diff --git a/libraries/isl/README b/libraries/isl/README
new file mode 100644
index 0000000000..342213d403
--- /dev/null
+++ b/libraries/isl/README
@@ -0,0 +1,8 @@
+isl is a library for manipulating sets and relations of integer points 
+bounded by linear constraints. Supported operations on sets include 
+intersection, union, set difference, emptiness check, convex hull, 
+(integer) affine hull, integer projection, computings the lexicographic 
+minimum using parametric integer programming, coalescing and parametric 
+vertex enumeration. It also includes an ILP solver based on generalized 
+basis reduction, transitive closures on maps (which may encode infinite 
+graphs), dependence analysis and bounds on piecewise step-polynomials. 
diff --git a/libraries/isl/isl.SlackBuild b/libraries/isl/isl.SlackBuild
new file mode 100644
index 0000000000..58173fad6d
--- /dev/null
+++ b/libraries/isl/isl.SlackBuild
@@ -0,0 +1,115 @@
+#!/bin/sh
+
+# Slackware build script for isl
+
+# Copyright 2017 Jan F. Chadima <jfch@jagda.eu>
+# 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=isl
+VERSION=${VERSION:-0.18}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i586 ;;
+    arm*) readelf /usr/bin/file -A | egrep -q "Tag_CPU.*[4,5]" && ARCH=arm || ARCH=armv7hl ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+CWD=$(pwd)
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="${SLKCFLAGS:--O2 -march=i586 -mtune=i686}"
+  LIBDIRSUFFIX=""
+  GNUEABI=""
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="${SLKCFLAGS:--O2 -march=i686 -mtune=i686}"
+  LIBDIRSUFFIX=""
+  GNUEABI=""
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="${SLKCFLAGS:--O2 -fPIC}"
+  LIBDIRSUFFIX="64"
+  GNUEABI=""
+elif [ "$ARCH" = "arm" ]; then
+  SLKCFLAGS="${SLKCFLAGS:--O3 -march=armv4t -mtune=cortex-a6 -fPIC}"
+  LIBDIRSUFFIX=""
+  GNUEABI="-gnueabi"
+elif [ "$ARCH" = "armv7hl" ]; then
+  SLKCFLAGS="${SLKCFLAGS:--O3 -march=armv7-a -mtune=cortex-a8 -mfpu=neon-vfpv4 -fPIC}"
+  LIBDIRSUFFIX=""
+  GNUEABI="-gnueabi"
+else
+  SLKCFLAGS="${SLKCFLAGS:--O2}"
+  LIBDIRSUFFIX=""
+  GNUEABI=""
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION
+tar xvf $CWD/$PRGNAM-$VERSION.tar.xz
+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 {} \;
+
+CFLAGS="$SLKCFLAGS" \
+CXXFLAGS="$SLKCFLAGS" \
+./configure \
+  --prefix=/usr \
+  --libdir=/usr/lib$LIBDIRSUFFIX \
+  --sysconfdir=/etc \
+  --localstatedir=/var \
+  --docdir=/usr/doc/$PRGNAM-$VERSION \
+  --build=$ARCH-slackware-linux$GNUEABI
+
+make
+make install DESTDIR=$PKG
+
+# Move gdb extension to its place.
+mkdir -p $PKG/usr/share/gdb/auto-load/usr/lib$LIBDIRSUFFIX
+mv $PKG/usr/lib$LIBDIRSUFFIX/*-gdb.py* \
+  $PKG/usr/share/gdb/auto-load/usr/lib$LIBDIRSUFFIX
+
+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
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a \
+  AUTHORS ChangeLog LICENSE README doc/*.bib doc/*.pdf doc/*.pod doc/*.tex \
+  $PKG/usr/doc/$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
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}
diff --git a/libraries/isl/isl.info b/libraries/isl/isl.info
new file mode 100644
index 0000000000..1784d2ae24
--- /dev/null
+++ b/libraries/isl/isl.info
@@ -0,0 +1,10 @@
+PRGNAM="isl"
+VERSION="0.18"
+HOMEPAGE="http://isl.gforge.inria.fr"
+DOWNLOAD="http://isl.gforge.inria.fr/isl-0.18.tar.xz"
+MD5SUM="5337cd4c29101fe8e8e1b0f5948f91e2"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES=""
+MAINTAINER="Jan F. Chadima"
+EMAIL="jfch@jagda.eu"
diff --git a/libraries/isl/slack-desc b/libraries/isl/slack-desc
new file mode 100644
index 0000000000..8bd67300f0
--- /dev/null
+++ b/libraries/isl/slack-desc
@@ -0,0 +1,19 @@
+# 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------------------------------------------------------|
+isl: isl (Integer point manipulation library)
+isl:
+isl: isl is a library for manipulating sets and relations of integer
+isl: points bounded by linear constraints.
+isl:
+isl: Homepage: http://isl.gforge.inria.fr/
+isl:
+isl:
+isl:
+isl:
+isl: