[lazarus] Clean build from nothing

[Florian Klaempfl]

cryst at golden.net wrote:
> 
> That was a lot of typing to argue against doing a gcc port. (which was not at 
> all what I had in mind). I was thinking more of building the fpc compiler 
> using tools like flex and bison etc to handle the parsing, 

The parsing isn't the difficult thing in a compiler.

> and making a mini 
> compiler which could be used to make the main fpc. I wasn't at all 
> considering making gcc and fpc one in the same. 
>>This might change in near-middle the future (by setting a define when
>>recompiling FPC) to switch the default to use libc as back end on *nix.
> 
> 
> I've got to be misunderstanding something. If you are able to do a syscall, 
> why can't you do a lib call? Isn't it a case of translating a C header into a 
> pascal header and linking it in? (I think there's code out there somewhere to 
> handle this).

Of course, we could. But there are so much flavours of libc outside that 
we decided to use syscalls instead of libc. Just try to run a Hello 
world in C++ compiled and as usual dynamic linked e.g. on a SuSE 8.x on 
e.g. a RH 7.x ... I guess nobody knows for sure if this works. A FPC 
compiled Hello world requires nothing than a kernel with elf support...