#### PROJECT SETTINGS ####
# The name of the executable to be created
BIN_NAME := hello
# Compiler used
CXX ?= g++
# Extension of source files used in the project
SRC_EXT = cpp
# Path to the source directory, relative to the makefile
SRC_PATH = .
# Space-separated pkg-config libraries used by this project
LIBS =
# General compiler flags
COMPILE_FLAGS = -std=c++11 -Wall -Wextra -g
# Additional release-specific flags
RCOMPILE_FLAGS = -D NDEBUG
# Additional debug-specific flags
DCOMPILE_FLAGS = -D DEBUG
# Add additional include paths
INCLUDES = -I $(SRC_PATH)
# General linker settings
LINK_FLAGS =
# Additional release-specific linker settings
RLINK_FLAGS =
# Additional debug-specific linker settings
DLINK_FLAGS =
# Destination directory, like a jail or mounted system
DESTDIR = /
# Install path (bin/ is appended automatically)
INSTALL_PREFIX = usr/local
#### END PROJECT SETTINGS ####

# Optionally you may move the section above to a separate config.mk file, and
# uncomment the line below
# include config.mk

# Generally should not need to edit below this line

# Obtains the OS type, either 'Darwin' (OS X) or 'Linux'
UNAME_S:=$(shell uname -s)

# Function used to check variables. Use on the command line:
# make print-VARNAME
# Useful for debugging and adding features
print-%: ; @echo $*=$($*)

# Shell used in this makefile
# bash is used for 'echo -en'
SHELL = /bin/bash
# Clear built-in rules
.SUFFIXES:
# Programs for installation
INSTALL = install
INSTALL_PROGRAM = $(INSTALL)
INSTALL_DATA = $(INSTALL) -m 644

# Append pkg-config specific libraries if need be
ifneq ($(LIBS),)
	COMPILE_FLAGS += $(shell pkg-config --cflags $(LIBS))
	LINK_FLAGS += $(shell pkg-config --libs $(LIBS))
endif

# Verbose option, to output compile and link commands
export V := false
export CMD_PREFIX := @
ifeq ($(V),true)
	CMD_PREFIX :=
endif

# Combine compiler and linker flags
release: export CXXFLAGS := $(CXXFLAGS) $(COMPILE_FLAGS) $(RCOMPILE_FLAGS)
release: export LDFLAGS := $(LDFLAGS) $(LINK_FLAGS) $(RLINK_FLAGS)
debug: export CXXFLAGS := $(CXXFLAGS) $(COMPILE_FLAGS) $(DCOMPILE_FLAGS)
debug: export LDFLAGS := $(LDFLAGS) $(LINK_FLAGS) $(DLINK_FLAGS)

# Build and output paths
release: export BUILD_PATH := build/release
release: export BIN_PATH := bin/release
debug: export BUILD_PATH := build/debug
debug: export BIN_PATH := bin/debug
install: export BIN_PATH := bin/release

# Find all source files in the source directory, sorted by most
# recently modified
ifeq ($(UNAME_S),Darwin)
	SOURCES = $(shell find $(SRC_PATH) -name '*.$(SRC_EXT)' | sort -k 1nr | cut -f2-)
else
	SOURCES = $(shell find $(SRC_PATH) -name '*.$(SRC_EXT)' -printf '%T@\t%p\n' \
						| sort -k 1nr | cut -f2-)
endif

# fallback in case the above fails
rwildcard = $(foreach d, $(wildcard $1*), $(call rwildcard,$d/,$2) \
						$(filter $(subst *,%,$2), $d))
ifeq ($(SOURCES),)
	SOURCES := $(call rwildcard, $(SRC_PATH), *.$(SRC_EXT))
endif

# Set the object file names, with the source directory stripped
# from the path, and the build path prepended in its place
OBJECTS = $(SOURCES:$(SRC_PATH)/%.$(SRC_EXT)=$(BUILD_PATH)/%.o)
# Set the dependency files that will be used to add header dependencies
DEPS = $(OBJECTS:.o=.d)

