DESCRIPTION

     The alloca function allocates size bytes  of  space  in  the
     stack frame of the caller.  This temporary space is automat-
     ically freed on return.

RETURN VALUES

     The alloca function returns a pointer to  the  beginning  of
     the  allocated  space.   If  the  allocation  failed, a NULL
     pointer is returned.

CONFORMING TO

     There is evidence that the alloca function appeared in  32v,
     pwb,  pwb.2,  3bsd, and 4bsd.  There is a man page for it in
     BSD 4.3.  Linux uses the GNU version.

BUGS

     The alloca function is machine dependent.

SEE ALSO

     brk(2), pagesize(2), calloc(3),