diff --git a/Apps/abakus/abakus.SlackBuild b/Apps/abakus/abakus.SlackBuild
index 23ead3c..361da77 100755
--- a/Apps/abakus/abakus.SlackBuild
+++ b/Apps/abakus/abakus.SlackBuild
@@ -49,6 +49,7 @@ cmake ${G_NINJA:-} \
     -DCMAKE_CXX_COMPILER=$COMPILER_CXX \
     -DCMAKE_BUILD_TYPE=Release \
     -DCMAKE_INSTALL_PREFIX=$INSTALL_TDE \
+    -DWITH_GCC_VISIBILITY=${GCC_VIS:-} \
     -DBUILD_DOC="ON" \
     -DBUILD_TRANSLATIONS="ON" \
     -Wno-dev \
diff --git a/Apps/filelight/filelight.SlackBuild b/Apps/filelight/filelight.SlackBuild
index b1d11c5..06efa61 100755
--- a/Apps/filelight/filelight.SlackBuild
+++ b/Apps/filelight/filelight.SlackBuild
@@ -54,6 +54,7 @@ cmake ${G_NINJA:-} \
     -DLIB_SUFFIX=$LIBDIRSUFFIX \
     -DMAN_INSTALL_DIR=$INSTALL_TDE/man \
     -DPLUGIN_INSTALL_DIR=$INSTALL_TDE/lib$LIBDIRSUFFIX/$PLUGIN_INSTALL_DIR \
+    -DWITH_GCC_VISIBILITY=${GCC_VIS:-} \
     -DBUILD_DOC="ON" \
     -DBUILD_TRANSLATIONS="ON" \
     -Wno-dev \
diff --git a/Apps/klamav/klamav.SlackBuild b/Apps/klamav/klamav.SlackBuild
index da2eb60..d9db6a4 100644
--- a/Apps/klamav/klamav.SlackBuild
+++ b/Apps/klamav/klamav.SlackBuild
@@ -33,14 +33,15 @@ source ../../get-source.sh
 ## klamav needs clamav as a build time requirement
 [[ $(cat $TMPVARS/PRE_DOWNLOAD) != yes ]] && {
 # ### clamav  - start
-clamav_installed_fn () { ldconfig -p|grep libclamav 1>/dev/null ;}
+clamav_installed_fn () { pkg-config libclamav ;}
 ## If it's already installed, go to end
 clamav_installed_fn || {
 ## otherwise, if the source archive is in 'src' ..
 [[ -s $BUILD_TDE_ROOT/src/clamav-0.103.3.tar.gz ]] && {
 ## .. build, package, and install it
 (
-echo -e "\n building clamav \n"
+echo "
+ building clamav"
 
 getsource_fn # to set SLKCFLAGS
 
@@ -70,10 +71,12 @@ sed -i '96iendif()' docs/CMakeLists.txt
 mkdir build/docs
 cp -a docs/html build/docs/
 
+[[ $GCC_VIS == 0 ]] && unset GCC_VIS # needs to be unset for parameter expansion for CMAKE_CXX_FLAGS
 cd build/
 # LIBDIRSUFFIX not required - any suffix is included in CMAKE_INSTALL_LIBDIR
 cmake ${G_NINJA:-} \
     -DCMAKE_C_FLAGS="$SLKCFLAGS" \
+    -DCMAKE_CXX_FLAGS="$SLKCFLAGS ${GCC_VIS:+-fvisibility=hidden -fvisibility-inlines-hidden}" \
     -DCMAKE_BUILD_TYPE=Release \
     -DENABLE_SYSTEMD_DEFAULT="OFF" \
     -Wno-dev \
@@ -91,13 +94,26 @@ cd $TMP_BUILD/package-clamav
 makepkg -l y -c n $OUTPUT/clamav-0.103.3-$ARCH-$BUILD.txz
 installpkg $OUTPUT/clamav-0.103.3-$ARCH-$BUILD.txz
 )
-echo -e "\n now building klamav \n"
-clamav_installed_fn || { echo -e "\033[39;1m"" ## installation of clamav failed ##\n""\033[0m" ; exit 1 ; }
+clamav_installed_fn && echo "
+ now building klamav" || { echo -e "\033[39;1m
+ ## installation of clamav failed ##
+ \033[0m" ; exit 1 ; }
 } || { ## .. but if the source archive isn't in 'src', display message ..
-echo -e "\n ############ \n\n\033[39;1m clamav is not installed and is required for this build \n
- Download \033[0m [including user-agent, otherwise '403 Forbidden' is returned]:
-\n \033[39;1m wget -O $BUILD_TDE_ROOT/src/clamav-0.103.3.tar.gz --user-agent='Mozilla' https://www.clamav.net/downloads/production/clamav-0.103.3.tar.gz \033[0m
-\n and re-run this script .. \n\n ############ \n" ; exit 1 ; }
+echo -e "
+ ############
+
+ clamav is required for klamav
+ It's not installed nor is the source archive in the 'src' directory
+
+ Download [including user-agent, otherwise '403 Forbidden' is returned]:
+             \033[39;1m
+( cd $BUILD_TDE_ROOT/src
+ wget --user-agent='Mozilla' https://www.clamav.net/downloads/production/clamav-0.103.3.tar.gz )
+             \033[0m
+ and re-run this script ..
+
+ ############
+" ; exit 1 ; }
 }
 # ### clamav - end
 }
diff --git a/Apps/knights/README b/Apps/knights/README
index 883bc67..bd5331f 100755
--- a/Apps/knights/README
+++ b/Apps/knights/README
@@ -3,4 +3,11 @@ There is a Spanish language file in the source, but it has no translations in it
 Any involvement from a Spanish speaker to check and correct will be welcome. Kbabel is not necessary, it will display in a text editor just fine.
 
