#!/usr/bin/make -f

TARGET_BUILD	:= build-llvm
GCC_VERSION     := 4.7
LLVM_VERSION	:= 3.3
SONAME_EXT      := 1
DEBIAN_REVISION := $(shell dpkg-parsechangelog | sed -rne 's,^Version: .*-(.*),\1,p')
ifneq (,$(filter parallel=%,$(subst $(COMMA), ,$(DEB_BUILD_OPTIONS))))
  NJOBS := -j $(subst parallel=,,$(filter parallel=%,$(subst $(COMMA), ,$(DEB_BUILD_OPTIONS))))
endif

DEB_HOST_MULTIARCH  = $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
DEB_HOST_GNU_TYPE   = $(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)
DEB_HOST_ARCH_BITS  = $(shell dpkg-architecture -qDEB_HOST_ARCH_BITS)
DEB_HOST_ARCH       = $(shell dpkg-architecture -qDEB_HOST_ARCH)

OCAML_STDLIB_DIR    ?= $(shell ocamlc -where)

confargs := \
        --with-c-include-dirs=/usr/include/$(DEB_HOST_MULTIARCH):/usr/include/$(DEB_HOST_GNU_TYPE):/usr/include \
	--with-cxx-include-root=/usr/include/c++/$(GCC_VERSION) \
	--with-cxx-include-arch=$(DEB_HOST_GNU_TYPE) \
	--host=$(DEB_HOST_GNU_TYPE) --build=$(DEB_BUILD_GNU_TYPE)

ifeq ($(shell dpkg-architecture -qDEB_HOST_ARCH_BITS),64)
  confargs += --with-cxx-include-32bit-dir=32
else
  confargs += --with-cxx-include-64bit-dir=64
endif

opt_flags = -g -O2
ifneq (,$(findstring $(DEB_HOST_ARCH),armel))
  opt_flags += -marm
endif


%:
	dh $@
# --buildsystem=cmake --builddirectory=$(TARGET_BUILD)
debian/%: debian/%.in
	sed -e 's|@DEB_HOST_MULTIARCH@|$(DEB_HOST_MULTIARCH)|g' -e "s|@OCAML_STDLIB_DIR@|$(OCAML_STDLIB_DIR)|g" -e "s|@LLVM_VERSION@|$(LLVM_VERSION)|g" $< > $@

override_dh_auto_configure: debian/lldb-$(LLVM_VERSION).install debian/lldb-$(LLVM_VERSION).links debian/libllvm$(LLVM_VERSION).install debian/llvm-$(LLVM_VERSION)-dev.links debian/libllvm-$(LLVM_VERSION)-ocaml-dev.install debian/libllvm-$(LLVM_VERSION)-ocaml-dev.dirs debian/llvm-$(LLVM_VERSION)-runtime.binfmt debian/llvm-$(LLVM_VERSION)-runtime.prerm
	mkdir -p $(TARGET_BUILD)
	mkdir -p clang/include/clang/Debian
	sed -e "s|@DEB_HOST_MULTIARCH@|$(DEB_HOST_MULTIARCH)|" \
		-e "s|@DEB_HOST_GNU_TYPE@|$(DEB_HOST_GNU_TYPE)|" \
		-e "s|@DEB_PATCHSETVERSION@|$(DEBIAN_REVISION)|" \
		debian/debian_path.h > clang/include/clang/Debian/debian_path.h

# Remove some old symlinks
	cd tools/ && \
	if test -h clang; then \
		rm clang; \
	fi; \
    ln -s ../clang .; \
	readlink clang; \
	if test -h lldb; then \
		rm lldb; \
	fi; \
    ln -s ../lldb .; \
    if test -h polly; then \
        rm polly; \
    fi; \
    ln -s ../polly .; \


	cd projects/ && \
	if test -h compiler-rt; then \
		rm compiler-rt; \
	fi; \
	ln -s ../compiler-rt .; \
	readlink compiler-rt

# Start the actual configure
	cd $(TARGET_BUILD) && \
	  ../configure $(confargs) \
	--prefix=/usr/lib/llvm-$(LLVM_VERSION) \
	--bindir=\$${prefix}/bin/ \
	--disable-assertions \
	--enable-shared \
	--enable-optimized \
	--with-optimize-option=' $(opt_flags)' \
	--enable-pic \
	--enable-libffi \
	--with-ocaml-libdir=/usr/lib/ocaml/llvm-$(LLVM_VERSION) \
	--libdir=\$${prefix}/lib/$(DEB_HOST_MULTIARCH) \
	--with-binutils-include=/usr/include \
	--with-cloog --with-isl \
	--with-bug-report-url=http://bugs.debian.org/ \
	--enable-shared \
	CLANG_VENDOR=Debian || { cat config.log tools/polly/config.log; exit 1; }
#	cd $(TARGET_BUILD) && cmake ../ -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_VERBOSE_MAKEFILE=ON
#	mkdir build-compiler-rt && cd build-compiler-rt && cmake ../compiler-rt
#        --enable-experimental-targets=R600 

