#!/usr/bin/make -f

export DH_OPTIONS

CFLAGS = -Wall -g

ifneq (,$(findstring noopt,$(DEB_BUILD_OPTIONS)))
	CFLAGS += -O0
else
	CFLAGS += -O2
endif
ifeq (,$(findstring nostrip,$(DEB_BUILD_OPTIONS)))
	INSTALL_PROGRAM += -s
endif

DEB_HOST_ARCH := $(shell dpkg-architecture -qDEB_HOST_ARCH)

STAMPDIR := debian/stamp

select_target_any = $(shell dh_listpackages -s | grep -v '^$$' | while read p ; do cut -d ' ' -f 1,3 debian/libdir.map | grep -w $$p ; done | grep -v _ | cut -d ' ' -f 1 | sort -u | grep ^$(1)- | cut -d - -f 2-)
select_target_arch = $(filter $(foreach t,$(BUILD_$(1)_TARGETS_any),$(t)_%), $(patsubst configs/%, %, $(wildcard configs/*_$(DEB_HOST_ARCH))))
select_target = $(sort $(BUILD_$(1)_TARGETS_any) $(BUILD_$(1)_TARGETS_arch))

BUILD_GL_TARGETS_any := $(call select_target_any,gl)
BUILD_GL_TARGETS_arch := $(call select_target_arch,GL)
BUILD_GL_TARGETS := $(call select_target,GL)

BUILD_GLU_TARGETS_any := $(call select_target_any,glu)
#BUILD_GLU_TARGETS_arch := $(call select_target_arch,GLU)
BUILD_GLU_TARGETS := $(call select_target,GLU)

BUILD_GLW_TARGETS_any := $(call select_target_any,glw)
#BUILD_GLW_TARGETS_arch := $(call select_target_arch,GLW)
BUILD_GLW_TARGETS := $(call select_target,GLW)

BUILD_TARGETS := \
	$(foreach t, $(BUILD_GL_TARGETS), $(STAMPDIR)/target-gl-$(t)) \
	$(foreach t, $(BUILD_GLU_TARGETS), $(STAMPDIR)/target-glu-$(t)) \
	$(foreach t, $(BUILD_GLW_TARGETS), $(STAMPDIR)/target-glw-$(t))

ifneq ($(strip $(shell grep-dctrl -n -s Package -PX libgl1-mesa-directfb debian/control)),)
DFB_MODULE_DIR := $(shell pkg-config --variable=moduledir directfb-internal)
endif

DRI_MODULE_DIR := /usr/lib/dri

build: $(STAMPDIR)/build
$(STAMPDIR)/build: $(BUILD_TARGETS)
	dh_testdir
	mkdir -p $(dir $@) && touch $@

# Parameters:
#     1: library (gl, glu, glw)
#     2: target (debian, debian-i386, ...)
#     3: subdir to build (mesa, glw, glu/sgi)

define build_target_actions
	dh_testdir
	chmod +x debian/shadowtree
	$(RM) -rf build/$(1)-$(2)
	debian/shadowtree build/$(1)-$(2)
	ln -sf $(2) build/$(1)-$(2)/configs/current
	if test $(1) != gl ; then \
		mkdir -p build/$(1)-$(2)/lib/ ; \
		ln -sf ../../gl-$(2)/lib/libGL.so build/$(1)-$(2)/lib/ ; \
	fi
	make -C build/$(1)-$(2)/src SRC_DIRS=$(3)
	if test $(1) != gl ; then \
		rm build/$(1)-$(2)/lib/libGL.so ; \
	fi
	mkdir -p $(dir $@) && touch $@
endef

$(STAMPDIR)/target-gl-%:
	$(call build_target_actions,gl,$*,mesa)

$(STAMPDIR)/target-glu-%: $(STAMPDIR)/target-gl-%
	$(call build_target_actions,glu,$*,glu/sgi)

$(STAMPDIR)/target-glw-%: $(STAMPDIR)/target-gl-%
	$(call build_target_actions,glw,$*,glw)

# Parameters:
#     1: target (gl-debian, gl-debian-i386, ...)
#     2: installation directory (usr/lib, usr/lib/dbg, ...)
#     3: library package name
#     4: development package name

define install_target_lib_actions
	dh_installdirs -p$(3) $(2)
	dh_installdirs -p$(4) $(2)
	dh_install -p$(3) build/$(1)/lib/lib*.so.* $(2)
	dh_install -p$(4) build/$(1)/lib/lib*.so $(2)
	dh_install -p$(4) build/$(1)/lib/lib*.a $(2)
endef

libdir_map = $(word $(2),$(shell grep '^$(1) ' debian/libdir.map))
install_target_libs = $(call install_target_lib_actions,$(1),$(call libdir_map,$(1),2),$(call libdir_map,$(1),3),$(call libdir_map,$(1),4))

