[lug] OFF: sizeof structs in gcc?
tkil at scrye.com
Thu Jun 7 14:22:34 MDT 2001
>>>>> "Scott" == Scott A Herod <herod at interact-tv.com> writes:
Scott> Ahhh, I found it. The info page on gcc says to use pack you
Scott> must first #define HANDLE_PRAGMA_PACK_PUSH_POP 1
[slight reordering here]
Scott> The info page has a LOT more information that the man page.
Scott> Looks like there is even a variable `STRUCTURE_SIZE_BOUNDARY'.
these are both macros that are used only by machine description files,
so far as i can tell. you really want the __attribute__ stuff instead.
Scott> The windows code that I am porting was sending a class across a
Scott> socket connection. I confess to having done the same thing
Scott> myself in the past, but think that it's pretty evil. ( Of
Scott> course my current code won't work on a big-endian machine
Scott> talking to a little-endian. )
glad that you know this. :) the c faq has a subtle rebuke in it:
Q 2.12: My compiler is leaving holes in structures, which is
wasting space and preventing ``binary'' I/O to external
data files. Can I turn off the padding, or otherwise
control the alignment of structure fields?
note the scare quotes around "binary"...
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