On Sun, Nov 12, 2006 at 04:59:04PM +0000, Nicholas Clark wrote: > On Sun, Nov 12, 2006 at 06:57:23PM +0300, Ruslan Ermilov wrote: > > So your sizeof() argument, well... I don't understand it and it > > doesn't make things clearer at least to me. I still believe this > > is bug in GCC that the alignment requirement is so high for a > > "struct foo { char x; }" (there's no real reason for this!). > > It is no bug in GCC. ANSI C gives extreme flexibility for the compiler to > align (or pad) structures. The assumptions in the code you presented are not > portable. The problem tends to be that ARM is the only common platform that > does structure alignment this way, so tends to trip up a lot of code that > has worked just fine in many other places. > > There is a lot more detail in > http://netwinder.osuosl.org/users/b/brianbr/public_html/alignment.html > including how gcc's __packed__ extention can be used to tell gcc to align > structures in different ways. > Thanks! Item 2 at this URL has an answer to my question. Cheers, -- Ruslan Ermilov ru_at_FreeBSD.org FreeBSD committer
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