diff --git a/office/LibreOffice/LibreOffice.SlackBuild b/office/LibreOffice/LibreOffice.SlackBuild
index dd02a3218f..ed9db05284 100644
--- a/office/LibreOffice/LibreOffice.SlackBuild
+++ b/office/LibreOffice/LibreOffice.SlackBuild
@@ -26,7 +26,7 @@
 
 PRGNAM=LibreOffice
 SRCNAM=libreoffice
-VERSION=${VERSION:-6.1.0.3}
+VERSION=${VERSION:-6.1.1.2}
 SHORT_VERSION=${VERSION%.*.*}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
@@ -81,12 +81,7 @@ find -L . \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
   -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
 
-# Options
-avahi=""             ; [ "${AVAHI:-no}" != "no" ]      && avahi="--enable-avahi"
-vlc=""               ; [ "${VLC:-no}" != "no" ]        && vlc="--enable-vlc"
-kde4="--enable-kde4" ; [ "${KDE4:-yes}" != "yes" ]     && kde4="--disable-kde4"
 LOLANGS=${LOLANGS:-"de es fr id it ja nl vi zh-CN"}
-use_ccache="--disable-ccache" ; [ "${USE_CCACHE:-no}" != "no" ] && use_ccache=""
 
 # By default, LibreOffice ignores MAKEFLAGS -j option and uses all available cpu cores.
 parallel=""
@@ -110,6 +105,62 @@ elif [ "$JAVA" = "no" ]; then
   use_java="--with-java=no"
 fi
 
