# -*- makefile -*-
# vim: set filetype=make :
# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
#
# Embedded Controller firmware build system - common targets
#

FLATSIZE_FILE ?= .sizes.txt
BUILD_DIR := $(firstword $(subst /, ,$(out)))

build-utils := $(foreach u,$(build-util-bin),$(out)/util/$(u))
host-utils := $(foreach u,$(host-util-bin),$(out)/util/$(u))
build-srcs := $(foreach u,$(build-util-bin),$(sort $($(u)-objs:%.o=util/%.c) util/$(u).c))
host-srcs := $(foreach u,$(host-util-bin),$(sort $($(u)-objs:%.o=util/%.c) util/$(u).c))

# Don't do a build test on the following boards:
skip_boards = OWNERS host it83xx_evb
boards := $(filter-out $(skip_boards),$(notdir $(wildcard board/*)))

# Create output directories if necessary
_common_dir_create := $(foreach d,$(common_dirs),$(shell [ -d $(out)/$(d) ] || \
	    mkdir -p $(out)/$(d)))
_sharedlib_dir_create := $(foreach d,$(dirs),$(shell \
	[ -d $(out)/$(SHOBJLIB)/$(d) ] || mkdir -p $(out)/$(SHOBJLIB)/$(d)))
_dir_create := $(foreach d,$(dirs),$(shell [ -d $(out)/$(BLD)/$(d) ] || \
	    mkdir -p $(out)/RO/$(d); mkdir -p $(out)/RW/$(d)))
_dir_y_create := $(foreach d,$(dirs-y),$(shell [ -d $(out)/$(BLD)/$(d) ] || \
	    mkdir -p $(out)/RO/$(d); mkdir -p $(out)/RW/$(d)))

# V unset for normal output, V=1 for verbose output, V=0 for silent build
# (warnings/errors only). Use echo thus: $(call echo,"stuff  to  echo")
ifeq ($(V),0)
Q := @
echo = echo -n;
quiet = echo -n; $(cmd_$(1))
silent = 1>/dev/null
silent_err = 2>/dev/null
else
echo = echo $(1);
ifeq ($(V),)
Q := @
quiet = @echo '  $(2)' $(subst $(out)/,,$@) ; $(cmd_$(1))
silent = 1>/dev/null
silent_err = 2>/dev/null
else
Q :=
quiet = $(cmd_$(1))
endif
endif

# commands to build all targets
cmd_lds = $(CPP) -P -C -MMD -MF $@.d -MT $@ $(CPPFLAGS) $< -o $@
cmd_lds_b = $(cmd_lds) -DRW_B_LDS
# Allow obj_to_bin to be overridden by board or chip specific commands
cmd_obj_to_bin ?= $(OBJCOPY) --gap-fill=0xff -O binary $^ $(out)/$*.bin.tmp
cmd_flat_to_obj = $(CC) -T $(out)/firmware_image.lds -nostdlib $(CPPFLAGS) \
                  -Wl,--build-id=none -o $@ $<
# Allow the .roshared section to overlap other sections (itself)
cmd_ec_elf_to_flat ?= $(OBJCOPY) --set-section-flags .roshared=share \
				-O binary $< $@
cmd_elf_to_signed ?= $(SIGNER) --key=util/signer/$(3) \
	--b --input=$< --format=bin --output=$@.signed $(SIGNER_EXTRAS) \
	&& sudo chown $(shell whoami) $@.signed && mv $@.signed $@
cmd_elf_to_dis = $(OBJDUMP) -D $< > $@
cmd_elf_to_hex = $(OBJCOPY) -O ihex $< $@
cmd_bin_to_hex = $(OBJCOPY) -I binary -O ihex \
	--change-addresses $(_program_memory_base) $^ $@
cmd_smap = $(NM) $< | sort > $@
cmd_elf = $(CC) $(objs) $(libsharedobjs_elf-y) $(LDFLAGS) \
	-o $@ -Wl,-T,$< -Wl,-Map,$(patsubst %.elf,%.map,$@)
cmd_exe = $(CC) $(ro-objs) $(HOST_TEST_LDFLAGS) -o $@
cmd_c_to_o = $(CC) $(CFLAGS) -MMD -MF $@.d -c $< -o $(@D)/$(@F)
cmd_c_to_build = $(BUILDCC) $(BUILD_CFLAGS) \
	         $(sort $(foreach c,$($(*F)-objs),util/$(c:%.o=%.c)) $*.c) \
	         $(BUILD_LDFLAGS) \
	         -MMD -MF $@.d -o $@
cmd_c_to_host = $(HOSTCC) $(HOST_CFLAGS) $(HOST_LDFLAGS) -MMD -MF $@.d  -o $@ \
	         $(sort $(foreach c,$($(*F)-objs),util/$(c:%.o=%.c)) $*.c)
cmd_cxx_to_host = $(HOSTCXX) -std=c++0x $(COMMON_WARN) $(HOST_CXXFLAGS)\
	-I ./$($(notdir $@)_ROOT) -o $@ $(filter %.cc,$^) $($(notdir $@)_LIBS)
cmd_host_test = ./util/run_host_test $* $(silent)
cmd_version = ./util/getversion.sh > $@
cmd_mv_from_tmp = mv $(out)/$*.bin.tmp $(out)/$*.bin
cmd_extractrw-y = dd if=$(out)/$(PROJECT).bin.tmp of=$(out)/$(PROJECT).RW.bin \
	       bs=1 count=$(_rw_size) skip=$(_rw_off) $(silent_err)
cmd_copyrw-y = cd $(out) && cp RW/$(PROJECT).RW.flat RW/$(PROJECT).RW.bin
cmd_sharedlib_elf = $(CC) $(libsharedobjs_deps) \
	-Wl,-T,common/ec.$(SHOBJLIB).ld $(LDFLAGS) \
	-o $(out)/$(SHOBJLIB)/$(SHOBJLIB).elf \
	-Wl,-Map,$(out)/$(SHOBJLIB)/$(SHOBJLIB).map

