alloca - memory allocator
SYNOPSIS
       #include <stdlib.h>
       void *alloca( size_t size);
DESCRIPTION
       The  alloca  function allocates size bytes of space in the
       stack frame of the caller.  This temporary space is  auto
       matically freed on return.
RETURN VALUE
       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), malloc(3), realloc(3)
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