-include $(LEVEL)/Makefile.config

###############################################################################
#   Configuration
###############################################################################
PROJ_OBJ_CWD:= $(call realpath, .)
PROJ_SRC_CWD:= $(call realpath, $(patsubst $(PROJ_OBJ_ROOT)%,$(PROJ_SRC_ROOT)%,$(PROJ_OBJ_CWD)))

ifndef BUILD_NAME
BUILD_NAME=fake
endif

BUILD_DIR=$(PROJ_OBJ_CWD)/$(BUILD_NAME)
BIN_DIR=$(PROJ_OBJ_ROOT)/$(BUILD_NAME)/bin
LIB_DIR=$(PROJ_OBJ_ROOT)/$(BUILD_NAME)/lib

###############################################################################
#   Nice printing
###############################################################################
ifndef PROF
PROF=.
endif

EchoMsg="[$(MAKECMDGOALS) $(PROF)]:"
Echo=@echo $(EchoMsg)

ifndef VERBOSE
	SUB_OPT=--no-print-directory -s
  Verb:=@
endif

###############################################################################
#   Compilation flags
###############################################################################
COMMON_FLAGS:=-Wall -Wno-return-type-c-linkage -Wno-varargs -Wno-unused-private-field -Werror -Wno-unused-variable \
		-I$(PROJ_SRC_ROOT)/include -I$(OPENJDK_HOME)/include -I$(OPENJDK_HOME)/include/$(OS) $(COMMON_FLAGS)

ifeq ($(OPTIMIZED),1)
	COMMON_FLAGS+=-O3
	LLCFLAGS+=-O=3
else
	COMMON_FLAGS+=-O0
	LLCFLAGS+=-O=0
endif

ifneq ($(DEBUG),0)
	COMMON_FLAGS+=-g
endif

#LLCFLAGS+=-disable-cfi -disable-fp-elim -relocation-model=pic 
#OPTFLAGS+=-disable-cfi -disable-fp-elim -disable-opt

LLCFLAGS+=-relocation-model=pic 
OPTFLAGS+=-disable-opt

CXXFLAGS=$(LLVM_CXXFLAGS) $(COMMON_FLAGS) -std=gnu++98 -fPIC
SHFLAGS=-lpthread -ldl -lz -lncurses -framework CoreFoundation -fno-common -Wl,-flat_namespace -Wl,-undefined,suppress

###############################################################################
#   Targets
###############################################################################
.PHONY: all all-parallel-recursive clean clean-parallel-recursive clean-local tidy confclean check
.SECONDARY:
.SUFFIXES:

###############################################################################
#   Recursive target managment
###############################################################################
RECURSIVE_TARGETS=all clean

define do_parallel_subdirs
$1-parallel-recursive::
  #$(Echo) "Entering directory $$(PROF)/$2"
	$(Verb) +$(MAKE) $(SUB_OPT) -C $2 $1 PROF=$(PROF)/$2 VERBOSE=$(VERBOSE); \
		if [ $$$$? != 0 ]; then echo "$$(EchoMsg) abort with errors in $$(PROF)/$2"; exit 1; fi
endef

define do_recursive_target
$1:
	$(Verb) for f in $$(DIRS); do \
					$(MAKE) $(SUB_OPT) -C $$$$f $1 PROF=$(PROF)/$$$$f VERBOSE=$(VERBOSE); \
							if [ $$$$? != 0 ]; then echo "$$(EchoMsg) abort with errors in $$(PROF)/$$$$f"; exit 1; fi; \
					done
	$(Verb) +$(MAKE) $(SUB_OPT) $1-parallel-recursive VERBOSE=$(VERBOSE)

$1-parallel-recursive::
	$(Verb) +$(MAKE) $(SUB_OPT) $1-local VERBOSE=$(VERBOSE)

$1-local::

$$(foreach dir,$$(PARALLEL_DIRS),$$(eval $$(call do_parallel_subdirs,$1,$$(dir))))
endef

