Bytes order and words order

[Neil Booth]

Gabriel Dos Reis wrote:-

> 
> Hi,
> 
>   Supports for floating-point data types in the C++ runtime system
> require me to know the bytes and words orders used by the target.  I
> would like to have means for the front-end or driver to pass those
> information down to the library.  I think a minimal path would be for
> CPP to define some macros like
> 
>     -D__TARGET_BYTES_ORDER__=__BIG_ENDIAN__ (or __LITTLE_ENDIAN__)
>     -D__TARGET_WORDS_ORDER__=__BIG_ENDIAN__ (or __LITTLE_ENDIAN__)
> 
> with, for example, __LITTLE_ENDIAN__ and __BIG_ENDIAN__ predefined to 0
> and 1 respectivelly.  The same set of macros would be needed for the
> host in case of cross-compiling.
> 
> I'll also need symbols for the floating-point model used.
> 
> Thoughts? Neil?

I agree with someone else who suggested you drop TARGET_, for
consistency.  If you have something host-specific, prefix that
with HOST_.

The code would go with the others in c-common.c.

Neil.