I would like to be able to write the following:

Lorem ipsum dolorfootnote{Sit tamen non caveat.} ipsum quotidie.footnote{Cras lorem dolorrime.}

footnotes

so that it is expanded as follows when running gpp -T:

Lorem ipsum dolor[1] ipsum quotidie.[2]

[1]: Sit tamen non caveat.
[2]: Cras lorem dolorrime.

I have tried to define the following macros:

define{footno}{0}
define{footnotes}{}
define{footnote}{define{footno}{eval{footno+1}}[footno]
    define{footnotes}{footnotes
    [footno]: #1}}

But I get the following error message:

warning: the defined(...) macro is already defined
warning: the defined(...) macro is already defined
warning: the defined(...) macro is already defined
warning: the defined(...) macro is already defined
warning: the defined(...) macro is already defined
warning: the defined(...) macro is already defined
warning: the defined(...) macro is already defined
error: Stack depth exceeded during parse