$(foreach target,$(RECURSIVE_TARGETS),$(eval $(call do_recursive_target,$(target))))

tidy:
	$(Echo) "Cleaning temporary files"
	$(Verb) find $(PROJ_OBJ_ROOT) \( -iname "*~" -o -iname "\#*" \) -exec rm -f {} \;

clean-local::
	$(Echo) "Cleaning compilation files"
	$(Verb) rm -Rf $(BUILD_DIR)

confclean: clean
	$(Echo) "Cleaning configuration"
	$(Verb) rm -Rf $(patsubst $(PROJ_OBJ_ROOT)/%,%,$(CONFIG_FILES))
	$(Verb) rm -Rf $(patsubst $(PROJ_OBJ_ROOT)/%,%,$(CONFIG_HEADERS))
	$(Verb) rm -Rf $(PROJ_OBJ_ROOT)/config.status $(PROJ_OBJ_ROOT)/config.log
	$(Verb) rm -Rf $(PROJ_OBJ_ROOT)/autoconf/autom4te.cache $(PROJ_OBJ_ROOT)/autoconf/configure.bak

check::
	$(Echo) "---- building with: "
	$(Echo) "  PROJ_SRC_ROOT: $(PROJ_SRC_ROOT)"
	$(Echo) "  PROJ_OBJ_ROOT: $(PROJ_OBJ_ROOT)"
	$(Echo) "  SHFLAGS: $(SHFLAGS)"
	$(Echo) "  EXEEXT: $(EXEEXT)"
	$(Echo) "  SHLIBEXT: $(SHLIBEXT)"
	$(Echo) "  OPTIMIZED: $(OPTIMIZED)"
	$(Echo) "  DEBUG: $(DEBUG)"
	$(Echo) "  ASSERT: $(ASSERT)"
	$(Echo) "  CONFIG_FILES: $(CONFIG_FILES)"
	$(Echo) "  CONFIG_HEADERS: $(CONFIG_HEADERS)"
	$(Echo) "  BUILD_NAME: $(BUILD_NAME)"
	$(Echo) "  CLANG: $(CLANG)"
	$(Echo) "  CLANGXX: $(CLANGXX)"
	$(Echo) "  LLC: $(LLC)"
	$(Echo) "  LOPT: $(LOPT)"

###############################################################################
#   Build system managment
###############################################################################
SELF=$(PROJ_SRC_ROOT)/Makefile.rules $(PROJ_OBJ_ROOT)/Makefile.config $(PROJ_SRC_CWD)/Makefile

$(PROJ_SRC_ROOT)/configure: $(PROJ_SRC_ROOT)/autoconf/configure.ac
	$(Echo) "Rebootstraping project"
	$(Verb) cd $(PROJ_SRC_ROOT)/autoconf && autoconf -o $@ $< && touch $@
	$(Verb) cd $(PROJ_OBJ_ROOT) && ./config.status --recheck

define define_config_rule
$$(LEVEL)/$1 $$(PROJ_OBJ_ROOT)/$1: $$(PROJ_SRC_ROOT)/$1.in $$(PROJ_SRC_ROOT)/configure
	$(Echo) "Regenerating project files $$1"
	$(Verb) cd $(PROJ_OBJ_ROOT) && ./config.status -q --$2=$1 && touch $$@
endef

$(foreach cur,$(CONFIG_FILES),$(eval $(call define_config_rule,$(cur),file)))
$(foreach cur,$(CONFIG_HEADERS),$(eval $(call define_config_rule,$(cur),header)))


###############################################################################
#   Find sources
###############################################################################
define find-sources
	$(basename $(notdir $(wildcard $(PROJ_SRC_CWD)/*$1)))
endef

ifndef BASE_OBJ_FILES
	BASE_OBJ_FILES=$(call find-sources,.cc)
endif
BC_FILES+=$(addsuffix .bc,$(addprefix $(BUILD_DIR)/,$(BASE_OBJ_FILES)))
OBJ_FILES+=$(addsuffix .o,$(addprefix $(BUILD_DIR)/,$(BASE_OBJ_FILES)	$(basename $(notdir $(wildcard $(PROJ_SRC_CWD)/*.s)))))
DEP_FILES=$(addsuffix .d,$(addprefix $(BUILD_DIR)/,$(BASE_OBJ_FILES)))

check::
	$(Echo) "  BC_FILES: $(BC_FILES)"
	$(Echo) "  DEP_FILES: $(DEP_FILES)"

###############################################################################
#   Module
###############################################################################
ifdef MODULE

GEN_MODULE=$(LIB_DIR)/$(MODULE)

all-local:: $(LIB_DIR)/.dir $(GEN_MODULE).a $(GEN_MODULE).bc

# not used for the moment
ifdef __EXTRACT__

EXTRACT_NAME=$(BUILD_DIR)/$(MODULE)-llvm-functions
TABLE_NAME=$(BUILD_DIR)/$(MODULE).table
STRIP_NAME=$(BUILD_DIR)/$(MODULE).strip

