Re: Some more rust/cargo insights

[Hartmut Goebel <h.goebel@crazy-compilers.com>]

Am 07.06.21 um 10:28 schrieb Pjotr Prins:
> Exactly my idea. One challenge will be that the source of dependencies
> need to be available - think of it as include files. One thing we
> could do as ship them as part of the Guix package. Or have a separate
> one for sources. We do that for include files already.

Well, the current cargo-build-system already handles the source 
dependencies.

We need to aim towards pre-built libraries (rlib, much like .a files in 
C, I assume)

When cargo calls rustc, the command looks like:

LD_LIBRARY_PATH='$PWD/target/release/deps:/gnu/store/…-rust-1.45.2/lib' \
rustc … src/lib.rs --crate-type lib \
-L dependency=$PWD/target/release/deps \
--extern 
xmlparser=$PWD/target/release/deps/libxmlparser-53596ac1828b1c97.rmeta

Thus I assume one could pass the rlib's of all dependencies in -L and 
the respective mata-data in --extern

-- 
Regards
Hartmut Goebel

| Hartmut Goebel          | h.goebel@crazy-compilers.com               |
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