#!/usr/bin/make -f
# -*- makefile -*-
# Copyright © 2010-2019 Stephen Kitt <steve@sk2.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 2.1 of the
# License, or (at your option) any later version.
#
# This program 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.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Uncomment this to turn on verbose mode.
#export DH_VERBOSE=1

# Disable package mangling in Launchpad; it currently fails to parse
# Built-Using, which results in build failures
export NO_PKG_MANGLE=1

include /usr/share/dpkg/pkg-info.mk
include /usr/share/dpkg/architecture.mk

top_dir := $(shell pwd)
gdb_dir := /usr/src
upstream_gdb_dir := $(top_dir)/upstream
upstream_gdbserver_dir := $(upstream_gdb_dir)/gdb/gdbserver
build_gdb_dir := $(top_dir)/build-gdb
build_gdbserver_dir := $(top_dir)/build-gdbserver
source_version := $(shell dpkg-query -W -f="\$${Version}\n" gdb-source)
deb_version := $(source_version)+$(DEB_VERSION)
deb_upstream_version := $(shell echo $(deb_version) | cut -d- -f1)
gnu_upstream_version := $(shell echo $(deb_upstream_version) | cut -d. -f1-3)
package := gdb-mingw-w64

targets := i686-w64-mingw32 x86_64-w64-mingw32

# Full hardening for Debian-targeted builds
dpkg_buildflags_arch = DEB_BUILD_MAINT_OPTIONS="hardening=+all" dpkg-buildflags

# Windows targets don't support stackprotector, relro, bindnow or pie
# We disable PE timestamps to build reproducibly
# We disable format because the gdb build tries to do so (partially)
# anyway, and breaks the build with -Werror=format-security as a result
# We link libstdc++ and libgcc statically to avoid needing the DLLs
dpkg_buildflags_indep = DEB_BUILD_MAINT_OPTIONS="hardening=-stackprotector,-relro,-bindnow,-pie,-format" DEB_LDFLAGS_MAINT_APPEND="-Xlinker --no-insert-timestamp -static-libstdc++ -static-libgcc" dpkg-buildflags

spelling = grep -rl "$(1)" $(upstream_gdb_dir) | xargs -r sed -i "s/$(1)/$(2)/g"

%:
	dh $@

unpack-stamp:
	tar xf $(gdb_dir)/gdb.tar.*
	rm -rf $(upstream_gdb_dir)
	mv gdb $(upstream_gdb_dir)
	$(call spelling,occurences,occurrences)
	$(call spelling,Unkown,Unknown)
	$(call spelling,vaild,valid)
	touch $@

override_dh_auto_clean:
	dh_auto_clean
	rm -rf *-stamp $(build_gdb_dir) $(build_gdbserver_dir) $(upstream_gdb_dir)

override_dh_auto_configure-arch: unpack-stamp
	set -e; \
	for target in $(targets); do \
		mkdir -p $(build_gdb_dir)/$$target; \
		cd $(build_gdb_dir)/$$target; \
		$(upstream_gdb_dir)/configure \
			--build=$(DEB_BUILD_GNU_TYPE) \
			--prefix=/usr --enable-lto \
			--with-system-readline --with-system-zlib \
			--enable-tui --with-expat --with-python=python3 \
			--target=$$target --disable-werror \
			$(shell $(dpkg_buildflags_arch) --export=cmdline); \
	done

override_dh_auto_configure-indep: unpack-stamp
	set -e; \
	for target in $(targets); do \
		mkdir -p $(build_gdbserver_dir)/$$target; \
		cd $(build_gdbserver_dir)/$$target; \
		$(upstream_gdbserver_dir)/configure \
			--build=$(DEB_BUILD_GNU_TYPE) \
			--host=$$target --target=$$target \
			--disable-werror \
			$(shell $(dpkg_buildflags_indep) --export=cmdline); \
	done

override_dh_auto_build-arch:
	set -e; \
	for target in $(targets); do \
		$(shell $(dpkg_buildflags_arch) --export=sh); \
		dh_auto_build --parallel -B$(build_gdb_dir)/$$target -- V=1; \
	done

override_dh_auto_build-indep:
	set -e; \
	for target in $(targets); do \
		$(shell $(dpkg_buildflags_indep) --export=sh); \
		dh_auto_build --parallel -B$(build_gdbserver_dir)/$$target -- V=1; \
	done

override_dh_auto_install:
	set -e; \
	for target in $(targets); do \
		dh_auto_install -B$(build_gdb_dir)/$$target; \
	done
# Drop files which will conflict with other packages
	rm -rf debian/$(package)/usr/lib
	rm -rf debian/$(package)/usr/share/gdb
	rm -rf debian/$(package)/usr/share/info
	rm -rf debian/$(package)/usr/share/locale

override_dh_installchangelogs:
	dh_installchangelogs $(upstream_gdb_dir)/ChangeLog

override_dh_gencontrol:
	dh_gencontrol -- -v$(deb_version) -Vlocal:Version=$(deb_upstream_version) -Vgdb:Version=$(source_version)