#!/usr/bin/make -f
#
# \brief  Tool-chain creation tool for the Genode OS Framework
# \author Norman Feske
# \date   2009-02-03
#

help:
	$(ECHO)
	$(ECHO) "Build tool chain for the Genode OS Framework"
	$(ECHO)
	$(ECHO) "The tool chain consists of GCC $(GCC_VERSION) and binutils $(BINUTILS_VERSION)"
	$(ECHO) "and will be created at '$(LOCAL_INSTALL_LOCATION)'."
	$(ECHO)
	$(ECHO) "--- available commands ---"
	$(ECHO) "x86        - create tool chain for x86"
	$(ECHO) "arm        - create tool chain for arm"
	$(ECHO) "clean      - clean everything except downloaded archives"
	$(ECHO) "cleanall   - clean everything including downloaded archives"
	$(ECHO) "install    - copy tool chain to '$(INSTALL_LOCATION)'"
	$(ECHO)

#
# User interface
#

SUPPORTED_PLATFORMS := x86 microblaze arm

PLATFORM := $(firstword $(filter $(SUPPORTED_PLATFORMS),$(MAKECMDGOALS)))

$(SUPPORTED_PLATFORMS): install

#
# Enable parallel build for 2nd-level $(MAKE) by default
#

MAKE_OPT ?= -j4

#
# Determine Genode base directory based on the known location of the
# 'create_builddir' tool within the Genode source tree
#

GENODE_DIR ?= $(realpath $(dir $(firstword $(MAKEFILE_LIST)))/..)

#
# Download locations
#

DOWNLOAD_MIRROR      ?= ftp://ftp.fu-berlin.de
GCC_DOWNLOAD_URL      = $(DOWNLOAD_MIRROR)/gnu/gcc
BINUTILS_DOWNLOAD_URL = $(DOWNLOAD_MIRROR)/gnu/binutils
GDB_DOWNLOAD_URL      = $(DOWNLOAD_MIRROR)/gnu/gdb
GMP_DOWNLOAD_URL      = $(DOWNLOAD_MIRROR)/gnu/gmp
MPFR_DOWNLOAD_URL     = $(DOWNLOAD_MIRROR)/gnu/mpfr
MPC_DOWNLOAD_URL     ?= http://www.multiprecision.org/mpc/download


#
# Tool versions and install location
#

GCC_VERSION       = 4.7.4
BINUTILS_VERSION  = 2.22
GDB_VERSION       = 7.3.1
GMP_VERSION       = 5.0.2
MPFR_VERSION      = 3.1.0
MPC_VERSION       = 0.9
INSTALL_LOCATION  = /usr/local/genode-gcc
DOWNLOAD_DIR      = download
CONTRIB_DIR       = contrib
SIGVERIFIER       = $(GENODE_DIR)/tool/download_sigver

BINUTILS_DOWNLOAD_TBZ2 = binutils-$(BINUTILS_VERSION).tar.bz2

# download file name differs from dir name found within the archive
ifeq ($(BINUTILS_VERSION),2.21.1)
BINUTILS_DOWNLOAD_TBZ2 = binutils-$(BINUTILS_VERSION)a.tar.bz2
endif

#
# Utilities
#

##
# Return $(2) if $(1) is empty, "" else
#
check_nonempty_f = $(if $(1),,$(info $(2))$(2))

##
# Return $(3) if $(1) != $(2), "" else
#
check_equal_f = $(if $(filter $(1),$(2)),,$(info $(3))$(3))


SHELL       = bash
BRIGHT_COL  = \033[01;33m
DEFAULT_COL = \033[0m
ECHO        = @echo -e
VERBOSE     = @

#
# Check if 'autoconf' is installed
#
AUTOCONF_VERSION_gcc_4.4.5 = 2.59
AUTOCONF_VERSION_gcc_4.6.1 = 2.64
AUTOCONF_VERSION_gcc_4.7.4 = 2.64

