#

# Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.

# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

#

# This code is free software; you can redistribute it and/or modify it

# under the terms of the GNU General Public License version 2 only, as

# published by the Free Software Foundation.  Oracle designates this

# particular file as subject to the "Classpath" exception as provided

# by Oracle in the LICENSE file that accompanied this code.

#

# This code is distributed in the hope that it will be useful, but WITHOUT

# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

# version 2 for more details (a copy is included in the LICENSE file that

# accompanied this code).

#

# You should have received a copy of the GNU General Public License version

# 2 along with this work; if not, write to the Free Software Foundation,

# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

#

# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

# or visit www.oracle.com if you need additional information or have any

# questions.

#

##########################################################################################

#

# Workhorse makefile for creating ONE cross compiler

# Needs either to be from BUILD -> BUILD OR have 

# BUILD -> HOST prebuilt

#

# NOTE: There is a bug here. We don't limit the 

# PATH when building BUILD -> BUILD, which means that 

# if you configure after you've once build the BUILD->BUILD

# compiler THAT one will be picked up as the compiler for itself.

# This is not so great, especially if you did a partial delete

# of the target tree. 

#

# Fix this...

#

$(info TARGET=$(TARGET))

$(info HOST=$(HOST))

$(info BUILD=$(BUILD))

ARCH		:= $(word 1,$(subst -, ,$(TARGET)))

##########################################################################################

# Define external dependencies

# Latest that could be made to work.

gcc_ver		:= gcc-4.7.3

binutils_ver	:= binutils-2.22

ccache_ver	:= ccache-3.1.9

mpfr_ver        := mpfr-3.0.1

gmp_ver         := gmp-4.3.2

mpc_ver		:= mpc-1.0.1

GCC		:= http://ftp.gnu.org/pub/gnu/gcc/$(gcc_ver)/$(gcc_ver).tar.bz2

BINUTILS	:= http://ftp.gnu.org/pub/gnu/binutils/$(binutils_ver).tar.bz2

CCACHE		:= http://samba.org/ftp/ccache/$(ccache_ver).tar.gz

MPFR		:= http://www.mpfr.org/${mpfr_ver}/${mpfr_ver}.tar.bz2

GMP 		:= http://ftp.gnu.org/pub/gnu/gmp/${gmp_ver}.tar.bz2

MPC		:= http://www.multiprecision.org/mpc/download/${mpc_ver}.tar.gz

# RPMs in OEL5.5

RPM_LIST 	:= \

		kernel-headers \

		glibc-2 glibc-headers glibc-devel \

		cups-libs cups-devel \

		libX11 libX11-devel \

		xorg-x11-proto-devel \

		alsa-lib alsa-lib-devel \

		libXext libXext-devel \

		libXtst libXtst-devel \

		libXrender libXrender-devel \

		freetype freetype-devel \

		libXt libXt-devel \

		libSM libSM-devel \

		libICE libICE-devel \

		libXi libXi-devel \

		libXdmcp libXdmcp-devel \

		libXau libXau-devel \

		libgcc

ifeq ($(ARCH),x86_64)

  RPM_DIR ?= $(RPM_DIR_x86_64)

  RPM_ARCHS := x86_64

  ifeq ($(BUILD),$(HOST))

    ifeq ($(TARGET),$(HOST))

      # When building the native compiler for x86_64, enable mixed mode.

      RPM_ARCHS	+= i386 i686

    endif

  endif

else

  RPM_DIR ?= $(RPM_DIR_i686)

  RPM_ARCHS := i386 i686

endif

# Sort to remove duplicates

RPM_FILE_LIST := $(sort $(foreach a,$(RPM_ARCHS),$(wildcard $(patsubst %,$(RPM_DIR)/%*$a.rpm,$(RPM_LIST)))))

ifeq ($(RPM_FILE_LIST),)

  $(error Found no RPMs, RPM_DIR must point to list of directories to search for RPMs)

endif

##########################################################################################

# Define common directories and files

# Ensure we have 32-bit libs also for x64. We enable mixed-mode.

ifeq (x86_64,$(ARCH))

  LIBDIRS	:= lib64 lib

  CFLAGS_lib	:= -m32

else

  LIBDIRS 	:= lib

endif

# Define directories

RESULT		:= $(OUTPUT_ROOT)/result

BUILDDIR	:= $(OUTPUT_ROOT)/$(HOST)/$(TARGET)

PREFIX		:= $(RESULT)/$(HOST)

TARGETDIR	:= $(PREFIX)/$(TARGET)