# Macros for timing compilation
ifeq ($(UNAME_S),Darwin)
	CUR_TIME = awk 'BEGIN{srand(); print srand()}'
	TIME_FILE = $(dir $@).$(notdir $@)_time
	START_TIME = $(CUR_TIME) > $(TIME_FILE)
	END_TIME = read st < $(TIME_FILE) ; \
		$(RM) $(TIME_FILE) ; \
		st=$$((`$(CUR_TIME)` - $$st)) ; \
		echo $$st
else
	TIME_FILE = $(dir $@).$(notdir $@)_time
	START_TIME = date '+%s' > $(TIME_FILE)
	END_TIME = read st < $(TIME_FILE) ; \
		$(RM) $(TIME_FILE) ; \
		st=$$((`date '+%s'` - $$st - 86400)) ; \
		echo `date -u -d @$$st '+%H:%M:%S'`
endif

# Version macros
# Comment/remove this section to remove versioning
USE_VERSION := false
# If this isn't a git repo or the repo has no tags, git describe will return non-zero
ifeq ($(shell git describe > /dev/null 2>&1 ; echo $$?), 0)
	USE_VERSION := true
	VERSION := $(shell git describe --tags --long --dirty --always | \
		sed 's/v\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\)-\?.*-\([0-9]*\)-\(.*\)/\1 \2 \3 \4 \5/g')
	VERSION_MAJOR := $(word 1, $(VERSION))
	VERSION_MINOR := $(word 2, $(VERSION))
	VERSION_PATCH := $(word 3, $(VERSION))
	VERSION_REVISION := $(word 4, $(VERSION))
	VERSION_HASH := $(word 5, $(VERSION))
	VERSION_STRING := \
		"$(VERSION_MAJOR).$(VERSION_MINOR).$(VERSION_PATCH).$(VERSION_REVISION)-$(VERSION_HASH)"
	override CXXFLAGS := $(CXXFLAGS) \
		-D VERSION_MAJOR=$(VERSION_MAJOR) \
		-D VERSION_MINOR=$(VERSION_MINOR) \
		-D VERSION_PATCH=$(VERSION_PATCH) \
		-D VERSION_REVISION=$(VERSION_REVISION) \
		-D VERSION_HASH=\"$(VERSION_HASH)\"
endif

# Standard, non-optimized release build
.PHONY: release
release: dirs
ifeq ($(USE_VERSION), true)
	@echo "Beginning release build v$(VERSION_STRING)"
else
	@echo "Beginning release build"
endif
	@$(START_TIME)
	@$(MAKE) all --no-print-directory
	@echo -n "Total build time: "
	@$(END_TIME)

# Debug build for gdb debugging
.PHONY: debug
debug: dirs
ifeq ($(USE_VERSION), true)
	@echo "Beginning debug build v$(VERSION_STRING)"
else
	@echo "Beginning debug build"
endif
	@$(START_TIME)
	@$(MAKE) all --no-print-directory
	@echo -n "Total build time: "
	@$(END_TIME)

# Create the directories used in the build
.PHONY: dirs
dirs:
	@echo "Creating directories"
	@mkdir -p $(dir $(OBJECTS))
	@mkdir -p $(BIN_PATH)

# Installs to the set path
.PHONY: install
install:
	@echo "Installing to $(DESTDIR)$(INSTALL_PREFIX)/bin"
	@$(INSTALL_PROGRAM) $(BIN_PATH)/$(BIN_NAME) $(DESTDIR)$(INSTALL_PREFIX)/bin

# Uninstalls the program
.PHONY: uninstall
uninstall:
	@echo "Removing $(DESTDIR)$(INSTALL_PREFIX)/bin/$(BIN_NAME)"
	@$(RM) $(DESTDIR)$(INSTALL_PREFIX)/bin/$(BIN_NAME)