AUTOCONF_VERSION = $(AUTOCONF_VERSION_gcc_$(GCC_VERSION))

ifeq ($(AUTOCONF_VERSION),)
$(error Unknown autoconf version for GCC $(GCC_VERSION).)
endif

AUTOCONF_VERSION_STRING = "autoconf (GNU Autoconf) $(AUTOCONF_VERSION)"
ifeq ($(shell autoconf -V | grep $(AUTOCONF_VERSION_STRING)),)
  ifeq ($(shell which autoconf$(AUTOCONF_VERSION)),)
    ifneq ($(shell which autoconf-$(AUTOCONF_VERSION)),)
      AUTOCONF = autoconf-$(AUTOCONF_VERSION)
    endif
  else
    AUTOCONF = autoconf$(AUTOCONF_VERSION)
  endif
else
  AUTOCONF = autoconf
endif

AUTOCONFINST_OK = $(call check_nonempty_f,$(AUTOCONF),\
                    Need to have 'autoconf-$(AUTOCONF_VERSION)' installed.)

#
# Check if 'libncurses' is installed
#
CURSES_OK = $(call check_equal_f,\
              $(shell $(LD) -lncurses -e0 -o /tmp/a.out && echo ok),ok,\
              Need to have 'libncurses' installed.)

#
# Check if 'texinfo' is installed
#
TEXINFO_OK = $(call check_nonempty_f,$(shell which texi2pdf),\
               Need to have 'texinfo' installed.)

#
# Check if 'wget' is installed
#
WGET_OK = $(call check_nonempty_f,$(shell which wget),\
            Need to have 'wget' installed.)

#
# Check if 'autogen' is installed
#
AUTOGEN_OK = $(call check_nonempty_f,$(shell which autogen),\
               Need to have 'autogen' installed.)

#
# Check if 'gpg' is installed
#
GPG_OK = $(call check_nonempty_f,$(shell which gpg),\
           Need to have 'gpg' installed.)

TOOLS_OK = $(AUTOCONF_OK) $(AUTOCONFINST_OK) $(CURSES_OK) \
           $(TEXINFO_OK) $(WGET_OK) $(AUTOGEN_OK) $(GPG_OK)

ifneq ($(strip $(TOOLS_OK)),)
$(error Please install missing tools.)
endif

#
# Libc stub
#

LIBC_GEN_SYMLINKS = \
	stdint.h memory.h string.h stdlib.h unistd.h errno.h wchar.h \
	ctype.h strings.h wctype.h math.h stdio.h dlfcn.h inttypes.h \
	malloc.h signal.h fcntl.h assert.h locale.h setjmp.h time.h \
	link.h gnu-versions.h elf.h

LIBC_GEN_SYS_SYMLINKS = types.h stat.h sem.h

LIBC_DIR    = $(shell pwd)/build/libc/include
LIBC_STUB_H = $(GENODE_DIR)/tool/libgcc_libc_stub.h

LIBC = $(addprefix $(LIBC_DIR)/,$(LIBC_GEN_SYMLINKS)) \
       $(addprefix $(LIBC_DIR)/sys/,$(LIBC_GEN_SYS_SYMLINKS))

$(LIBC_DIR) $(LIBC_DIR)/sys:
	$(VERBOSE)mkdir -p $@

$(addprefix $(LIBC_DIR)/,$(LIBC_GEN_SYMLINKS)): $(LIBC_DIR)
	$(VERBOSE)ln -sf $(LIBC_STUB_H) $@

$(addprefix $(LIBC_DIR)/sys/,$(LIBC_GEN_SYS_SYMLINKS)): $(LIBC_DIR)/sys
	$(VERBOSE)ln -sf $(LIBC_STUB_H) $@

