#
# Makefile for the sources of Fiasco
#

.PHONY: all do-all
all: do-all

TOPDIR=..
include $(TOPDIR)/Makeconf

srcdir = .
include $(srcdir)/Makeconf

#
# Tools configuration
#

# configure the name of the C/C++ compiler (gcc, egcc)
# (You should do this in $(L4DIR)/Makeconf.local or ./Makeconf.local,
# not here.)
#CC = $(SYSTEM_TARGET)egcc
#CXX = $(CC)

#CFLAGS := 
# only pass the -fno-exceptions argument to gcc if it understands it
#CXXFLAGS := 

TOOLDIR=$(srcdir)/../tool

MOVE_IF_CHANGE = $(TOOLDIR)/move-if-change
SHOWDEPS = $(TOOLDIR)/showdeps

PREPROCESS = $(TOOLDIR)/preprocess
PREPROCESS_FLAGS ?= -i -L

#
# Source-code locations
#

MODULES_FILE = Modules

$(MODULES_FILE): $(srcdir)/$(MODULES_FILE).in
	@if [ -f $@ -a -f $< ]; \
	  then \
	    echo "$@.in is newer -- please update $@"; exit 1; \
	  fi
	@if [ ! -f $@ ]; \
	  then \
	    echo "No user-specific modules file found -- trying $@.in"; \
	    cp $< $@; \
	  fi

$(srcdir)/$(MODULES_FILE).in:

include $(MODULES_FILE)
ifdef SUBSYSTEMS
 _modules_read_ = true
endif

ifdef _modules_read_
GENERATED_MODULES = $(sort $(foreach subsys, $(SUBSYSTEMS), \
		      $(INTERFACES_$(subsys))))

$(foreach m, $(GENERATED_MODULES), auto/stamp-$(m).ready): $(MODULES_FILE)

.PRECIOUS: .Modules.deps
.Modules.deps: $(MODULES_FILE)
	@mkdir -p auto
	@echo "Creating $@"
	@($(foreach mod, $(GENERATED_MODULES), \
	    echo 'auto/stamp-$(mod).ready: \
		  $(addsuffix .cpp, $(if $($(mod)_IMPL), $($(mod)_IMPL), \
							 $(mod)))'; \
	    echo '$(patsubst %, auto/%.cc, \
		    $(if $($(mod)_IMPL), $($(mod)_IMPL), $(mod))): \
		  auto/stamp-$(mod).ready ; \
	          @[ -e $$@ ] || { rm -f $$<; $$(MAKE) $$<; }'; \
	    $(foreach impl, $(if $($(mod)_IMPL), $($(mod)_IMPL), $(mod)), \
	      echo '$(patsubst %, .%.cc.d, $(impl)): \
	            $(patsubst %, auto/%.cc, $(impl))';) \
	  )) > $@.new
	@($(foreach subsys, $(SUBSYSTEMS), \
	    echo 'IFDEPS += $(addprefix ., $(addsuffix .cc.d, \
					$(foreach in,$(INTERFACES_$(subsys)), \
					  $(if $($(in)_IMPL), $($(in)_IMPL), \
							      $(in)))))' ; \
	    echo 'CXXSRC_$(subsys) += $(addsuffix .cc, \
					$(foreach in,$(INTERFACES_$(subsys)), \
					  $(if $($(in)_IMPL), $($(in)_IMPL), \
							      $(in))))' ; \
	    echo 'OBJ_$(subsys) += $$(CXXSRC_$(subsys):.cc=.o) \
		                   $$(CSRC_$(subsys):.c=.o)' ; ) ) >> $@.new
	@echo "_modules_deps_read_ = true" >> $@.new
	@mv $@.new $@
# Avoid attempts to update other Makefile fragments -- restart cleanly
	$(MAKE) $(MAKECMDGOALS)

include .Modules.deps
endif # _modules_read_

ifdef _modules_deps_read_

# Add srcdir to dirs in public variables modified by Modules file
ifneq ($(srcdir),.)
 ifeq ($(VPATH),)
 VPATH := .
 endif
VPATH := $(VPATH) $(addprefix $(srcdir)/, $(VPATH))
PRIVATE_INCDIR := $(PRIVATE_INCDIR) $(addprefix $(srcdir)/, $(PRIVATE_INCDIR))
endif

