float error

[J. Johnston]

wjyasd wrote:
> 
>  Hi,
>      I have been trying to get newlib  to compile a share library for m68k-elf target under cygwin on win98.
> 

JinYu,

  You are going to have to give some details.  How did you configure?
Have you made alterations to the library or are you attempting to use
a piece of the library?  What error are you getting for _stdout_r
(_REENT)->_data?  Is _REENT (aka _impure_ptr) 0?  

  The reentrancy scheme uses a reentrant structure which should be
instantiated by libc/reent/impure.c.  The _REENT is just a macro
which defines to _impure_ptr.  You should check the value of this
when you fail.  You should also check to see that the impure_data structure
has properly been initialized.

-- Jeff J.


> When I used printf("%f",x) it couldn't run.
> 
> frist,I change the printf.c
> 
> //  _stdout_r (_REENT)->_data = _REENT;
> //  ret = vfprintf (_stdout_r (_REENT), fmt, ap);
> into
>   FILE f;
>   f._data = _REENT;
>   ret = vfprintf ( &f, fmt, ap);
> 
> If I don't change it ,program will stop at "  _stdout_r (_REENT)->_data = _REENT;"
> 
> I debug it into [static char *cvt _PARAMS((struct _reent *, double, int, int, char *, int *, int, int *));] and dtoa.c file
> 
> And at dtoa.c file
> 
>         234       _Bigint *b, *b1, *delta, *mlo, *mhi, *S;
>         235       double ds;
> -       236       char *s, *s0;
>         237
> -       238       d.d = _d;
>         239
> -       240       if (ptr->_result)        <<--------error!@
> -       241         {
> -       242           ptr->_result->_k = ptr->_result_k;
> -       243           ptr->_result->_maxwds = 1 << ptr->_result_k;
>         244           Bfree (ptr, ptr->_result);
>         245           ptr->_result = 0;
> -       246         }
> 
> 
> When program run to 240 lines It stop again ,I don't know how to work out .
> Can float part  running under m68k if not can someone point me at the right line
> to use.
> 
> thanks
> 
> JinYU Wu