#
# 'configure' parameters for binutils, gcc and gdb
#

LOCAL_INSTALL_LOCATION = $(shell pwd)/build/install

#
# Local install location for gmp, mpfr, and mpc libraries. These libraries are
# requried at build time of gcc. We install them locally before invoking the
# gcc build. Because the libs do not need to be included in the tool-chain
# package (they are statically linked against gcc), we install them to a
# different install location as gcc.
#
LOCAL_LIB_INSTALL_LOCATION = $(shell pwd)/build/lib-install

TARGET_NAME_x86        = x86_64-elf
TARGET_NAME_microblaze = microblaze-elf
TARGET_NAME_arm        = arm-elf-eabi

ifneq ($(VERBOSE),)
CONFIG_QUIET = --quiet
MAKEFLAGS   += --quiet
export MAKEFLAGS
endif

COMMON_CONFIG = $(CONFIG_QUIET) \
                --prefix=$(LOCAL_INSTALL_LOCATION) \
                --program-prefix=genode-$(PLATFORM)- \
                --target=$(TARGET_NAME_$(PLATFORM)) \
                --program-transform-name="s/$(TARGET_NAME_$(PLATFORM))/$(PLATFORM)/"

BINUTILS_CONFIG += $(COMMON_CONFIG) --disable-werror

#
# Prevent GNU assembler from treating '/' as the start of a comment. In
# 'gas/config/tc-i386.c', the policy of handling '/' is defined. For Linux, '/'
# is treated as division, which we expect. To apply this needed policy for our
# plain 'elf' version gas, we supply the definition of 'TE_LINUX' by hand.
# Fortunately, this define is not used outside of gas.
#
BINUTILS_CONFIG += CFLAGS=-DTE_LINUX

#
# Add platform-specific binutils configure arguments
#
BINUTILS_CONFIG += $(BINUTILS_CONFIG_$(PLATFORM))

#
# GDB configure arguments
#
GDB_CONFIG += $(COMMON_CONFIG) --disable-werror

#
# Dummy libc symbols to resolve unresolved references when linking
# 'libgcc_s.so'. Even though, this library is not used on Genode, we want the
# link command to succeed to complete the build process.
#
DUMMY_LIBC_SYMS      = strlen free memcpy malloc memset abort dl_iterate_phdr
LD_PREFIX            = -Wl,
LD_DEFSYM_DUMMY_LIBC = $(addprefix $(LD_PREFIX)--defsym=,$(addsuffix =0,$(DUMMY_LIBC_SYMS)))

GCC_CONFIG += $(COMMON_CONFIG) \
              --enable-languages=c,c++,go --disable-libgo \
              --enable-targets=all \
              --with-gnu-as --with-gnu-ld --disable-tls --disable-threads \
              --disable-libstdcxx-pch \
              --enable-shared \
              --enable-multiarch \
              --with-gmp=$(LOCAL_LIB_INSTALL_LOCATION) \
              --with-mpfr=$(LOCAL_LIB_INSTALL_LOCATION) \
              --with-mpc=$(LOCAL_LIB_INSTALL_LOCATION) \
              CPPFLAGS_FOR_TARGET=-I$(LIBC_DIR) \
              CFLAGS_FOR_TARGET="-I$(LIBC_DIR) -nostdlib $(LD_DEFSYM_DUMMY_LIBC) -fPIC"

GCC_CONFIG += $(GCC_CONFIG_$(PLATFORM))

#
# Configure options passed to gcc
#
HOST_CONFIG_ARGS = $(CONFIG_QUIET) \
                   host_xm_include_list=$(LINK_SPEC_H_$(PLATFORM)) \
                   tmake_file='t-slibgcc'

#
# Passed to target components such as libgcc, libstdc++
#
# The 't-slibgcc' tmake file is needed to have libgcc_eh.a built.
# The 't-eh-dw2-dip' tmake file is needed to let the tool chain use 'unwind-dw2-fde-dip.c',
# needed for the exception handling on Genode in the presence of shared libraries.
#
TARGET_CONFIG_ARGS = $(CONFIG_QUIET) \
                     tmake_file='t-crtstuff-pic t-libgcc-pic t-eh-dw2-dip t-slibgcc t-slibgcc-gld t-slibgcc-elf-ver' \
                     extra_parts='crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o'

