############################################################################
# arch/xtensa/src/Makefile
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.  The
# ASF licenses this file to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance with the
# License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
# License for the specific language governing permissions and limitations
# under the License.
#
############################################################################

include $(TOPDIR)/tools/Make.defs
include chip/Make.defs

ifeq ($(CONFIG_ARCH_FAMILY_LX6),y)
ARCH_SUBDIR = lx6
endif

ifeq ($(CONFIG_ARCH_FAMILY_LX7),y)
ARCH_SUBDIR = lx7
endif

ARCH_SRCDIR = $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src

INCLUDES += ${INCDIR_PREFIX}$(ARCH_SRCDIR)$(DELIM)chip
INCLUDES += ${INCDIR_PREFIX}$(ARCH_SRCDIR)$(DELIM)common
INCLUDES += ${INCDIR_PREFIX}$(ARCH_SRCDIR)$(DELIM)$(ARCH_SUBDIR)
INCLUDES += ${INCDIR_PREFIX}$(TOPDIR)$(DELIM)sched

CPPFLAGS += $(INCLUDES)
CFLAGS += $(INCLUDES)
CXXFLAGS += $(INCLUDES)
AFLAGS += $(INCLUDES)

NUTTX = $(call CONVERT_PATH,$(TOPDIR)$(DELIM)nuttx$(EXEEXT))

HEAD_AOBJ = $(HEAD_ASRC:.S=$(OBJEXT))
HEAD_COBJ = $(HEAD_CSRC:.c=$(OBJEXT))
STARTUP_OBJS ?= $(HEAD_AOBJ) $(HEAD_COBJ)

# Flat build or kernel-mode objects

ASRCS = $(CHIP_ASRCS) $(CMN_ASRCS)
AOBJS = $(ASRCS:.S=$(OBJEXT))

CSRCS = $(CHIP_CSRCS) $(CMN_CSRCS)
COBJS = $(CSRCS:.c=$(OBJEXT))

SRCS = $(ASRCS) $(CSRCS)
OBJS = $(AOBJS) $(COBJS)

# User-mode objects

UASRCS = $(CHIP_UASRCS) $(CMN_UASRCS)
UAOBJS = $(UASRCS:.S=$(UOBJEXT))

UCSRCS = $(CHIP_UCSRCS) $(CMN_UCSRCS)
UCOBJS = $(UCSRCS:.c=$(UOBJEXT))

USRCS = $(UASRCS) $(UCSRCS)
UOBJS = $(UAOBJS) $(UCOBJS)

KBIN = libkarch$(LIBEXT)
BIN  = libarch$(LIBEXT)

# Override in Make.defs if linker is not 'ld'

ARCHSCRIPT := $(call CONVERT_PATH,$(ARCHSCRIPT))
LDFLAGS += $(addprefix -T,$(addsuffix .tmp,$(ARCHSCRIPT))) $(EXTRALINKCMDS)

$(foreach lib,$(notdir $(wildcard $(APPDIR)$(DELIM)staging$(DELIM)*$(LIBEXT))), \
  $(foreach elib,$(EXTRA_LIBS), \
    $(if $(filter $(notdir $(elib)),$(lib)), \
      $(eval NAMEFULL_LIBS+=$(elib)), \
      $(if $(filter $(notdir $(elib)),$(patsubst lib%$(LIBEXT),-l%,$(lib))), \
        $(eval NAMESPEC_LIBS+=$(elib)) \
       ) \
     ) \
   ) \
 )

EXTRA_LIBS := $(filter-out $(NAMEFULL_LIBS) $(NAMESPEC_LIBS),$(EXTRA_LIBS))
EXTRA_LIBS += $(wildcard $(APPDIR)$(DELIM)staging$(DELIM)*$(LIBEXT))

ifeq ($(LD),$(CC))
  ifeq ($(CONFIG_STACK_CANARIES),y)
    # filter out ssp(Stack Smashing Protector) related flags:
    #  -fstack-protector
    #  -fstack-protector-all
    #  -fstack-protector-strong
    #  -fstack-protector-explicit
    STRIPCFLAGS = $(filter -fstack-protector%,$(CFLAGS))
  endif
  LDSTARTGROUP ?= -Wl,--start-group
  LDENDGROUP   ?= -Wl,--end-group
  LDFLAGS      := $(addprefix -Xlinker ,$(LDFLAGS))
  LDFLAGS      += $(filter-out $(STRIPCFLAGS),$(CFLAGS))
else
  LDSTARTGROUP ?= --start-group
  LDENDGROUP   ?= --end-group
endif

BOARDMAKE = $(if $(wildcard board$(DELIM)Makefile),y,)

LIBPATHS += -L $(call CONVERT_PATH,$(TOPDIR)$(DELIM)staging)
ifeq ($(BOARDMAKE),y)
  LIBPATHS += -L $(call CONVERT_PATH,$(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board)
endif

LDLIBS = $(patsubst %.a,%,$(patsubst lib%,-l%,$(LINKLIBS)))
ifeq ($(BOARDMAKE),y)
  LDLIBS += -lboard
endif

VPATH += chip
VPATH += common
VPATH += common/espressif
VPATH += $(ARCH_SUBDIR)
VPATH += $(CHIP_DIR)

all: $(STARTUP_OBJS) libarch$(LIBEXT)

