[fpc-devel] 64 bit version problem

[Jonas Maebe]

On 28 Jan 2008, at 17:00, Miklos Cserzo wrote:

> Jonas Maebe wrote:
>
>> Try compiling with -Aas, because the internal assembler is quite  
>> broken for x86_64 in 2.2.0.
>
> That gives equivalent result as replacing the compact nested  
> reference of the array element with the several simple references,  
> i.e. 'score' cumulates non-zero values but the program still behaves  
> very differently on 64-bit relative to the normal 32-bit situation.

Then you'll have to submit a bug report with a sample program that  
demonstrates the program, otherwise we cannot fix it.

>>> Is there a command line switch instructing the compiler to  
>>> generate 32-bit executable on 64-bit environment?
>>
>> No.
>
> Well, it would be a good idea to implement it eventually if my word  
> counts.

It has nothing to do with whose word counts; the compiler simply can  
only contain one code generator. The fpc wrapper can however call  
different compilers based on the -P switch (-P386 -> call ppc386, - 
Px86_64 -> call ppx64, ...).

>>> If not, can the two versions of the complier coexists in parallel?
>>
>> Yes.
>
> What is the trick then? When I install it from the RPM the two  
> installation will overwrite each other.

That's an error in the way the rpms are built then, but I don't know  
nothing about rpm building. The default configurations support  
multiple concurrently installed versions (for the same or different  
architectures) out of the box.


Jonas