simple AppRun shell script for testing

AppRun.sh

@@ -0,0 +1,48 @@
+#!/bin/sh -e
+
+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="$(ldconfig -p | grep "libstdc++\.so\.6 ($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="$(ldconfig -p | grep "libgcc_s\.so\.1 ($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
+
+#echo ">>>>> $LD_LIBRARY_PATH"
+#echo ">>>>> $LD_PRELOAD"
+
+$exec "$*"
+exit $?
+