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#!/bin/bash

# Slackware build script for nvidia-kernel

# Copyright 2007-2011 Heinz Wiesinger, Amsterdam, The Netherlands
# Copyright 2011-2017 Edward W. Koenig, Vancouver, WA, USA
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ''AS IS'' AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Thanks to Robby Workman for suggestions to improve this script.

# See changelog.txt

cd $(dirname $0) ; CWD=$(pwd)

PRGNAM=nvidia-legacy340-kernel
VERSION=${VERSION:-340.108}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}
PKGTYPE=${PKGTYPE:-tgz}

KERNEL=${KERNEL:-$(uname -r)}
KERNELPATH=${KERNELPATH:-/lib/modules/${KERNEL}/build}

PKGVER=${VERSION}_$(echo $KERNEL | tr - _)

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

if [ "$ARCH" = "i586" ]; then
  TARGET="x86"
  SRCSUFFIX=""
elif [ "$ARCH" = "i686" ]; then
  TARGET="x86"
  SRCSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  TARGET="x86_64"
fi

unset ARCH

SRCNAM=NVIDIA-Linux-$TARGET-${VERSION}

# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PRGNAM-$PKGVER-$TARGET-$BUILD$TAG.$PKGTYPE"
  exit 0
fi

TMP=${TMP:-/tmp/SBo}
PKG=${PKG:-$TMP/package-$PRGNAM}
OUTPUT=${OUTPUT:-/tmp}

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP || exit 1
rm -rf $SRCNAM
sh $CWD/$SRCNAM.run --extract-only || exit 1
cd $SRCNAM || exit 1
chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

for i in $CWD/patches/* ; do patch -p1 < $i ; done

(cd kernel || exit 1
  make SYSSRC=$KERNELPATH module || exit 1
  cd uvm
  sed -i "s|-O2$|-O2 -Wno-error=incompatible-pointer-types|" Makefile
  make SYSSRC=$KERNELPATH module || exit 1
)

mkdir -p $PKG/lib/modules/$KERNEL/kernel/drivers/video
install -m 0664 kernel/nvidia.ko $PKG/lib/modules/$KERNEL/kernel/drivers/video/

# Unified Memory kernel module is incompatible with recent Linux kernels,
# and the GPU hardware generations that the 340.xx legacy driver series is
# intended to support do not support Unified Memory.
if [ -e kernel/uvm/nvidia-uvm.ko ]; then
  install -m 0664 kernel/uvm/nvidia-uvm.ko $PKG/lib/modules/$KERNEL/kernel/drivers/video/
fi

# Make sure the X is specified to automagically load the
# correct driver, since I always forget. You can remove
# this file if you have an equivilent entry in /etc/X11/xorg.d

mkdir -p $PKG/usr/share/X11/xorg.conf.d/
cat $CWD/10-nvidia.conf > $PKG/usr/share/X11/xorg.conf.d/10-nvidia.conf

mkdir -p $PKG/usr/doc/$PRGNAM-$PKGVER
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$PKGVER/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc
sed "s%@KERNEL@%$KERNEL%" $CWD/doinst.sh > $PKG/install/doinst.sh

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$PKGVER-$TARGET-$BUILD$TAG.$PKGTYPE