# Copyright 1999-2003 Gentoo Technologies, Inc.
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/sys-apps/i2c/i2c-2.8.0.ebuild,v 1.5 2003/09/08 11:32:47 msterret Exp $

# plasmaroo@plasmaroo.squirrelserver.co.uk, datestamp Tue Aug 12, 11:11 PM

S=${WORKDIR}/${P}
DESCRIPTION="I2C Bus support for 2.4.x kernels"
SRC_URI="http://www2.lm-sensors.nu/~lm78/archive/${P}.tar.gz"
HOMEPAGE="http://www2.lm-sensors.nu/~lm78"

SLOT="0"
KEYWORDS="~x86 ~amd64 ~ppc"
LICENSE="GPL-2"
DEPEND=""

src_compile ()  {

	echo
	einfo "*****************************************************************"
	einfo
	einfo "This ebuild assumes your *current* kernel is >=2.4.9 && < 2.5+ "
	einfo
	einfo "For 2.5+ series kernels, use the support already in the kernel"
	einfo "under 'Character devices' -> 'I2C support'."
	einfo
	einfo "To cross-compile, 'export LINUX=\"/lib/modules/<version>/build\"'"
	einfo "or symlink /usr/src/linux to another kernel."
	einfo
	einfo "*****************************************************************"
	echo

	eerror "*****************************************************************"
	eerror
	eerror "WARNING: This i2c support is not recommended for things such as "
	eerror "WARNING: BTTV"
	eerror
	eerror "*****************************************************************"
	eerror
	eerror "http://www2.lm-sensors.nu/~lm78/cvs/browse.cgi/lm_sensors2/README"
	eerror
	eerror "35 ADDITIONALLY, i2c-2.8.0 is not API compatible to earlier i2c"
	eerror "36 releases due to struct changes; therefore you must NOT ENABLE"
	eerror "37 any other i2c drivers (e.g. bttv) in the kernel."
	eerror "38 Do NOT use lm-sensors 2.8.0 or i2c-2.8.0 if you require bttv."
	eerror
	eerror "Please try out http://www.ensicaen.ismra.fr/~delvare/devel/i2c/"
	eerror "for a kernel patch which will fix this problem. Please note that"
	eerror "nor the lm_sensors team nor the package maintainers will be able"
	eerror "to support you if you encounter problems with I2C when using"
	eerror "other modules with requirements on I2C..."
	eerror
	eerror "*****************************************************************"
	echo
	sleep 10

	if [ "$LINUX" != "" ]; then
		einfo "Cross-compiling using:- $LINUX"
		einfo "Using headers from:- `echo $LINUX/include/linux | sed 's/\/\//\//'`"
		LINUX=`echo $LINUX | sed 's/build\//build/'`
	else
		einfo "You are running:- `uname -r`"
		check_KV || die "Cannot find kernel in /usr/src/linux"
		einfo "Using kernel in /usr/src/linux/:- ${KV}"

		echo ${KV} | grep 2.4. > /dev/null
		if [ $? == 1 ]; then
			eerror "Kernel version in /usr/src/linux is not 2.4.x"
			eerror "Please specify a 2.4.x kernel!"
			die "Incompatible Kernel"
		else
			LINUX='/usr/src/linux'
		fi

		if [ "${KV}" != "`uname -r`" ]; then
			ewarn "WARNING:- kernels do not match!"
		fi
	fi

	echo
	sleep 2

	emake LINUX=$LINUX clean all || \
	die "i2c requires the source of a compatible kernel version installed in /usr/src/linux or the environmental variable \$LINUX and kernel i2c *disabled* or *enabled as a module*"
}

src_install () {

	emake LINUX=$LINUX LINUX_INCLUDE_DIR=/usr/include/linux DESTDIR=${D} PREFIX=/usr MANDIR=/usr/share/man install || die
	dodoc CHANGES INSTALL README

}

pkg_postinst() {
	[ -x /usr/sbin/update-modules ] && /usr/sbin/update-modules

	echo
	einfo "*****************************************************************"
	einfo
	einfo "I2C modules installed ..."
	einfo
	einfo "IMPORTANT ... if you are installing this package you need to"
	einfo "IMPORTANT ... *disable* kernel I2C support OR *modularize it*"
	einfo "IMPORTANT ... if your 2.4.x kernel is patched with such support"
	einfo
	einfo "*****************************************************************"
	echo

}