# Parameters:
#     1: target (gl-debian, gl-debian-i386, ...)
#     2: source directory (usr/lib, usr/lib/dbg, ...)
#     3: installation directory (usr/lib, usr/lib/dbg, ...)
#     4: package name

define install_target_driver_actions
	dh_installdirs -p$(4) $(3)
	dh_install -p$(4) build/$(1)/$(2) $(3)
endef

driver_map = $(word $(2),$(shell grep '^$(1) ' debian/drivers.map))
install_target_drivers = $(if $(call driver_map,$(1),1),$(call install_target_driver_actions,$(1),$(call driver_map,$(1),2),$(call driver_map,$(1),3),$(call driver_map,$(1),4)))

# Parameters:
#     1: target (gl-debian, gl-debian-i386, ...)

define install_target
	$(call install_target_libs,$(1))
	$(call install_target_drivers,$(1))
endef

install-target-%: $(STAMPDIR)/target-%
	@echo Target $@.
	$(call install_target,$*)
	@echo Target $@: done.

install-pre:
	@echo Target $@.
	dh_testdir
	dh_testroot
	dh_clean -k
	dh_installdirs
	@echo Target $@: done.

install-all: install-pre \
	$(addprefix install-target-gl-,$(BUILD_GL_TARGETS)) \
	$(addprefix install-target-glu-,$(BUILD_GLU_TARGETS)) \
	$(addprefix install-target-glw-,$(BUILD_GLW_TARGETS))
	@echo Target $@.
	@echo Target $@: done.

clean:
	dh_testdir
	dh_testroot
	$(RM) -rf debian/stamp
	$(RM) -rf build
	dh_clean

install: build install-all
	@echo Target $@.
	@echo Target $@: done.

binary-indep: DH_OPTIONS := -i
binary-indep: build
	@echo Target $@
	dh_testdir
	dh_testroot
	dh_installchangelogs docs/VERSIONS
	dh_installdocs
#	dh_installexamples
	dh_install
#	dh_installman
#	dh_link
	dh_strip
	dh_compress
	dh_fixperms
	dh_installdeb
	dh_gencontrol
	dh_md5sums
	dh_builddeb
	@echo Target $@: done.

# binary-arch: DH_OPTIONS := -s
binary-arch: build install
	@echo Target $@
	dh_testdir -s
	dh_testroot -s
	dh_installchangelogs -s docs/VERSIONS
	dh_installdocs -s
#	dh_installexamples -s
	dh_install -s
#	dh_installman -s
#	dh_link -s
	dh_strip -s
	dh_compress -s
	dh_fixperms -s
#	dh_makeshlibs -s -Nlibglu1-mesa -Nmesag3
	dh_makeshlibs -plibgl1-mesa-swx11-dbg -V 'libgl1-mesa-swx11 | libgl1'
ifneq ($(strip $(shell dh_listpackages -s | grep -w libgl1-mesa-glide3)),)
	dh_makeshlibs -plibgl1-mesa-glide3 -V 'libgl1-mesa-glide3'
endif
ifneq ($(strip $(shell dh_listpackages -s | grep -w libglu1-mesa)),)
	dh_makeshlibs -plibglu1-mesa -V 'libglu1-mesa | libglu1'
endif
ifneq ($(strip $(shell dh_listpackages -s | grep -w libosmesa6)),)
	dh_makeshlibs -plibosmesa6
endif
ifneq ($(strip $(shell dh_listpackages -s | grep -w libgl1-mesa-swx11)),)
	dh_makeshlibs -plibgl1-mesa-swx11 -V 'libgl1-mesa-swx11 | libgl1'
endif
ifneq ($(strip $(shell dh_listpackages -s | grep -w libgl1-mesa-glx)),)
	dh_makeshlibs -plibgl1-mesa-glx -V 'libgl1-mesa-glx | libgl1'
endif
ifneq ($(strip $(shell dh_listpackages -s | grep -w libgl1-mesa-directfb)),)
	dh_makeshlibs -plibgl1-mesa-directfb -V 'libgl1-mesa-directfb | libgl1'
endif
# Make sure nothing has been left behind.
	find debian -mindepth 2 -name shlibs | cut -d / -f 2 | sort -u > \
		debian/shlibs.actual
	find debian -mindepth 2 -name lib\*.so.\* | cut -d / -f 2 | sort -u > \
		debian/shlibs.should
	cmp debian/shlibs.actual debian/shlibs.should
	rm debian/shlibs.actual debian/shlibs.should
	dh_installdeb -s
	dh_shlibdeps -s
	dh_gencontrol -s
	dh_md5sums -s
	dh_builddeb -s
	@echo Target $@: done.

binary: binary-indep binary-arch
.PHONY: build clean binary-indep binary-arch binary install configure