# Removes all build files
.PHONY: clean
clean:
	@echo "Deleting $(BIN_NAME) symlink"
	@$(RM) $(BIN_NAME)
	@echo "Deleting directories"
	@$(RM) -r build
	@$(RM) -r bin

# Main rule, checks the executable and symlinks to the output
all: $(BIN_PATH)/$(BIN_NAME)
	@echo "Making symlink: $(BIN_NAME) -> $<"
	@$(RM) $(BIN_NAME)
	@ln -s $(BIN_PATH)/$(BIN_NAME) $(BIN_NAME)

# Link the executable
$(BIN_PATH)/$(BIN_NAME): $(OBJECTS)
	@echo "Linking: $@"
	@$(START_TIME)
	$(CMD_PREFIX)$(CXX) $(OBJECTS) $(LDFLAGS) -o $@
	@echo -en "\t Link time: "
	@$(END_TIME)

# Add dependency files, if they exist
-include $(DEPS)

# Source file rules
# After the first compilation they will be joined with the rules from the
# dependency files to provide header dependencies
$(BUILD_PATH)/%.o: $(SRC_PATH)/%.$(SRC_EXT)
	@echo "Compiling: $< -> $@"
	@$(START_TIME)
	$(CMD_PREFIX)$(CXX) $(CXXFLAGS) $(INCLUDES) -MP -MMD -c $< -o $@
	@echo -en "\t Compile time: "
	@$(END_TIME)

#############################################################################
#
# Generic Makefile for C/C++ Program
#
# License: GPL (General Public License)
# Author:  whyglinux <whyglinux AT gmail DOT com>
# Date:    2006/03/04 (version 0.1)
#          2007/03/24 (version 0.2)
#          2007/04/09 (version 0.3)
#          2007/06/26 (version 0.4)
#          2008/04/05 (version 0.5)
#
# Description:
# ------------
# This is an easily customizable makefile template. The purpose is to
# provide an instant building environment for C/C++ programs.
#
# It searches all the C/C++ source files in the specified directories,
# makes dependencies, compiles and links to form an executable.
#
# Besides its default ability to build C/C++ programs which use only
# standard C/C++ libraries, you can customize the Makefile to build
# those using other libraries. Once done, without any changes you can
# then build programs using the same or less libraries, even if source
# files are renamed, added or removed. Therefore, it is particularly
# convenient to use it to build codes for experimental or study use.
#
# GNU make is expected to use the Makefile. Other versions of makes
# may or may not work.
#
# Usage:
# ------
# 1. Copy the Makefile to your program directory.
# 2. Customize in the "Customizable Section" only if necessary:
#    * to use non-standard C/C++ libraries, set pre-processor or compiler
#      options to <MY_CFLAGS> and linker ones to <MY_LIBS>
#      (See Makefile.gtk+-2.0 for an example)
#    * to search sources in more directories, set to <SRCDIRS>
#    * to specify your favorite program name, set to <PROGRAM>
# 3. Type make to start building your program.
#
# Make Target:
# ------------
# The Makefile provides the following targets to make:
#   $ make           compile and link
#   $ make NODEP=yes compile and link without generating dependencies
#   $ make objs      compile only (no linking)
#   $ make ctags     create ctags for VI editor
#   $ make clean 	 clean objects, the executable and dependencies
#   $ make help      get the usage of the makefile
#
#===========================================================================

## Customizable Section: adapt those variables to suit your program.
##==========================================================================

# The pre-processor and compiler options.
MY_CFLAGS = `pkg-config --cflags opencv boost` -I$(SRCROOT)

# The linker options.
MY_LIBS   = `pkg-config --libs opencv boost`

# The pre-processor options used by the cpp (man cpp for more).
CPPFLAGS  = -Wall
CFLAGS  = -g
CXXFLAGS= -g

# The root of the project.
SRCROOT   = .
SRCDIR    = 
RECURSION = 1

# The executable file name.
# If not specified, current directory name or `demo.out' will be used.
PROGRAM   = Main Main2 Subtitle/aa/bb/Main3