# commands for RSA signature: rwsig does not need to sign the whole image
# (it signs the RW part separately). usbpd1 type needs to sign the final image.
ifeq ($(CONFIG_RWSIG_TYPE_RWSIG),)
	cmd_rsasign = futility sign --type usbpd1 --pem $(PEM) $(out)/$*.bin.tmp
else
	cmd_rsasign =
endif

cmd_key_extract = futility create $(PEM) $(out)/$* $(silent)

cmd_rsasign_rwsig = futility sign --type rwsig \
                                    --prikey $(out)/key.vbprik2 $< $@

# commands to build optional xref files
cmd_deps_to_list = cat $(deps) | tr -d ':\\' | tr ' ' '\012' \
	| egrep '\.[chS]$$' | sort | uniq > $@
cmd_etags = etags -o $@ $(shell cat $<)
cmd_ctags = ctags -o $@ $(shell cat $<)
targ_if_prog = $(if $(shell which $(1) 2>/dev/null),$(2),)

# By default, the "build_boards" and "try_build_boards" targets will build all
# of the boards listed in $(boards). However, the invoker can provide a
# different list via the BOARDS variable. Providing an empty value for BOARDS
# is not allowed.
BOARDS ?= $(boards)
ifeq ($(BOARDS),)
$(error BOARDS must be non-empty)
endif

FAILED_BOARDS_DIR = .failedboards
# When building with -j, it's easy to miss errors. If you don't have your shell
# configured to warn you about nonzero exit, you may not even notice that "make
# buildall -j" failed. To make it more obvious, we'll do one level of recursion
# here.
.PHONY: try_build_boards
try_build_boards: $(foreach b, $(BOARDS), proj-$(b))

.PHONY: build_boards
build_boards:
	@rm -rf $(FAILED_BOARDS_DIR)
	@mkdir $(FAILED_BOARDS_DIR)
	@for b in $(BOARDS); do echo 'starting' > $(FAILED_BOARDS_DIR)/$$b; done
	$(MAKE) try_build_boards

.PHONY: buildall
buildall: build_boards
	$(MAKE) build_cts
	$(MAKE) runtests
	@touch .tests-passed
	@echo "$@ completed successfully!"

showboards:
	@echo $(sort $(boards))