.PHONY: board/libboard$(LIBEXT)

$(AOBJS) $(HEAD_AOBJ): %$(OBJEXT): %.S
	$(call ASSEMBLE, $<, $@)

$(COBJS) $(HEAD_COBJ): %$(OBJEXT): %.c
	$(call COMPILE, $<, $@)

$(UAOBJS): %$(UOBJEXT): %.S
	$(call ASSEMBLE, $<, $@)

$(UCOBJS): %$(UOBJEXT): %.c
	$(call COMPILE, $<, $@)

ifeq ($(CONFIG_BUILD_FLAT),y)
$(BIN): $(OBJS)
	$(call ARCHIVE, $@, $(OBJS))
else
$(BIN): $(UOBJS)
	$(call ARCHIVE, $@, $(UOBJS))
endif

$(KBIN): $(OBJS)
	$(call ARCHIVE, $@, $(OBJS))

board/libboard$(LIBEXT):
	$(Q) $(MAKE) -C board libboard$(LIBEXT) EXTRAFLAGS="$(EXTRAFLAGS)"

define LINK_ALLSYMS
	$(Q) $(TOPDIR)/tools/mkallsyms.py $(NUTTX) allsyms.tmp --orderbyname $(CONFIG_SYMTAB_ORDEREDBYNAME)
	$(Q) $(call COMPILE, allsyms.tmp, allsyms$(OBJEXT), -x c)
	$(Q) $(LD) --entry=__start $(LDFLAGS) $(LIBPATHS) $(EXTRA_LIBPATHS) \
		-o $(NUTTX) $(STARTUP_OBJS) allsyms$(OBJEXT) $(EXTRA_OBJS) \
		$(LDSTARTGROUP) $(LDLIBS) $(EXTRA_LIBS) $(LDENDGROUP)
	$(Q) $(call DELFILE, allsyms.tmp allsyms$(OBJEXT))
endef

$(addsuffix .tmp,$(ARCHSCRIPT)): $(ARCHSCRIPT)
	$(call PREPROCESS, $(patsubst %.tmp,%,$@), $@)

nuttx$(EXEEXT): $(STARTUP_OBJS) board/libboard$(LIBEXT) $(addsuffix .tmp,$(ARCHSCRIPT))
	$(Q) echo "LD: nuttx"
ifneq ($(CONFIG_ALLSYMS),y)
	$(Q) $(LD) --entry=__start $(LDFLAGS) $(LIBPATHS) $(EXTRA_LIBPATHS) \
		-o $(NUTTX) $(STARTUP_OBJS) $(EXTRA_OBJS) \
		$(LDSTARTGROUP) $(LDLIBS) $(EXTRA_LIBS) $(LDENDGROUP)
else
	$(Q) # Link and generate default table
	$(Q) $(if $(wildcard $(shell echo $(NUTTX))),,$(call LINK_ALLSYMS,$^))
	$(Q) # Extract all symbols
	$(Q) $(call LINK_ALLSYMS, $^)
	$(Q) # Extract again since the table offset may changed
	$(Q) $(call LINK_ALLSYMS, $^)
endif
ifneq ($(CONFIG_WINDOWS_NATIVE),y)
	$(Q) $(NM) $(NUTTX) | \
	grep -v '\(compiled\)\|\(\$(OBJEXT)$$\)\|\( [aUw] \)\|\(\.\.ng$$\)\|\(LASH[RL]DI\)' | \
	sort > $(TOPDIR)/System.map
endif
	$(Q) $(call DELFILE, $(addsuffix .tmp,$(ARCHSCRIPT)))

# This is part of the top-level export target

export_startup: $(STARTUP_OBJS)
	$(Q) if [ -d "$(EXPORT_DIR)/startup" ]; then \
		cp -f $(STARTUP_OBJS) "$(EXPORT_DIR)/startup"; \
	 else \
		echo "$(EXPORT_DIR)/startup does not exist"; \
		exit 1; \
	 fi

# Dependencies

makedepfile: $(CSRCS:.c=.ddc) $(ASRCS:.S=.dds) $(HEAD_CSRC:.c=.ddc) $(HEAD_ASRC:.S=.dds)
	$(call CATFILE, Make.dep, $^)
	$(call DELFILE, $^)

.depend: Makefile chip/Make.defs $(SRCS) $(TOPDIR)$(DELIM).config
ifeq ($(BOARDMAKE),y)
	$(Q) $(MAKE) -C board depend
endif
	$(Q) $(MAKE) makedepfile DEPPATH="$(patsubst %,--dep-path %,$(subst :, ,$(VPATH)))"
	$(Q) touch $@

depend: .depend

context::

clean:
ifeq ($(BOARDMAKE),y)
	$(Q) $(MAKE) -C board clean
endif
	$(call DELFILE, $(addsuffix .tmp,$(ARCHSCRIPT)))
	$(call DELFILE, $(KBIN))
	$(call DELFILE, $(BIN))
	$(call CLEAN)

distclean:: clean
ifeq ($(BOARDMAKE),y)
	$(Q) $(MAKE) -C board distclean
endif
	$(call DELFILE, Make.dep)
	$(call DELFILE, .depend)

-include Make.dep