Wharfie

#
# Copyright 2017 Ingo Hornberger <ingo_@gmx.net>
#
# This software is licensed under the MIT License
#
# Permission is hereby granted, free of charge, to any person obtaining a copy of this
# software and associated documentation files (the "Software"), to deal in the Software
# without restriction, including without limitation the rights to use, copy, modify,
# merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to the following
# conditions:
#
# The above copyright notice and this permission notice shall be included in all copies
# or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
# INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
# PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
# OR OTHER DEALINGS IN THE SOFTWARE.
################################################################################

SHELL=/bin/bash
PATH := $(PATH):/sbin:/usr/sbin
SUDO=$(shell PATH=${PATH}:/sbin:/usr/sbin which sudo)
FAKEROOT=$(shell PATH=${PATH}:/sbin:/usr/sbin which fakeroot)
FAKECHROOT=$(shell PATH=${PATH}:/sbin:/usr/sbin which fakechroot)
DBOOTSTRAP=$(shell PATH=${PATH}:/sbin:/usr/sbin which qemu-debootstrap)
DBOOTSTRAP2=$(shell PATH=${PATH}:/sbin:/usr/sbin which debootstrap)
KPARTX=$(shell PATH=${PATH}:/sbin:/usr/sbin which kpartx)
PACKAGES=locales systemd dbus

MAKEFILE_PATH := $(abspath $(lastword $(MAKEFILE_LIST)))
CWD := $(dir $(MAKEFILE_PATH))

# extend path to sbin binaries
export PATH := /usr/sbin:${PATH}

ifeq (${SUDO},)
$(error sudo not found. On debian, you may install the package sudo first)
endif

#ifeq (${FAKEROOT},)
#$(error fakeroot not found. On debian, you may install the package fakeroot first)
#endif

#ifeq (${FAKECHROOT},)
#$(error fakechroot not found. On debian, you may install the package fakechroot first)
#endif

ifeq (${DBOOTSTRAP},)
$(error qemu-debootstrap not found. On debian, you may install the package qemu-user-static first)
endif

ifeq (${DBOOTSTRAP2},)
$(error debootstrap not found. On debian, you may install the package debootstrap first)
endif

ifeq (${KPARTX},)
$(error kpartx not found. On debian, you may install the package kpartx first)
endif

.PHONY: test
test:
	echo ${FAKEROOT}

#
# Set version specific system variables for the toolchain
#
debian_armhf_%.tar: gcc_postfix=-arm-none-eabi
debian_armhf_%.tar: libc_postfix=-armhf-cross
debian_armel_%.tar: gcc_postfix=-arm-none-eabi
debian_armel_%.tar: libc_postfix=-armhf-cross
debian_arm64_%.tar: gcc_postfix=-aarch64-linux-gnu
debian_arm64_%.tar: libc_postfix=-arm64-cross

# stretch changed doesn't support ARM non-eabi anymore, but has more specific ones
debian_armhf_stretch.tar: gcc_postfix=-arm-linux-gnueabihf
debian_armel_stretch.tar: gcc_postfix=-arm-linux-gnueabi

# since stretch, ARM supports g++
debian_armhf_stretch.tar: additional_arch_packages+=g++-arm-linux-gnueabihf
debian_armel_stretch.tar: additional_arch_packages+=g++-arm-linux-gnueabi
debian_amd64_stretch.tar: additional_arch_packages+=g++

#
# Debian / ARM Hardfloat
#
.PHONY: debian_armhf_%.tar
debian_armhf_%.tar: 
	-mkdir ./$$(basename $@ .tar)
	${SUDO} ${DBOOTSTRAP} --arch=armhf --variant=minbase --include="${PACKAGES}" $* ./$$(basename $@ .tar) http://ftp.debian.org/debian/
	(echo "deb http://ftp.debian.org/debian $* main"; \
	 echo "deb-src http://ftp.debian.org/debian $* main") | ${SUDO} tee ./$$(basename $@ .tar)/etc/apt/sources.list
	cd $$(basename $@ .tar); ${SUDO} tar -cf "../$@" .
	${SUDO} rm -R ./$$(basename $@ .tar)
	echo DEBIAN_VERSION=$* > debian_version.mk
	echo GCC_POSTFIX=${gcc_postfix} >> debian_version.mk
	echo LIBC_POSTFIX=${libc_postfix} >> debian_version.mk
	echo ADDITIONAL_ARCH_PACKAGES=${additional_arch_packages} >> debian_version.mk

