Packing structures in gcc

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Article #52420

#52420

From: Graham Hausler
Date: Thu, 17 Sep 1992 08:08

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I have a problem with gcc, and wonder if there is a quick solution to it...
I am developing communications on an m88k system to communicate with an m68k
system, using gcc, but am having trouble with default alignments within
structures....

The m68k likes to align on even addresses, but the m88k wants to align on
4-byte addresses, making the use of 'short's and 'char's within structures
dangerous.... (I know the RISC m88k loves 4-byte addresses/operations..)

Does gcc support 'packing' structures, ie only allocating the 'sizeof' the
element, and not attempting to align the next element on the next 4-byte
address (for the m88k). I would be happy if I could get it to use just 
even address alignment. I have tried using the __align__ attribute, but with
no effect ... I am using gcc-2.1

Please email any suggestions, thanks
Graham Hausler.

-- 
Internet:   hausler@aldetec.oz.au      --> GEMCO, Perth, Australia.

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From: hausler@aldetec.oz.au (Graham Hausler)
Newsgroups: gnu.gcc.help,gnu.misc.discuss,comp.sys.m88k
Subject: Packing structures in gcc
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Date: 17 Sep 92 08:08:32 GMT
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