# Print any important notices at the end of the build.
.PHONY: notice
notice: $(config)
ifeq ($(CONFIG_EXPERIMENTAL_CONSOLE),y)
ifeq ($(TEST_BUILD),)
	@echo "*** NOTE: The experimental console is ENABLED. ***"
	@echo "You will need to run the EC-3PO interactive console in the util"
	@echo "directory!  Otherwise, you won't be able to enter any commands."
endif # not a TEST_BUILD
endif # CONFIG_EXPERIMENTAL_CONSOLE=y

proj-%:
	@echo 'building' > $(FAILED_BOARDS_DIR)/$*
	@echo "======= building $*"
	$(MAKE) --no-print-directory BOARD=$* V=$(V)
	@rm $(FAILED_BOARDS_DIR)/$*

dis-y := $(out)/RW/$(PROJECT).RW.dis
dis-$(CONFIG_FW_INCLUDE_RO) += $(out)/RO/$(PROJECT).RO.dis
dis-$(CONFIG_SHAREDLIB) += $(out)/$(SHOBJLIB)/$(SHOBJLIB).dis
dis: $(dis-y)
.PHONY: dis

hex-y := $(out)/RO/$(PROJECT).RO.hex $(out)/RW/$(PROJECT).RW.hex $(out)/$(PROJECT).hex
hex: $(hex-y)
.PHONY: hex

.PHONY: utils-host
utils-host: $(host-utils)

.PHONY: utils-build
utils-build: $(build-utils)

.PHONY: utils
utils: utils-host utils-build

# On board test binaries
test-targets=$(foreach t,$(test-list-y),test-$(t))
.PHONY: $(test-targets)

ifeq "$(CONFIG_COMMON_RUNTIME)" "y"
$(test-targets): test-%:
	@set -e ; \
	$(call echo,"  BUILD   $(out)/$*") \
	$(MAKE) --no-print-directory BOARD=$(BOARD) PROJECT=$* \
	        V=$(V) out=$(out)/$* TEST_BUILD=y; \
	cp $(out)/$*/$*.bin $(out)/test-$*.bin
endif

.PHONY: tests
tests: $(test-targets)

# Emulator test executables
host-test-targets=$(foreach t,$(test-list-host),host-$(t))
run-test-targets=$(foreach t,$(test-list-host),run-$(t))
.PHONY: $(host-test-targets) $(run-test-targets)

$(host-test-targets): host-%:
	@set -e ; \
	$(call echo,"  BUILD   host - build/host/$*") \
	$(MAKE) --no-print-directory BOARD=host PROJECT=$* \
	        V=$(V) out=build/host/$* TEST_BUILD=y EMU_BUILD=y $(TEST_FLAG) \
		CROSS_COMPILE= build/host/$*/$*.exe

$(run-test-targets): run-%: host-%
	$(call quiet,host_test,TEST   )

.PHONY: hosttests runtests
hosttests: $(host-test-targets)
runtests: $(run-test-targets)

# Automatically enumerate all suites.
cts_excludes := common
cts_suites := $(filter-out $(cts_excludes), \
	$(shell find cts -maxdepth 1 -mindepth 1 -type d -printf "%f "))

# Add boards below as CTS is expanded.
cts_boards := stm32l476g-eval nucleo-f072rb

.PHONY: build_cts

# Create CTS rule automatically for given suite and board
# $1: suite name
# $2: board name
define make-cts =
build_cts: cts-$(1)-$(2)
cts-$(1)-$(2):
	$$(MAKE) CTS_MODULE=$(1) BOARD=$(2)
# Do not remove this blank line

endef

# Create rules for all cts-suite-board combinations. Additionally, we serialize
# targets per board: cts-x-board -> cts-y-board -> ...
# If we don't serialize targets, parallel make fails because all suites
# try to produce ec.bin in the same directory (e.g. build/stm32l476g-eval).
$(foreach b, $(cts_boards), \
	$(foreach s, $(cts_suites), \
		$(eval $(call make-cts,$(s),$(b))) \
	) \
)

cov-test-targets=$(foreach t,$(test-list-host),build/host/$(t).info)
bldversion=$(shell (./util/getversion.sh ; echo VERSION) | $(CPP) -P)

# lcov fails when multiple instances run at the same time.
# We need to run them sequentially by using flock
cmd_lcov=flock /tmp/ec-lcov-lock -c "lcov -q -o $@ -c -d build/host/$*"
cmd_report_cov=genhtml -q -o build/host/coverage_rpt -t \
	       "EC Unittest "$(bldversion) $^

build/host/%.info: run-%
	$(call quiet,lcov,COV    )

.PHONY: coverage
coverage: TEST_FLAG=TEST_COVERAGE=y
coverage: $(cov-test-targets)
	$(call quiet,report_cov,REPORT )