VPATH += auto
PRIVATE_INCDIR += auto

SRCS =  $(foreach subsys,$(SUBSYSTEMS),$(CXXSRC_$(subsys)) $(CSRC_$(subsys)))
DEPS = $(patsubst %, .%.d, $(SRCS))

CRTN = $(word 1, $(wildcard $(OSKITDIR)/lib/crtn.o $(DROPS_STDLIBDIR)/flux_crt/crtn.o))

LIBGCC = $(shell $(CXX) --print-libgcc-file-name)

#
# Compilation flags
#

#OPT_FLAGS = -O6
SHARED_FLAGS += 
PROF_FLAGS = -pg

ifdef PROFILE
SHARED_FLAGS += $(PROF_FLAGS)
CPPFLAGS += -DPROFILE
endif

# EXTRA_FLAGS can be stuff like:
#EXTRA_FLAGS = -DNDEBUG -DNO_FRAME_PTR -fomit-frame-pointer

CFLAGS += $(SHARED_FLAGS) $(EXTRA_FLAGS)
CXXFLAGS += $(SHARED_FLAGS) $(EXTRA_FLAGS)
ASFLAGS += $(SHARED_FLAGS) $(EXTRA_FLAGS)

STD_LIBS = -L $(OSKITDIR)/lib -L $(DROPS_STDLIBDIR) -lkern -lmc -llmm $(LIBGCC)

#
# End of configuration settings -- rules follow
#

%.o:    %.S
	$(COMP_MESSAGE)
	$(VERBOSE)$(CC) -c $(CPPFLAGS) $(ASFLAGS) $< -o $@

#
# special: build certain sources without profiling flags
#
NOPROFILE_C =  $(foreach cfile, $(addsuffix .c, $(NOPROFILE)), \
			 $(findstring $(cfile), $(filter %.c, $(SRCS))))
NOPROFILE_CC = $(foreach cfile, $(addsuffix .cc, $(NOPROFILE)), \
			 $(findstring $(cfile), $(filter %.cc, $(SRCS))))
NOOPT_C =  $(foreach cfile, $(addsuffix .c, $(NOOPT)), \
			 $(findstring $(cfile), $(filter %.c, $(SRCS))))
NOOPT_CC = $(foreach cfile, $(addsuffix .cc, $(NOOPT)), \
			 $(findstring $(cfile), $(filter %.cc, $(SRCS))))

$(NOPROFILE_CC:.cc=.o) : %.o: %.cc
	$(COMP_MESSAGE)
	$(VERBOSE)$(CXX) $(filter-out $(PROF_FLAGS),$(CXXFLAGS) $(CPPFLAGS)) -c $< -o $@

$(NOPROFILE_C:.c=.o) : %.o: %.c
	$(COMP_MESSAGE)
	$(VERBOSE)$(CC)  $(filter-out $(PROF_FLAGS),$(CFLAGS) $(CPPFLAGS)) -c $< -o $@

$(NOOPT_CC:.cc=.o) : %.o: %.cc
	$(COMP_MESSAGE)
	$(VERBOSE)$(CXX) $(filter-out $(OPT_FLAGS),$(CXXFLAGS) $(CPPFLAGS)) -c $< -o $@

$(NOOPT_C:.c=.o) : %.o: %.c
	$(COMP_MESSAGE)
	$(VERBOSE)$(CC)  $(filter-out $(OPT_FLAGS),$(CFLAGS) $(CPPFLAGS)) -c $< -o $@

