# https://github.com/apritzel/cross

TOP		= $(shell readlink -f .)
MKINCS		= $(TOP)/mkincs

include $(MKINCS)/versions.mk

TARGET_TRIPLET	= aarch64-linux-gnu

NUMJOBS		= $(shell getconf _NPROCESSORS_ONLN 2> /dev/null)

SOURCEPATH	= $(TOP)/Sources
BUILDPATH	= $(TOP)/0_BUILD
INSTALLPATH	= $(TOP)/1_INST/crossarm-$(SUITE)
SYSROOT		= $(INSTALLPATH)/sysroot
PATCHESPATH	= $(TOP)/Patches

all: dirstruct download build

build: \
	binutils \
	gcc-stage1 \
	cross-glibc \
	gcc-stage2  \
	pack

dirstruct:
	mkdir -p $(BUILDPATH)
	mkdir -p $(INSTALLPATH)
	mkdir -p $(SOURCEPATH)
	#sudo apt-get install texinfo

download: \
	$(SOURCEPATH)/glibc-$(VERSION_GLIBC).tar.bz2 \
	$(SOURCEPATH)/gcc-$(VERSION_GCC).tar.bz2 \
	$(SYSROOT) \
	$(SOURCEPATH)/gdb-$(VERSION_GDB).tar.gz \
	$(SOURCEPATH)/binutils-$(VERSION_BINUTILS).tar.bz2 \
	$(SOURCEPATH)/zlib-$(VERSION_ZLIB).tar.gz \
	$(SOURCEPATH)/isl-$(VERSION_ISL).tar.bz2

$(SOURCEPATH)/glibc-$(VERSION_GLIBC).tar.bz2:
	curl https://ftp.gnu.org/gnu/glibc/glibc-$(VERSION_GLIBC).tar.bz2\
		--output $(SOURCEPATH)/glibc-$(VERSION_GLIBC).tar.bz2
$(SOURCEPATH)/gcc-$(VERSION_GCC).tar.bz2:
	rm -Rf $(BUILDPATH)/gcc-$(VERSION_GCC)
	git clone -b releases/gcc-$(VERSION_GCC) --depth 1 \
		https://gcc.gnu.org/git/gcc.git $(BUILDPATH)/gcc-$(VERSION_GCC)
	cd $(BUILDPATH) && \
		tar -jcf $(SOURCEPATH)/gcc-$(VERSION_GCC).tar.bz2 \
		./gcc-$(VERSION_GCC)
$(SYSROOT):
	tar -zxf $(SOURCEPATH)/sysroot-aarch64.tgz -C $(INSTALLPATH)
$(SOURCEPATH)/binutils-$(VERSION_BINUTILS).tar.bz2:
	curl https://ftp.gnu.org/gnu/binutils/binutils-$(VERSION_BINUTILS).tar.bz2 \
		--output $(SOURCEPATH)/binutils-$(VERSION_BINUTILS).tar.bz2
$(SOURCEPATH)/gdb-$(VERSION_GDB).tar.gz:
	curl https://ftp.gnu.org/gnu/gdb/gdb-$(VERSION_GDB).tar.gz \
		--output $(SOURCEPATH)/gdb-$(VERSION_GDB).tar.gz
$(SOURCEPATH)/gmp-$(VERSION_GMP).tar.bz2:
	curl https://ftp.gnu.org/gnu/gmp/gmp-$(VERSION_GMP).tar.bz2 \
		--output $(SOURCEPATH)/gmp-$(VERSION_GMP).tar.bz2
$(SOURCEPATH)/mpc-$(VERSION_MPC).tar.gz:
	curl https://ftp.gnu.org/gnu/mpc/mpc-$(VERSION_MPC).tar.gz \
		--output $(SOURCEPATH)/mpc-$(VERSION_MPC).tar.gz
$(SOURCEPATH)/mpfr-$(VERSION_MPFR).tar.bz2:
	curl https://ftp.gnu.org/gnu/mpfr/mpfr-$(VERSION_MPFR).tar.bz2 \
		--output $(SOURCEPATH)/mpfr-$(VERSION_MPFR).tar.bz2
$(SOURCEPATH)/zlib-$(VERSION_ZLIB).tar.gz:
	curl https://www.zlib.net/zlib-$(VERSION_ZLIB).tar.gz \
		--output $(SOURCEPATH)/zlib-$(VERSION_ZLIB).tar.gz
$(SOURCEPATH)/isl-$(VERSION_ISL).tar.bz2:
	curl ftp://gcc.gnu.org/pub/gcc/infrastructure/isl-$(VERSION_ISL).tar.bz2 \
		--output $(SOURCEPATH)/isl-$(VERSION_ISL).tar.bz2

prepare:
	cd $(BUILDPATH)/gcc.src && \
		patch -p1 < $(PATCHESPATH)/0002-Relocate-libintl.patch && \
		patch -p1 < $(PATCHESPATH)/0010-Fix-using-large-PCH.patch && \
		patch -p1 < $(PATCHESPATH)/0025-gcc11_1_0_quick_exit.patch
	tar -jxf $(SOURCEPATH)/gdb-$(VERSION_GDB).tar.bz2 -C $(BUILDPATH)/
	tar -jxf $(SOURCEPATH)/binutils-$(VERSION_BINUTILS).tar.bz2 -C $(BUILDPATH)/