 Tested with gnuchess-6.2.2, stockfish-7-linux, and komodo-7, in UCI mode.
+
+-----------
+A themepack is available and will be included if pre-downloaded to the 'src' directory or downloaded during the build:
+
+https://downloads.sourceforge.net/project/knights/knights-themepack/0.5.9/knights-themepack-0.5.9.tar.gz
+
+If it's not in 'src', the build will continue with the default theme.
  
diff --git a/Apps/knights/knights.SlackBuild b/Apps/knights/knights.SlackBuild
index 14226e3..2bfa961 100755
--- a/Apps/knights/knights.SlackBuild
+++ b/Apps/knights/knights.SlackBuild
@@ -31,6 +31,22 @@ TAG=${TAG:-_tde}
 source ../../get-source.sh
 getsource_fn
 
+## run getsource_fn for the theme-pack ... in a shell so that the variables don't leak into the build
+(ARCHIVE_TYPE="tar.gz"
+PRGNAM=knights-themepack
+VERSION=0.5.9
+SRCURL="https://downloads.sourceforge.net/project/knights/knights-themepack/0.5.9/$PRGNAM-$VERSION.$ARCHIVE_TYPE"
+getsource_fn
+)
+[[ -s $SRCDIR/knights-themepack-0.5.9.tar.gz ]] || \
+echo '
+ ##########
+
+ The build will continue without additional boards and chessman themes
+ being added to the package.
+
+ ##########'
+
 untar_fn
 
 # there is a Spanish language file in the source, but it has no translations in it ..
@@ -48,7 +64,6 @@ chown_fn
 cd_builddir_fn
 
 ## BUILD_EXTRA_THEME is a 14.1.0 option and will be ignored for 14.0.n builds
-## See the slack-desc for a URL for additional themes
 cmake ${G_NINJA:-} \
     -DCMAKE_C_FLAGS="$SLKRCFLAGS" \
     -DCMAKE_CXX_FLAGS="$SLKRCFLAGS" \
@@ -66,6 +81,10 @@ cmake ${G_NINJA:-} \
 
 make_fn
 
+## if the theme-pack exists, install the themes
+[[ -s $SRCDIR/knights-themepack-0.5.9.tar.gz ]] && \
+tar xf $SRCDIR/knights-themepack-0.5.9.tar.gz --exclude=??????? -C $PKG$INSTALL_TDE/share/apps/knights/themes --strip-components=1
+
 installdocs_fn
 
