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diff --git a/academic/z3/README b/academic/z3/README
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+++ b/academic/z3/README
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+Z3 is an automated theorem prover and satisfiability modulo theories
+(SMT) solver. Given a formula in first-order logic, it attempts to
+either prove the formula or find a counterexample. Z3 supports
+arithmetic, reasoning about arrays, and several other built-in
+theories. Input problems are written in SMT-LIB format.
+
+This package includes the z3 program as well as the C++ and
+Python APIs. By default the Python 2 version of the API is built;
+if you also want the Python 3 version, run the SlackBuild with
+PYTHON3=yes, like so:
+
+  PYTHON3=yes ./z3.SlackBuild
diff --git a/academic/z3/slack-desc b/academic/z3/slack-desc
new file mode 100644
index 0000000000..c8a8e4c2c2
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+++ b/academic/z3/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------------------------------------------------------|
+z3: z3 (a first-order theorem prover and SMT solver)
+z3:
+z3: Z3 is an automated theorem prover and satisfiability modulo theories
+z3: (SMT) solver. Given a formula in first-order logic, it attempts to
+z3: either prove the formula or find a counterexample. Z3 supports
+z3: arithmetic, reasoning about arrays, and several other built-in
+z3: theories. Input problems are written in SMT-LIB format.
+z3: 
+z3: This package includes the z3 program as well as C++ and Python APIs.
+z3: 
+z3: Homepage: https://github.com/Z3Prover/z3/wiki
diff --git a/academic/z3/z3.SlackBuild b/academic/z3/z3.SlackBuild
new file mode 100644
index 0000000000..bc6dd426f0
--- /dev/null
+++ b/academic/z3/z3.SlackBuild
@@ -0,0 +1,116 @@
+#!/bin/sh
+
+# Slackware build script for z3
+
+# Copyright 2019 Nick Smallbone, Gothenburg, Sweden
+# 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=z3
+VERSION=${VERSION:-4.8.4}
+BUILD=${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
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$PRGNAM-$VERSION
+tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
+cd $PRGNAM-$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" \
+Z3_INSTALL_LIB_DIR=lib${LIBDIRSUFFIX} \
+./configure \
+  --prefix=/usr \
+  --python
+
+cd build
+make
+make install DESTDIR=$PKG
+cd ../doc
+python mk_api_doc.py
+cd ..
+
+if [ z$PYTHON3 = zyes ]; then
+  # Copy the Python bindings to python3.X/site-packages.
+  PYTHON_VERSION=$(python3 -c 'import sys; print("%d.%d" % sys.version_info[:2])')
+  PYLIB=$PKG/usr/lib${LIBDIRSUFFIX}/python${PYTHON_VERSION}/site-packages
+  mkdir -p $PYLIB
+  cp -a build/python/z3 $PYLIB/z3
+  find $PYLIB/z3 -name '*.pyc' -delete
+fi
+
+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 \
+  README.md RELEASE_NOTES LICENSE.txt \
+  $PKG/usr/doc/$PRGNAM-$VERSION
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION/examples
+cp -a \
+  examples/c examples/c++ examples/maxsat examples/python examples/tptp \
+  $PKG/usr/doc/$PRGNAM-$VERSION/examples
+find $PKG/usr/doc/$PRGNAM-$VERSION/examples -name CMakeLists.txt -delete
+cp -a \
+  doc/api/html \
+  $PKG/usr/doc/$PRGNAM-$VERSION/api
+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/academic/z3/z3.info b/academic/z3/z3.info
new file mode 100644
index 0000000000..b193eeb6d8
--- /dev/null
+++ b/academic/z3/z3.info
@@ -0,0 +1,10 @@
+PRGNAM="z3"
+VERSION="4.8.4"
+HOMEPAGE="https://github.com/Z3Prover/z3/wiki"
+DOWNLOAD="https://github.com/Z3Prover/z3/archive/z3-4.8.4.tar.gz"
+MD5SUM="b74bbb04e90c034125fe9e01988add95"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES=""
+MAINTAINER="Nick Smallbone"
+EMAIL="nick@smallbone.se"