# compile libsupc++ as position-independent code
TARGET_CONFIG_ARGS += PIC_CXXFLAGS='-prefer-pic'

GCC_INSTALL_RULE = install-strip
ifeq ($(GCC_VERSION),4.4.5)
GCC_INSTALL_RULE = install
endif

#
# Default linker script
#
# Needed only to make target-configure happy.
#

LD_SCRIPT_microblaze = $(LOCAL_INSTALL_LOCATION)/$(TARGET_NAME_microblaze)/lib/xilinx.ld

$(LD_SCRIPT_$(PLATFORM)):
	$(VERBOSE)mkdir -p $(dir $@)
	$(VERBOSE)touch $@

#
# Link spec
#
# The 'LINK_SPEC' define comprises the rules of how the GCC frontend invokes
# the linker.
#

LINK_SPEC_H_x86 = $(shell pwd)/build/$(PLATFORM)/link_spec.h

$(LINK_SPEC_H_x86):
	$(VERBOSE)echo "#define LINK_SPEC \"%{!m32:-m elf_x86_64} %{m32:-m elf_i386} %{shared:-shared} %{!static:--eh-frame-hdr}\"" > $@

$(LINK_SPEC_H_arm):
	$(VERBOSE)echo "#define LINK_SPEC \"%(shared:-shared) %{!static:--eh-frame-hdr}\"" > $@

#
# Platform-specific multilib support
#

MAKE_OPT_x86 := MULTILIB_OPTIONS="m64/m32" MULTILIB_DIRNAMES="64 32"
MAKE_OPT += $(MAKE_OPT_$(PLATFORM))

#
# Build rules and dependencies between build steps
#
# We use the binaries 'objdump' and 'g++' as representatives for expressing
# dependencies. All other programs will be generated as side effect.
#

BINUTILS_BINARIES           = build/$(PLATFORM)/binutils/binutils/objdump
BINUTILS_INSTALLED_BINARIES = $(LOCAL_INSTALL_LOCATION)/bin/genode-$(PLATFORM)-objdump
GCC_BINARIES                = build/$(PLATFORM)/gcc/gcc/g++
GCC_INSTALLED_BINARIES      = $(LOCAL_INSTALL_LOCATION)/bin/genode-$(PLATFORM)-g++
GDB_BINARIES                = build/$(PLATFORM)/gdb/gdb/gdb
GDB_INSTALLED_BINARIES      = $(LOCAL_INSTALL_LOCATION)/bin/genode-$(PLATFORM)-gdb

build_all: $(GCC_INSTALLED_BINARIES) $(GDB_INSTALLED_BINARIES)

$(DOWNLOAD_DIR):
	$(VERBOSE)mkdir -p $@

$(DOWNLOAD_DIR)/$(BINUTILS_DOWNLOAD_TBZ2): $(DOWNLOAD_DIR)
	$(ECHO) "$(BRIGHT_COL)downloading binutils...$(DEFAULT_COL)"
	$(VERBOSE)wget -c -P $(DOWNLOAD_DIR) $(BINUTILS_DOWNLOAD_URL)/$(BINUTILS_DOWNLOAD_TBZ2) && touch $@
	$(VERBOSE)wget -c -P $(DOWNLOAD_DIR) $(BINUTILS_DOWNLOAD_URL)/$(BINUTILS_DOWNLOAD_TBZ2).sig && touch $@
	$(VERBOSE)$(SIGVERIFIER) $(DOWNLOAD_DIR)/$(BINUTILS_DOWNLOAD_TBZ2) $(DOWNLOAD_DIR)/$(BINUTILS_DOWNLOAD_TBZ2).sig GNU

