i386-rtems setjmp.h patch

[J. Johnston]

Joel Sherrill wrote:
> I don't claim to fully understand why the i386 has such a complicated
> path to figuring out _JBLEN but it didn't work for rtems.  Honestly I
> am not sure if using setjmp-dj.h gets everything defined for targets
> that
> use that either.  

It does.  You'll see that the jmp_buf is defined already and so we
don't redefine it.  The problem is when we fall into the last part
which is enabled for CYGWIN and __rtems__ that needs the _JBLEN macro
to be set.

It looks like _JBLEN of 9 is what that structure is
> accomplishing.  Anyway i386-rtems targets need this one.  Please
> commit it.
> 

Do you mean 9 ints or do you mean 36 ints?  Because _JBTYPE is undefined,
it will declare _JBLEN ints.

-- Jeff J.

> 2002-12-06	Joel Sherrill <joel@OARcorp.com>
> 
> 	* libc/include/machine/setjmp.h: Make sure _JBLEN is defined
> 	for i386-rtems targets.
> 
> diff -uNr
> /usr1/rtems/work-tools/original/newlib-1.10.0/newlib/libc/include/machine/setjmp.h
> newlib-1.10.0/newlib/libc/include/machine/setjmp.h
> ---
> /usr1/rtems/work-tools/original/newlib-1.10.0/newlib/libc/include/machine/setjmp.h 
> Fri Feb  1 17:27:10 2002
> +++ newlib-1.10.0/newlib/libc/include/machine/setjmp.h  Wed Nov 27
> 07:55:10 2002
> @@ -41,8 +41,8 @@
>  #if defined(__CYGWIN__) && !defined (_JBLEN)
>  #define _JBLEN (13 * 4)
>  #elif defined (__i386__)
> -#ifdef __unix__
> -# define _JBLEN        36
> +#if defined(__unix__) || defined(__rtems__)
> +# define _JBLEN        (9 * 4)
>  #else
>  #include "setjmp-dj.h"
>  #endif
>