OBJ_FILES+=$(EXTRACT_NAME).o

$(EXTRACT_NAME).cc: $(STRIP_NAME).bc $(TABLE_NAME) $(SELF)
	$(Echo) "Extracting llvm runtime functions into '$(notdir $@)'"
	$(Verb) doit() { \
			echo '#include "llvm/IR/Module.h"';  \
			echo '#include "llvm/IR/Constants.h"';  \
			echo '#include "llvm/IR/Instructions.h"';  \
			echo '#include "j3/j3classloader.h"'; \
			echo 'using namespace llvm;'; \
			set -o pipefail; \
			for f in $(EXTRACT); do \
				mangled=`cat $(TABLE_NAME) | grep -F "$$f" | gawk -F'@' '{ print $$2 }' | tail -n 1`; \
		  	$(LLC) $< -march=cpp -cppgen=function -cppfor="$$mangled" -o - \
					| sed -e "s/makeLLVMFunction/makeLLVMFunction_$(MODULE)_$$mangled/" \
					| sed -e "s/\\x22//"; \
				if [ "$$?" != 0 ]; then \
					echo "Unable to find: $$f" >&2; \
					exit 1; \
				fi; \
			done; \
			for f in $(EXTRACT_TYPE); do \
		  	$(LLC) $< -march=cpp -cppgen=type -cppfor="$$f" -o - \
					| sed -e "s/makeLLVMType/makeLLVMType_$(MODULE)_`echo $$f | sed -e 's/\./_/' | sed -e 's/::/_/'`/" \
					| sed -e "s/\\x22//" \
					; \
			done; \
			echo "void j3::J3InitialClassLoader::makeLLVMFunctions_$(MODULE)() {"; \
			for f in $(EXTRACT); do \
				mangled=`cat $(TABLE_NAME) | grep -F "$$f" | gawk -F'@' '{ print $$2 }' | tail -n 1`; \
				unmangled=`cat $(TABLE_NAME) | grep -F "$$f" | gawk -F'@' '{ print $$1 }' | tail -n 1`; \
				echo "  makeLLVMFunction_$(MODULE)_$$mangled(module());"; \
				echo "  registerCMangling(\"$$mangled\", \"$$unmangled\");"; \
			done; \
			for f in $(EXTRACT_TYPE); do \
				echo "  makeLLVMType_$(MODULE)_`echo $$f | sed -e 's/\./_/' | sed -e 's/::/_/'`(module());"; \
			done; \
			echo "}"; \
		}; doit > $@

$(STRIP_NAME).bc: $(GEN_MODULE).bc
	$(Echo) "Strip debug info from '$(notdir $<)'"
	$(Verb) $(LLOPT) -strip-debug $< -o $@

$(TABLE_NAME): $(GEN_MODULE).bc
	$(Echo) "Demangling '$(notdir $<)' in '$(notdir $@)'"
	$(Verb) $(LLNM) --defined-only $< | tr -s ' ' | $(GAWK) -F' ' '{ print $$2 }' | \
			  tee $(TABLE_NAME).mangled | c++filt -n > $(TABLE_NAME).demangled
	$(Verb) $(GAWK) '{ d=$$0; getline < "'"$(TABLE_NAME).mangled"'"; m=$$0; printf("%s@%s\n", d, m); }' \
				< $(TABLE_NAME).demangled > $@

endif

endif

###############################################################################
#   Tool
###############################################################################
ifdef TOOL
TOOL_OUT=$(BIN_DIR)/$(TOOL)$(EXEEXT)

FINAL_MODULE=$(LIB_DIR)/libjvm
STRIP_MODULE=$(BUILD_DIR)/libjvm
GEN_MODULE=$(BUILD_DIR)/libjvm-no-strip
SONAME=$(FINAL_MODULE)

BC_FILES+=$(addsuffix .bc,$(addprefix $(LIB_DIR)/,$(LIBS))) 
SO_FILES=$(addsuffix .a,$(addprefix $(LIB_DIR)/,$(LIBS))) 
SO_LIBS=$(LLVM_LIBS)

TOOL_ALL=$(BIN_DIR)/.dir $(TOOL_OUT)
TOOL_DEP=$(OBJ_FILES)

ifdef WITH_DYLIB
TOOL_ALL+=$(FINAL_MODULE).bc
TOOL_DEP+=$(SONAME)$(SHLIBEXT)
else
TOOL_DEP+=$(SO_FILES)
TOOL_FLAGS=$(LLVM_LDFLAGS) $(SHFLAGS)
LDFLAGS=$(SO_LIBS)
endif

all-local:: $(TOOL_ALL)

