Using non-standard GNU GLOBAL options from within Emacs

[per . nordlow]

I have nocited that some of the options to GNU GLOBAL (for example
--symbol) are not enabled with the standard Emacs GNU GLOBAL interface.
How do I enable such flags when performing lookups from withing Emacs?

Some useful options:
`-s', `--symbol'
    Collect symbols other than functions. By default, locate function
definitions.
`-t', `--typedef'
    Pick up not only function but also typedef name and enum member as
a definition. 


Many thanks in advance,

Per Nordlöw