Introduce a proper Debian source package build system

It's not perfect - there is no symbol versioning, and I have had to
make some (perhaps false) assumptions about library ABI stability, but
it does produce something vaguely resembling what would be expected
from a library package found in Debian, and it does so using the
standard Debian source format.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

debian/.gitignore

@@ -0,0 +1,9 @@
+*.debhelper.log
+*.substvars
+tmp
+wiringpi
+libwiringpi2
+libwiringpi-dev
+files
+*.postinst.debhelper
+*.postrm.debhelper

debian/changelog

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+wiringpi (2.26~iwj) rpi-unstable; urgency=low
+
+  * Initial version with real Debian source package build.
+
+ -- Ian Jackson <ijackson@chiark.greenend.org.uk>  Sat, 12 Sep 2015 18:31:35 +0100
+

debian/compat

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+8

debian/control

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+Source: wiringpi
+Section: electronics
+Priority: optional
+Maintainer: Ian Jackson <ijackson@chiark.greenend.org.uk>
+Standards-Version: 3.8.0
+Homepage: http://wiringpi.com/
+Build-Depends: debhelper (>= 8)
+
+Package: libwiringpi2
+Section: libs
+Architecture: armhf
+Depends: ${shlibs:Depends}, ${misc:Depends}
+Description: GPIO librariees for Raspberry Pi (runtime).
+ Runtime for the popular wiringPi library.
+
+Package: wiringpi
+Architecture: armhf
+Depends: ${shlibs:Depends}, ${misc:Depends}
+Description: gpio utility for Raspberry Pi
+ The wiringPi gpio command line utility, for GPIO access on a
+ Raspberry Pi from the command line.
+
+Package: libwiringpi-dev
+Architecture: armhf
+Depends: libwiringpi2 (= ${binary:Version}), libc6-dev, ${misc:Depends}
+Suggests: wiringpi
+Description: GPIO development library for Raspberry Pi
+ Development libraries to allow GPIO access on a Raspberry Pi from C
+ and C++ programs.

debian/copyright

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+wiringPi is Copyright (C) 2012-2015 Gordon Henderson.
+
+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.
+
+On all Debian and Raspbian systems, a copy of the GNU Lesser General
+Public License version 3 can be found in
+`/usr/share/common-licenses/LGPL-3'.

debian/libwiringpi-dev.dirs

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+usr/lib
+usr/include

debian/libwiringpi-dev.install

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+debian/tmp/usr/include
+debian/tmp/usr/lib/*.so
+examples		usr/share/doc/libwiringpi-dev

debian/libwiringpi2.install

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+debian/tmp/usr/lib/lib*.so.*

debian/libwiringpi2.shlibs

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+libwiringPi 2 libwiringpi2
+libwiringPiDev 2 libwiringpi2

debian/rules

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+#!/usr/bin/make -f
+
+.PHONY: build
+
+VERSION:=$(shell cat VERSION)
+export VERSION
+
+soname:=$(shell echo $${VERSION%%.*})
+WIRINGPI_SONAME_SUFFIX:=.$(soname)
+export soname
+export WIRINGPI_SONAME_SUFFIX
+
+build:
+	dh $@
+
+override_dh_auto_configure:
+
+override_dh_prep:
+	dh_prep -Xdebian/tmp
+
+dirs:
+	dh_installdirs -A
+	mkdir debian/tmp
+	set -e; for p in `dh_listpackages`; do \
+		(cd debian/$$p; find -type d) | \
+		(cd debian/tmp; xargs mkdir -p) \
+	done
+
+override_dh_clean:
+	dh_clean
+	WIRINGPI_SUDO= bash -xe ./build clean
+
+override_dh_auto_build: dirs
+	V=1 LDCONFIG=: WIRINGPI_SUDO= WIRINGPI_SUID=0 \
+	    DESTDIR=`pwd`/debian/tmp/usr \
+	    PREFIX= WIRINGPI_SUDO= \
+	    bash -xe ./build
+
+override_dh_auto_install:
+	dh_install
+	set -ex; for l in libwiringPi libwiringPiDev; do \
+		ln -sf $$l.so.$${VERSION} \
+			debian/libwiringpi$$soname/usr/lib/$$l.so.$$soname; \
+		ln -sf $$l.so.$${VERSION} \
+			debian/libwiringpi-dev/usr/lib/$$l.so; \
+	done
+
+%:
+	dh $@

debian/wiringpi.dirs

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+usr/bin

debian/wiringpi.install

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+debian/tmp/usr/bin
+debian/tmp/usr/man	usr/share
+README.TXT		usr/share/doc/wiringpi
+People			usr/share/doc/wiringpi