#-----------------------------------------------------------------------------
# Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# See LICENSE.txt for the text of the license.
#-----------------------------------------------------------------------------
# Common makefile functions for all platforms
#-----------------------------------------------------------------------------

# Make sure that all is the default target
# (The including Makefile still needs to define what 'all' is)

all:

# This Makefile might have been called from various subdirs, trying to find our Makefile.defs
ifeq ($(DEFSBEENHERE),)
    -include Makefile.defs
endif
ifeq ($(DEFSBEENHERE),)
    -include ../Makefile.defs
endif
ifeq ($(DEFSBEENHERE),)
    -include ../../Makefile.defs
endif
ifeq ($(DEFSBEENHERE),)
    $(error Can't find Makefile.defs)
endif

CROSS_CC = $(CROSS)gcc
CROSS_LD = $(CROSS)gcc
CROSS_OBJCOPY = $(CROSS)objcopy

OBJDIR = obj

INCLUDE = -I../include -I../common_arm -I../common_fpga -I../common -I.

# Also search prerequisites in the common directory (for usb.c), the fpga directory (for fpga.bit), and the lz4 directory
VPATH = . ../common_arm ../common ../common/crapto1 ../common/mbedtls ../common/lz4 ../fpga ../armsrc/Standalone ../common/hitag2

INCLUDES = ../include/proxmark3_arm.h ../include/at91sam7s512.h ../include/config_gpio.h ../include/pm3_cmd.h

ARMCFLAGS = -mthumb-interwork -fno-builtin
DEFCFLAGS = -Wall -Werror -Os -pedantic -fstrict-aliasing -pipe

# Some more warnings we want as errors:
DEFCFLAGS += -Wbad-function-cast -Wchar-subscripts -Wundef -Wunused -Wuninitialized -Wpointer-arith -Wformat -Wformat-security -Winit-self -Wmissing-include-dirs -Wnested-externs -Wempty-body -Wignored-qualifiers -Wmissing-field-initializers -Wtype-limits

# Some more warnings we need first to eliminate, so temporarely tolerated:
DEFCFLAGS += -Wshadow -Wno-error=shadow
DEFCFLAGS += -Winline -Wno-error=inline
DEFCFLAGS += -Wmissing-prototypes -Wno-error=missing-prototypes
DEFCFLAGS += -Wmissing-declarations  -Wno-error=missing-declarations
DEFCFLAGS += -Wstrict-prototypes -Wno-error=strict-prototypes
# still vsnprintf etc to sort out...
#DEFCFLAGS += -Wredundant-decls -Wno-error=redundant-decls
#DEFCFLAGS += -Wcast-align -Wno-error=cast-align

# Next ones are activated only if GCCEXTRA=1
EXTRACFLAGS =
EXTRACFLAGS += -Wunused-parameter -Wno-error=unused-parameter
EXTRACFLAGS += -Wswitch-enum -Wno-error=switch-enum
EXTRACFLAGS += -Wsign-compare -Wno-error=sign-compare
EXTRACFLAGS += -Wold-style-definition -Wno-error=old-style-definition
EXTRACFLAGS += -Wconversion -Wno-error=conversion -Wno-error=sign-conversion -Wno-error=float-conversion

# unknown to clang or old gcc:
# First we activate Wextra then we explicitly list those we know about
# Those without -Wno-error are supposed to be completely solved
GCCEXTRACFLAGS = -Wextra
# unknown to arm-none-eabi/4.9.3
GCCEXTRACFLAGS += -Wwrite-strings -Wno-error=discarded-qualifiers

GCCEXTRACFLAGS += -Wold-style-declaration -Wno-error=old-style-declaration
GCCEXTRACFLAGS += -Wimplicit-fallthrough=3 -Wno-error=implicit-fallthrough
GCCEXTRACFLAGS += -Wclobbered
GCCEXTRACFLAGS += -Wcast-function-type
GCCEXTRACFLAGS += -Wmissing-parameter-type
GCCEXTRACFLAGS += -Woverride-init
GCCEXTRACFLAGS += -Wshift-negative-value
GCCEXTRACFLAGS += -Wunused-but-set-parameter
# Not yet enabled in DEFCFLAGS:
GCCEXTRACFLAGS += -Wredundant-decls -Wno-error=redundant-decls
GCCEXTRACFLAGS += -Wcast-align -Wno-error=cast-align

ifeq ($(GCCEXTRA),1)
  DEFCFLAGS += $(GCCEXTRACFLAGS) $(EXTRACFLAGS)
endif
ifeq ($(NOERROR),1)
  DEFCFLAGS += -Wno-error
endif

