how autoreconf works ?

[Vincent Torri]

Hello,

I would like to kow how autoreconf works. More precisely, I would like to 
know how it knows which options have already been passed a previous call 
of configure.

I ask that because I use configure to initialize some files, these latter 
being used by a Makefile. And I would like to do the same thing than 
autoreconf in that Makefile.

Thank you

Vincent Torri