#***********************************************************************
# Copyright (C) 2021 Prosource (CLI Systems LLC)
# https://prosource.dev
#
# License:
# THIS SOURCE CODE IS PART OF THE prosource.dev EMBEDDED SYSTEM
# KNOWLEDGE-BASE.  This source code is a Free Solution as defined
# in the Prosource Usage License and is provided under the 
# Creative Commons Attribution 4.0 International (CC BY 4.0) license
# as defined at https://creativecommons.org/licenses/by/4.0/
#
# This source code and all software distributed under the License are
# distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
# EXPRESS OR IMPLIED
#
#**********************************************************************

#==========================================================
# Makefile of project
#==========================================================

#TARGET = ARM

# Basic system
C_COMPILE = 
RFS_ROOT=
DFLAGS =
NAME = test
OPT ?= -O0
GCC_PREFIX = 
EXE = $(NAME).bin

ifeq ($(TARGET),ARM)

	TOOLCHAIN_DIR = $(HOME)/projects/arm-buildroot-linux-gnueabihf_sdk-buildroot

	GCC_PREFIX = arm-buildroot-linux-gnueabihf-
	DFLAGS = -D__ARM__
	
	EXE = $(NAME)_arm.bin
	
	C_COMPILE = $(TOOLCHAIN_DIR)/bin/$(GCC_PREFIX)
	RFS_ROOT = $(TOOLCHAIN_DIR)/arm-buildroot-linux-gnueabihf/sysroot/

endif

# Setup output parameters
PATH_TARGET = 
PATH_OBJ    = bin/
CC = $(C_COMPILE)gcc
CXX = $(C_COMPILE)g++
STRIP = $(C_COMPILE)strip

CFLAGS = -Wall -Wno-unused-function -Wno-unused-variable  -Wno-unused-but-set-variable
CFLAGS += -Wno-switch -ffunction-sections -fdata-sections
#CFLAGS += -Wno-pointer-to-int-cast

ifeq ($(TARGET),ARM)
	CFLAGS += -Wno-format
endif

CFLAGS += -g $(OPT)

#DFLAGS += -DDEBUG

# Directories and files
######################################################
DIRS = ./ 

SRC_FILES = $(shell find . -name '*.c')
CXX_SRC_FILES = $(shell find . -name '*.cpp')
OBJ_FILES = $(subst ./,$(PATH_OBJ),$(patsubst %.c,%.o,$(SRC_FILES)))
CXX_OBJ_FILES = $(subst ./,$(PATH_OBJ),$(patsubst %.cpp,%.o,$(CXX_SRC_FILES)))

# Defaults
######################################################
# Need to include headers for libraries
INCLUDE  = -I . 
INCLUDE += -I $(RFS_ROOT)/usr/include/

INCLUDE += $(foreach dir,$(DIRS),-I $(dir))

# Need to link in libs
LIBS = 
LIBS += -L $(RFS_ROOT)/usr/lib/

# Use libs
LDFLAGS = 
LDFLAGS += -lrt -lm -lpthread

LNFLAGS = -Wl,--gc-sections

# FLTK
######################################################
LDFLAGS += -lfltk

# Sections and rules
######################################################

# Remove SILENT to see the build cmd
.SILENT:

.PHONY: all all-pre all-post
all: all-pre $(EXE) all-post

all-pre:
	echo "-- Building $(EXE) --"
	echo "GCC: $(CC)"
	mkdir -p $(foreach dir,$(DIRS),$(PATH_OBJ)$(dir))
	
all-post:
#	echo "Done..."

$(EXE):  $(OBJ_FILES) $(CXX_OBJ_FILES)
	echo "  LNK $@"
	$(CXX) $(LNFLAGS) -s -o $(PATH_TARGET)$@ $(foreach dir,$(DIRS),$(PATH_OBJ)$(dir)*.o) $(LIBS) $(LDFLAGS)

$(PATH_OBJ)%.o:%.c
	echo "  CC  $@"
	$(CC) $(CFLAGS) $(INCLUDE) $(DFLAGS) -c -o $@ $<

$(PATH_OBJ)%.o:%.cpp
	echo "  CXX $@"
	$(CXX) $(CFLAGS) $(CXXFLAGS) $(INCLUDE) $(DFLAGS) -c -o $@ $<

new: clean all

clean:
	echo "  RM .o"
	rm -rf $(EXE)
	rm -rf $(PATH_OBJ)
	rm -f $(PATH_TARGET)$(OUTLIB)