F.4.2 Compiling the compiler

Compiling the compiler can be done with one statement. It's always best to remove all units from the compiler directory rst, so something like

on linux, and on dos

After this, the compiler can be compiled with the following command-line:

So, the minimum options are:

1. The target OS. Can be skipped when compiling for the same target as the compiler which is being used.
2. A path to an RTL. Can be skipped if a correct fpc.cfg conguration is on the system. If the compiler should be compiled with the RTL that was compiled rst, this should be ../rtl/OS (replace the OS with the appropriate operating system subdirectory of the RTL).
3. A dene with the processor for which the compiler is compiled for. Required.
4. -dGDB. Required.
5. -Sg is needed, some parts of the compiler use goto statements (to be specic: the scanner).

So the absolute minimal command line is

Some other command-line options can be used, but the above are the minimum. A list of recognised options can be found in table (F.1).

This list may be subject to change, the source le pp.pas always contains an up-to-date list.