binutils:
	tar -jxf $(SOURCEPATH)/binutils-$(VERSION_BINUTILS).tar.bz2 -C $(BUILDPATH)/
	mkdir -p $(BUILDPATH)/_binutils
	cd  $(BUILDPATH)/_binutils && \
		../binutils-$(VERSION_BINUTILS)/configure \
			--with-pkgversion=$(PKGVERSION) \
			--prefix=$(INSTALLPATH) \
			--with-gnu-ld --with-gnu-as \
			--target=$(TARGET_TRIPLET) \
			--build=x86_64-linux-gnu \
			--host=x86_64-linux-gnu \
			--with-sysroot=$(SYSROOT) \
			--disable-bootstrap \
			--disable-shared \
			--disable-nls \
			--enable-multilib \
			--enable-threads \
			--enable-plugins \
			--enable-gold=yes \
			--enable-ld=default
	cd  $(BUILDPATH)/_binutils && \
		make -j $(NUMJOBS) && make install

gcc-stage1:
	cd $(BUILDPATH) && rm -Rf gcc-$(VERSION_GCC) && \
		tar -jxf $(SOURCEPATH)/gcc-$(VERSION_GCC).tar.bz2
	cd $(BUILDPATH)/gcc-$(VERSION_GCC) && bash ./contrib/download_prerequisites
	rm -Rf $(BUILDPATH)/gcc.build && mkdir -p $(BUILDPATH)/gcc.build
	cd $(BUILDPATH)/gcc.build && \
		$(BUILDPATH)/gcc-$(VERSION_GCC)/configure \
			--with-pkgversion=$(PKGVERSION) \
			--prefix=$(INSTALLPATH) \
			--with-gnu-ld --with-gnu-as \
			--target=$(TARGET_TRIPLET) \
			--with-sysroot=$(SYSROOT) \
			--build=x86_64-linux-gnu \
			--host=x86_64-linux-gnu \
			--disable-bootstrap \
			--disable-shared \
			--disable-nls \
			--enable-multilib \
			--disable-threads \
			--with-newlib \
			--without-headers \
			--enable-languages=c \
			--with-system-zlib \
			--disable-libgomp \
			--disable-libitm \
			--disable-libquadmath \
			--disable-libsanitizer \
			--disable-libssp \
			--disable-libvtv \
			--disable-libcilkrts \
			--disable-libatomic
	cd $(BUILDPATH)/gcc.build && \
	make -j $(NUMJOBS) all-gcc all-target-libgcc && \
	make install-gcc install-target-libgcc

cross-glibc:
	cd $(BUILDPATH) && rm -Rf libc-$(VERSION_GLIBC) && \
		tar -jxf $(SOURCEPATH)/glibc-$(VERSION_GLIBC).tar.bz2
	cd $(BUILDPATH)/glibc-$(VERSION_GLIBC) && \
		patch -p1 < $(PATCHESPATH)/001-glibc_multiple_defs_of__nss__database.patch && \
		patch -p0 < $(PATCHESPATH)/001-glibc-find_cxx_header.patch
	rm -Rf $(BUILDPATH)/glibc && mkdir -p $(BUILDPATH)/glibc
	export PATH=$(INSTALLPATH)/bin:$(PATH) && \
	cd $(BUILDPATH)/glibc && \
		CFLAGS="-O2 -DBOOTSTRAP_GCC" \
		$(BUILDPATH)/glibc-$(VERSION_GLIBC)/configure \
			libc_cv_forced_unwind=yes \
			libc_cv_c_cleanup=yes \
			libc_cv_gnu89_inline=yes \
			--prefix=$(INSTALLPATH) \
			--with-gnu-ld \
			--with-gnu-as \
			--build=x86_64-linux-gnu  \
			--host=$(TARGET_TRIPLET) \
			--target=$(TARGET_TRIPLET) \
			--without-cvs \
			--disable-nls \
			--disable-sanity-checks \
			--enable-obsolete-rpc \
			--disable-profile \
			--disable-debug \
			--disable-werror \
			--without-selinux \
			--with-tls \
			--enable-kernel=3.7.0 \
			--with-headers=$(SYSROOT)/usr/include \
			--enable-hacker-mode && \
		make -j $(NUMJOBS) && make install


gcc-stage2:
	cd $(BUILDPATH) && rm -Rf gcc-$(VERSION_GCC) && \
		tar -jxf $(SOURCEPATH)/gcc-$(VERSION_GCC).tar.bz2
	cd $(BUILDPATH)/gcc-$(VERSION_GCC) && bash ./contrib/download_prerequisites
	rm -Rf $(BUILDPATH)/gcc.build && mkdir -p $(BUILDPATH)/gcc.build
	cd $(BUILDPATH)/gcc.build && \
		$(BUILDPATH)/gcc-$(VERSION_GCC)/configure \
			--with-pkgversion=$(PKGVERSION) \
			--prefix=$(INSTALLPATH) \
			--with-gnu-ld --with-gnu-as \
			--target=$(TARGET_TRIPLET) \
			--with-sysroot=$(SYSROOT) \
			--build=x86_64-linux-gnu \
			--host=x86_64-linux-gnu \
			--disable-bootstrap \
			--enable-static \
			--enable-shared \
			--disable-nls \
			--disable-libquadmath \
			--disable-libmudflap --enable-threads \
			--enable-tls \
			--disable-multilib \
			--enable-languages=c,c++ \
			--disable-libssp \
			--disable-libmudflap --enable-threads \
			--without-cloog --disable-decimal-float --with-abi=lp64 --with-cpu=cortex-a53 \
			--disable-libgomp \
			--with-system-zlib
	cd $(BUILDPATH)/gcc.build && \
	make -j $(NUMJOBS)  &&  make install

pack:
	cd $(TOP)/1_INST && tar -jcf $(TOP)/crossarm-$(SUITE).tar.bz2 ./crossarm-$(SUITE)