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#
# 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 tags      create tags for Emacs editor
#   $ make ctags     create ctags for VI editor
#   $ make clean     clean objects and the executable file
#   $ make distclean 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 = @MAKEFILE_CFLAGS@

# The linker options.
MY_LIBS   =

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

# The options used in linking as well as in any direct use of ld.
LDFLAGS   = @MAKEFILE_LDFLAGS@,-T@MAKEFILE_LINKER_SCRIPT@

# The directories in which source files reside.
# If not specified, only the current directory will be serached.
SRCDIRS   =

# The executable file name.
# If not specified, current directory name or `a.out' will be used.
PROGRAM   = main

## 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 pre-processor and compiler options.
# Users can override those variables from the command line.
CFLAGS  =
CXXFLAGS=

# The C program compiler.
CC     = @MAKEFILE_GCC_BINARY@

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

# Un-comment the following line to compile C programs as C++ ones.
#CC     = $(CXX)

# The objcopy command.
OBJCOPY= @MAKEFILE_OBJCOPY_BINARY@

# The objdump command.
OBJDUMP= @MAKEFILE_OBJDUMP_BINARY@

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

ETAGS = etags
ETAGSFLAGS =

CTAGS = ctags
CTAGSFLAGS =

## Stable Section: usually no need to be changed. But you can add more.
##==========================================================================
SHELL   = /bin/sh
EMPTY   =
SPACE   = $(EMPTY) $(EMPTY)
ifeq ($(PROGRAM),)
  CUR_PATH_NAMES = $(subst /,$(SPACE),$(subst $(SPACE),_,$(CURDIR)))
  PROGRAM = $(word $(words $(CUR_PATH_NAMES)),$(CUR_PATH_NAMES))
  ifeq ($(PROGRAM),)
    PROGRAM = a.out
  endif
endif
ifeq ($(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 distclean 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.
#-------------------------------------
$(PROGRAM):$(OBJS)
ifeq ($(SRC_CXX),)              # C program
        $(LINK.c)   $(OBJS) $(MY_LIBS) -o $@
        $(OBJCOPY)  -O srec $(PROGRAM) $(PROGRAM).srec
        $(OBJDUMP)  -DGlrswxz $(PROGRAM) > $(PROGRAM).txt
else                            # C++ program
        $(LINK.cxx) $(OBJS) $(MY_LIBS) -o $@
        $(OBJCOPY)  -O srec $(PROGRAM) $(PROGRAM).srec
        $(OBJDUMP)  -DGlrswxz $(PROGRAM) > $(PROGRAM).txt
endif

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

clean:
        $(RM) $(OBJS) $(PROGRAM).i $(PROGRAM).s $(PROGRAM) $(PROGRAM).srec $(PROGRAM).txt

distclean: clean
        $(RM) $(DEPS) TAGS

# 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 '  tags      create tags for Emacs editor.'
        @echo '  ctags     create ctags for VI editor.'
        @echo '  clean     clean objects and the executable file.'
        @echo '  distclean 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 ##
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