+# General optional use of packages available from SBo. If not found, LibreOffice internal versions are used
+if pkg-config --exists coinmp ; then coinmp="--with-system-coinmp" ; else coinmp="" ; fi
+if pkg-config --exists cppunit ; then cppunit="--with-system-cppunit" ; else cppunit="" ; fi
+if pkg-config --exists glm ; then glm="--with-system-glm" ; else glm="" ; fi
+if pkg-config --exists libabw-0.1 ; then libabw="--with-system-libabw" ; else libabw="" ; fi
+if pkg-config --exists libcdr-0.1 ; then libcdr="--with-system-libcdr" ; else libcdr="" ; fi
+if pkg-config --exists liblangtag ; then liblangtag="--with-system-liblangtag" ; else liblangtag="" ; fi
+if pkg-config --exists libcmis-0.5 ; then libcmis="--with-system-libcmis" ; else libcmis="" ; fi
+if pkg-config --exists libe-book-0.1 ; then libebook="--with-system-libebook" ; else libebook="" ; fi
+if pkg-config --exists libepubgen-0.1 ; then libepubgen="--with-system-libepubgen" ; else libepubgen="" ; fi
+if pkg-config --exists libeot ; then libeot="--with-system-libeot" ; else libeot="" ; fi
+if pkg-config --exists libetonyek-0.1 ; then libetonyek="--with-system-libetonyek" ; else libetonyek="" ; fi
+if pkg-config --exists libexttextcat ; then libexttextcat="--with-system-libexttextcat" ; else libexttextcat="" ; fi
+if pkg-config --exists libfreehand-0.1 ; then libfreehand="--with-system-libfreehand" ; else libfreehand="" ; fi
+if pkg-config --exists libmspub-0.1 ; then libmspub="--with-system-libmspub" ; else libmspub="" ; fi
+if pkg-config --exists libmwaw-0.3 ; then libmwaw="--with-system-libmwaw" ; else libmwaw="" ; fi
+if pkg-config --exists libnumbertext ; then libnumbertext="--with-system-libnumbertext" ; else libnumbertext="" ; fi
+if pkg-config --exists liborcus-0.13 ; then liborcus="--with-system-orcus" ; else liborcus="" ; fi
+if pkg-config --exists libpagemaker-0.0 ; then libpagemaker="--with-system-libpagemaker" ; else libpagemaker="" ; fi
+if pkg-config --exists libqxp-0.0 ; then libqxp="--with-system-libqxp" ; else libqxp="" ; fi
+if pkg-config --exists libstaroffice-0.0 ; then libstaroffice="--with-system-libstaroffice" ; else libstaroffice="" ; fi
+if pkg-config --exists libtommath ; then libtommath="--with-system-libtommath" ; else libtommath="" ; fi
+if pkg-config --exists libwps-0.4 ; then libwps="--with-system-libwps" ; else libwps="" ; fi
+if pkg-config --exists libzmf-0.0 ; then libzmf="--with-system-libzmf" ; else libzmf="" ; fi
+if pkg-config --exists libpq ; then postgresql="--with-system-postgresql" ; else postgresql="" ; fi
+if pkg-config --exists libucpp ; then ucpp="--with-system-ucpp" ; else ucpp="" ; fi
+if test -e /usr/include/lpsolve ; then lpsolve="--with-system-lpsolve" ; else lpsolve="" ; fi
+if pkg-config --exists mdds-1.2 ; then mdds="--with-system-mdds" ; else mdds="" ; fi
+if test -e /usr/include/mysql_connection.h ; then mysql="--with-system-mysql-cppconn" ; else mysql="" ; fi
+if pkg-config --exists mythes ; then mythes="--with-system-mythes" ; else mythes="" ; fi
+if test -x /usr/bin/odbc_config ; then odbc="--with-system-odbc" ; else odbc="" ; fi
+#if test -d /usr/lib${LIBDIRSUFFIX}/python3*/site-packages/lxml ; then lxml="--with-system-lxml" ; else lxml="" ; fi
+if pkg-config --exists xmlsec1 ; then xmlsec="--with-system-xmlsec" ; else xmlsec="" ; fi
+#if test -e /usr/share/ant/lib/rhino.jar ; then rhino="--with-system-rhino --with-rhino-jar=/usr/share/ant/lib/rhino.jar" ; else rhino="" ; fi
+if pkg-config --exists libvlc ; then vlc="--enable-vlc" ; else vlc="" ; fi
+# Building with vlc backend is marked as experimental so demand explicit indication via environment variable VLC to do it.
+[ "${VLC:-no}" != "yes" ] && vlc=""
+
+# Other options
+if pkg-config --exists avahi-core ; then avahi="--enable-avahi" ; else avahi="" ; fi
+if pkg-config --exists python3 ; then Python3="--enable-python=system" ; else Python3="" ; fi
+if pkg-config --exists Qt5 ; then qt5="--enable-qt5" ; else qt5="" ; fi
+if pkg-config --exists valgrind ; then valgrind="--with-valgrind" ; else valgrind="" ; fi
+
+kde4="--enable-kde4" ; [ "${KDE4:-yes}" != "yes" ]     && kde4="--disable-kde4"
+use_ccache="--disable-ccache" ; [ "${USE_CCACHE:-no}" != "no" ] && use_ccache=""
+
+# Extensions
+extct2n="--enable-ext-ct2n"; [ "${EXTCT2N:-no}" != "yes" ]     && extct2n=""
+extnumbertext="--enable-ext-numbertext"; [ "${EXTNUMBERTEXT:-no}" != "yes" ]     && extnumbertext=""
+extlanguagetool="--enable-ext-languagetool"; [ "${EXTLANGUAGETOOL:-no}" != "yes" ]     && extlanguagetool=""
+extwikipub="--enable-ext-wiki-publisher"; [ "${EXTWIKIPUB:-no}" != "yes" ]     && extwikipub=""
+
+extnlpsolver="--enable-ext-nlpsolver"; [ "${EXTNLPSOLVER:-yes}" != "yes" ]     && extnlpsolver=""
+extmariadb="--enable-ext-mariadb-connector"; [ "${EXTMARIADB:-yes}" != "yes" ]     && extmariadb=""
+
 ./configure \
     CFLAGS="$SLKCFLAGS" \
     CXXFLAGS="$SLKCFLAGS" \
@@ -124,17 +175,24 @@ fi
     --with-vendor="Just Another Slacker" \
     --with-lang="$LOLANGS" \
     --enable-release-build=yes  \
-    --enable-python="system" \
-    --enable-gio \
     --enable-ext-mariadb-connector \
+    --enable-gio \
+    $extct2n \
+    $extnumbertext \
+    $extnlpsolver \
+    $extlanguagetool \
+    $extmariadb \
+    $extwikipub \
     $avahi \
+    $Python3 \
     $vlc \
     $kde4 \
     $use_ccache \
     $use_java \
     $parallel \
-    --with-x \
+    --with-alloc=system \
     --with-tls="nss" \
+    --with-x \
     --without-krb5 \
     --without-gssapi \
     --without-junit \
@@ -147,27 +205,61 @@ fi
     --with-system-clucene \
     --with-system-curl \
     --with-system-dicts \
+    --with-system-epoxy \
     --with-system-expat \
     --with-system-hunspell \
     --with-system-icu \
     --with-system-jpeg \
     --with-system-lcms2 \
-    --with-system-libepoxy \
     --with-system-libodfgen \
     --with-system-libpng \
     --with-system-librevenge \
+    --with-system-libvisio \
     --with-system-libwpd \
     --with-system-libwpg \
     --with-system-libxml \
     --with-system-mariadb \
     --with-system-neon \
     --with-system-nss \
-    --with-system-openldap-client \
+    --with-system-openldap \
     --with-system-openssl \
     --with-system-poppler \
     --with-system-redland \
     --with-system-sane \
     --with-system-zlib \
+    $coinmp \
+    $cppunit \
+    $glm \
+    $libabw \
+    $libcdr \
+    $libcmis \
+    $libebook \
+    $libeot \
+    $libepubgen \
+    $mdds \
+    $libetonyek \
+    $libexttextcat \
+    $libfreehand \
+    $libmspub \
+    $libmwaw \
+    $liborcus \
+    $libnumbertext \
+    $libpagemaker \
+    $libqxp \
+    $libstaroffice \
+    $libtommath \
+    $libwps \
+    $libzmf \
+    $lpsolve \
+    $mythes \
+    $postgresql \
+    $qt5 \
+    $valgrind \
+    $ucpp \
+    $odbc \
+    $mysql \
+    $xmlsec \
+
 