$(DOWNLOAD_DIR)/gcc-$(GCC_VERSION).tar.bz2: $(DOWNLOAD_DIR)
	$(ECHO) "$(BRIGHT_COL)downloading gcc...$(DEFAULT_COL)"
	$(VERBOSE)wget -c -P $(DOWNLOAD_DIR) $(GCC_DOWNLOAD_URL)/gcc-$(GCC_VERSION)/gcc-$(GCC_VERSION).tar.bz2 && touch $@
	$(VERBOSE)wget -c -P $(DOWNLOAD_DIR) $(GCC_DOWNLOAD_URL)/gcc-$(GCC_VERSION)/gcc-$(GCC_VERSION).tar.bz2.sig && touch $@
	$(VERBOSE)$(SIGVERIFIER) $(DOWNLOAD_DIR)/gcc-$(GCC_VERSION).tar.bz2 $(DOWNLOAD_DIR)/gcc-$(GCC_VERSION).tar.bz2.sig GNU

$(DOWNLOAD_DIR)/gmp-$(GMP_VERSION).tar.bz2: $(DOWNLOAD_DIR)
	$(ECHO) "$(BRIGHT_COL)downloading gmp...$(DEFAULT_COL)"
	$(VERBOSE)wget -c -P $(DOWNLOAD_DIR) $(GMP_DOWNLOAD_URL)/gmp-$(GMP_VERSION).tar.bz2 && touch $@
	$(VERBOSE)wget -c -P $(DOWNLOAD_DIR) $(GMP_DOWNLOAD_URL)/gmp-$(GMP_VERSION).tar.bz2.sig && touch $@
	$(VERBOSE)$(SIGVERIFIER) $(DOWNLOAD_DIR)/gmp-$(GMP_VERSION).tar.bz2 $(DOWNLOAD_DIR)/gmp-$(GMP_VERSION).tar.bz2.sig GNU

$(DOWNLOAD_DIR)/mpfr-$(MPFR_VERSION).tar.bz2: $(DOWNLOAD_DIR)
	$(ECHO) "$(BRIGHT_COL)downloading mpfr...$(DEFAULT_COL)"
	$(VERBOSE)wget -c -P $(DOWNLOAD_DIR) $(MPFR_DOWNLOAD_URL)/mpfr-$(MPFR_VERSION).tar.bz2 && touch $@
	$(VERBOSE)wget -c -P $(DOWNLOAD_DIR) $(MPFR_DOWNLOAD_URL)/mpfr-$(MPFR_VERSION).tar.bz2.sig && touch $@
	$(VERBOSE)$(SIGVERIFIER) $(DOWNLOAD_DIR)/mpfr-$(MPFR_VERSION).tar.bz2 $(DOWNLOAD_DIR)/mpfr-$(MPFR_VERSION).tar.bz2.sig

$(DOWNLOAD_DIR)/mpc-$(MPC_VERSION).tar.gz: $(DOWNLOAD_DIR)
	$(ECHO) "$(BRIGHT_COL)downloading mpc...$(DEFAULT_COL)"
	$(VERBOSE)wget -c -P $(DOWNLOAD_DIR) $(MPC_DOWNLOAD_URL)/mpc-$(MPC_VERSION).tar.gz && touch $@
	$(VERBOSE)wget -c -P $(DOWNLOAD_DIR) $(MPC_DOWNLOAD_URL)/mpc-$(MPC_VERSION).tar.gz.asc && touch $@
	# GPG key from http://www.multiprecision.org/index.php?prog=mpc&page=download
	$(VERBOSE)$(SIGVERIFIER) $(DOWNLOAD_DIR)/mpc-$(MPC_VERSION).tar.gz $(DOWNLOAD_DIR)/mpc-$(MPC_VERSION).tar.gz.asc AD17A21EF8AED8F1CC02DBD9F7D5C9BF765C61E3

