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# See if we need to provide obstacks.
dnl Copyright 1996-2020 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl This replaces Autoconf's AC_FUNC_OBSTACK.
dnl The Autoconf version should be marked obsolete at some point.
AC_DEFUN([AC_FUNC_OBSTACK],
[AC_LIBSOURCES([obstack.h, obstack.c])dnl
AC_CACHE_CHECK([for obstacks that work with any size object],
[ac_cv_func_obstack],
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#include "obstack.h"
void *obstack_chunk_alloc (size_t n) { return 0; }
void obstack_chunk_free (void *p) { }
/* Check that an internal function returns size_t, not int. */
size_t _obstack_memory_used (struct obstack *);
]],
[[struct obstack mem;
obstack_init (&mem);
obstack_free (&mem, 0);
]])],
[ac_cv_func_obstack=yes],
[ac_cv_func_obstack=no])])
if test "$ac_cv_func_obstack" = yes; then
AC_DEFINE([HAVE_OBSTACK], 1,
[Define to 1 if the system has obstacks that work with any size object.])
else
AC_LIBOBJ([obstack])
fi
])
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