 
 #Create a srcs tarball if we don't already have one
@@ -202,7 +294,9 @@ for df in $PKG/usr/lib$LIBDIRSUFFIX/$SRCNAM-$VERSION/share/xdg/*.desktop ; do
     sed -i -e "s/libreofficedev$SHORT_VERSION/libreoffice/g" $df
 done
 
-PYSITEDIR=$(python3 -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())")
+# Use the system python if we have it, else use the python just built with LibreOffice
+PYTHONEXE=$(which python3) || PYTHONEXE=$PKG/usr/lib$LIBDIRSUFFIX/$SRCNAM/program/python
+PYSITEDIR=$($PYTHONEXE -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())")
 mkdir -p $PKG/$PYSITEDIR
 cat <<EOF >$PKG/$PYSITEDIR/pyuno.pth
 import sys; sys.path.insert(0,'/usr/lib$LIBDIRSUFFIX/libreoffice/program')
diff --git a/office/LibreOffice/LibreOffice.info b/office/LibreOffice/LibreOffice.info
index a98fdf0501..56ff85e510 100644
--- a/office/LibreOffice/LibreOffice.info
+++ b/office/LibreOffice/LibreOffice.info
@@ -1,10 +1,10 @@
 PRGNAM="LibreOffice"
-VERSION="6.1.0.3"
+VERSION="6.1.1.2"
 HOMEPAGE="http://libreoffice.org"
-DOWNLOAD="http://download.documentfoundation.org/libreoffice/src/6.1.0/libreoffice-6.1.0.3.tar.xz \
-          http://sourceforge.net/projects/slackbuildsdirectlinks/files/LibreOffice/libreoffice-6.1.0.3-srcs.tar.xz"
-MD5SUM="df908c245f1dca4b822345b82af2ea64 \
-        69810b64a43cb48bce6e0899fa701b74"
+DOWNLOAD="http://download.documentfoundation.org/libreoffice/src/6.1.1/libreoffice-6.1.1.2.tar.xz \
+          http://sourceforge.net/projects/slackbuildsdirectlinks/files/LibreOffice/libreoffice-6.1.1.2-srcs.tar.xz"
+MD5SUM="738c31cb060e1c0655ddcd8b3593d66d \
+        9771b3579378da49221edd4f61e09552"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
 REQUIRES="python3 openjdk apache-ant perl-Archive-Zip"
diff --git a/office/LibreOffice/README b/office/LibreOffice/README
index e496e0ed49..1f868fb2aa 100644
--- a/office/LibreOffice/README
+++ b/office/LibreOffice/README
@@ -7,16 +7,34 @@ flowcharting application, Base, our database and database frontend,
 and Math for editing mathematics.
 
 This SlackBuild builds the entire project from its source code. In seeking a
-fully functional LibreOffice, most optional features are included by default.
-Build time environment variables that may set to vary features are as follows:
+fully functional LibreOffice, most optional features are included by default,
+using internal versions of any external software components that may be needed.
+This results in a very small number of directly required additional software
+packages.
+
+However most of this additional software is also available as SBo SlackBuilds.
+During configuration, the LibreOffice SlackBuild will detect any such packages
+that are already installed and use them in preference to building its own
+internal versions. Packages from SBo that will be use in this way are:
+    CoinMP cppunit glm libabw libcdr libcmis libe-book libeot libepubgen
+    libexttextcat libfreehand  libmspub libmwaw libnumbertext liborcus
+    libpagemaker libqxp libnumbertext libstaroffice libtommath libwps libzmf
+    lpsolve mythes postgresql qt5 valgrind ucpp unixODBC avahi
+    mysql-connector-c++ libetonyek xmlsec vlc
+
+Remember, these packages are not essential but entirely optional. If not found,
+LibreOffice will simply build its own internal versions.
+
+Also keep in mind that any package from the above list which is detected and
+used when building LibreOffice will most likely become a runtime dependency too
+e.g. if avahi is detected and used at build time, it will also need to be
+installed at run time.
+
+Build time environment variables that may be set to vary features are as follows:
 1. enable the experimental VLC avmedia backend (disabled by default) with:
   VLC="yes"
    This requires the vlc package (available from SBo) to be installed.
 
-2. enable avahi support (disabled by default) with:
-  AVAHI="yes"
-   This requires the avahi package (available from SBo) to be installed.
-
 3. disable kde4 support (enabled by default) with:
   KDE4="no"