Added back in darealshinji's libstdc++ workaround

.travis.yml

@@ -70,6 +70,8 @@ script:
       unset QTDIR; unset QT_PLUGIN_PATH ; unset LD_LIBRARY_PATH
       export VERSION=$(git rev-parse --short HEAD)
       ./linuxdeployqt-continuous-x86_64.AppImage appdir/usr/share/applications/*.desktop -bundle-non-qt-libs -verbose=2
+      mkdir -p appdir/usr/optional/ ; wget -c https://github.com/darealshinji/AppImageKit-checkrt/releases/download/continuous/exec-x86_64.so -O ./appdir/usr/optional/exec.so
+      mkdir -p appdir/usr/optional/libstdc++/ ; cp /usr/lib/x86_64-linux-gnu/libstdc++.so.6 ./appdir/usr/optional/libstdc++/
       ./linuxdeployqt*.AppImage --appimage-extract
       rm ./appdir/AppRun ; cp ./resources/AppRun appdir/ ; chmod a+x ./appdir/AppRun
       PATH=./squashfs-root/usr/bin:$PATH ./squashfs-root/usr/bin/appimagetool -g ./appdir/

Desktop_Interface/resources/AppRun

@@ -1,6 +1,45 @@
 #!/bin/bash
 
 HERE="$(dirname "$(readlink -f "${0}")")"
+cd "$(dirname "$0")"
+
+cxxpre=""
+gccpre=""
+execpre=""
+libc6arch="libc6,x86-64"
+exec="./bin/$(sed -n 's|^Exec=||p' $(ls -1 *.desktop))"
+
+if [ -n "$APPIMAGE" ] && [ "$(file -b "$APPIMAGE" | cut -d, -f2)" != " x86-64" ]; then
+  libc6arch="libc6"
+fi
+
+cd "usr"
+
+if [ -e "./optional/libstdc++/libstdc++.so.6" ]; then
+  lib="$(PATH="/sbin:$PATH" ldconfig -p | grep "libstdc++\.so\.6 ($libc6arch)" | awk 'NR==1{print $NF}')"
+  sym_sys=$(tr '\0' '\n' < "$lib" | grep -e '^GLIBCXX_3\.4' | tail -n1)
+  sym_app=$(tr '\0' '\n' < "./optional/libstdc++/libstdc++.so.6" | grep -e '^GLIBCXX_3\.4' | tail -n1)
+  if [ "$(printf "${sym_sys}\n${sym_app}"| sort -V | tail -1)" != "$sym_sys" ]; then
+    cxxpath="./optional/libstdc++:"
+  fi
+fi
+
+if [ -e "./optional/libgcc/libgcc_s.so.1" ]; then
+  lib="$(PATH="/sbin:$PATH" ldconfig -p | grep "libgcc_s\.so\.1 ($libc6arch)" | awk 'NR==1{print $NF}')"
+  sym_sys=$(tr '\0' '\n' < "$lib" | grep -e '^GCC_[0-9]\\.[0-9]' | tail -n1)
+  sym_app=$(tr '\0' '\n' < "./optional/libgcc/libgcc_s.so.1" | grep -e '^GCC_[0-9]\\.[0-9]' | tail -n1)
+  if [ "$(printf "${sym_sys}\n${sym_app}"| sort -V | tail -1)" != "$sym_sys" ]; then
+    gccpath="./optional/libgcc:"
+  fi
+fi
+
+if [ -n "$cxxpath" ] || [ -n "$gccpath" ]; then
+  if [ -e "./optional/exec.so" ]; then
+    execpre=""
+    export LD_PRELOAD="./optional/exec.so:${LD_PRELOAD}"
+  fi
+  export LD_LIBRARY_PATH="${cxxpath}${gccpath}${LD_LIBRARY_PATH}"
+fi
 
 cat > /tmp/roothelper <<\EOoF
 #!/bin/bash