#
# Debian / ARM EABI
#
.PHONY: debian_armel_%.tar
debian_armel_%.tar:
	-mkdir ./$$(basename $@ .tar)
	${SUDO} ${DBOOTSTRAP} --arch=armel --variant=minbase --include="${PACKAGES}" $* ./$$(basename $@ .tar) http://ftp.debian.org/debian/
	(echo "deb http://ftp.debian.org/debian $* main"; \
	 echo "deb-src http://ftp.debian.org/debian $* main") | ${SUDO} tee ./$$(basename $@ .tar)/etc/apt/sources.list
	cd $$(basename $@ .tar); ${SUDO} tar -cf "../$@" .
	${SUDO} rm -R ./$$(basename $@ .tar)
	echo DEBIAN_VERSION=$* > debian_version.mk
	echo GCC_POSTFIX=${gcc_postfix} >> debian_version.mk
	echo LIBC_POSTFIX=${libc_postfix} >> debian_version.mk
	echo ADDITIONAL_ARCH_PACKAGES=${additional_arch_packages} >> debian_version.mk

#
# Debian / ARM64
#
.PHONY: debian_arm64_%.tar
debian_arm64_%.tar:
	-mkdir ./$$(basename $@ .tar)
	${SUDO} ${DBOOTSTRAP} --arch=arm64 --variant=minbase --include="${PACKAGES}" $* ./$$(basename $@ .tar) http://ftp.debian.org/debian/
	(echo "deb http://ftp.debian.org/debian $* main"; \
	 echo "deb-src http://ftp.debian.org/debian $* main") | ${SUDO} tee ./$$(basename $@ .tar)/etc/apt/sources.list
	cd $$(basename $@ .tar); ${SUDO} tar -cf "../$@" .
	${SUDO} rm -R ./$$(basename $@ .tar)
	echo DEBIAN_VERSION=$* > debian_version.mk
	echo GCC_POSTFIX=${gcc_postfix} >> debian_version.mk
	echo LIBC_POSTFIX=${libc_postfix} >> debian_version.mk
	echo ADDITIONAL_ARCH_PACKAGES=${additional_arch_packages} >> debian_version.mk

#
# Debian x86/amd64...
# extended for debian_{amd64,i386}_{deb_version}.tar
# or old format "debian_{deb_version}.tar"
.PHONY: debian_%.tar
debian_%.tar:
	$(eval ARCH:=$(if $(word 3,$(subst _, ,$@)),$(word 2,$(subst _, ,$@)),"i386"))
	$(eval VERSION:=$(if $(word 3,$(subst _, ,$@)),$(basename $(word 3,$(subst _, ,$@))),$(basename $(word 2,$(subst _, ,$@)))))
	-mkdir ./$$(basename $@ .tar)
	${SUDO} ${DBOOTSTRAP} --arch=${ARCH} --variant=minbase --include="${PACKAGES}" ${VERSION} ./$$(basename $@ .tar) http://ftp.debian.org/debian/
	(echo "deb http://ftp.debian.org/debian ${VERSION} main"; \
	 echo "deb-src http://ftp.debian.org/debian ${VERSION} main") | ${SUDO} tee ./$$(basename $@ .tar)/etc/apt/sources.list
	cd $$(basename $@ .tar); ${SUDO} tar -cf "../$@" .
	${SUDO} rm -R ./$$(basename $@ .tar)
	echo DEBIAN_VERSION=${VERSION} > debian_version.mk
	echo GCC_POSTFIX=${gcc_postfix} >> debian_version.mk
	echo LIBC_POSTFIX=${libc_postfix} >> debian_version.mk
	echo ADDITIONAL_ARCH_PACKAGES=${additional_arch_packages} >> debian_version.mk

