1# See if we need to provide obstacks.
2
3dnl Copyright 1996-2020 Free Software Foundation, Inc.
4dnl This file is free software; the Free Software Foundation
5dnl gives unlimited permission to copy and/or distribute it,
6dnl with or without modifications, as long as this notice is preserved.
7
8dnl This replaces Autoconf's AC_FUNC_OBSTACK.
9dnl The Autoconf version should be marked obsolete at some point.
10
11AC_DEFUN([AC_FUNC_OBSTACK],
12  [AC_LIBSOURCES([obstack.h, obstack.c])dnl
13   AC_CACHE_CHECK([for obstacks that work with any size object],
14     [ac_cv_func_obstack],
15     [AC_LINK_IFELSE(
16        [AC_LANG_PROGRAM(
17           [[#include "obstack.h"
18             void *obstack_chunk_alloc (size_t n) { return 0; }
19             void obstack_chunk_free (void *p) { }
20             /* Check that an internal function returns size_t, not int.  */
21             size_t _obstack_memory_used (struct obstack *);
22            ]],
23           [[struct obstack mem;
24             obstack_init (&mem);
25             obstack_free (&mem, 0);
26           ]])],
27        [ac_cv_func_obstack=yes],
28        [ac_cv_func_obstack=no])])
29   if test "$ac_cv_func_obstack" = yes; then
30     AC_DEFINE([HAVE_OBSTACK], 1,
31       [Define to 1 if the system has obstacks that work with any size object.])
32   else
33     AC_LIBOBJ([obstack])
34   fi
35])
36