#!/usr/bin/make -f

export DEB_BUILD_MAINT_OPTIONS = hardening=+all # optimize=+lto
export DEB_LDFLAGS_MAINT_APPEND = -Wl,--as-needed
export DEB_CXXFLAGS_MAINT_APPEND += -O2
export DEB_CXXFLAGS_MAINT_STRIP += -O3

# Get compilation flags from dpkg-buildflags
DPKG_EXPORT_BUILDFLAGS = 1
include /usr/share/dpkg/default.mk

# The buildtools.mk script was introduced along with dpkg-dev 1.19.0.
# Fixes FTCBFS. See https://bugs.debian.org/842600
DPKG_EXPORT_BUILDTOOLS=1
-include /usr/share/dpkg/buildtools.mk

ifneq (,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
	NUMJOBS = $(patsubst parallel=%,%,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
	MAKEFLAGS += -j$(NUMJOBS)
endif

%:
	dh $@

SO=3
VERS=$(SO).1

SRC=$(sort $(wildcard double-conversion/*.cc))
OBJ=$(SRC:.cc=.o)

TEST_SRC=$(sort $(wildcard test/cctest/*.cc))
TEST_OBJ=$(TEST_SRC:.cc=.o)

CPPFLAGS += -Idouble-conversion/ -I.

debian/shared_dir debian/static_dir:
	mkdir -p $(subst _dir,,$(@))
	touch $@

$(subst double-conversion/,debian/static/,$(OBJ)): \
  debian/static/%.o : double-conversion/%.cc debian/static_dir

	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -c $< -o $@

$(subst double-conversion/,debian/shared/,$(OBJ)): \
  debian/shared/%.o : double-conversion/%.cc debian/shared_dir

	$(CXX) $(CPPFLAGS) $(CXXFLAGS) -fPIC -c $< -o $@

libdouble-conversion.so: libdouble-conversion.so.$(SO)
	ln -snf $< $@

libdouble-conversion.so.$(SO): libdouble-conversion.so.$(VERS)
	ln -snf $< $@

libdouble-conversion.so.$(VERS): $(subst double-conversion/,debian/shared/,$(OBJ))
	$(CXX) $(LDFLAGS) -shared -Wl,-soname=libdouble-conversion.so.$(SO) -o $@ $^

libdouble-conversion.a: $(subst double-conversion/,debian/static/,$(OBJ))
	ar r $@ $^

run_tests: $(TEST_OBJ) libdouble-conversion.a
	$(CXX) $(LDFLAGS) -o run_tests $^

override_dh_auto_build: libdouble-conversion.so libdouble-conversion.a run_tests
	sed -e 's/@DEB_HOST_MULTIARCH@/$(DEB_HOST_MULTIARCH)/g' \
		< debian/double-conversion.pc.in > debian/double-conversion.pc

override_dh_auto_clean:
	rm -f libdouble-conversion.* run_tests test/cctest/*.o
	rm -rf debian/shared debian/static
	rm -f debian/static_dir debian/shared_dir
	-$(RM) debian/*.pc

override_dh_missing:
	dh_missing --fail-missing