$(TOOL_OUT): $(TOOL_DEP)
	$(Echo) "Linking '$(notdir $@)'"
	$(Verb) $(CLANGXX) $(TOOL_FLAGS) -o $@ -Wl,-rpath,$(LIB_DIR) $(LDFLAGS) $^

$(FINAL_MODULE).bc: $(STRIP_MODULE).bc $(BIN_DIR)/vmkit-extract $(PROJ_SRC_ROOT)/$(EXTRACTOR)
	$(Echo) "Extracting runtime function to '$(notdir $@)'"
	$(Verb) $(BIN_DIR)/vmkit-extract $< $(PROJ_SRC_ROOT)/$(EXTRACTOR) > $@

$(STRIP_MODULE).bc: $(GEN_MODULE).bc
	$(Echo) "Strip debug info from '$(notdir $<)'"
	$(Verb) $(LLOPT) -strip-debug $< -o $@

endif

###############################################################################
#   Library
###############################################################################
ifdef LIBRARY
SONAME=$(LIB_DIR)/$(LIBRARY)
all-local:: $(LIB_DIR)/.dir $(SONAME)$(SHLIBEXT)

SO_FILES=$(OBJ_FILES)

endif

###############################################################################
#   Prepare the code
###############################################################################
ifndef NO_PREPARE_CODE
DO_PREPARE_CODE_LIB=$(LIB_DIR)/vmkit-prepare-code$(SHLIBEXT)
DO_PREPARE_CODE=-load=$(DO_PREPARE_CODE_LIB) -VMKitAdaptLinkage
RAW=-raw

%.bc: %$(RAW).bc $(DO_PREPARE_CODE_LIB)
	$(Echo) "Prepare code for vmkit '$(notdir $@)'"
	$(Verb) $(LLOPT) $(DO_PREPARE_CODE) $(OPTFLAGS) $< -o $@

endif

###############################################################################
#   Compilation
###############################################################################
DEPEND_OPTIONS=-MMD -MP -MF "$(BUILD_DIR)/$$*.d.tmp" -MT "$(BUILD_DIR)/$$*$(RAW).bc" -MT "$(BUILD_DIR)/$$*.d"
DOM=then mv -f "$(BUILD_DIR)/$$*.d.tmp" "$(BUILD_DIR)/$$*.d"; else rm -f "$(BUILD_DIR)/$$*.d.tmp"; exit 1; fi

$(SONAME)$(SHLIBEXT): $(SO_FILES)
	$(Echo) "Linking shared library '$(notdir $@)'" 
	$(Verb) $(CLANGXX) -shared $(LLVM_LDFLAGS) $(SHFLAGS)  -o $@ $(SHALL) $^ $(SHNOALL) $(SO_LIBS)

$(GEN_MODULE).bc: $(BC_FILES)
	$(Echo) "Linking bc module '$(notdir $@)'"
	$(Verb) $(LLLINK) $^ -o $@

$(GEN_MODULE).a: $(OBJ_FILES)
	$(Echo) "Linking module '$(notdir $@)'"
	$(Verb) ar cru $@ $^ && ranlib $@

%.o: %.bc
	$(Echo) "Assembling '$(notdir $<)'"
	$(Verb) $(LLC) $(LLCFLAGS) -filetype=obj -o $@ $<

$(BUILD_DIR)/%.o: %.s $(SELF) $(BUILD_DIR)/.dir
	$(Echo) "Assembling '$(notdir $<)'"
	$(Verb) if $(CLANGXX) $(CXXFLAGS) $(DEPEND_OPTIONS) -c "$<" -o $@; $(DOM)

define define_compile_rule
$(BUILD_DIR)/%$(RAW).bc: $4%$1 $(SELF) $(BUILD_DIR)/.dir
	$(Echo) "Compiling '$$(notdir $$<)'"
	$(Verb) if $2 $3 $(DEPEND_OPTIONS) -emit-llvm -c "$$<" -o $$@; $(DOM)
endef

$(eval $(call define_compile_rule,.cc,$(CLANGXX),$(CXXFLAGS),))
$(eval $(call define_compile_rule,.cc,$(CLANGXX),$(CXXFLAGS),$(BUILD_DIR)/))

%/.dir:
	$(Verb) mkdir -p $(dir $@) && touch $@

ifneq ($(MAKECMDGOALS),tidy)
ifneq ($(MAKECMDGOALS),clean)
ifneq ($(MAKECMDGOALS),confclean)
-include $(DEP_FILES)
endif
endif
endif