$(CONTRIB_DIR)/gmp-$(GMP_VERSION)/configure: $(DOWNLOAD_DIR)/gmp-$(GMP_VERSION).tar.bz2
	$(ECHO) "$(BRIGHT_COL)unpacking gmp...$(DEFAULT_COL)"
	$(VERBOSE)tar xfj $< -C $(CONTRIB_DIR)

$(CONTRIB_DIR)/mpfr-$(MPFR_VERSION)/configure: $(DOWNLOAD_DIR)/mpfr-$(MPFR_VERSION).tar.bz2
	$(ECHO) "$(BRIGHT_COL)unpacking mpfr...$(DEFAULT_COL)"
	$(VERBOSE)tar xfj $< -C $(CONTRIB_DIR)

$(CONTRIB_DIR)/mpc-$(MPC_VERSION)/configure: $(DOWNLOAD_DIR)/mpc-$(MPC_VERSION).tar.gz
	$(ECHO) "$(BRIGHT_COL)unpacking mpc...$(DEFAULT_COL)"
	$(VERBOSE)tar xfz $< -C $(CONTRIB_DIR)

$(CONTRIB_DIR)/gcc-$(GCC_VERSION): $(addprefix $(DOWNLOAD_DIR)/,gcc-$(GCC_VERSION).tar.bz2)
	$(ECHO) "$(BRIGHT_COL)unpacking gcc...$(DEFAULT_COL)"
	$(VERBOSE)mkdir -p $(CONTRIB_DIR)
	$(VERBOSE)for i in $^ ; do tar xfj $$i -C $(CONTRIB_DIR) ;done
	$(VERBOSE)touch $@

include $(GENODE_DIR)/tool/tool_chain_gcc_patches.inc

$(CONTRIB_DIR)/binutils-$(BINUTILS_VERSION)/configure: $(DOWNLOAD_DIR)/$(BINUTILS_DOWNLOAD_TBZ2)
	$(ECHO) "$(BRIGHT_COL)unpacking binutils...$(DEFAULT_COL)"
	$(VERBOSE)mkdir -p $(CONTRIB_DIR)
	$(VERBOSE)tar xfj $^ -C $(CONTRIB_DIR) && touch $@

build/$(PLATFORM)/binutils/Makefile: $(CONTRIB_DIR)/binutils-$(BINUTILS_VERSION)/configure
	$(ECHO) "$(BRIGHT_COL)configuring binutils...$(DEFAULT_COL)"
	$(VERBOSE)mkdir -p $(dir $@)
	$(VERBOSE)cd $(dir $@); ../../../$(CONTRIB_DIR)/binutils-$(BINUTILS_VERSION)/configure $(BINUTILS_CONFIG)

$(BINUTILS_BINARIES): build/$(PLATFORM)/binutils/Makefile
	$(ECHO) "$(BRIGHT_COL)builing binutils...$(DEFAULT_COL)"
	$(VERBOSE)$(MAKE) -C $(dir $<) $(MAKE_OPT)

$(BINUTILS_INSTALLED_BINARIES): $(BINUTILS_BINARIES)
	$(ECHO) "$(BRIGHT_COL)installing binutils...$(DEFAULT_COL)"
	$(VERBOSE)for i in binutils gas ld intl opcodes; do \
		$(MAKE) -C build/$(PLATFORM)/binutils/$$i install-strip; done
	$(VERBOSE)$(MAKE) -C build/$(PLATFORM)/binutils/libiberty install

COMMON_LIB_CONFIG = --prefix=$(LOCAL_LIB_INSTALL_LOCATION) \
                    --disable-shared --enable-static

GMP_CONFIG  = $(COMMON_LIB_CONFIG)
MPFR_CONFIG = $(COMMON_LIB_CONFIG) --with-gmp=$(LOCAL_LIB_INSTALL_LOCATION)
MPC_CONFIG  = $(COMMON_LIB_CONFIG) --with-gmp=$(LOCAL_LIB_INSTALL_LOCATION) \
                                   --with-mpfr=$(LOCAL_LIB_INSTALL_LOCATION)

