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  dir = depth ? find_stack_direction (addr, depth - 1) : 0;
  return dir + dummy;
}

int
main (int argc, char **argv)
{
  return find_stack_direction (0, argc + !argv + 20) < 0;
}
_ACEOF
if ac_fn_c_try_run "$LINENO"; then :
  ac_cv_c_stack_direction=1
else
  ac_cv_c_stack_direction=-1
fi
rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
  conftest.$ac_objext conftest.beam conftest.$ac_ext
fi

fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_stack_direction" >&5
$as_echo "$ac_cv_c_stack_direction" >&6; }
cat >>confdefs.h <<_ACEOF
#define STACK_DIRECTION $ac_cv_c_stack_direction
_ACEOF


fi

{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for working strtod" >&5
$as_echo_n "checking for working strtod... " >&6; }
if ${ac_cv_func_strtod+:} false; then :
  $as_echo_n "(cached) " >&6
else
  if test "$cross_compiling" = yes; then :
  ac_cv_func_strtod=no
else
  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h.  */

$ac_includes_default
#ifndef strtod
double strtod ();
#endif
int
main()
{
  {
    /* Some versions of Linux strtod mis-parse strings with leading '+'.  */
    char *string = " +69";
    char *term;
    double value;
    value = strtod (string, &term);
    if (value != 69 || term != (string + 4))
      return 1;
  }

  {
    /* Under Solaris 2.4, strtod returns the wrong value for the
       terminating character under some conditions.  */
    char *string = "NaN";
    char *term;
    strtod (string, &term);
    if (term != string && *(term - 1) == 0)
      return 1;
  }
  return 0;
}

_ACEOF
if ac_fn_c_try_run "$LINENO"; then :
  ac_cv_func_strtod=yes
else
  ac_cv_func_strtod=no
fi
rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
  conftest.$ac_objext conftest.beam conftest.$ac_ext
fi

fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_strtod" >&5
$as_echo "$ac_cv_func_strtod" >&6; }
if test $ac_cv_func_strtod = no; then
  case " $LIBOBJS " in
  *" strtod.$ac_objext "* ) ;;
  *) LIBOBJS="$LIBOBJS strtod.$ac_objext"
 ;;
esac

ac_fn_c_check_func "$LINENO" "pow" "ac_cv_func_pow"
if test "x$ac_cv_func_pow" = xyes; then :

fi

if test $ac_cv_func_pow = no; then
  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pow in -lm" >&5
$as_echo_n "checking for pow in -lm... " >&6; }
if ${ac_cv_lib_m_pow+:} false; then :
  $as_echo_n "(cached) " >&6
else
  ac_check_lib_save_LIBS=$LIBS
LIBS="-lm  $LIBS"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h.  */

/* Override any GCC internal prototype to avoid an error.
   Use char because int might match the return type of a GCC
   builtin and then its argument prototype would still apply.  */
#ifdef __cplusplus
extern "C"
#endif
char pow ();
int
main ()
{
return pow ();
  ;
  return 0;
}
_ACEOF
if ac_fn_c_try_link "$LINENO"; then :