#pragma pack

[Joern Rennecke]

> I will be adding some form of #pragma pack to our C/C++ compiler on
> most platforms to support the inclusion of third party headerfiles
> that assume that the structures are packed.  The open question, is how
> best to achieve that.  I tried HANDLE_SYSV_PRAGMA but that logic fails
> to work, in fact, I don't see how most ports could make use of the
> code in c-pragma.c.  Is there a port that someone can say does
> currently work with that scheme?  My preference is to reuse the most
> popular existing scheme.  Should I just blaze away and fix up c-pragma
> to work as expected?  What is expected?

HANDLE_PRAGMA is due for overhaul, so that it can work together with
USE_CPPLIB.  Its set of arguments will have to be changed.  This
requires changes in the backend as well as in all ports that use
HANDLE_PRAGMA.  I suggest you do that first; when you have done that,
it should be easier to use the code in c-pragma.c, since HANDLE_PRAGMA
should be passed a (not necessarily proper) superset of parameters,
when compared to HANDLE_SYSV_PRAGMA.