#!/usr/bin/make -f
export DH_VERBOSE=1

GCC_TARGETS := $(shell dh_listpackages | sed -nr 's/^gcc-xtensa-//p')

GCC_VERSION=13
GCC_PACKAGE=gcc-$(GCC_VERSION)
GCC_DIR := /usr/src/gcc-13
GCC_TARBALL := $(notdir $(wildcard $(GCC_DIR)/gcc-*.tar.*))

top_dir=$(shell pwd)
stampdir=debian/stamp

source_version := $(shell dpkg-query -W -f="\$${Version}\n" $(GCC_PACKAGE)-source)
deb_version := $(source_version)+$(shell dpkg-parsechangelog | sed -ne "s/^Version: \(.*\)/\1/p")
deb_upstream_version := $(shell echo $(deb_version) | cut -d- -f1)
base_version := $(shell echo $(deb_version) | sed -e 's/\([1-9]\.[0-9]\).*-.*/\1/')
BUILT_USING := $(shell dpkg-query -f '$${source:Package} (= $${source:Version}), ' -W $(GCC_PACKAGE)-source)

export DEB_BUILD_MAINT_OPTIONS=hardening=+all,-format
buildflags:=$(shell dpkg-buildflags --export=configure) INHIBIT_LIBC_CFLAGS="-DUSE_TM_CLONE_REGISTRY=0"

target_tools=\
	AR_FOR_TARGET=$(target)-ar \
	AS_FOR_TARGET=$(target)-as \
	LD_FOR_TARGET=$(target)-ld \
	NM_FOR_TARGET=$(target)-nm \
	OBJDUMP_FOR_TARGET=$(target)-objdump \
	RANLIB_FOR_TARGET=$(target)-ranlib \
	READELF_FOR_TARGET=$(target)-readelf \
	STRIP_FOR_TARGET=$(target)-strip

define configure_flags
	--enable-languages=c,c++,d,lto \
	--prefix=/usr/lib \
	--infodir=/usr/share/doc/gcc-xtensa-$(1)/info \
	--mandir=/usr/share/man \
	--htmldir=/usr/share/doc/gcc-xtensa-$(1)/html \
	--pdfdir=/usr/share/doc/gcc-xtensa-$(1)/pdf \
	--bindir=/usr/bin \
	--libexecdir=/usr/lib \
	--libdir=/usr/lib \
	--with-system-zlib \
	--enable-multilib \
	--disable-decimal-float \
	--disable-libffi \
	--disable-libgomp \
	--disable-libmudflap \
	--disable-libphobos \
	--disable-libquadmath \
	--disable-libquadmath-support \
	--disable-libssp \
	--disable-libstdcxx-pch \
	--disable-libstdc++-v3 \
	--disable-nls \
	--disable-shared \
	--disable-threads \
	--disable-tls \
	--enable-lto \
	--enable-target-optspace \
	--disable-__cxa_atexit \
	--without-long-double-128 \
	--disable-multilib \
	--enable-cxx-flags=-fno-exceptions \
	--build=$(DEB_BUILD_GNU_TYPE) \
	--host=$(DEB_HOST_GNU_TYPE) \
	--target=xtensa-$(1)-elf \
	--with-gnu-as \
	--with-gnu-ld \
	--with-headers=no \
	--without-newlib \
	"--with-pkgversion=$(deb_version)" \
	--without-included-gettext \
	SED=/bin/sed \
	SHELL=/bin/sh \
	BASH=/bin/bash \
	CONFIG_SHELL=/bin/bash \
	$(buildflags) \
	$(target_tools)
endef

%:
	dh $@

source/src:
	install -d source
	tar -C source -xf $(GCC_DIR)/$(GCC_TARBALL)
	mv source/gcc-$(GCC_VERSION)* source/src
	cp /usr/share/doc/$(GCC_PACKAGE)-source/copyright debian/copyright-gcc
	cp -a $(GCC_DIR)/debian/patches source/
	mkdir -p $(stampdir)
	set -ex; \
		cd source; \
		GFDL_INVARIANT_FREE=yes \
		patchdir=$(top_dir)/source/patches \
		stampdir=$(top_dir)/$(stampdir) \
		make -f $(GCC_DIR)/debian/rules.patch series; \
		QUILT_PATCHES=$(top_dir)/source/patches QUILT_PATCH_OPTS='-E' \
		quilt --quiltrc /dev/null push -a; \
	touch src/gcc/distro-defaults.h; \
	set -ex; \
		cd src; \
		for patch in ../../debian/local-patches/[0-9]*.patch; do \
			echo Applying patch "$$patch"; \
			patch -p1 < "$$patch"; \
		done

source/gcc-%: source/src
	cp -al $< $@
	cp debian/overlay/$*/include/xtensa-config.h $@/include/

configure-%: source/gcc-%
	install -d build/gcc-$*
	cd build/gcc-$* && $(CURDIR)/$</configure $(call configure_flags,$*)

auto_build-%:
	dh_auto_build -pgcc-xtensa-$* -Dsource/gcc-$* -Bbuild/gcc-$*

auto_install-%:
	(cd build/gcc-lx106/xtensa-lx106-elf/libgcc/ && xtensa-lx106-elf-ar -M <$(top_dir)/debian/strip-libgcc-funcs.txt)
	#dh_auto_install -pgcc-xtensa-$* -Dsource/gcc-$* -Bbuild/gcc-$* --destdir debian/gcc-xtensa-$*
	dh_auto_install -pgcc-xtensa-$* -Dsource/gcc-$* -Bbuild/gcc-$* --destdir debian/gcc-xtensa-$*
	rm -r debian/gcc-xtensa-$*/usr/share/man/
	rm debian/gcc-xtensa-$*/usr/lib/libcc*

override_dh_auto_build: $(addprefix auto_build-,$(GCC_TARGETS))
	dh_auto_build --remaining-packages

override_dh_auto_configure: $(addprefix configure-,$(GCC_TARGETS))

override_dh_auto_clean:
	rm -rf build source debian/copyright-gcc $(stampdir)
	dh_autoreconf_clean

override_dh_auto_test:
	@echo "no testing, that's way too painful"
#	dh_auto_test -Dsrc -B$(build_dir) --max-parallel=1

override_dh_gencontrol:
	dh_gencontrol -a -- -v$(deb_version) -Vlocal:Version=$(deb_upstream_version) -Vgcc:Version=$(source_version) -VBuilt-Using="$(BUILT_USING)"

override_dh_auto_install: $(addprefix auto_install-,$(GCC_TARGETS))

override_dh_installchangelogs:
	dh_installchangelogs source/src/ChangeLog

override_dh_compress:
	dh_compress -Xexamples/

override_dh_strip:
	dh_strip -X.a