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Re: Bug#285396: [ARM] wide chars don't work

Keith Packard wrote on 12 Jan 2005 00:03:31 +0100:

> No, Xlib assumes that the alignment of the struct or union is the alignment
> of the most restrictive element in that struct or union. Before ANSI C
> (note, not C99, but the original ANSI C which postdates Xlib), this was the
> way C worked.  That ANSI C permits more 'flexible' layout is an ABI
> incompatible change between K&R and ANSI C.

Couldn't that assumption in the Xlib be removed using the real size of
the structure ?

> We're talking here about a struct containing two chars.  On almost every 
> machine we've seen, save the ARM, this is two bytes.  Would a structure 
> containing an array of two bytes also be padded to four bytes on this 
> architecture?

Yes, in both cases the resulting structure has a size of 4 bytes.


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