SYSROOT		:= $(TARGETDIR)/sys-root

DOWNLOAD	:= $(OUTPUT_ROOT)/download

SRCDIR		:= $(OUTPUT_ROOT)/src

# Marker file for unpacking rpms

rpms		:= $(SYSROOT)/rpms_unpacked

# Need to patch libs that are linker scripts to use non-absolute paths 

libs		:= $(SYSROOT)/libs_patched

##########################################################################################

# Unpack source packages

# Generate downloading + unpacking of sources. 

define Download

$(1)_DIR	= $(abspath $(SRCDIR)/$(basename $(basename $(notdir $($(1))))))

$(1)_CFG	= $$($(1)_DIR)/configure

$(1)_FILE	= $(DOWNLOAD)/$(notdir $($(1)))

$$($(1)_CFG)	: $$($(1)_FILE)

		mkdir -p $$(SRCDIR)

		tar -C $$(SRCDIR) -x$$(if $$(findstring .gz, $$<),z,j)f $$<

		$$(foreach p,$$(abspath $$(wildcard $$(notdir $$($(1)_DIR)).patch)),	\

			echo PATCHING $$(p) ;						\

			patch -d $$($(1)_DIR) -p1 -i $$(p) ; 				\

			)

		touch $$@

$$($(1)_FILE)	:

		wget -P $(DOWNLOAD) $$($(1))

endef

# Download and unpack all source packages

$(foreach p,GCC BINUTILS CCACHE MPFR GMP MPC,$(eval $(call Download,$(p))))

##########################################################################################

# Unpack RPMS

# Note. For building linux you should install rpm2cpio. 

define unrpm

$(SYSROOT)/$(notdir $(1)).unpacked	\

		: $(1)

$$(rpms)	: $(SYSROOT)/$(notdir $(1)).unpacked

endef

%.unpacked	:

		$(info Unpacking target rpms and libraries from $<)

		@(mkdir -p $(@D);					\

		cd $(@D);						\

		rpm2cpio $< | 						\

			cpio --extract --make-directories 		\

				-f 					\

				"./usr/share/doc/*" 			\

				"./usr/share/man/*"			\

				"./usr/X11R6/man/*" 			\

				"*/X11/locale/*"			\

				|| die ; )

		touch $@

$(foreach p,$(RPM_FILE_LIST),$(eval $(call unrpm,$(p))))

##########################################################################################

# Note: MUST create a <sys-root>/usr/lib even if not really needed. 

# gcc will use a path relative to it to resolve lib64. (x86_64). 

# we're creating multi-lib compiler with 32bit libc as well, so we should 

# have it anyway, but just to make sure...

# Patch libc.so and libpthread.so to force linking against libraries in sysroot

# and not the ones installed on the build machine.

$(libs)		: $(rpms)

		@echo Patching libc and pthreads

		@(for f in `find $(SYSROOT) -name libc.so -o -name libpthread.so`; do \

			(cat $$f | sed -e 's|/usr/lib64/||g' 		\

				       -e 's|/usr/lib/||g'		\

				       -e 's|/lib64/||g'		\

				       -e 's|/lib/||g' ) > $$f.tmp ;	\

			mv $$f.tmp $$f				;	\

		done)

		@mkdir -p $(SYSROOT)/usr/lib

		@touch $@

##########################################################################################

# Define marker files for each source package to be compiled

$(foreach t,binutils mpfr gmp mpc gcc ccache,$(eval $(t) = $(TARGETDIR)/$($(t)_ver).done))

##########################################################################################

# Default base config

CONFIG		= --target=$(TARGET) 					\

			--host=$(HOST) --build=$(BUILD)			\

			--prefix=$(PREFIX)

PATHEXT 	= $(RESULT)/$(BUILD)/bin:

PATHPRE		= PATH=$(PATHEXT)$(PATH)

BUILDPAR	= -j16

# Default commands to when making

MAKECMD		=

INSTALLCMD	= install

declare_tools   = CC$(1)=$(2)gcc LD$(1)=$(2)ld AR$(1)=$(2)ar AS$(1)=$(2)as RANLIB$(1)=$(2)ranlib CXX$(1)=$(2)g++ OBJDUMP$(1)=$(2)objdump

ifeq ($(HOST),$(BUILD))

ifeq ($(HOST),$(TARGET))

TOOLS		= $(call declare_tools,_FOR_TARGET,)

endif

endif

TOOLS		?=  $(call declare_tools,_FOR_TARGET,$(TARGET)-)

##########################################################################################

