# output dir:
TOOLCHAIN=/opt/arm-toolchain

# build arch:
BUILDARCH=i686-linux-gnu

# #####################################################################
# MAIN TARGETS (binutils, gcc, g++, newlib, gdb for arm7tdmi)
# #####################################################################
toolchain: binutils gcc newlib gdb

# #####################################################################
BASE=$(shell /bin/pwd)
DOWNLOADS=$(BASE)/download
SOURCE=$(BASE)/source

PATH:=$(PATH):$(TOOLCHAIN)/bin
WGET:=/usr/bin/wget --passive-ftp -nd

# #####################################################################
BINUTILS_VERSION=2.17
BINUTILS_PACKAGE=binutils-$(BINUTILS_VERSION).tar.bz2
BINUTILS_DOWNLOAD=http://www.gnuarm.com/$(BINUTILS_PACKAGE)
BINUTILS_SOURCE=$(SOURCE)/binutils-$(BINUTILS_VERSION)
BINUTILS_BUILD=$(BINUTILS_SOURCE)-build

# #####################################################################
GCC_VERSION=4.1.1
GCC_PACKAGE=gcc-$(GCC_VERSION).tar.bz2
GCC_DOWNLOAD=http://www.gnuarm.com/$(GCC_PACKAGE)
GCC_SOURCE=$(SOURCE)/gcc-$(GCC_VERSION)
GCC_BUILD=$(GCC_SOURCE)-build

# #####################################################################
NEWLIB_VERSION=1.14.0
NEWLIB_PACKAGE=newlib-$(NEWLIB_VERSION).tar.gz
NEWLIB_DOWNLOAD=http://www.gnuarm.com/$(NEWLIB_PACKAGE)
NEWLIB_SOURCE=$(SOURCE)/newlib-$(NEWLIB_VERSION)
NEWLIB_BUILD=$(NEWLIB_SOURCE)-build

# #####################################################################
GDB_VERSION=6.6
GDB_PACKAGE=gdb-$(GDB_VERSION).tar.bz2
GDB_DOWNLOAD=http://ftp.gnu.org/gnu/gdb/$(GDB_PACKAGE)
GDB_SOURCE=$(SOURCE)/gdb-$(GDB_VERSION)
GDB_BUILD=$(GDB_SOURCE)-build

# #####################################################################
binutils: $(BINUTILS_BUILD)/.installed

$(DOWNLOADS)/$(BINUTILS_PACKAGE):
	$(WGET) -P $(DOWNLOADS) $(BINUTILS_DOWNLOAD)

$(BINUTILS_SOURCE)/.unpacked: $(DOWNLOADS)/$(BINUTILS_PACKAGE)
	tar -C $(SOURCE) -xjf $^
	touch $@

$(BINUTILS_BUILD)/.configured: $(BINUTILS_SOURCE)/.unpacked
	mkdir -p $(BINUTILS_BUILD)
	(cd $(BINUTILS_BUILD); $(BINUTILS_SOURCE)/configure \
		--build=$(BUILDARCH) --host=$(BUILDARCH) --target=arm-elf \
		--prefix=$(TOOLCHAIN) \
		--enable-interwork \
		--enable-multilib \
		--disable-nls \
		);
	touch $@

$(BINUTILS_BUILD)/.compiled: $(BINUTILS_BUILD)/.configured
	make -C $(BINUTILS_BUILD) all
	touch $@

$(BINUTILS_BUILD)/.installed: $(BINUTILS_BUILD)/.compiled
	make -C $(BINUTILS_BUILD) install
	touch $@

# #####################################################################
gcc: $(GCC_BUILD)/.installed

$(DOWNLOADS)/$(GCC_PACKAGE):
	$(WGET) -P $(DOWNLOADS) $(GCC_DOWNLOAD)

$(GCC_SOURCE)/.unpacked: $(DOWNLOADS)/$(GCC_PACKAGE)
	tar -C $(SOURCE) -xjf $^
	touch $@

