[fpc-pascal] Does FPC has consts of portable OS error codes?

[Marco van de Voort]

In our previous episode, Bihar Anwar said:
> On 12 May 2010, at 05:53, Bihar Anwar wrote:
> 
> >> As the title says. :-)
> 
> > No, it doesn't.
> 
> Any reason for that? or it is not implemented yet?

FPC does not support abstraction of operating system errorcodes, and doesn't
plan to.

The experiences in this regard (e.g. with the DOS unit) were not
exactly positive.

Note that the fact that some header tries to hapzardly try to implement this
for just two platforms doesn't prove this is universally possible.