How gcc is compiling c program

sharmila's Avatar, Join Date: Mar 2006
Contributor
Hi all,
I read that gcc is written in C language and can compile itself. But I did not understand how it will happen.Can anyone explain me how can a program compile itself?

Regards,
sharmila
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sharmila's Avatar, Join Date: Mar 2006
Contributor
sorry.. my title is different.. how gcc is compiling itself?
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DaWei's Avatar, Join Date: Dec 2006
Team Leader
Source code is source code. The compiler doesn't know or care.
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sharmila's Avatar, Join Date: Mar 2006
Contributor
http://www.network-theory.co.uk/docs...ccintro_5.html

In the link menctioned above, in 2nd para, there is a statement " GCC is written in C with a strong focus on portability, and can compile itself, so it can be adapted to new systems easily. "
what does this mean?

If we wrote a c-program, the compiler has to understand c-syntax, if the compiler itself is in C then how do it know which syntax it has to follow.
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shabbir's Avatar, Join Date: Jul 2004
Go4Expert Founder
Its an incremental development. Say I have a language X (could be an assembly as well) where I write the initial stages of the compiler and then use that compiler to develop the program itself. Now the final C compiler of GCC is developed in C and it could so happen that the initial module is also advanced to the C language.
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sharmila's Avatar, Join Date: Mar 2006
Contributor
Thanks Shabbir..