$(GCC_BUILD)/.configured: $(GCC_SOURCE)/.unpacked $(NEWLIB_SOURCE)/.unpacked
	mkdir -p $(GCC_BUILD)
	(cd $(GCC_BUILD); $(GCC_SOURCE)/configure \
		--build=$(BUILDARCH) --host=$(BUILDARCH) --target=arm-elf \
		--prefix=$(TOOLCHAIN) \
		--enable-languages="c,c++" \
		--enable-interwork \
		--enable-multilib \
		--with-cpu=arm7tdmi \
		--with-newlib --with-headers=$(NEWLIB_SOURCE)/newlib/libc/include \
		--disable-nls \
		);
	touch $@

$(GCC_BUILD)/.stage1.compiled: $(GCC_BUILD)/.configured $(BINUTILS_BUILD)/.installed
	make -C $(GCC_BUILD) all-gcc
	touch $@

$(GCC_BUILD)/.stage1.installed: $(GCC_BUILD)/.stage1.compiled
	make -C $(GCC_BUILD) install-gcc
	touch $@

$(GCC_BUILD)/.stage2.compiled: $(GCC_BUILD)/.stage1.installed $(NEWLIB_BUILD)/.installed
	make -C $(GCC_BUILD) all
	touch $@

$(GCC_BUILD)/.stage2.installed: $(GCC_BUILD)/.stage2.compiled
	make -C $(GCC_BUILD) install
	touch $@

$(GCC_BUILD)/.installed: $(GCC_BUILD)/.stage1.installed $(GCC_BUILD)/.stage2.installed
	touch $@

# #####################################################################
newlib: $(NEWLIB_BUILD)/.installed

$(DOWNLOADS)/$(NEWLIB_PACKAGE):
	$(WGET) -P $(DOWNLOADS) $(NEWLIB_DOWNLOAD)

$(NEWLIB_SOURCE)/.unpacked: $(DOWNLOADS)/$(NEWLIB_PACKAGE)
	tar -C $(SOURCE) -xzf $^
	touch $@

$(NEWLIB_BUILD)/.configured: $(NEWLIB_SOURCE)/.unpacked $(GCC_BUILD)/.stage1.installed
	mkdir -p $(NEWLIB_BUILD)
	(cd $(NEWLIB_BUILD); $(NEWLIB_SOURCE)/configure \
		--build=$(BUILDARCH) --host=$(BUILDARCH) --target=arm-elf \
		--prefix=$(TOOLCHAIN) \
		--enable-interwork \
		--enable-multilib \
		--disable-nls \
		);
	touch $@

$(NEWLIB_BUILD)/.compiled: $(NEWLIB_BUILD)/.configured
	make -C $(NEWLIB_BUILD) all
	touch $@

$(NEWLIB_BUILD)/.installed: $(NEWLIB_BUILD)/.compiled
	make -C $(NEWLIB_BUILD) install
	touch $@

# #####################################################################
gdb: $(GDB_BUILD)/.installed

$(DOWNLOADS)/$(GDB_PACKAGE):
	$(WGET) -P $(DOWNLOADS) $(GDB_DOWNLOAD)

$(GDB_SOURCE)/.unpacked: $(DOWNLOADS)/$(GDB_PACKAGE)
	tar -C $(SOURCE) -xjf $^
	touch $@

$(GDB_BUILD)/.configured: $(GDB_SOURCE)/.unpacked $(GCC_BUILD)/.installed
	mkdir -p $(GDB_BUILD)
	(cd $(GDB_BUILD); $(GDB_SOURCE)/configure \
		--build=$(BUILDARCH) --host=$(BUILDARCH) --target=arm-elf \
		--prefix=$(TOOLCHAIN) \
		--enable-interwork \
		--enable-multilib \
		--disable-nls \
		);
	touch $@

$(GDB_BUILD)/.compiled: $(GDB_BUILD)/.configured
	make -C $(GDB_BUILD) all
	touch $@

$(GDB_BUILD)/.installed: $(GDB_BUILD)/.compiled
	make -C $(GDB_BUILD) install
	touch $@