$(out)/firmware_image.lds: common/firmware_image.lds.S
	$(call quiet,lds,LDS    )
$(out)/%.lds: core/$(CORE)/ec.lds.S
	$(call quiet,lds,LDS    )

$(out)/%_B.lds: core/$(CORE)/ec.lds.S
	$(call quiet,lds_b,LDS_B  )

$(out)/%.bin: $(out)/%.obj
	$(call quiet,obj_to_bin,OBJCOPY)
	$(if $(wildcard $(PEM)),$(call quiet,rsasign,SIGN   ),)
	$(if $(wildcard $(PEM)),$(call quiet,extractrw-y,EXTR_RW), \
			$(call quiet,copyrw-y,COPY_RW))
	$(call quiet,mv_from_tmp,MV     )

flat-y := $(out)/RW/$(PROJECT).RW.flat
flat-$(CONFIG_FW_INCLUDE_RO) += $(out)/RO/$(PROJECT).RO.flat

deps += $(out)/firmware_image.lds.d $(flat-y:%.flat=%.lds.d)

flat-$(CONFIG_RWSIG_TYPE_RWSIG) += $(out)/key.vbpubk2
flat-$(CONFIG_RWSIG_TYPE_RWSIG) += $(out)/RW/$(PROJECT).RW.flat.sig

flat-$(CONFIG_SHAREDLIB) += $(libsharedobjs-y)

$(out)/$(PROJECT).obj: common/firmware_image.S $(out)/firmware_image.lds \
	$(flat-y)
	$(call quiet,flat_to_obj,CAT    )

$(out)/%.dis: $(out)/%.elf
	$(call quiet,elf_to_dis,OBJDUMP)

$(out)/RW/%.hex: $(out)/RW/%.elf $(out)/RW/%.smap
	$(call quiet,elf_to_hex,OBJCOPY)

ifeq ($(SIGNED_IMAGES),)
$(out)/%.flat: $(out)/%.elf $(out)/%.smap utils-build
	$(call quiet,ec_elf_to_flat,OBJCOPY)

$(out)/RO/%.hex: $(out)/RO/%.elf $(out)/RO/%.smap
	$(call quiet,elf_to_hex,OBJCOPY)
else
$(out)/RO/%.flat: $(out)/RO/%.elf  $(out)/RO/%.smap
	$(call quiet,elf_to_signed,RO_SIGN,$(CR50_RO_KEY))

$(out)/RW/%.flat: $(out)/RW/%.elf  $(out)/RW/%.smap
	$(call quiet,elf_to_signed,RW_SIGN,$(CR50_RW_KEY))

$(out)/RO/%.hex: $(out)/RO/%.flat
	$(call quiet,bin_to_hex,OBJCOPY)
endif
$(out)/$(PROJECT).hex: $(out)/$(PROJECT).bin
	$(call quiet,bin_to_hex,OBJCOPY)

$(out)/%.vbprik2 $(out)/%.vbpubk2: $(PEM)
	$(call quiet,key_extract,KEY    )

$(out)/RW/%.flat.sig: $(out)/RW/%.flat $(out)/key.vbprik2
	$(call quiet,rsasign_rwsig,SIGN   )

$(out)/RW/%.elf: override BLD:=RW
$(out)/RW/%.elf: private objs := $(rw-objs)
$(out)/RW/%.elf: $(out)/RW/%.lds $(rw-objs) $(libsharedobjs_elf-y)
	$(call quiet,elf,LD     )

$(out)/RO/%.elf: override BLD:=RO
$(out)/RO/%.elf: private objs := $(ro-objs)
$(out)/RO/%.elf: $(out)/RO/%.lds $(ro-objs) $(libsharedobjs_elf-y)
	$(call quiet,elf,LD     )

$(out)/%.elf: $(out)/%.lds $(objs)
	$(call quiet,elf,LD     )

$(out)/$(SHOBJLIB)/$(SHOBJLIB).elf: $(sharedlib-objs)
	@mkdir -p $(out)/$(SHOBJLIB)
	$(call quiet,sharedlib_elf,LD     )

$(out)/%.smap: $(out)/%.elf
	$(call quiet,smap,NM     )

$(out)/$(PROJECT).exe: $(ro-objs)
	$(call quiet,exe,EXE    )

