Hello,

After noticing that gdb does not print 64 bit fields of (bit)packed records properly if they don't start on a byte boundary (both with fpc and with gpc), I decided to check what gcc does. It turns out that gcc (4.0.1, Mac OS X/ppc) only bitpacks values up to and including 59 bits. Fields declared as 60-64 bits are automatically aligned to the target-specific alignment boundary.

Does anyone here know why this is the case, and possibly where this is documented? I can't find anything with Google.

Thanks, Jonas

Maybe you should be looking into the bit-packing macros provided with the Pascal Macro Compiler. This will give you bit-packing which is independent of the particular Pascal compiler you happen to be using. See www.mastersoftware.biz/pasbit.htm

Frank Rubin

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