override_dh_auto_build:
	$(MAKE) $(NJOBS) -C $(TARGET_BUILD) VERBOSE=1 CLANG_VENDOR=Debian CXXFLAGS=-std=c++0x  REQUIRES_RTTI=1
	cd $(CURDIR)/docs && make -f Makefile.sphinx && make -f Makefile.sphinx man
#	$(MAKE) $(NJOBS) -C build-compiler-rt VERBOSE=1
# Only available in clang 3.3
#	cd $(CURDIR)/tools/clang/docs && make -f Makefile.sphinx
# && make -f Makefile.sphinx man

override_dh_auto_install:
	chrpath -d `find $(CURDIR)/debian/tmp/usr/lib/llvm-$(LLVM_VERSION)/bin/ -type f -executable`
	chrpath -d $(TARGET_BUILD)/Release/bin/clang
	$(MAKE) -C $(TARGET_BUILD)  VERBOSE=1  install DESTDIR=$(CURDIR)/debian/tmp/
	chrpath -d `find $(CURDIR)/debian/tmp/usr/lib/llvm-$(LLVM_VERSION)/bin/ -type f -executable`
	mv $(CURDIR)/debian/tmp/usr/lib/llvm-$(LLVM_VERSION)/lib/libLLVM-$(LLVM_VERSION)*.so $(CURDIR)/debian/tmp/usr/lib/llvm-$(LLVM_VERSION)/lib/libLLVM-$(LLVM_VERSION).so.$(SONAME_EXT)
	mv $(CURDIR)/debian/tmp/usr/lib/llvm-$(LLVM_VERSION)/lib/liblldb.so $(CURDIR)/debian/tmp/usr/lib/llvm-$(LLVM_VERSION)/lib/liblldb.so.$(SONAME_EXT)

	cd debian/tmp/usr/lib/llvm-$(LLVM_VERSION)/lib/ && mv libclang.so libclang.so.$(SONAME_EXT) && ln -s libclang.so.$(SONAME_EXT) libclang.so
#	cd $(TARGET_BUILD)/tools/clang/runtime/compiler-rt/ && rm -rf $$(find . -iname "SubDir.lib*" -o -iname .dir) && rm -rf $$(find -empty)
	mkdir -p $(CURDIR)/debian/compiler-rt/usr/bin/
	cp compiler-rt/lib/asan/scripts/asan_symbolize.py $(CURDIR)/debian/compiler-rt/usr/bin/asan_symbolize
# Create this fake directory to make the install libclang-common-dev happy
# under the unsupported archs of compiler-rt
	mkdir -p $(CURDIR)/debian/tmp/usr/lib/clang/$(LLVM_VERSION)/lib

# Rename binaries
	mkdir -p $(CURDIR)/debian/tmp/usr/bin/
	cd $(CURDIR)/debian/tmp/usr/bin/; rm -f *; \
	for f in ../lib/llvm-$(LLVM_VERSION)/bin/*; do \
		ln -s $$f `basename $$f`-$(LLVM_VERSION); \
		echo "Link $$f to `basename $$f`-$(LLVM_VERSION)"; \
	done

# Rename manpages
	d=$(CURDIR)/docs/_build/man/; \
	cd $$d; \
	for f in *.1; do \
		echo "$$f"|grep "3\.2" || mv $$f `echo $$f|sed "s|\.1|-$(LLVM_VERSION).1|"`; \
	done

# Remove some license files
	rm $(CURDIR)/debian/tmp/usr/lib/llvm-$(LLVM_VERSION)/include/llvm/Support/LICENSE.TXT

.PHONY: override_dh_strip
override_dh_strip:
	dh_strip -p libclang$(SONAME_EXT) --dbg-package=libclang$(SONAME_EXT)-dbg
	dh_strip -p libllvm$(LLVM_VERSION) --dbg-package=libllvm$(LLVM_VERSION)-dbg
	dh_strip -a

override_dh_shlibdeps:
	LD_LIBRARY_PATH=$$LD_LIBRARY_PATH:$(CURDIR)/debian/tmp/usr/lib/llvm-$(LLVM_VERSION)/lib/ dh_shlibdeps

override_dh_auto_test:
	$(MAKE) -C $(TARGET_BUILD) check || true

override_dh_auto_clean:
	dh_auto_clean
	rm -rf $(TARGET_BUILD) tools/clang/include/clang/Debian/debian_path.h docs/_build/
	rm -f `ls debian/*.in|sed -e "s|.in$$||g"`
	find utils -name '*.pyc' | xargs -r rm -f
	find test -name '*.pyc' -o -name '*.o' -o -name '*.cm[ix]' | xargs -r rm -f
	rm -f tools/clang tools/polly tools/lldb projects/compiler-rt