alloca()

[rlau@csc.com]

I have cygwin32 and gcc/g77 and use it to compile some FORTRAN code.  Does
anyone know where alloca() comes from?
I heard that alloca() is built-in, but does that eventually calls something that
is inherent to MICROSOFT or Kernel32 libraries?

If gcc is not using anything from MICROSOFT libraries, how can I find it.  I
have looked the the symbol table for all the libraries
that come with cygwin32, but could not find where alloca is actually
implemented.

alloca() is a cool function because it allocates memory from the stack segment -
for those of you interesed in alloca.


Thanks