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1 | +# Here I collect some interesting links. | |
2 | + | |
3 | +## cargo environment | |
4 | + | |
5 | +Currently I always build all dependencies within th projects own .cargo subdir | |
6 | +by setting the environment variable CARGO_HOME. | |
7 | + | |
8 | + export CARGO_HOME=./.cargo | |
9 | + | |
10 | +Actually I am quite unsure if that is really a good idea because this results | |
11 | +in a lot of rebuilds for each new project. | |
12 | + | |
13 | +## Implement Monads with rust. | |
14 | + | |
15 | +Which is currently difficult through impossible, but might be feasible with | |
16 | +some small additions to the rust type system, namely | |
17 | +«(generic) associated traits.» | |
18 | + | |
19 | +[Read here](https://varkor.github.io/blog/2019/03/28/idiomatic-monads-in-rust.html) | |
20 | + | |
21 | +### Is impl Trait what we needed? | |
22 | + | |
23 | +A new language feature which sounded a bit like the needed one for above is: | |
24 | + | |
25 | +[impl Trait](https://medium.com/@iopguy/impl-trait-in-rust-explanation-efde0d94946a) | |
26 | + | |
27 | +Crossreading it a bit seems to indicate that this is not like the above needed | |
28 | +language feature. | |
29 | + | |
30 | +## WASM ... on gentoo ... | |
31 | + | |
32 | +Right now rust is not really a first class citizen within the gentoo eco | |
33 | +system. For that reason at least when compiling rust with the `system-llvm` | |
34 | +use flag some manual preparations are needed. | |
35 | + | |
36 | +### rustwasm tutorial | |
37 | + | |
38 | +[rustwasm](https://rustwasm.github.io/book/introduction.html) | |
39 | + | |
40 | +### location of rustlib ... | |
41 | + | |
42 | +`wasm-pack` expects the wasm runtime under /usr/lib/rustlib/ but a gentoo | |
43 | +installation puts it under /usr/lib/rust-1.39.0/rustlib/. To come around this | |
44 | +issue I just created a symlink. | |
45 | + | |
46 | +### Missing lld | |
47 | + | |
48 | +Again `wasm-pack` searches for llvm-lld or rust-lld for the link phase. This | |
49 | +is currently not a dependency for llvm with WASM support, so I installed it | |
50 | +manually. Finally you have to tell rustc to use lld as linker via this | |
51 | +environment variable: | |
52 | + | |
53 | + export RUSTFLAGS="-C linker=lld" | ... | ... |
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