$(LOCAL_LIB_INSTALL_LOCATION)/lib/libgmp.a:  build/gmp/Makefile
$(LOCAL_LIB_INSTALL_LOCATION)/lib/libmpfr.a: build/mpfr/Makefile
$(LOCAL_LIB_INSTALL_LOCATION)/lib/libmpc.a:  build/mpc/Makefile

# rule to build libgmp, libmpfr, and libmpc
$(LOCAL_LIB_INSTALL_LOCATION)/lib/lib%.a:
	$(ECHO) "$(BRIGHT_COL)building lib$*...$(DEFAULT_COL)"
	$(VERBOSE)make -C build/$* all install

build/gmp/Makefile: $(CONTRIB_DIR)/gmp-$(GMP_VERSION)/configure

build/gmp/Makefile:
	$(ECHO) "$(BRIGHT_COL)configuring libgmp...$(DEFAULT_COL)"
	$(VERBOSE)mkdir -p $(dir $@)
	$(VERBOSE)cd $(dir $@); \
		../../$(CONTRIB_DIR)/gmp-$(GMP_VERSION)/configure $(GMP_CONFIG)

build/mpfr/Makefile: $(CONTRIB_DIR)/mpfr-$(MPFR_VERSION)/configure \
                     $(LOCAL_LIB_INSTALL_LOCATION)/lib/libgmp.a

build/mpfr/Makefile:
	$(ECHO) "$(BRIGHT_COL)configuring libmpfr...$(DEFAULT_COL)"
	$(VERBOSE)mkdir -p $(dir $@)
	$(VERBOSE)cd $(dir $@); \
		../../$(CONTRIB_DIR)/mpfr-$(MPFR_VERSION)/configure $(MPFR_CONFIG)

build/mpc/Makefile: $(CONTRIB_DIR)/mpc-$(MPC_VERSION)/configure \
                    $(LOCAL_LIB_INSTALL_LOCATION)/lib/libgmp.a \
                    $(LOCAL_LIB_INSTALL_LOCATION)/lib/libmpfr.a

build/mpc/Makefile:
	$(ECHO) "$(BRIGHT_COL)configuring libmpc...$(DEFAULT_COL)"
	$(VERBOSE)mkdir -p $(dir $@)
	$(VERBOSE)cd $(dir $@); \
		../../$(CONTRIB_DIR)/mpc-$(MPC_VERSION)/configure $(MPC_CONFIG)

build/$(PLATFORM)/gcc/Makefile: $(CONTRIB_DIR)/gcc-$(GCC_VERSION)/configure \
                                $(BINUTILS_INSTALLED_BINARIES) \
                                $(LOCAL_LIB_INSTALL_LOCATION)/lib/libgmp.a \
                                $(LOCAL_LIB_INSTALL_LOCATION)/lib/libmpfr.a \
                                $(LOCAL_LIB_INSTALL_LOCATION)/lib/libmpc.a

build/$(PLATFORM)/gcc/Makefile:
	$(ECHO) "$(BRIGHT_COL)configuring gcc...$(DEFAULT_COL)"
	$(VERBOSE)mkdir -p $(dir $@)
	$(VERBOSE)cd $(dir $@); \
		host_configargs="$(HOST_CONFIG_ARGS)" \
		target_configargs="$(TARGET_CONFIG_ARGS)" \
		../../../$(CONTRIB_DIR)/gcc-$(GCC_VERSION)/configure $(GCC_CONFIG)

$(GCC_BINARIES): build/$(PLATFORM)/gcc/Makefile \
                 $(LINK_SPEC_H_$(PLATFORM)) \
                 $(LD_SCRIPT_$(PLATFORM)) \
                 $(LIBC)

