i-bash/memalloc.h

/* memalloc.h -- consolidate code for including alloca.h or malloc.h and
   defining alloca. */

/* Copyright (C) 1993 Free Software Foundation, Inc.

   This file is part of GNU Bash, the Bourne Again SHell.

   Bash is free software; you can redistribute it and/or modify it under
   the terms of the GNU General Public License as published by the Free
   Software Foundation; either version 2, or (at your option) any later
   version.

   Bash is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or
   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   for more details.

   You should have received a copy of the GNU General Public License along
   with Bash; see the file COPYING.  If not, write to the Free Software
   Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */

#if !defined (_MEMALLOC_H_)
#  define _MEMALLOC_H_

#if defined (sparc) && defined (sun) && !defined (HAVE_ALLOCA_H)
#  define HAVE_ALLOCA_H
#endif

#if defined (__GNUC__) && !defined (HAVE_ALLOCA)
#  define HAVE_ALLOCA
#endif

#if defined (HAVE_ALLOCA_H) && !defined (HAVE_ALLOCA)
#  define HAVE_ALLOCA
#endif /* HAVE_ALLOCA_H && !HAVE_ALLOCA */

#if defined (__GNUC__) && !defined (C_ALLOCA)
#  undef alloca
#  define alloca __builtin_alloca
#else /* !__GNUC__ || C_ALLOCA */
#  if defined (HAVE_ALLOCA_H) && !defined (C_ALLOCA)
#    if defined (IBMESA)
#      include <malloc.h>
#    else /* !IBMESA */
#      include <alloca.h>
#    endif /* !IBMESA */
#  else  /* !HAVE_ALLOCA_H || C_ALLOCA */
#    if defined (__hpux) && defined (__STDC__) && !defined (alloca)
extern void *alloca ();
#    else
#      if !defined (alloca)
extern char *alloca ();
#      endif /* !alloca */
#    endif /* !__hpux || !__STDC__ && !alloca */
#  endif /* !HAVE_ALLOCA_H || C_ALLOCA */
#endif /* !__GNUC__ || C_ALLOCA */

#endif /* _MEMALLOC_H_ */