$(out)/RO/%.o:%.c
	$(call quiet,c_to_o,CC     )
$(out)/RW/%.o:%.c
	$(call quiet,c_to_o,CC     )

$(out)/$(SHOBJLIB)/%.o: override LATE_CFLAGS_DEFINE:=-DSHAREDLIB_IMAGE
$(out)/$(SHOBJLIB)/%.o:%.c
	$(call quiet,c_to_o,CC     )

$(out)/RO/%.o:%.S
	$(call quiet,c_to_o,AS     )
$(out)/RW/%.o:%.S
	$(call quiet,c_to_o,AS     )


# Conditionally force the rebuilding of ec_version.h only if it would be
# changed.
old_version_hash := $(shell cat $(out)/ec_version.h 2> /dev/null | md5sum -)
new_version_hash := $(shell BOARD=$(BOARD) ./util/getversion.sh | md5sum -)

ifneq ($(old_version_hash),$(new_version_hash))
.PHONY: $(out)/ec_version.h
endif

# All of the objects have an order only dependency on the ec_version header.
# This ensures that if ec_version.h needs to be built (because it was marked
# PHONY above) then it will be rebuilt before any objects.  This is important
# because some source files will include ec_version.h and fail to compile if
# it doesn't already exist.  This dependency shouldn't be a normal dependency
# because that would cause every object to be rebuilt when ec_version.h
# changes, instead of just the ones that actually depend on it.  The objects
# that truly depend on ec_version.h will have that information encoded in their
# .d file.
$(ro-objs): | $(out)/ec_version.h
$(rw-objs): | $(out)/ec_version.h
$(sharedlib-objs): | $(out)/ec_version.h

$(out)/ec_version.h:
	$(call quiet,version,VERSION)

$(build-utils): $(out)/%:$(build-srcs)
	$(call quiet,c_to_build,BUILDCC)

$(host-utils): $(out)/%:$(host-srcs)
	$(call quiet,c_to_host,HOSTCC )

$(out)/cscope.files: $(out)/$(PROJECT).bin
	$(call quiet,deps_to_list,SH     )

$(out)/TAGS: $(out)/cscope.files
	$(call quiet,etags,ETAGS  )

$(out)/tags: $(out)/cscope.files
	$(call quiet,ctags,CTAGS  )

# TODO: optional make rules for PROJECT_EXTRA
$(npcx-flash-fw-bin):
	$(if $(V),,@echo '  EXTBIN ' $(subst $(out)/,,$@) ; )
	-@ mkdir -p $(@D)
	-@ $(CC) $(CFLAGS) -MMD -MF $(out)/$(npcx-lfw).d -c $(npcx-flash-fw).c \
		-o $(out)/$(npcx-flash-fw).o
	-@ $(CC) $(out)/$(npcx-flash-fw).o $(LDFLAGS) \
		-o $(out)/$(npcx-flash-fw).elf -Wl,-T,$(npcx-flash-fw).ld \
		-Wl,-Map,$(out)/$(npcx-flash-fw).map
	-@ $(OBJCOPY) -O binary $(out)/$(npcx-flash-fw).elf $@

.PHONY: xrefs
xrefs: $(call targ_if_prog,etags,$(out)/TAGS) \
	$(call targ_if_prog,ctags,$(out)/tags)

.PHONY: flash
flash: $(out)/ec.bin
	openocd -c "set BOARD $(BOARD)"\
		-c "set BUILD_DIR $(out)"\
		-f $(BDIR)/openocd-flash.cfg

.PHONY: flash_ec
flash_ec: $(out)/ec.bin
	./util/flash_ec --board $(BOARD) --image $(out)/ec.bin

.PHONY: flash_dfu
flash_dfu: $(out)/ec.bin
	sudo ./$(BDIR)/dfu $(out)/ec.bin

.PHONY: clean
clean:
	-rm -rf $(out)

.PHONY: clobber
clobber:
	-rm -rf build TAGS cscope.files cscope.out
ifneq ($(CCACHE),)
	$(CCACHE) -c
endif