$(GCC_BINARIES): build/$(PLATFORM)/gcc/Makefile
	$(ECHO) "$(BRIGHT_COL)builing gcc...$(DEFAULT_COL)"
	$(VERBOSE)$(MAKE) -C $(dir $<) $(MAKE_OPT)

$(GCC_INSTALLED_BINARIES): $(GCC_BINARIES)
	$(ECHO) "$(BRIGHT_COL)installing gcc...$(DEFAULT_COL)"
	$(VERBOSE)$(MAKE) -C build/$(PLATFORM)/gcc $(GCC_INSTALL_RULE)

$(DOWNLOAD_DIR)/gdb-$(GDB_VERSION).tar.bz2: $(DOWNLOAD_DIR)
	$(ECHO) "$(BRIGHT_COL)downloading gdb...$(DEFAULT_COL)"
	$(VERBOSE)wget -c -P $(DOWNLOAD_DIR) $(GDB_DOWNLOAD_URL)/gdb-$(GDB_VERSION).tar.bz2 && touch $@
	$(VERBOSE)wget -c -P $(DOWNLOAD_DIR) $(GDB_DOWNLOAD_URL)/gdb-$(GDB_VERSION).tar.bz2.sig && touch $@
	$(VERBOSE)$(SIGVERIFIER) $(DOWNLOAD_DIR)/gdb-$(GDB_VERSION).tar.bz2 $(DOWNLOAD_DIR)/gdb-$(GDB_VERSION).tar.bz2.sig GNU

$(CONTRIB_DIR)/gdb-$(GDB_VERSION): $(DOWNLOAD_DIR)/gdb-$(GDB_VERSION).tar.bz2
	$(ECHO) "$(BRIGHT_COL)unpacking gdb...$(DEFAULT_COL)"
	$(VERBOSE)mkdir -p $(CONTRIB_DIR)
	$(VERBOSE)tar xfj $^ -C $(CONTRIB_DIR) && touch $@

include $(GENODE_DIR)/tool/tool_chain_gdb_patches.inc

build/$(PLATFORM)/gdb/Makefile: $(CONTRIB_DIR)/gdb-$(GDB_VERSION)/configure
	$(ECHO) "$(BRIGHT_COL)configuring gdb...$(DEFAULT_COL)"
	$(VERBOSE)mkdir -p $(dir $@)
	$(VERBOSE)cd $(dir $@); \
		../../../$(CONTRIB_DIR)/gdb-$(GDB_VERSION)/configure $(GDB_CONFIG)

$(GDB_BINARIES): build/$(PLATFORM)/gdb/Makefile
	$(ECHO) "$(BRIGHT_COL)builing gdb...$(DEFAULT_COL)"
	$(VERBOSE)$(MAKE) -C $(dir $<) $(MAKE_OPT)

$(GDB_INSTALLED_BINARIES): $(GDB_BINARIES)
	$(ECHO) "$(BRIGHT_COL)installing gdb...$(DEFAULT_COL)"
	$(VERBOSE)$(MAKE) -C build/$(PLATFORM)/gdb install MAKEINFO=true

#
# Clean rules
#

clean:
	rm -rf $(addprefix $(CONTRIB_DIR)/,binutils-$(BINUTILS_VERSION) gcc-$(GCC_VERSION))
	rm -rf build

cleanall: clean
	rm -rf $(DOWNLOAD_DIR)/$(BINUTILS_DOWNLOAD_TBZ2)
	rm -rf $(DOWNLOAD_DIR)/gcc-$(GCC_VERSION).tar.bz2

#
# Install rules
#

install: build_all
	$(ECHO) "$(BRIGHT_COL)installing tool chain to '$(INSTALL_LOCATION)'...$(DEFAULT_COL)"
	$(VERBOSE)sudo cp -a --remove-destination --no-target-directory $(LOCAL_INSTALL_LOCATION) $(INSTALL_LOCATION)