 mangzip_fn
@@ -76,6 +95,8 @@ mkdir_install_fn
 
 doinst_sh_fn
 
+[[ -s $PKG$INSTALL_TDE/share/apps/knights/themes/KBBrushed_Liquid.tar.gz ]] && \
+ADDL_THEMES="Includes additional boards and chessman themes"
 echo "
 # HOW TO EDIT THIS FILE:
 # The 'handy ruler' below makes it easier to edit a package description.  Line
@@ -86,8 +107,8 @@ echo "
        |-----handy-ruler------------------------------------------------------|
 $PRGNAM: A graphical chess interface for the Trinity Desktop Environment
 $PRGNAM:
-$PRGNAM: Download themepack [additional boards and chessman themes] from:
-$PRGNAM:         https://sourceforge.net/project/showfiles.php?group_id=31461
+$PRGNAM: ${ADDL_THEMES:-"A themepack is available for additional boards and chessman themes"}
+$PRGNAM:
 $PRGNAM:
 $PRGNAM: Needs separate chess engines, for example gnuchess, stockfish, komodo.
 $PRGNAM:
diff --git a/Apps/rosegarden/rosegarden.SlackBuild b/Apps/rosegarden/rosegarden.SlackBuild
index fd1469b..a9a4618 100755
--- a/Apps/rosegarden/rosegarden.SlackBuild
+++ b/Apps/rosegarden/rosegarden.SlackBuild
@@ -58,6 +58,9 @@ sed -i "s|\${po_files}|$langs|" po/CMakeLists.txt
 langs=$(echo $langs|sed "s|/$PRGNAM.po||g")
 [[ $langs != "" ]] && TRANS=ON
 
+## delete zero length files
+find data/pixmaps/feta -type f -empty -delete
+
 listdocs_fn
 
 chown_fn
@@ -78,6 +81,7 @@ cmake ${G_NINJA:-} \
     -DCMAKE_BUILD_TYPE=Release \
     -DCMAKE_INSTALL_PREFIX=$INSTALL_TDE \
     -DLIB_SUFFIX=$LIBDIRSUFFIX \
+    -DWITH_GCC_VISIBILITY=${GCC_VIS:-} \
     -DBUILD_DOC="ON" \
     -DBUILD_TRANSLATIONS=${TRANS:-"OFF"} \
     -DWANT_SOUND="ON" \
diff --git a/BUILD-TDE.sh b/BUILD-TDE.sh
index 5a08844..4d185c4 100755
--- a/BUILD-TDE.sh
+++ b/BUILD-TDE.sh
@@ -82,7 +82,7 @@ TMP=${TMP:-/tmp}
 export BUILD_TDE_ROOT=$(pwd)
 
 # Place to build (TMP_BUILD), package (PKG), and output (OUTPUT) the program:
-## ### moved from get-source.sh to export variables for ocaml, facile, gdl, and double-conversion builds
+## ### moved from get-source.sh to export variables for ocaml, facile, and double-conversion builds
 export TMP_BUILD=$TMP/build
 #export PKG=$TMP_BUILD/package-$PRGNAM
 export OUTPUT=$TMP
diff --git a/Core/tdegraphics/tdegraphics.SlackBuild b/Core/tdegraphics/tdegraphics.SlackBuild
index be690ac..2486f84 100755
--- a/Core/tdegraphics/tdegraphics.SlackBuild
+++ b/Core/tdegraphics/tdegraphics.SlackBuild
@@ -48,6 +48,47 @@ echo $'
 +</includes>
 ' | patch -N -p0 || true
 
+## for poppler-22.03+
+patch -N -p0 << EOF || true
+--- config.h.cmake
++++ config.h.cmake
+@@ -3,2 +3,3 @@
+ // poppler-tqt
++#cmakedefine HAVE_POPPLER_2203
+ #cmakedefine HAVE_POPPLER_2112
+--- tdefile-plugins/dependencies/poppler-tqt/ConfigureChecks.cmake
++++ tdefile-plugins/dependencies/poppler-tqt/ConfigureChecks.cmake
+@@ -27,1 +27,1 @@
+-foreach( _poppler_ver 0.58 0.64 0.70 0.71 0.72 0.76 0.82 0.83 0.86 21.08 21.11 21.12 )
++foreach( _poppler_ver 0.58 0.64 0.70 0.71 0.72 0.76 0.82 0.83 0.86 21.08 21.11 21.12 22.03 )
+--- tdefile-plugins/dependencies/poppler-tqt/poppler-document.cpp
++++ tdefile-plugins/dependencies/poppler-tqt/poppler-document.cpp
+@@ -53,1 +53,5 @@
++# if defined(HAVE_POPPLER_2203)
++  DocumentData *doc = new DocumentData(std::make_unique<GooString>(TQFile::encodeName(filePath)), {});
++# else
+   DocumentData *doc = new DocumentData(new GooString(TQFile::encodeName(filePath)), NULL);
++# endif
+@@ -87,4 +91,9 @@
++#   if defined(HAVE_POPPLER_2203)
++    DocumentData *doc2 = new DocumentData(std::make_unique<GooString>(data->doc.getFileName()),
++                                          GooString(password.data()));
++#   else
+     GooString *filename = new GooString(data->doc.getFileName());
+     GooString *pwd = new GooString(password.data());
+     DocumentData *doc2 = new DocumentData(filename, pwd);
+     delete pwd;
++#   endif
+--- tdefile-plugins/dependencies/poppler-tqt/poppler-private.h
++++ tdefile-plugins/dependencies/poppler-tqt/poppler-private.h
+@@ -107,1 +107,5 @@
++#   if defined(HAVE_POPPLER_2203)
++    DocumentData(std::unique_ptr<GooString> &&filePath, const std::optional<GooString> &password) : doc(std::move(filePath), password), m_fontInfoScanner(0), m_outputDev(0) {}
++#   else
+     DocumentData(GooString *filePath, GooString *password) : doc(filePath,password), m_fontInfoScanner(0), m_outputDev(0) {}
++#   endif
+EOF
+
 listdocs_fn
 
