--- Log opened Wed Nov 13 00:00:06 2019
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02:57 < stevenroose> elichai2: what are those stages? Is mrustc's goal only to build rustc? Could it also build other Rust crates?
03:02 < elichai2> stevenroose: so generally any compiler you build, you usually first build it with an older compiler so that older one is stage0. with that older stage0 compiler you build the current compiler code and you get stage1. now that compiler is probably "better" than an older one, so you want to build the compiler again now with the new compiler :) that's how you get compiler stage 2.
03:02 < elichai2> then you usually want to use stage2 compiler to build the compiler again and compare the resulting binary. that's stage3
03:03 < elichai2> anyhow. mrustc can build crates, but the main goal is to build rustc
03:07 < stevenroose> elichai2: wait in your story you built the current compuler 3 times? Is there a reason to stop at 3? Or does "compare the resulting binary" implies that if you make improvements, you keep adding changes? Or does it somehow always end at stage3 for obvious reasons I'm just not seeing right now? :D
03:08 < elichai2> stage2 compiler should be the most optimized ready to use compiler. so if that compiler can produce a "better" compiler than itself than something in the logic is broken
03:08 < elichai2> so stage2 should be exactly the same as stage3
03:11 < elichai2> anyhow, now that we found that the reason I couldn't build latest mrustc is because of a bug in gcc 9, i'll try building it with clang and see what's what
03:13 < stevenroose> a bug in gcc9?? :O thanks for that info, though
03:15 < elichai2> stevenroose: https://github.com/thepowersgang/mrustc/issues/123
03:16 < elichai2> oh I just remembered, last time I tried building rust-bitcoin/secp with mrustc I got to problems because the `cc` crate has autodetection for your rustc version. but this should've been fixed in https://github.com/thepowersgang/mrustc/issues/122
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--- Log closed Thu Nov 14 00:00:08 2019