CROSS_CFLAGS ?= $(DEFCFLAGS)
CROSS_CFLAGS += $(ARMCFLAGS) -c $(INCLUDE) -std=c99 -DON_DEVICE $(APP_CFLAGS)

CROSS_LDFLAGS += -nostartfiles -nodefaultlibs -Wl,-gc-sections -Wl,--build-id=none -n
LIBS = -lgcc

# Flags to generate temporary dependency files
DEPFLAGS = -MT $@ -MMD -MP -MF $(OBJDIR)/$*.Td
# make temporary to final dependency files after successful compilation
POSTCOMPILE = $(MV) -f $(OBJDIR)/$*.Td $(OBJDIR)/$*.d

THUMBOBJ = $(patsubst %.c,$(OBJDIR)/%.o,$(notdir $(THUMBSRC)))
ARMOBJ   = $(patsubst %.c,$(OBJDIR)/%.o,$(notdir $(ARMSRC)))
ASMOBJ   = $(patsubst %.s,$(OBJDIR)/%.o,$(notdir $(ASMSRC)))
VERSIONOBJ = $(patsubst %.c,$(OBJDIR)/%.o,$(notdir $(VERSIONSRC)))

$(THUMBOBJ): $(OBJDIR)/%.o: %.c $(INCLUDES)
	$(info [-] CC $<)
	$(Q)$(CROSS_CC) $(CROSS_CFLAGS) $(DEPFLAGS) -mthumb -o $@ $<
	$(Q)$(POSTCOMPILE)

$(ARMOBJ): $(OBJDIR)/%.o: %.c $(INCLUDES)
	$(info [-] CC $<)
	$(Q)$(CROSS_CC) $(CROSS_CFLAGS) $(DEPFLAGS) -o $@ $<
	$(Q)$(POSTCOMPILE)

$(ASMOBJ): $(OBJDIR)/%.o: %.s
	$(info [-] CC $<)
	$(Q)$(CROSS_CC) $(CROSS_CFLAGS) -o $@ $<

$(VERSIONOBJ): $(OBJDIR)/%.o: %.c $(INCLUDES)
	$(info [-] CC $<)
	$(Q)$(CROSS_CC) $(CROSS_CFLAGS) -mthumb -o $@ $<

# This objcopy call translates physical flash addresses to logical addresses
# without touching start address or RAM addresses (.bss and .data sections)
# See ldscript.common. -- Henryk Plötz <henryk@ploetzli.ch> 2009-08-27
OBJCOPY_TRANSLATIONS = --no-change-warnings \
    --change-addresses -0x100000 --change-start 0 \
    --change-section-address .bss+0 --change-section-address .data-0x100000 \
    --change-section-address .commonarea+0
$(OBJDIR)/%.s19: $(OBJDIR)/%.elf
	$(info [=] GEN $@)
	$(Q)$(CROSS_OBJCOPY) -Osrec --srec-forceS3 --strip-debug $(OBJCOPY_TRANSLATIONS) $^ $@

# easy printing of MAKE VARIABLES
print-%: ; @echo $* = $($*)

# Automatic dependency generation
DEPENDENCY_FILES = $(patsubst %.c,$(OBJDIR)/%.d,$(notdir $(THUMBSRC))) \
	$(patsubst %.c,$(OBJDIR)/%.d,$(notdir $(ARMSRC))) \
	$(patsubst %.s,$(OBJDIR)/%.d,$(notdir $(ASMSRC)))

$(DEPENDENCY_FILES): Makefile ../common_arm/Makefile.common
.PRECIOUS: $(DEPENDENCY_FILES)

-include $(DEPENDENCY_FILES)