## Implicit Section: change the following only when necessary.
##==========================================================================

# The source file types (headers excluded).
# .c indicates C source files, and others C++ ones.
SRCEXTS = .c .C .cc .cpp .CPP .c++ .cxx .cp

# The header file types.
HDREXTS = .h .H .hh .hpp .HPP .h++ .hxx .hp

# The C++ program compiler.
CXX    = g++

# The C program compiler.
CC     = gcc

# The command used to delete file.
RM     = rm -f

CTAGS = ctags
CTAGSFLAGS =

# The directories in which source files reside.
SRCROOT := $(foreach d,$(SRCROOT),$(d:/=))
SRCDIRS := $(strip $(SRCROOT) $(SRCDIR))
SRCDIRS := $(foreach d,$(SRCDIRS),$(d:/=))
ifeq ($(RECURSION), 1)
SRCDIRS := $(shell find $(SRCDIRS) -type d | grep \\.git -v)
endif
SRCDIRS := $(sort $(SRCDIRS))
RMOBJS  := $(addsuffix /*.o, $(SRCDIRS))
RMDEPS  := $(RMOBJS:.o=.d)

# The options used in linking as well as in any direct use of ld.
LDFLAGS   =

## Stable Section: usually no need to be changed. But you can add more.
##==========================================================================
SHELL   = /bin/bash
EMPTY   =
SPACE   = $(EMPTY) $(EMPTY)
ifeq ($(PROGRAM),)
  CUR_PATH_NAMES = $(subst /,$(SPACE),$(subst $(SPACE),_,$(CURDIR)))
  PROGRAM = $(word $(words $(CUR_PATH_NAMES)),$(CUR_PATH_NAMES))
  ifeq ($(PROGRAM),)
    PROGRAM = demo.out
  endif
endif
ifeq ($(SRCDIRS),)
  SRCDIRS = .
endif
SOURCES = $(foreach d,$(SRCDIRS),$(wildcard $(addprefix $(d)/*,$(SRCEXTS))))
HEADERS = $(foreach d,$(SRCDIRS),$(wildcard $(addprefix $(d)/*,$(HDREXTS))))
SRC_CXX = $(filter-out %.c,$(SOURCES))
OBJS    = $(addsuffix .o, $(basename $(SOURCES)))
DEPS    = $(OBJS:.o=.d)

## Define some useful variables.
DEP_OPT = $(shell if `$(CC) --version | grep "gcc" >/dev/null`; then \
                  echo "-MM -MP"; else echo "-M"; fi )
DEPEND      = $(CC)  $(DEP_OPT)  $(MY_CFLAGS) $(CFLAGS) $(CPPFLAGS)
DEPEND.d    = $(subst -g ,,$(DEPEND))
COMPILE.c   = $(CC)  $(MY_CFLAGS) $(CFLAGS)   $(CPPFLAGS) -c
COMPILE.cxx = $(CXX) $(MY_CFLAGS) $(CXXFLAGS) $(CPPFLAGS) -c
LINK.c      = $(CC)  $(MY_CFLAGS) $(CFLAGS)   $(CPPFLAGS) $(LDFLAGS)
LINK.cxx    = $(CXX) $(MY_CFLAGS) $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS)

.PHONY: all objs tags ctags clean help show

# Delete the default suffixes
.SUFFIXES:

all: $(PROGRAM)

