		touch .dl_ok || return ${?}
	fi
	mkdir -pv build-gcc || return ${?}
	(cd build-gcc; ../gcc-${gcc_version}/configure --target="${TARGET}" --prefix="${PREFIX}" --enable-languages="c,c++" --with-pkgversion="*DANiO* T00LCHAIN" ${ARGS} --disable-libgomp) || return ${?}
	make -C build-gcc -j${nproc} all-gcc || return ${?}
	make -C build-gcc -j${nproc} install-gcc || return ${?}
	mkdir -pv build-glibc || return ${?}
	env CC="${TARGET}-gcc" CXX="${TARGET}-g++" sh -c '(cd build-glibc; ../glibc-${_libc_version}/configure --prefix="${PREFIX}/${TARGET}" --host="${TARGET}" --with-headers="${PREFIX}/${TARGET}/include" --with-pkgversion="*DANiO* T00LCHAIN" --enable-add-ons ${ARGS})'
	make -C build-glibc -j${nproc} install-bootstrap-headers=yes install-headers || return ${?}
	make -C build-glibc -j${nproc} csu/subdir_lib || return ${?}
	mkdir -pv ${PREFIX}/${TARGET}/lib || return ${?}
	cp -ravf build-glibc/csu/crt1.o build-glibc/csu/crti.o build-glibc/csu/crtn.o ${PREFIX}/${TARGET}/lib || return ${?}
	${TARGET}-gcc -nostdlib -nostartfiles -shared -x c /dev/null -o ${PREFIX}/${TARGET}/lib/libc.so || return ${?}
	touch ${PREFIX}/${TARGET}/include/gnu/stubs.h || return ${?}
	make -C build-gcc -j${nproc} all-target-libgcc || return ${?}
	make -C build-gcc -j${nproc} install-target-libgcc || return ${?}
	make -C build-glibc -j${nproc} || return ${?}
	make -C build-glibc -j${nproc} install || return ${?}
	make -C build-gcc -j${nproc} all-target-libstdc++-v3 || return ${?}
	make -C build-gcc -j${nproc} install-target-libstdc++-v3 || return ${?}
}
strip_n_pack()
{
	find ${PREFIX} | xargs file | grep "ELF" | cut -f 1 -d ":" | xargs strip -S --strip-unneeded #for host
	find ${PREFIX}/${TARGET} | xargs file | grep "ELF" | cut -f 1 -d ":" | xargs ${TARGET}-strip -S --strip-unneeded #for sysroot
	if [ "${1}" == "64" ]; then
		(cd rel-bin; tar -cJvf "${OUT}/${TARGET}-GCC_${gcc_version}-`date +"%d-%m-%Y"`-`uname -s`_x86-64.txz" ${TARGET}) #|| return ${?}
	else
		(cd rel-bin; tar -cJvf "${OUT}/${TARGET}-GCC_${gcc_version}-`date +"%d-%m-%Y"`-`uname -s`_x86-32.txz" ${TARGET}) #|| return ${?}
	fi
}
test_gcc()
{
	echo -n "int main(){return 0;}" >test.cpp
	if ${TARGET}-g++ test.cpp -o test; then
		echo "${TARGET}-g++ TEST PASSED"
		rm -rf test{.cpp,}
		return 0
	else
		echo "${TARGET}-g++ TEST FAILED"
		rm -rf test{.cpp,}
		return 1
	fi
}

if [ -n "${clean}" ]; then
	rm -rf build-*
fi
if ! download; then
	echo "STAGE=${TARGET} MSG='at \"download_n_extract\" section'" >.error
	exit 1
fi
if ! build; then
	echo "STAGE=${TARGET} MSG='at \"build\" section'" >.error
	exit 1
fi
if ! test_gcc; then
	echo "STAGE=${TARGET} MSG='at \"test_gcc\" section'" >.error
	exit 1
fi
if ! strip_n_pack ${2}; then
	echo "STAGE=${TARGET} MSG='at \"strip_n_pack ${2}\" section'" >.error
	exit 1
fi