[Lazarus] ARM-WinCE test - DBF

[Florian Klaempfl]

Joost van der Sluis schrieb:
> Op zaterdag 17-05-2008 om 21:06 uur [tijdzone +0200], schreef
> cc_ at freemail.hu:
>> I probably do not see the depth of the problem, and this seems to be just 
>> too easy, but for me this should be done on the compiler level: how about a 
>> compiler switch which forces the compiler to "think" as if the  "unaligned" 
>> keyword was there at  the potentially  problematic assignments.  FPC and 
>> Lazarus aims to have a single source for all platforms, and this is broken 
>> if you have to change the source for ARM.
> 
> Is there an "unaligned" keyword? 

Yes.

> What does it do? And how does it helps
> me? 

Tell the compiler to access memory location assuming that it is not 
aligned naturally:

var
   p : plongint;

begin
   getmem(p,8);
   inc(pointer(p),1);
   { seg. faults: }
   p^:=1234;
   { works }
   unaligned(p^):=1234;
   { seg. faults }
   writeln(p^);
   { works }
   writeln(unaligned(p^));
end.

> Remember I told you this:
> 
>> ----- Original Message ----- 
>> From: "Joost van der Sluis" <joost at cnoc.nl>
>>> And the only thing I know about alignment, is that it has something
>> to
>>> do with starting each 'thing' (word, integer, longint) on an
>>> memory-location that could be divided by 2/4/8/whatever.
>>>
> 
> Joost
> 
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