 chown_fn
@@ -55,7 +96,7 @@ chown_fn
 cd_builddir_fn
 
 # If imlib is installed, include Kuickshow:
-[[ -s /usr/include/Imlib.h ]] && KUICKSHOW=ON
+pkg-config imlib && KUICKSHOW=ON
 cmake ${G_NINJA:-} \
     -DCMAKE_C_FLAGS="$SLKRCFLAGS" \
     -DCMAKE_CXX_FLAGS="$SLKRCFLAGS" \
@@ -67,7 +108,7 @@ cmake ${G_NINJA:-} \
     -DPLUGIN_INSTALL_DIR=$INSTALL_TDE/lib$LIBDIRSUFFIX/$PLUGIN_INSTALL_DIR \
     -DWITH_T1LIB="OFF" \
     -DWITH_PAPER="OFF" \
-    -DWITH_TIFF="OFF" \
+    -DWITH_TIFF="ON" \
     -DWITH_OPENEXR="OFF" \
     -DWITH_PDF="ON" \
     -DBUILD_DOC="ON" \
@@ -75,7 +116,7 @@ cmake ${G_NINJA:-} \
     -DBUILD_KUICKSHOW=${KUICKSHOW:-OFF} \
     -DBUILD_KPDF="ON" \
     -DBUILD_KAMERA="OFF" \
-    -DBUILD_KSVG="OFF" \
+    -DBUILD_KSVG="ON" \
     -DBUILD_LIBKSCAN="OFF" \
     -DBUILD_KOOKA="OFF" \
     -DBUILD_KCOLOREDIT="ON" \
diff --git a/Core/tdeutils/tdeutils.SlackBuild b/Core/tdeutils/tdeutils.SlackBuild
index 3afb996..535af28 100755
--- a/Core/tdeutils/tdeutils.SlackBuild
+++ b/Core/tdeutils/tdeutils.SlackBuild
@@ -33,6 +33,18 @@ getsource_fn
 
 untar_fn
 
+## Re: issue 28
+## work-around for clang build failure - flag applied to kmilo generic build only
+## ...kmilo/generic/generic_monitor.cpp:78:16: error: non-constant-expression cannot be narrowed from type 'int' to 'uint' (aka 'unsigned int') in initializer list [-Wc++11-narrowing]
+##                { "Search", TDEShortcut("XF86Search"), TQT_SLOT(launchSearch()) },
+##                            ^~~~~~~~~~~~~~~~~~~~~~~~~
+[[ $COMPILER_CXX == clang++ ]] && {
+## pending upstream fix
+[[ $(grep 'Search", TDEShortcut("XF86Search"), TQT_SLOT' kmilo/generic/generic_monitor.cpp) ]] && \
+echo '
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-c++11-narrowing")' >> kmilo/generic/CMakeLists.txt
+}
+
 ## set installation directory for superkaramba.desktop file
 sed -i 's|DESTINATION ${APPS_INSTALL_DIR}/Utilities|DESTINATION ${XDG_APPS_INSTALL_DIR}|' superkaramba/src/CMakeLists.txt
 
diff --git a/get-source.sh b/get-source.sh
index 378260f..441c2a6 100755
--- a/get-source.sh
+++ b/get-source.sh
@@ -48,7 +48,7 @@ getsource_fn ()
 #   SUCH DAMAGE.
 
 # Place to build (TMP_BUILD) package (PKG) and output (OUTPUT) the program:
-## ### moved to BUILD-TDE.sh to export variables for ocaml, facile, gdl, and double-conversion builds
+## ### moved to BUILD-TDE.sh to export variables for ocaml, facile, and double-conversion builds
 # ### TMP_BUILD=/tmp/build
 PKG=$TMP_BUILD/package-$PRGNAM
 # ### OUTPUT=/tmp