# build/version.h

build/version.h:$(SOURCE_DIR)/VERSION $(SOURCE_DIR)/.git/index

		mkdir -p build

		printf '#define VERSION "%s"\n' \

		       "$$(cd $(SOURCE_DIR); $(SHELL) ./tools/version.sh)" > $@

# alltypes.h, syscall.h

build/include/bits/:

		mkdir -p $@

ALLTYPES_H      = build/include/bits/alltypes.h

SYSCALL_H       = build/include/bits/syscall.h

ARCH_GEN_H      = $(ALLTYPES_H) $(SYSCALL_H)

ALLTYPES_DEPS   = \

		$(PORT_DIR)/arch/$(ARCH)/bits/alltypes.h.in \

		$(SOURCE_DIR)/include/alltypes.h.in \

		$(SOURCE_DIR)/tools/mkalltypes.sed

$(ALLTYPES_H):	$(ALLTYPES_DEPS) build/include/bits/

		sed -f $(SOURCE_DIR)/tools/mkalltypes.sed \

			$(PORT_DIR)/arch/$(ARCH)/bits/alltypes.h.in \

			$(SOURCE_DIR)/include/alltypes.h.in > $@

build/syscall_h.tag:

		touch $@

		touch $(SYSCALL_H)

build/syscall-copy.tag: $(PORT_DIR)/arch/$(ARCH)/bits/syscall.h

		mkdir -p build/include/bits/

		cp $< $(SYSCALL_H)

		touch $@

build/syscall-gen.tag: $(PORT_DIR)/arch/$(ARCH)/bits/syscall.h.in

		mkdir -p build/include/bits/

		cp $< $(SYSCALL_H).tmp

		sed -n -e 's/__NR_/SYS_/p' < $< >> $(SYSCALL_H).tmp

		mv $(SYSCALL_H).tmp $(SYSCALL_H)

		touch $@

$(SYSCALL_H):	build/syscall_h.tag

# arch headers

libc_bits_h     = $(sort $(wildcard $(SOURCE_DIR)/arch/generic/bits/*.h))

port_bits_h     = $(sort $(wildcard $(PORT_DIR)/arch/$(ARCH)/bits/*.h))

port_substs_h   = $(subst $(PORT_DIR)/arch/$(ARCH)/, \

		          $(SOURCE_DIR)/arch/generic/,\

		   $(port_bits_h))

ARCH_HEADERS    = $(port_bits_h) $(filter-out $(port_substs_h), $(libc_bits_h))

src_bits_h      = $(ARCH_GEN_H)

src_bits_h     += $(subst $(SOURCE_DIR)/arch/generic/,build/include/,\

		    $(subst $(PORT_DIR)/arch/$(ARCH)/,build/include/, \

		      $(ARCH_HEADERS)))

dst_bits_h      = $(src_bits_h:build/include/%=$(DESTDIR)$(INCLUDEDIR)/%)

# libc headers

src_header_dirs = $(filter %/,$(wildcard $(SOURCE_DIR)/include/*/))

dst_header_dirs = $(src_header_dirs:$(SOURCE_DIR)/include/%=$(DESTDIR)$(INCLUDEDIR)/%)

src_c_headers   = $(sort $(wildcard $(SOURCE_DIR)/include/*.h))

src_c_headers  += $(sort $(wildcard $(SOURCE_DIR)/include/*/*.h))

dst_c_headers   = $(subst $(SOURCE_DIR)/include/,  \

		          $(DESTDIR)$(INCLUDEDIR)/, \

		    $(src_c_headers))

$(dst_header_dirs):

			mkdir -p $@

build/include/bits/%.h:	build/headers.tag

$(DESTDIR)$(INCLUDEDIR)/bits/:

			mkdir -p $@

$(DESTDIR)$(INCLUDEDIR)/bits/%.h: build/include/bits/%.h $(DESTDIR)$(INCLUDEDIR)/bits/

			cp $< $@.tmp

			chmod 0644 $@.tmp

			mv $@.tmp $@

$(DESTDIR)$(INCLUDEDIR)/%.h: | $(dst_header_dirs)

$(DESTDIR)$(INCLUDEDIR)/%.h: $(SOURCE_DIR)/include/%.h

			cp -p $< $@.tmp

			chmod 0644 $@.tmp

			mv $@.tmp $@

install-arch-headers:	headers.tag $(src_bits_h) $(dst_bits_h)

install-libc-headers:	headers.tag $(dst_header_dirs) $(dst_c_headers)

install-headers:	install-arch-headers install-libc-headers

# build/include

build/headers.tag:	| build/include/bits/

build/headers.tag:	$(ARCH_HEADERS)

			cp $(ARCH_HEADERS) build/include/bits/

			touch $@

headers.tag:		build/headers.tag $(ARCH_GEN_H)

			touch $@

clean-headers:

		rm -f $(src_bits_h)

		rm -f $(SYSCALL_H).tmp

		rm -f build/version.h

		rmdir build/include/bits 2>/dev/null || true

		rmdir build/include      2>/dev/null || true

		rm -f build/headers.tag

		rm -f build/syscall-copy.tag

		rm -f build/syscall-gen.tag

		rm -f build/syscall_h.tag

		rm -f headers.tag

clean:		clean-headers

.PHONY:		syscall-arch

.PHONY:		syscall-copy

.PHONY:		syscall-gen

.PHONY:		clean-headers