#
# Subsystem-specific rules and targets
#
ALL = $(foreach subsys, $(SUBSYSTEMS), $($(subsys)) $($(subsys)_EXTRA))
do-all: $(ALL)

OBJ = $(foreach subsys, $(SUBSYSTEMS), $(OBJ_$(subsys)))
do-obj: $(OBJ)

include $(foreach subsys, $(SUBSYSTEMS), Makerules.$(subsys))

#
# Auto-created source files
#

.PRECIOUS: auto/stamp-%.ready

# Basename of implementation files = Basename of first .cpp file
impl_name = $(basename $(word 1, $(filter %.cpp, $(notdir $(1)))))

$(foreach m, $(GENERATED_MODULES), auto/stamp-$(m).ready ): \
auto/stamp-%.ready:
ifneq ($(VERBOSE),)
	@echo "  ... Preprocessing $^"
endif
	$(VERBOSE)$(PREPROCESS) $(PREPROCESS_FLAGS) -p auto/new_ \
	  -h $* -c $(call impl_name,$^) $(filter %.cpp, $^)
	@for i in $*.h $(call impl_name,$^)_i.h \
	    $(patsubst %.cpp, %.cc, $(filter %.cpp, $(notdir $^))); \
	  do \
	    $(MOVE_IF_CHANGE) auto/new_$$i auto/$$i || exit 1; \
	  done
	$(VERBOSE)touch $@

.PRECIOUS: %.cc %.h %_i.h

auto:
	mkdir auto

###

DEPS.dot:	$(SRCS)
	rm -f $@.new
	for i in $^; \
	  do \
	    echo $$(basename $$i): $$(perl -n -e \
              '/\#include\s+"(.*).h"/ && print "$$1 "; next;' \
              $$i $$(dirname $$i)/$$(basename $$i .cc).h \
	          $$(dirname $$i)/$$(basename $$i .cc)_i.h); \
	  done | $(SHOWDEPS) dot \
	  | perl -pe '$$_ = "" if /(config|jdb|globals) ->/;\
		      $$_ = "" if /thread_i\b/;\
		      s/(lock_guard|atomic|kdb_ke|config|globals)(?!_);?(?!\s*->)//g;' > $@.new
	mv $@.new $@

DEPS:		$(SRCS) 
	for i in $^; \
	  do \
	    echo $$(basename $$i): $$(perl -n -e \
              '/\#include\s+"(.*).h"/ && print "$$1 "; next;' \
              $$i $$(dirname $$i)/$$(basename $$i .cc).h \
	          $$(dirname $$i)/$$(basename $$i .cc)_i.h); \
	  done | $(SHOWDEPS)  > $@.new
	mv $@.new $@

ifneq ($(MAKECMDGOALS),clean)
ifneq ($(MAKECMDGOALS),cleanall)

include $(IFDEPS)
-include $(filter-out $(IFDEPS), $(DEPS)) /dev/null

endif # make cleanall
endif # make clean

else  # ! _modules_deps_read_

do-all:

endif # ! _modules_deps_read_

###

.PHONY: TAGS clean cleanall $(foreach subsys, $(SUBSYSTEMS), clean-$(subsys))
TAGS:
	( find $(srcdir) $(filter-out auto,$(PRIVATE_INCDIR)) \
	  -type f -name '*.h' ; \
	  find $(srcdir) $(filter-out auto,$(PRIVATE_INCDIR)) \
	  -type f -name '*.cpp' -o -name '*.cc' -o -name '*.c'; \
	 ) | etags --members --language=c++ -

clean: $(foreach subsys, $(SUBSYSTEMS), clean-$(subsys))
	rm -f $(ALL)
	rm -f *.o
	rm -f auto/*.cc auto/*.h auto/stamp-*.ready

cleanall: clean
	rm -f .*.d *~
	rm -f .Modules.deps

-include Makerules.local