# Create a TARGET bfd + libiberty only. 

# Configure one or two times depending on mulitlib arch.

# If multilib, the second should be 32-bit, and we resolve 

# CFLAG_<name> to most likely -m32.

define mk_bfd

$$(info Libs for $(1)) 

$$(BUILDDIR)/$$(binutils_ver)-$(subst /,-,$(1))/Makefile \

		: CFLAGS += $$(CFLAGS_$(1))

$$(BUILDDIR)/$$(binutils_ver)-$(subst /,-,$(1))/Makefile \

		: LIBDIRS = --libdir=$(TARGETDIR)/$(1)

bfdlib		+= $$(TARGETDIR)/$$(binutils_ver)-$(subst /,-,$(1)).done

bfdmakes	+= $$(BUILDDIR)/$$(binutils_ver)-$(subst /,-,$(1))/Makefile

endef

# Create one set of bfds etc for each multilib arch

$(foreach l,$(LIBDIRS),$(eval $(call mk_bfd,$(l))))

# Only build these two libs.

$(bfdlib)	: MAKECMD 	= all-libiberty all-bfd

$(bfdlib)	: INSTALLCMD 	= install-libiberty install-bfd

# Building targets libbfd + libiberty. HOST==TARGET, i.e not 

# for a cross env. 

$(bfdmakes)	: CONFIG = --target=$(TARGET) 				\

			--host=$(TARGET) --build=$(BUILD)		\

			--prefix=$(TARGETDIR) 				\

			--with-sysroot=$(SYSROOT) 			\

			$(LIBDIRS)

$(bfdmakes)	: TOOLS = $(call declare_tools,_FOR_TARGET,$(TARGET)-) $(call declare_tools,,$(TARGET)-)

##########################################################################################

$(gcc)		\

$(binutils)	\

$(gmp)		\

$(mpfr)		\

$(mpc)		\

$(bfdmakes)	\

$(ccache)	: ENVS += $(TOOLS)

# libdir to work around hateful bfd stuff installing into wrong dirs...

# ensure we have 64 bit bfd support in the HOST library. I.e our 

# compiler on i686 will know 64 bit symbols, BUT later

# we build just the libs again for TARGET, then with whatever the arch 

# wants.

$(BUILDDIR)/$(binutils_ver)/Makefile : CONFIG += --enable-64-bit-bfd --libdir=$(PREFIX)/$(word 1,$(LIBDIRS))

# Makefile creation. Simply run configure in build dir.

$(bfdmakes)				\

$(BUILDDIR)/$(binutils_ver)/Makefile	\

		: $(BINUTILS_CFG)

		$(info Configuring $@. Log in $(@D)/log.config)

		@mkdir -p $(@D)

		(						\

			cd $(@D) ;				\

			$(PATHPRE) $(ENVS) CFLAGS="$(CFLAGS)"	\

				$(BINUTILS_CFG) 		\

				$(CONFIG) 			\

				--with-sysroot=$(SYSROOT)	\

				--disable-nls			\

				--program-prefix=$(TARGET)-	\

				--enable-multilib		\

		) > $(@D)/log.config 2>&1

		@echo 'done'

$(BUILDDIR)/$(mpfr_ver)/Makefile	\

		: $(MPFR_CFG)

		$(info Configuring $@. Log in $(@D)/log.config)

		@mkdir -p $(@D)

		(						\

			cd $(@D) ;				\

			$(PATHPRE) $(ENVS) CFLAGS="$(CFLAGS)"	\

				$(MPFR_CFG) 			\

				$(CONFIG) 			\

				--program-prefix=$(TARGET)-	\

				--enable-shared=no		\

				--with-gmp=$(PREFIX)	\

		) > $(@D)/log.config 2>&1

		@echo 'done'

$(BUILDDIR)/$(gmp_ver)/Makefile	\

		: $(GMP_CFG)

		$(info Configuring $@. Log in $(@D)/log.config)

		@mkdir -p $(@D)

		(						\

			cd $(@D) ;				\

			$(PATHPRE) $(ENVS) CFLAGS="$(CFLAGS)"	\

				$(GMP_CFG) 			\

				--host=$(HOST) --build=$(BUILD)	\

				--prefix=$(PREFIX)		\

				--disable-nls			\

				--program-prefix=$(TARGET)-	\

				--enable-shared=no		\

				--with-mpfr=$(PREFIX)	\

		) > $(@D)/log.config 2>&1

		@echo 'done'

$(BUILDDIR)/$(mpc_ver)/Makefile	\

		: $(MPC_CFG)

		$(info Configuring $@. Log in $(@D)/log.config)

		@mkdir -p $(@D)

		(						\

			cd $(@D) ;				\

			$(PATHPRE) $(ENVS) CFLAGS="$(CFLAGS)"	\

				$(MPC_CFG) 			\

				$(CONFIG) 			\

				--program-prefix=$(TARGET)-	\

				--enable-shared=no		\

				--with-mpfr=$(PREFIX)	\

				--with-gmp=$(PREFIX)	\

		) > $(@D)/log.config 2>&1

		@echo 'done'

# Only valid if glibc target -> linux

# proper destructor handling for c++

ifneq (,$(findstring linux,$(TARGET)))

