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Old 01-14-2003, 07:09 AM   #1
Grim Reaper
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I've always pondered this question...


Ok, so I've built a LFS system...but technically its not really from COMPLETE scratch...i wanna do something that you build from absolute scratch!! is that possible?

but thats not the question i've been pondering...the question is: how do you compile say, gcc, without a compiler??? hehe...so how do you compile a compiler (without one already installed, however they got it there..)...how did the first compiler get compiled, lol....just a little question...

so would it be possible to start from the absolute scratch?
 
Old 01-14-2003, 07:17 AM   #2
0x0001
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opcodes, opcode macroing -> assembler compiler. and so on.

The trick is that the first compiler was probably just a macro expander. From that on they got more and more complex.
I guess, I was not around at that time
 
Old 01-14-2003, 04:06 PM   #3
Grim Reaper
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hehe...

anybody wanna add onto that?
 
Old 01-14-2003, 04:35 PM   #4
yngwin
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How to compile a compiler is a chicken-and-egg kind of problem. I've been pondering the same. I suppose if one were knowledgable enough, one could write a compiler in assembly...?
 
Old 01-14-2003, 04:49 PM   #5
MasterC
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Grim, you could, in theory do this (with something like Assembly). I am just about as green as they come when it comes to coding, so I really don't even know the depth it would take to undertake such a project.

But for now, we are lucky enough to not have to, with the LFS project's way, or with just using a precompiled binary on a truly nekkid drive. Either way, it's something the average (and probably even the more advanced) user doesn't have to worry too much about.

If you wanted to undertake a project like that, I'd see about joining a mailing list:
http://www.gnu.org/software/gcc/
Or you might even find the actual answer to your question just pluggin around that site. Either way, I'm sure it will be a lot of work, and if you do decide to try it out, let us know how things go, some sort of progression thread.

Cool
 
Old 01-14-2003, 04:54 PM   #6
MasterC
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http://compilers.iecc.com/comparch/article/97-06-113

Just out of curiosity, I found some links and pages over at the link to gcc I posted in that last thread, I came upon the above link. I didn't read through it, however this person seems to have a similar idea as you

Cool
 
Old 01-14-2003, 07:50 PM   #7
whansard
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gcc can compile itself before its installed. its
a minimal sort of compile, and you have to recompile
it later.
i remember something like
make bootstrap
or something like that
 
Old 01-14-2003, 08:49 PM   #8
Bert
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Think about what a compiler actually has to do with a source code, then have a look at:

man yacc

Bert
 
  


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