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Compiling Rust with GCC: an update

Compiling Rust with GCC: an update

Posted Sep 13, 2022 2:37 UTC (Tue) by mjg59 (subscriber, #23239)
In reply to: Compiling Rust with GCC: an update by paulj
Parent article: Compiling Rust with GCC: an update

No, you can generate a trusted compiler via a directly introspectable process. Pick an architecture. Write a trivial assembler directly in machine code. Use that to bootstrap a more competent assembler. Write a trivial C compiler. Use that to build an extremely old version of gcc. Use that to build a modern version of gcc. Use that to build a cross-compiler for whatever architecture you actually care about. You now have a trusted compiler, and the rest of Diverse Double Compilation falls out of that.

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Compiling Rust with GCC: an update

Posted Sep 13, 2022 4:01 UTC (Tue) by pabs (subscriber, #43278) [Link]

The Bootstrappable Builds project is an example of doing just that, although they aim to bootstrap all architectures from that initial machine code step, without going through the cross-compiler stage:

https://bootstrappable.org/

Compiling Rust with GCC: an update

Posted Sep 13, 2022 9:54 UTC (Tue) by paulj (subscriber, #341) [Link]

Building your own trusted tool chain is following Thompson's advice on what you need to do to build trust. So... not DDC.


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