.PHONY: help
help:
	@echo "Google Chromium EC build"
	@echo "Common Targets:"
	@echo "  all   [BOARD=]       - Build a single board (Default target)"
	@echo "  clean [BOARD=]       - Clean a single board"
	@echo "  buildall             - Build and test all boards"
	@echo "  clobber              - Clean all boards"
	@echo "  proj-<boardname>     - Build a single board (similar to 'all BOARD=boardname')"
	@echo "  savesizes            - Save the filesizes of currently built boards for comparison"
	@echo "  newsizes             - Compare previously saved filesizes against new sizes"
	@echo "Common Variables:"
	@echo "  V=1                  - Show make output"
	@echo "  BOARD=               - Set the board name to build (Default is $(BOARD))"
	@echo "  CROSS_COMPILE=       - Set the compiler for the board"
	@echo "  CROSS_COMPILE_arch=  - Set the compiler for arch"
	@echo "     The board picks its CROSS_COMPILE_arch if CROSS_COMPILE is not set."
	@echo "     arch may be one of 'arm', 'i386', 'nds32'."
	@echo "Example:"
	@echo "  make BOARD=reef CROSS_COMPILE_arm='arm-eabi-'"

.PHONY: savesizes
savesizes:
	@find $(BUILD_DIR) -name '*.flat' -printf "%s %p\n" | sort --key 2 > \
		$(FLATSIZE_FILE)
	@if [ -s $(FLATSIZE_FILE) ]; then \
		echo "Saved sizes for $$(cat $(FLATSIZE_FILE) | wc -l) files"; \
	else \
		echo "Error: No file sizes saved.  Are they built?"; \
	fi

.PHONY: newsizes
newsizes:
	@if [ ! -s "$(FLATSIZE_FILE)" ]; then \
		echo "Error: no saved size file ($(FLATSIZE_FILE))."; \
		echo " Run 'make savesizes' first"; \
		exit 1; \
	fi
	@FILES_CHANGED=0; \
	FILES_IN_LIST=0; \
	FILES_COMPARED=0; \
	FILE_SIZE_CHANGE=0; \
	NEW_SIZES=$$(find $(BUILD_DIR) -name '*.flat' -printf "%s %p\n"); \
	while read -r -u 10 line; do \
		FILES_IN_LIST=$$((FILES_IN_LIST+1)); \
		FLATFILE=$$(echo "$$line" | cut -f2 -d ' '); \
		FLATSIZE_ORG=$$(echo "$$line" | cut -f1 -d ' '); \
		FLATSIZE_NEW="$$(grep "$$FLATFILE" <<< "$$NEW_SIZES" | \
			sed 's/ .*$$//')"; \
		if [ -n "$$FLATSIZE_NEW" ]; then \
			FILES_COMPARED=$$((FILES_COMPARED+1)); \
			if [ "$$FLATSIZE_NEW" -gt "$$FLATSIZE_ORG" ]; then \
				FILES_CHANGED=$$((FILES_CHANGED+1)); \
				FILE_SIZE_CHANGE=$$((FILE_SIZE_CHANGE+ \
				FLATSIZE_NEW-FLATSIZE_ORG)); \
				printf "%s grew by %s bytes: (%d to %d)\n" \
					"$$FLATFILE" \
					"$$((FLATSIZE_NEW-FLATSIZE_ORG))" \
					"$$FLATSIZE_ORG" "$$FLATSIZE_NEW"; \
			elif [ "$$FLATSIZE_NEW" -lt "$$FLATSIZE_ORG" ]; then \
				FILES_CHANGED=$$((FILES_CHANGED+1)); \
				FILE_SIZE_CHANGE=$$((FILE_SIZE_CHANGE+ \
				FLATSIZE_NEW-FLATSIZE_ORG)); \
				printf "%s shrank by %s bytes: (%d to %d)\n" \
					"$$FLATFILE" \
					"$$((FLATSIZE_ORG-FLATSIZE_NEW))" \
					"$$FLATSIZE_ORG" "$$FLATSIZE_NEW"; \
			fi; \
		fi; \
	done 10< "$(FLATSIZE_FILE)"; \
	echo "Compared $$FILES_COMPARED of $$FILES_IN_LIST files."; \
	if [ $$FILES_COMPARED -ne 0 ] && [ $$FILES_CHANGED -eq 0 ]; then \
		echo "File sizes are unchanged."; \
	else \
		printf "%d files changed.\n" "$$FILES_CHANGED"; \
		printf "Total size change: %s bytes.\n" "$$FILE_SIZE_CHANGE"; \
		printf "Average size change: %d bytes.\n" \
			"$$((FILE_SIZE_CHANGE / FILES_CHANGED))"; \
	fi

.SECONDARY:

-include $(deps)