$(BUILDDIR)/$(gcc_ver)/Makefile : CONFIG += --enable-__cxa_atexit 

endif

# Want:

# 	c,c++

# 	shared libs

#	multilib (-m32/-m64 on x64)

# 	skip native language. 

#	and link and assemble with the binutils we created 

#	earlier, so --with-gnu*

$(BUILDDIR)/$(gcc_ver)/Makefile	\

		: $(GCC_CFG) 

		$(info Configuring $@. Log in $(@D)/log.config)

		mkdir -p $(@D)

		(						\

			cd $(@D) ;				\

			$(PATHPRE) $(ENVS) $(GCC_CFG) $(EXTRA_CFLAGS) \

				$(CONFIG) 			\

				--with-sysroot=$(SYSROOT)	\

				--enable-languages=c,c++ 	\

				--enable-shared			\

				--enable-multilib		\

				--disable-nls			\

				--with-gnu-as 			\

				--with-gnu-ld			\

				--with-mpfr=$(PREFIX)		\

				--with-gmp=$(PREFIX)		\

				--with-mpc=$(PREFIX)		\

		) > $(@D)/log.config 2>&1

		@echo 'done'

# need binutils for gcc

$(gcc)		: $(binutils) 

# as of 4.3 or so need these for doing config

$(BUILDDIR)/$(gcc_ver)/Makefile : $(gmp) $(mpfr) $(mpc)

$(mpfr)		: $(gmp)

$(mpc)		: $(gmp) $(mpfr)

##########################################################################################

# very straightforward. just build a ccache. it is only for host. 

$(BUILDDIR)/$(ccache_ver)/Makefile	\

		: $(CCACHE_CFG)

		$(info Configuring $@. Log in $(@D)/log.config)

		@mkdir -p $(@D)

		@(						\

			cd $(@D) ;				\

			$(PATHPRE) $(ENVS) $(CCACHE_CFG)	\

				$(CONFIG) 			\

		) > $(@D)/log.config 2>&1

		@echo 'done'

gccpatch	= $(TARGETDIR)/gcc-patched

##########################################################################################

# For some reason cpp is not created as a target-compiler 

ifeq ($(HOST),$(TARGET))

$(gccpatch)	: $(gcc) link_libs

		@echo -n 'Creating compiler symlinks...'

		@for f in cpp; do 				\

			if [ ! -e $(PREFIX)/bin/$(TARGET)-$$f ];\

			then					\

			cd $(PREFIX)/bin && 			\

				ln -s $$f $(TARGET)-$$f ;	\

			fi					\

		done

		@touch $@

		@echo 'done'

##########################################################################################

# Ugly at best. Seems that when we compile host->host compiler, that are NOT

# the BUILD compiler, the result will not try searching for libs in package root.

# "Solve" this by create links from the target libdirs to where they are. 

link_libs:

		@echo -n 'Creating library symlinks...'

		@$(foreach l,$(LIBDIRS),							\

		for f in `cd $(PREFIX)/$(l) && ls`; do 						\

			if [ ! -e $(TARGETDIR)/$(l)/$$f ]; then					\

				mkdir -p $(TARGETDIR)/$(l) &&					\

				cd $(TARGETDIR)/$(l)/ && 					\

				ln -s $(if $(findstring /,$(l)),../,)../../$(l)/$$f $$f;	\

			fi									\

		done;) 

		@echo 'done'

else

$(gccpatch)	:

		@echo 'done'

endif

##########################################################################################

# Build in two steps. 

# make <default>

# make install. 

# Use path to our build hosts cross tools

# Always need to build cross tools for build host self. 

$(TARGETDIR)/%.done : $(BUILDDIR)/%/Makefile 

		$(info Building $(basename $@). Log in $(<D)/log.build)

		$(PATHPRE) $(ENVS) $(MAKE) $(BUILDPAR) -f $< -C $(<D) $(MAKECMD) $(MAKECMD.$(notdir $@)) > $(<D)/log.build 2>&1

		@echo -n 'installing...'

		$(PATHPRE) $(MAKE) $(INSTALLPAR) -f $< -C $(<D) $(INSTALLCMD) $(MAKECMD.$(notdir $@))  > $(<D)/log.install 2>&1

		@touch $@

		@echo 'done'

##########################################################################################

bfdlib		: $(bfdlib)

binutils	: $(binutils)

rpms		: $(rpms)

libs		: $(libs)

sysroot		: rpms libs

gcc		: sysroot $(gcc) $(gccpatch)

all		: binutils gcc bfdlib

# this is only built for host. so separate. 

ccache		: $(ccache)

.PHONY		: gcc all binutils bfdlib link_libs rpms libs sysroot