# Rules for creating dependency files (.d).
#------------------------------------------

%.d:%.c
	@echo -n $(dir $<) > $@
	$(DEPEND.d) $< >> $@

%.d:%.C
	@echo -n $(dir $<) > $@
	$(DEPEND.d) $< >> $@

%.d:%.cc
	@echo -n $(dir $<) > $@
	$(DEPEND.d) $< >> $@

%.d:%.cpp
	@echo -n $(dir $<) > $@
	$(DEPEND.d) $< >> $@

%.d:%.CPP
	@echo -n $(dir $<) > $@
	$(DEPEND.d) $< >> $@

%.d:%.c++
	@echo -n $(dir $<) > $@
	$(DEPEND.d) $< >> $@

%.d:%.cp
	@echo -n $(dir $<) > $@
	$(DEPEND.d) $< >> $@

%.d:%.cxx
	@echo -n $(dir $<) > $@
	$(DEPEND.d) $< >> $@

# Rules for generating object files (.o).
#----------------------------------------
objs:$(OBJS)

%.o:%.c
	$(COMPILE.c) $< -o $@

%.o:%.C
	$(COMPILE.cxx) $< -o $@

%.o:%.cc
	$(COMPILE.cxx) $< -o $@

%.o:%.cpp
	$(COMPILE.cxx) $< -o $@

%.o:%.CPP
	$(COMPILE.cxx) $< -o $@

%.o:%.c++
	$(COMPILE.cxx) $< -o $@

%.o:%.cp
	$(COMPILE.cxx) $< -o $@

%.o:%.cxx
	$(COMPILE.cxx) $< -o $@

# Rules for generating the tags.
#-------------------------------------
tags: $(HEADERS) $(SOURCES)
	$(ETAGS) $(ETAGSFLAGS) $(HEADERS) $(SOURCES)

ctags: $(HEADERS) $(SOURCES)
	$(CTAGS) $(CTAGSFLAGS) $(HEADERS) $(SOURCES)

# Rules for generating the executable.
#-------------------------------------
COBJS = $(filter-out $(foreach d,$(PROGRAM), \
  $(addprefix $(SRCROOT)/,$(d).o)), $(OBJS))
$(PROGRAM):$(OBJS)
ifeq ($(SRC_CXX),)              # C program
	$(LINK.c)   $(COBJS) $(SRCROOT)/$@.o $(MY_LIBS) -o $@
	@echo Type $(SRCROOT)/$@ to execute the program.
else                            # C++ program
	$(LINK.cxx) $(COBJS) $(SRCROOT)/$@.o $(MY_LIBS) -o $@
	@echo Type $(SRCROOT)/$@ to execute the program.
endif

ifndef NODEP
ifneq ($(DEPS),)
  sinclude $(DEPS)
endif
endif

clean:
	$(RM) $(RMDEPS) $(RMOBJS)
	$(RM) $(PROGRAM) $(foreach d,$(PROGRAM),$(addprefix $(d),.exe))

# Show help.
help:
	@echo 'Generic Makefile for C/C++ Programs (gcmakefile) version 0.5'
	@echo 'Copyright (C) 2007, 2008 whyglinux <whyglinux@hotmail.com>'
	@echo
	@echo 'Usage: make [TARGET]'
	@echo 'TARGETS:'
	@echo '  all       (=make) compile and link.'
	@echo '  NODEP=yes make without generating dependencies.'
	@echo '  objs      compile only (no linking).'
	@echo '  ctags     create ctags for VI editor.'
	@echo '  clean 	   clean objects, the executable and dependencies.'
	@echo '  show      show variables (for debug use only).'
	@echo '  help      print this message.'
	@echo
	@echo 'Report bugs to <whyglinux AT gmail DOT com>.'

# Show variables (for debug use only.)
show:
	@echo 'PROGRAM     :' $(PROGRAM)
	@echo 'SRCDIRS     :' $(SRCDIRS)
	@echo 'HEADERS     :' $(HEADERS)
	@echo 'SOURCES     :' $(SOURCES)
	@echo 'SRC_CXX     :' $(SRC_CXX)
	@echo 'OBJS        :' $(OBJS)
	@echo 'DEPS        :' $(DEPS)
	@echo 'DEPEND      :' $(DEPEND)
	@echo 'COMPILE.c   :' $(COMPILE.c)
	@echo 'COMPILE.cxx :' $(COMPILE.cxx)
	@echo 'LINK.c      :' $(LINK.c)
	@echo 'LINK.cxx    :' $(LINK.cxx)

## End of the Makefile ##  Suggestions are welcome  ## All rights reserved ##
#############################################################################