On 8/8/2015 12:30 AM, Sven Barth wrote:
Am 08.08.2015 00:37 schrieb "Ralf Quint" <freedos...@gmail.com
<mailto:freedos...@gmail.com>>:
>
> On 8/6/2015 8:25 PM, Xiangrong Fang wrote:
>>
>> It seems that $packrecord does not work at all.
>
> I always explicitly use PACKED Record as in
>
> Type ifmap = PACKED Record
> mem_start: dword;
> mem_end: dword;
> base_addr: word;
> irq: byte;
> dma: byte;
> port: byte;
> end;
>
> and at least in/up to FPC 2.6.4, this works for me just fine
This depends however on the code you're interfacing with. Also the
record you mentioned as an example shouldn't differ with and without
packed anyway...
I just copied and pasted the code snippet from the OP, to show how to
use the PACKED Record statement explicitly for a specific record. I am
using this for cross-platform/cross-compiler/cross-language software for
at least 30 years now and probably for +20 years in FreePascal (when it
was still called FPK and was an attempt of creating a 32bit compiler
compatible with 16bit Turbo/Borland Pascal at that time)...
Beside, on the above record, the layout in fact SHOULD matter as it has
3 single bytes at the end and there for needs to be aligned on the byte,
not on any word/dword/etc boundary...
Ralf
Ralf
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