Compiling the compiler

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

 rm *.ppu *.o

 del *.ppu
 del *.o

 ppc386 -Tlinux  -Fu../rtl/linux -di386 -dGDB pp.pas

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 configuration is on the system. If the compiler should be compiled with the RTL that was compiled first, this should be ../rtl/OS (replace the OS with the appropriate operating system subdirectory of the RTL).
3. A define 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 specific: the scanner).

So the absolute minimal command line is

 ppc386 -di386 -dGDB -Sg pp.pas

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).