-include debian_version.mk

#
# Debian Cross-Toolchain
#
debian_toolchain.tar:
	${MAKE} make_toolchain

# note, this is only a sub-taget, so that we build in a subprocess, and debian_version.mk is included
.PHONY: make_toolchain
make_toolchain:
	-mkdir ./debian_toolchain
	${SUDO} ${DBOOTSTRAP} --arch=amd64 --variant=minbase --include="${ADDITIONAL_TOOLCHAIN_PACKAGES} gcc${GCC_POSTFIX} libc6-dev${LIBC_POSTFIX} ${ADDITIONAL_ARCH_PACKAGES}" ${DEBIAN_VERSION} ./debian_toolchain http://ftp.debian.org/debian/
	${SUDO} chroot ./debian_toolchain ldconfig
	cd debian_toolchain && ${SUDO} tar -cf "../debian_toolchain.tar" .
	${SUDO} rm -R ./debian_toolchain

#
# Export environment shell script for the toolchain
#

define ENV_SH
TC_PATH=$$(dirname $$_)

SYSROOT=$${TC_PATH}/target
INCLUDEDIR=$${TC_PATH}/host/usr/arm-linux-gnueabihf/include/
LIBRARYDIR=$${TC_PATH}/target/usr/lib/arm-linux-gnueabihf/

COMPILE_PREFIX=$${TC_PATH}/host/usr/bin/arm-none-eabi-
PLUGINDIR=$$(dirname $$(readlink -f $${TC_PATH}/host/usr/lib/gcc/arm-none-eabi/*/liblto_plugin.so))
HOSTLIBDIR=$${TC_PATH}/host/usr/lib/i386-linux-gnu/:$${TC_PATH}/host/usr/lib/:$${TC_PATH}/host/lib

LD_LIBRARY_PATH=$${HOSTLIBDIR}
CC=$${COMPILE_PREFIX}gcc
CXX=$${COMPILE_PREFIX}g++
LD=$${COMPILE_PREFIX}ld
AS=$${COMPILE_PREFIX}as
AR=$${COMPILE_PREFIX}ar
NM=$${COMPILE_PREFIX}nm
GCOV=$${COMPILE_PREFIX}gcov
OBJDUMP=$${COMPILE_PREFIX}objdump
CFLAGS=
LDFLAGS=
# common C/LD Flags
CFLAGS="$${CFLAGS} --sysroot=$${SYSROOT}"
CFLAGS="$${CFLAGS} -B$${PLUGINDIR} -mfloat-abi=hard"
LDFLAGS="$${CFLAGS}"
# CFLAGS
CFLAGS="$${CFLAGS} --sysroot=$${SYSROOT}"
CFLAGS="-I$${INCLUDEDIR}"

# LDFLAGS
LDFALGS="-L$${LIBRARYDIR}"
LDFLAGS="$${LDFLAGS} -L$${LIBRARYDIR}"
LDFLAGS="$${LDFLAGS} -B$${LIBRARYDIR}"
LDFLAGS="$${LDFLAGS} -lc"

export CC
export CXX
export LD
export AS
export AR
export NM
export GCOV
export OBJDUMP
export CFLAGS
export LDFLAGS
export LD_LIBRARY_PATH
endef

export ENV_SH

debian_toolchain_env.sh:
	@echo "$${ENV_SH}" > $@

# output some info about the locally generated filesystem
info:
	@[ -f ${OUTPUT_FILE} ] || (echo "The image ${OUTPUT_FILE} is not build, yet."; false)
	@targethostname="$$(tar -O -xf ${OUTPUT_FILE} ./etc/hostname)"; \
	 printf "Hostname: %s\n" $${targethostname}; \
	 printf "IP: %s (if target is running)\n" $$(ping -c 1 "$${targethostname}" 2>&1 | sed -n '/bytes from/ s,.*(\([^)]*\)).*,\1, p');

clean:
	rm -f debian_version.mk
	rm -f debian_*.tar
	rm -f *.piling.tar *.piling.tar.snar
	for i in ???????.piling/; do sudo rm -Rf "./$$i"; done
	for i in ????????.piling/; do sudo rm -Rf "./$$i"; done