### The build commands and verbosity

# If we are verbose, we will show commands prefixed by $(Q) (which acts as
# @ in the non-verbose mode), and we will show the "real" cmds instead of
# their quiet versions (which are used in the non-verbose mode).
# Inspired by the Linux kernel build system.
ifdef V
	Q =
	quiet =
	mquiet = masq_
else
	Q = @
	quiet = quiet_
	mquiet = quiet_
endif

# Show the command (quiet or non-quiet version based on the assignment
# just above) and then execute it.
ncmd = $(if $($(quiet)cmd_$(1)),echo $($(quiet)cmd_$(1)) &&) $(cmd_$(1))
cmd = @$(if $($(quiet)cmd_$(1)),echo $($(quiet)cmd_$(1)) &&) $(cmd_$(1))
mcmd = @$(if $($(mquiet)cmd_$(1)),echo $($(mquiet)cmd_$(1)) &&) $(cmd_$(1))

quiet_cmd_compile = '[CC]   $<'
 masq_cmd_compile = $(COMPILE) -c $<
      cmd_compile = $(COMPILE) -Wp,-MD,.deps/$(*F).pp -c $<

quiet_cmd_archive = '[AR]   $@'
      cmd_archive = $(AR) r $@ $^

   quiet_cmd_link = '[LINK] $@'
         cmd_link = $(LINK) -o $@ $^

# Recursive make
quiet_cmd_recmake = "[MAKE $$target]   $$subdir"
      cmd_recmake = $(MAKE) -C $$subdir $$target



### Internal build rules

CFLAGS += $(CUSTOM_CFLAGS) $(SYS_CFLAGS) $(INCLUDES)
CXXFLAGS += $(CUSTOM_CFLAGS) $(SYS_CFLAGS) $(INCLUDES)
COMPILE = $(CXX) $(CXXFLAGS)
LINK = $(CXX) $(LDFLAGS) $(LIBS)

DEP_FILES_1 = $(foreach src,$(OBJS),.deps/$(src))
DEP_FILES = $(DEP_FILES_1:%.o=%.P)

DEPS_MAGIC := $(shell mkdir .deps > /dev/null 2>&1 || :)

ifdef DEP_FILES
-include $(DEP_FILES)
endif

%.o: %.cc
	$(call mcmd,compile)
	@-cp .deps/$(*F).pp .deps/$(*F).P; \
		tr ' ' '\012' < .deps/$(*F).pp \
			| sed -e 's/^\\$$//' -e '/^$$/ d' -e '/:$$/ d' -e 's/$$/ :/' \
			>> .deps/$(*F).P; \
		rm .deps/$(*F).pp

%.a:
	$(call cmd,archive)


# Recursion:

.PHONY: all-recursive clean-recursive
all-recursive clean-recursive:
	@target=`echo $@ | sed s/-recursive//`; \
	for subdir in $(SUBDIRS); do \
		$(call ncmd,recmake) || exit 1; \
	done