#=----------------------------------------------------------------------------=#
#                        OS/K CROSS COMPILER BUILDER                           #
#                                                                              #
#   Desc:   Project Makefile                                                   #
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#                                                                              #
#   Copyright © 2018-2020 The OS/K Team                                        #
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#   This file is part of OS/K.                                                 #
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#   OS/K is free software: you can redistribute it and/or modify               #
#   it under the terms of the GNU General Public License as published by       #
#   the Free Software Foundation, either version 3 of the License, or          #
#   any later version.                                                         #
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#   OS/K 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 for more details.                               #
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#   along with OS/K.  If not, see <https://www.gnu.org/licenses/>.             #
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.PHONY: retrieve compile showenv deflate clean  cross-cc
.DEFAULT_GOAL := cross-cc


## VERSIONS ------------------------------------------------------------------ #


GCC_NAME =gcc-10.1.0
BINUTILS_NAME =binutils-2.34
# GCC 10.1.0
GCC_SOURCES = https://ftp.gnu.org/gnu/gcc/$(GCC_NAME)/$(GCC_NAME).tar.xz
# BINUTILS 2.34
BINUTILS_SOURCES = https://ftp.gnu.org/gnu/binutils/$(BINUTILS_NAME).tar.xz


## VARIABLES ----------------------------------------------------------------- #

#ENV
export NTHREADS := $(shell nproc)
export PREFIX := $(shell pwd)/cross-cc
export TARGET := x86_64-elf
export PATH := $(PREFIX)/bin:$(PATH)
export XZ_DEFAULTS := -T $(NTHREADS)


GCCTARNAME = gcc.tar.xz
BINUTILSTARNAME = binutils.tar.xz
GCCDIRNAME = gcc-src
BINUTILSDIRNAME = binutils-src

# Color codes
CL='\033[0;32m'
CL2='\033[1;36m'
CL3='\033[0m'
NC='\033[1;37m'


## RECIPES ------------------------------------------------------------------- #

showenv:
	@echo Installation path prefix : $(PREFIX)
	@echo Installation path : $(PATH)
	@echo Target : $(TARGET)
	@echo Thread number : $(NTHREADS)

$(GCCTARNAME):
	@echo ${CL2}[$@] ${NC}Downloading GCC sources...${CL3}
	@wget $(GCC_SOURCES) -O $(GCCTARNAME) -q -c --show-progress
	@echo ${CL2}[$@] ${CL}Success.${CL3}

$(BINUTILSTARNAME):
	@echo ${CL2}[$@] ${NC}Downloading BINUTILS sources...${CL3}
	@wget $(BINUTILS_SOURCES) -O $(BINUTILSTARNAME) -q -c --show-progress
	@echo ${CL2}[$@] ${CL}Success.${CL3}	

./build-binutils: $(BINUTILSTARNAME)
	@echo ${CL2}[$@] ${NC}Deflate $(BINUTILS_NAME) sources...${CL3}
	@tar -xaf $(BINUTILSTARNAME) --skip-old-files
	@echo ${CL2}[$@] ${CL}Success.${CL3}
	@echo ${CL2}[$@] ${NC}Configuring $(BINUTILS_NAME)...${CL3}
	@mkdir -p build-binutils
	cd build-binutils && ../$(BINUTILS_NAME)/configure --target=$(TARGET) --prefix="$(PREFIX)" --with-sysroot --disable-nls --disable-werror
	@echo ${CL2}[$@] ${CL}Success.${CL3}

$(PREFIX)/bin/x86_64-elf-objcopy: ./build-binutils
	@echo ${CL2}[$@] ${NC}Compiling $(BINUTILS_NAME)...${CL3}
	cd build-binutils && make -j $(NTHREADS)
	@echo ${CL2}[$@] ${NC}Compiling $(BINUTILS_NAME)...${CL3}
	@mkdir -p cross-cc
	cd build-binutils && make install -j $(NTHREADS)
	@echo ${CL2}[$@] ${CL}Success.${CL3}

./build-gcc: $(GCCTARNAME)
	@echo ${CL2}[$@] ${NC}Deflate $(GCC_NAME) sources...${CL3}
	@tar -xaf $(GCCTARNAME) --skip-old-files
	@echo ${CL2}[$@] ${CL}Success.${CL3}
	@echo ${CL2}[$@] ${NC}Configuring $(GCC_NAME)...${CL3}
	@cp multilib.opt $(GCC_NAME)/gcc/config/i386/t-x86_64-elf
	@patch $(GCC_NAME)/gcc/config.gcc < patch-red-zone.diff
	@mkdir -p build-gcc
	cd build-gcc && ../$(GCC_NAME)/configure --target=$(TARGET) --prefix="$(PREFIX)" --disable-nls --enable-languages=c,c++ --without-headers
	@echo ${CL2}[$@] ${CL}Success.${CL3}

$(PREFIX)/bin/x86_64-elf-gcc: $(PREFIX)/bin/x86_64-elf-objcopy ./build-gcc
	@echo ${CL2}[$@] ${NC}Compiling $(GCC_NAME)...${CL3}
	cd build-gcc && make all-gcc -j $(NTHREADS)
	cd build-gcc && make all-target-libgcc -j $(NTHREADS)
	@mkdir -p cross-cc
	cd build-gcc && make install-gcc -j $(NTHREADS)
	cd build-gcc && make install-target-libgcc -j $(NTHREADS)
	@echo ${CL2}[$@] ${CL}The cross compiler has been successfully compiled.${CL3}
	@echo It is located in the cross-cc subdirectory.

clean:
	@mkdir -p build-gcc build-binutils
	@rm -rf build-gcc
	@rm -rf build-binutils
	@rm -rf cross-cc
	-@rm -rf $(GCC_NAME)/gcc/config/i386/t-x86_64-elf
	-@echo ${CL2}[$@] ${CL}Success.${CL3}


remove_all:
	@rm -rf *gcc*
	@rm -rf *bin*
	@echo ${CL2}[$@] ${CL}Success.${CL3}

cross-cc: $(PREFIX)/bin/x86_64-elf-gcc