Pascal language - Free Pascal Compiler Error!

[matt140]

Hi All!

Ive been searching for ages for a tutorial for using Pascal as a language for
OS development. When I try to compile kernel.pas (from http://wiki.osdev.org/Pascal)
it generates the error: Can't find unit system used by kernel. However, the System unit isn't
in the uses list!

Any ideas, hope you can help!
Thanks, Matt.

[thepowersgang]

What command are you using to compile the kernel?
There should be an option to disable automatic includes in the command line.

[matt140]

Heres the command i'm using:
fpc -Aelf -n -O3 -Op3 -Si -Sc -Sg -Xd -Rintel -Tlinux kernel.pas

Any Ideas?
Thanks, Matt.

[Laksen]

The system unit is automatically included whether you want it or not. This is theoretically where all the types and runtime routines are defined. Ofcourse some are defined by the compiler internally. But you'll have to supply a few. HResult must be defined for example

just make a system.pas like this:

unit system

interface

type
Cardinal = 0..$FFFFFFFF;
HResult = Cardinal;

implementation

end.

[leledumbo]

Don't forget to add {$FPC_IS_SYSTEM} directive or it will still try to add implicit uses System; statement.