Rework to build by autoconf/automake and new Debian scripts

Building in local machine:
    $ sh autogen.sh
    $ ./configure
    $ make
    $ sudo make install

Building Debian package:
    $ debuild -uc -us -b

Signed-off-by: Dongjin Kim <tobetter@gmail.com>
Change-Id: I76faa07c1586658d053a3e260ea231a19392f792

gpio/Makefile

@@ -1,95 +0,0 @@
-#
-# Makefile:
-#	The gpio command:
-#	  A swiss-army knige of GPIO shenanigans.
-#	https://projects.drogon.net/wiring-pi
-#
-#	Copyright (c) 2012-2016 Gordon Henderson
-#################################################################################
-# This file is part of wiringPi:
-#	A "wiring" library for the Raspberry Pi
-#
-#    wiringPi is free software: you can redistribute it and/or modify
-#    it under the terms of the GNU Lesser General Public License as published by
-#    the Free Software Foundation, either version 3 of the License, or
-#    (at your option) any later version.
-#
-#    wiringPi 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 Lesser General Public License for more details.
-#
-#    You should have received a copy of the GNU Lesser General Public License
-#    along with wiringPi.  If not, see <http://www.gnu.org/licenses/>.
-#################################################################################
-
-DESTDIR?=/usr
-PREFIX?=/local
-
-ifneq ($V,1)
-Q ?= @
-endif
-
-#DEBUG	= -g -O0
-DEBUG	= -O2
-CC	= gcc
-INCLUDE	= -I$(DESTDIR)$(PREFIX)/include
-CFLAGS	= $(DEBUG) -Wall -Wextra $(INCLUDE) -Winline -pipe
-
-LDFLAGS	= -L$(DESTDIR)$(PREFIX)/lib
-LIBS    = -lwiringPi -lpthread -lrt -lm -lcrypt -lgpiod
-
-# May not need to  alter anything below this line
-###############################################################################
-
-SRC	=	gpio.c readall.c
-
-OBJ	=	$(SRC:.c=.o)
-
-all:		gpio
-
-version.h:	../VERSION
-	$Q echo Need to run newVersion above.
-
-gpio:	$(OBJ)
-	$Q echo [Link]
-	$Q $(CC) -o $@ $(OBJ) $(LDFLAGS) $(LIBS)
-
-.c.o:
-	$Q echo [Compile] $<
-	$Q $(CC) -c $(CFLAGS) $< -o $@
-
-.PHONY:	clean
-clean:
-	$Q echo "[Clean]"
-	$Q rm -f $(OBJ) gpio *~ core tags *.bak
-
-.PHONY:	tags
-tags:	$(SRC)
-	$Q echo [ctags]
-	$Q ctags $(SRC)
-
-.PHONY:	install
-install: gpio
-	$Q echo "[Install]"
-	$Q cp gpio		$(DESTDIR)$(PREFIX)/bin
-ifneq ($(WIRINGPI_SUID),0)
-	$Q chown root.root	$(DESTDIR)$(PREFIX)/bin/gpio
-	$Q chmod 4755		$(DESTDIR)$(PREFIX)/bin/gpio
-endif
-	$Q mkdir -p		$(DESTDIR)$(PREFIX)/share/man/man1
-	$Q cp gpio.1		$(DESTDIR)$(PREFIX)/share/man/man1
-
-.PHONY:	uninstall
-uninstall:
-	$Q echo "[UnInstall]"
-	$Q rm -f $(DESTDIR)$(PREFIX)/bin/gpio
-	$Q rm -f $(DESTDIR)$(PREFIX)/share/man/man1/gpio.1
-
-.PHONY:	depend
-depend:
-	makedepend -Y $(SRC)
-
-# DO NOT DELETE
-
-gpio.o: ../version.h

gpio/Makefile.am

@@ -0,0 +1,14 @@
+sbin_PROGRAMS = gpio
+
+gpio_SOURCES = \
+	gpio.c \
+	readall.c
+
+gpio_CFLAGS = \
+	-I ../wiringPi \
+	@EXTRA_CFLAGS@ \
+	$(LIBCRYPT_CFLAGS)
+
+gpio_LDFLAGS = \
+	-L../wiringPi/.libs -lwiringPi \
+	$(LIBCRYPT_LIBS)