games/RetroArch: Added (Reference frontend for the libretro API).

Signed-off-by: David Spencer <idlemoor@slackbuilds.org>

games/RetroArch/README

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+RetroArch is the reference frontend for the libretro API. Popular
+examples of implementations for this API includes videogame system
+emulators and game engines, but also more generalized 3D programs.
+These programs are instantiated as dynamic libraries. We refer to these
+as "libretro cores".
+
+libretro is an API that exposes generic audio/video/input callbacks. A
+frontend for libretro (such as RetroArch) handles video output, audio
+output, input and application lifecycle. A libretro core written in
+portable C or C++ can run seamlessly on many platforms with very
+little/no porting effort.
+
+While RetroArch is the reference frontend for libretro, several other
+projects have used the libretro interface to include support for
+emulators and/or game engines. libretro is completely open and free for
+anyone to use.
+
+RetroArch will require at least one of the libretro cores to play any games.
+
+To build debugging symbols for RetroArch use:
+  DEBUG=1 ./RetroArch.SlackBuild
+
+Some optional dependencies include:
+ffmpeg jack-audio-connection-kit libxkbcommon python3 SDL2 wayland
+
+Note: Wayland support requires mesa to be rebuilt with Wayland support,
+using the following configure parameters.
+
+  --with-egl-platforms=x11,drm,wayland
+
+RetroArch optionally supports using Vulkan instead of opengl, but
+Slackware does not yet provide any Vulkan support, so providing the
+correct build environment is up to you.

games/RetroArch/RetroArch.SlackBuild

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+#!/bin/sh
+
+# Slackware build script for RetroArch
+
+# Copyright 2016 Hunter Sezen California, 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.
+
+PRGNAM=RetroArch
+VERSION=${VERSION:-1.3.6}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i586 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+CWD=$(pwd)
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
+fi
+
+DEBUG=${DEBUG:-0}
+if [ "${DEBUG}" = "1" ]; then
+  SLKCFLAGS=$(echo $SLKCFLAGS | sed 's/-O2/-O0 -g/')
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION
+tar xvf $CWD/$PRGNAM-$VERSION.tar.gz || tar xvf $CWD/v$VERSION.tar.gz
+cd $PRGNAM-$VERSION
+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 {} \;
+
+# Needed for python3 in the 14.1 SBo branch.
+if ! pkg-config --exists python3 && pkg-config --exists python-3.5; then
+  sed -i 's/python3/python-3.5/' qb/config.libs.sh
+fi
+
+# Set the config file default directories to be consistent with the installation.
+sed -e "s|# libretro_directory =|libretro_directory = /usr/lib${LIBDIRSUFFIX}/libretro|" \
+    -e "s|# libretro_info_path =|libretro_info_path = /usr/lib${LIBDIRSUFFIX}/libretro/info|" \
+    -e "s|# audio_filter_dir =|audio_filter_dir = /usr/lib${LIBDIRSUFFIX}/retroarch/filters/audio|" \
+    -e "s|# video_filter_dir =|video_filter_dir = /usr/lib${LIBDIRSUFFIX}/retroarch/filters/video|" \
+    -i retroarch.cfg
+
+CFLAGS="$SLKCFLAGS" \
+CXXFLAGS="$SLKCFLAGS" \
+./configure --prefix=/usr \
+  --with-man_dir=/usr/man
+
+make GL_DEBUG=$DEBUG VULKAN_DEBUG=$DEBUG
+make -C audio/audio_filters
+make -C gfx/video_filters
+make install DESTDIR=$PKG
+
+install -dm0755 $PKG/usr/lib${LIBDIRSUFFIX}/retroarch/filters/audio
+install -dm0755 $PKG/usr/lib${LIBDIRSUFFIX}/retroarch/filters/video
+install -m0644 audio/audio_filters/*.dsp $PKG/usr/lib${LIBDIRSUFFIX}/retroarch/filters/audio
+install -m0644 audio/audio_filters/*.so $PKG/usr/lib${LIBDIRSUFFIX}/retroarch/filters/audio
+install -m0644 gfx/video_filters/*.filt $PKG/usr/lib${LIBDIRSUFFIX}/retroarch/filters/video
+install -m0644 gfx/video_filters/*.so $PKG/usr/lib${LIBDIRSUFFIX}/retroarch/filters/video
+
+mv $PKG/etc/retroarch.cfg $PKG/etc/retroarch.cfg.new
+
+if [ "${DEBUG}" = "0" ]; then
+  find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
+    | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+fi
+
+find $PKG/usr/man -type f -exec gzip -9 {} \;
+for i in $( find $PKG/usr/man -type l ) ; do ln -s $( readlink $i ).gz $i.gz ; rm $i ; done
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a CONTRIBUTING.md COPYING README* $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+cat $CWD/doinst.sh > $PKG/install/doinst.sh
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}

games/RetroArch/RetroArch.info

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+PRGNAM="RetroArch"
+VERSION="1.3.6"
+HOMEPAGE="http://www.libretro.com/"
+DOWNLOAD="https://github.com/libretro/RetroArch/archive/v1.3.6.tar.gz"
+MD5SUM="b2e8518382dcff857b91c154fb6ac279"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES=""
+MAINTAINER="Hunter Sezen"
+EMAIL="ovariegata@yahoo.com"

games/RetroArch/doinst.sh

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+config() {
+  NEW="$1"
+  OLD="$(dirname $NEW)/$(basename $NEW .new)"
+  # If there's no config file by that name, mv it over:
+  if [ ! -r $OLD ]; then
+    mv $NEW $OLD
+  elif [ "$(cat $OLD | md5sum)" = "$(cat $NEW | md5sum)" ]; then
+    # toss the redundant copy
+    rm $NEW
+  fi
+  # Otherwise, we leave the .new copy for the admin to consider...
+}
+
+config etc/retroarch.cfg.new
+
+if [ -x /usr/bin/update-desktop-database ]; then
+  /usr/bin/update-desktop-database -q usr/share/applications >/dev/null 2>&1
+fi

games/RetroArch/slack-desc

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+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.
+# Line up the first '|' above the ':' following the base package name, and
+# the '|' on the right side marks the last column you can put a character in.
+# You must make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':' except on otherwise blank lines.
+
+         |-----handy-ruler------------------------------------------------------|
+RetroArch: RetroArch (Reference frontend for the libretro API)
+RetroArch:
+RetroArch: RetroArch is the reference frontend for the libretro API. Popular
+RetroArch: examples of implementations for this API includes videogame system
+RetroArch: emulators and game engines, but also more generalized 3D programs.
+RetroArch: These programs are instantiated as dynamic libraries. We refer to
+RetroArch: these as "libretro cores".
+RetroArch:
+RetroArch: Homepage: http://www.libretro.com/
+RetroArch:
+RetroArch: