Fix error when plotting from IDL 8.5

Originally from here

Issue when trying to plot from IDL 8.5 running XQuarts 2.7 the follow error occurs

Error: attempt to add non-widget child "dsm" to parent "idl" which supports only widgets

A workaround is to alter the idl and idlde scripts making sure the DYLD_LIBRARY_PATH environment variable includes the directory /opt/X11/lib/flat_namespace/

So at around line 245 in idl /Applications/exelis/idl85/bin/idl

if [ "$DYLD_LIBRARY_PATH" = "" ]; then
    DYLD_LIBRARY_PATH="/opt/X11/lib/flat_namespace:$BIN_DIR"
    #DYLD_LIBRARY_PATH="$BIN_DIR"
else
    DYLD_LIBRARY_PATH="/opt/X11/lib/flat_namespace:$BIN_DIR:$DYLD_LIBRARY_PATH"
    #DYLD_LIBRARY_PATH="$BIN_DIR:$DYLD_LIBRARY_PATH"
fi

and in idlde /Applications/exelis/idl85/bin/idlde

if [ "$APPLICATION" = "idlde" ]; then
    # add bindir for idlde shareable libraries
    #DYLD_LIBRARY_PATH="$BIN_DIR_IDLDE:$DYLD_LIBRARY_PATH"
    DYLD_LIBRARY_PATH="/opt/X11/lib/flat_namespace:$BIN_DIR_IDLDE:$DYLD_LIBRARY_PATH"
    IDL_START_DIR_DARWIN=`pwd`
    export IDL_START_DIR_DARWIN
fi

also see XQartz release notes

By @Shane Maloney in
Tags : #osx, #idl, #x11,